64-0009 Rev A (ME-SSI).indd
Contents
1. a If using the remote control wait till the CHG LED on the remote control for both units stops blinking and comes on sol id Press the INVERTER ON OFF button to disable the Inverter mode and verify the INV LED turns off and that the loads con nected in Step 8 continue to work b Without the remote control the Status LED on both invert ers will come on Press the inverter s Power ON OFF switch and verify that the loads connected in Step 8 continue to work 10 Check the Charge mode Verify the batteries are being charged may take minutes before the charge current Is actually seen a If using the remote control monitor the CHG LED on the remote if it is blinking on either remote press the CHARGER ON OFF button on that remote to turn the charger on Verify the CHG LED on both remotes are on solid not blinking and the remote display shows that they are both in Charge mode i e Bulk Charging Absorb Charging etc b Without the remote control the Status LED on both invert ers will come on the LED will be on solid or blink depending on the Charge mode This completes the functional test If the inverters are function ing correctly as a series stacked pair continue to the Inverter and Charger Operation sections If any step did not operate cor rectly refer to the Troubleshooting section in this manual or in the owner s manual for your inverter 17 2010 Magnum Energy Inc Operation Inverter2. ry Pi Va ff Y VES W EE GS EVE E N E R G Y ME SSI Series Stacking Interface Owner s Manual Disclaimer of Liability The use of this manual and the conditions or methods of installation operation use and maintenance of the ME SSI Series Stacking Interface are beyond the control of Magnum Energy Inc Therefore this company assumes no responsibility and expressly disclaims any liability for loss damage or expense whether direct indirect consequential or incidental that may arise out of or be in any way connected with such installation operation use or maintenance Due to continuous improvements and product updates the images Shown tn this manual may not exactly match the unit purchased Restrictions on Use The ME SSI may only be used in life support devices or systems with the express written approval of Magnum Energy Failure of the ME SSI can reasonably be expected to cause the failure of that life support device or system or to affect the safety or effectiveness of that device or system If the ME SSI fails it is reasonable to assume that the health of the user or other persons may be endangered Contact I nformation Magnum Energy Inc 2211 West Casino Rd Everett WA 98204 Phone 425 353 8833 Fax 425 353 8390 Web www magnumenergy com Revisions Required Your MS4024 inverter and remote control if used must have the correct revision level in order to work in a series stack
3. Charger settings If a remote control is used care should be taken to insure that battery charger settings are the same for both inverter chargers Without a remote control the default settings on each unit will be coordinated If you are using a remote control then check that the Adj Charge Rate Adj Batt AmpHrs Adj Bat tery Type and Adj VAC Dropout settings on the two units are the same Charging with a generator If you manually start a generator and use it as the AC source to charge the inverter batteries you Should be aware that because both inverters will be charging the same battery one may taper off first and finish the Bulk Charge Stage before the other When one inverter has reached the Float Charge stage after both units were charging in the Bulk Charge Stage then it is best to turn off the generator running a genera tor to only float charge your batteries is very inefficient and if pos Sible should be avoided Fi Info During Bulk Charging both inverters will attempt 19 2010 Magnum Energy Inc Troubleshooting Troubleshooting Inverter Faults Both units will shut down if either has an auto resetting fault condition such as high battery low battery or over temperature Both inverters will automatically come back on when the fault con dition has been cleared If one or both units experience any of the manual reset fault con ditions like a continuous AC overload or internal faults both units will
4. EEEREN ENAA 20 IEO FPA tenes sara E E E A ET 20 SAKNO TMCS EEEE E E T 20 Troupleshootng DS scree AE TEREN 20 Warranty Service nformation s ssss222 2 22 25 2 2 2 5 5 21 How to Receive Repair Service s ssseserererererersrsrerrrrrerrrrrrne 22 Table of Figures Figure 1 Series Stacking Interface ME SSI Components 1 Figure 2 ME SSI Components Connected to Stacked Pair 3 Figure 3 DC Wiring Using One Battery Cable Pair 005 4 Figure 4 DC Wiring Using Two Battery Cable Pairs 0005 5 Figure 5 Incorrect DC Wiring ssseseserererersrsrsrererrrererrrrrrrrrrn 6 Figure 6 Stack Port Location on MS4024 ssssesererererererererrn 7 Figure 7 Single In Single Out 30A with 120 240VAC source 11 Figure 8 Single In Single Out 30A with 120VAC only source 11 Figure 9 Single In Single Out 60A with 120 240VAC source 12 Figure 10 Single In Single Out 60A with 120VAC only source 12 Figure 11 AC Wiring compartment MS4024 model 14 2010 Magnum Energy Inc IV Introduction Introduction Magnum Energy s Series Stacking Interface ME SSI kit allows two MS4024 models to be connected together in a series stacked configuration to provide 120VAC and 240VAC outputs When con nected together in a series the AC output of each inverter continues to provide 120VAC but the two 120VAC output waveforms are also phase l
5. Only MS4024 inverter models are stacked together e NEUT OUT of both inverters are connected to the same neutral bus e DC and AC grounds are both connected and properly installed e AC input connections and AC output connections are wired correctly on the terminal block and not reversed double check before turn on e All DC connections are properly connected and tight 15 2010 Magnum Energy Inc Operation Battery voltage is within the DC voltage range for your inverter The DC negatives of each inverter are connected together us ing the negative DC interconnect provided i e 2 0 AWG and 3 feet max The positive battery cable s is connected to the positive battery terminal through a DC disconnect and overcurrent device The negative battery cable s is connected to the negative battery terminal Power up Sync Test 1 While monitoring the Status LED located on each inverter apply 2 DC voltage to both inverters at the same time ensure AC is not connected to both inverters within 15 seconds of each other The units go through an auto detect when first powered up to synchronize the units for series stacking If both units are not powered up within this time then series synchronization will not occur f CAUTION It is crucial that the DC voltage be connected The Status LED on both inverters should blink 9 times in sync This indicates that the two units have recognized each other and are
6. Operation Invert Mode The units are turned on by pressing the Power ON OFF switch on either inverter Alternatively they can also be start ed by pressing the INVERTER ON OFF button on a remote control connected to either inverter When the two inverters are inverting they communicate over the Stacker cable This cable communi cates to monitor the AC output from each inverter and shift it 180 out of phase from each other to provide 240VAC on both units and to verify that there are no faults on either unit to prevent only one unit from inverting The two units also use the DC negatives as a reference point while they are communicating hence the reason why the DC negatives must be tied together to ensure there is no negative voltage difference between the two units Inverter settings When the units are inverting as a series Stacked configuration certain settings must be coordinated in each unit for proper operation Without a remote control the default settings on each unit will be coordinated If using a remote con trol check that the following settings are the same between the two units 1 Ensure the Adj LowBatCutOut setting is the same for both units 2 If the Search mode is needed then set the Adj Search Watts setting for each inverter to determine when to start powering 120VAC loads The two inverters are independent which means one inverter can come out of Search mode and start inverting while the other unit continues
7. communicating as a series stacked system Testing Invert Mode 3 Press the Power ON OFF switch on either inverter this should turn on both inverters If using a remote control press the INVERTER ON OFF button on either remote and then verify that the INV and PWR LED on both remotes come on If either unit is Searching you must disable the Search mode prior to making any voltage measurement The inverters should now be providing 120 240VAC to the AC sub panel Measure the voltage between the L1 terminal and the neutral bus in the AC sub panel This voltage should be 120VAC 6VAC Measure the voltage between the L2 terminal and the neutral bus in the AC sub panel This voltage should be 120VAC 6VAC Measure the voltage between the L1 and L2 terminals in the AC Sub panel This voltage should be 240VAC 12VAC Turn on the AC load breakers in the sub panel which are pow ered by the inverters 2010 Magnum Energy Inc 16 Operation 8 Turn on a 120VAC load powered by the inverter feeding the L1 terminal and verify that it works Turn on a 120VAC load pow ered by the other inverter which feeds the L2 terminal and verify that both of these loads work Turn on a 240VAC load powered by the hot outputs of both inverters and verify that it works correctly leave all these loads on Testing AC Transfer Charge Mode 9 Check the AC transfer Apply AC power to both inverters after a few seconds
8. current into and out of the battery bank evenly and may not allow the second inverter to receive sufficient current if powering a heavy load If you have a single battery cable pair use Figure 3 to guide you in wiring your DC battery cables to the Stacked pair of inverters 2010 Magnum Energy Inc 6 Installation The Stacker Cable The stacker cable provided in the ME SSI kit is specifically de signed for series stacking two MS4024 model inverters It allows information exchange between the two stacked inverters for two main purposes to provide synchronization information while inverting and to send a shut down command if a fault condition is detected This shut down command prevents any 240VAC load from receiving only 120VAC power CAUTION Do not use a standard telephone or data cable in place of the stacker cable or damage may occur Info The stacker cable doesn t allow programming or access to the display from one inverter to the other If changes or monitoring are necessary a remote control must be connected to the affected inverter It is highly recommended that you use two remotes in order to monitor and set each inverter Connecting the Series Stacker Cable The stacker cable is a 48 inch six wire twisted pair cable easily indentified with a red STACKER label on each end This cable also has two RJ 11 connectors on each end which allows an easy con nection to the Stack Port on each inverter Once the inver
9. green wire with the insulated connector see Figure 11 This connects the neutral and ground inside the inverter 3 Pull the two ends of the insulated connector apart to separate the green wire This prevents a neutral ground connection 4 Move the two disconnected ends away from each other and push them back out of the way The two connector ends Shouldn t have any contact with any other wires within the compartment Use electrical tape to insulate the ends Neutral to ground connection green wire z Da mane Figure 11 AC Wiring Compartment MS4024 model Grounding Ensure all components are grounded properly for safety and code compliance Refer to your inverter s owner s manual for specific grounding information on your inverter WARNING When stacking inverters ensure the chassis AN of each inverter is connected to the same common ground i e in the utility or inverter panel otherwise a hazardous voltage difference may be present between them The installation is complete follow the information provided in the Operation section to test and operate the series stacked system 2010 Magnum Energy Inc 14 Operation Operation When two Inverters are series stacked and inverting they coor dinate with each other to ensure the output can power 240VAC loads This requires that the inverters turn on together and switch to the AC source at the same time and both inverters should shut down
10. if either one becomes inoperable This Operation section provides a functional test to ensure the two inverters are working together as a series stacked pair and also provides information pertinent to the set up and operation of a series stacked configura tion Using the Remote Control The default settings in your inverter are adequate for most installations however in a series stacked configuration we highly recommend using the ME RC50 or ME ARC50 remote controls These remote controls can be used to monitor the inverter s status and make set up changes A single remote can be used to config ure each inverter but not at the same time If you want the ability to monitor and configure both units at the same time each invert er will require its own remote Info To use a remote control it must have revision il 1 2 or higher to work properly with a series stacked configuration Functional Test Series stacked inverters must communicate together to provide 120 240VAC to the loads and shut down if any inverter faults oc cur This functional test will confirm the two units are operating correctly as a series stacked pair Before performing the functional test ensure the following e All DC disconnects to the inverters are turned off e All AC input and output circuit breakers are turned off e Only the stacker cable provided in the ME SSI is used e The stacker cable is connected to each inverter s Stack Port red label e
11. shut down These types of faults require a manual reset by pushing one of the inverters Power ON OFF switch or by pressing the INVERTER ON OFF switch on the remote control if available If there are remote controls used in the system the inverter re mote combination with the fault will display the actual fault while the other inverter will display Stack Mode Fault which means the other unit has the fault Stacking Faults Info Having a remote for each inverter two remotes makes it easier to troubleshoot stacking faults In a series stacked configuration your remote may display a fault condition not possible on a single inverter installation Stack Mode Fault There is a problem with the other inverter Check the remote display of the other unit to determine the fault condition that must be cleared StackClock Fault There is a stacker cable problem or one inverter is losing syn chronization with the other inverter StackPhase Fault There is a problem with the AC input wiring or one phase was lost from the AC input source or one of the inverter s internal transfer relay is bad or the inverter s AC input circuit breaker may be open Troubleshooting Tips If there is no 240VAC output ensure that the Status LEDs on both inverters blink in synchronization the sync detection blinks 9 times total when DC power is first connected This is a stacker test and signifies that both units have autoconfigured
12. will be used as the sub panel main disconnect The sub panel then provides circuit breakers for the 120VAC and 240VAC branch circuits powering the loads AC Terminal Block When wiring to the inverter s six pole AC terminal block as a series stacked pair four different wiring configurations can be used These different wiring configurations depend on whether the output of your AC source can provide up to 30 or 60 amps and whether you are using a split phase 120 240 VAC AC source or a 120VAC only source If only wiring to the HOT 1 Single In Single Out 30 amps it means you have up to 30 amps pass thru and share the incoming power with the charger Wiring to the HOT 1 input with a jumper to the HOT 2 input Single In Single Out 60 amps provides up to 30 amps pass thru on each input 60 amps total recommended with a series stacked system as they Fi Info The Dual In Dual Out wiring configuration is not would conflict with one another 2010 Magnum Energy Inc 10 Installation Determine Which AC Wiring Configuration to Use Single In Single Out 30 Amps Using a single line HOT 1 for the input and output provides up to 30 amps AC pass thru and Shares power with the charger Use this configuration if your AC source is 30 amps or less See Figures 7 and 8 below MS4024 L1 AC LOADS 120 240 Figure 7 Single In Out 30A with 120 240VAC source MS4024 L1 240V Invert only Figure 8 Si
13. GUCUON P A A E A 1 PASCA ON munanna ENE 2 DC NIAN eae E E A E E E E 2 Battery Connections for Series Stacked Inverters 05 3 DC Wiring Using One Battery Cable Pair ccee cece eee 4 DC Wiring Using Two Battery Cable Pairs cceee cease 5 Incorrect DC Wiring c cece cesses cece eeeeeeeeeeeeseeeeeeseaeeereegs 6 TMG Stacker CaDlE ss career onenedeceenenccdscancamessaeaaas NEE AES 7 Connecting the Series Stacking Cable cceeeeeeeeeeeeeeees 7 AC WINN crs wos cae E E EERE EEE E eas 8 AG OU SOUL CS erne R EN E RETE ER EERE 8 AC WU AE T E E E E E E E 9 AC QUO e E AA E E A EE 10 AC lerminal BIOCK cissi risrisiedrorkiniri sadada kinana nE a AENEAN 10 Determine Which AC Wiring Configuration to Use 11 Neutral to Safety Ground Bonding Mobile applications 13 Eti e a e PPPE EEEE TTT TETE T 14 Jol AON MAR A T A T A AT 15 Using the Remote Control ssseseserererererrrrrrrrrrrrerrrrrrrerrrerne 15 FONC HON TE SE ER a EERE E EEE E E EEE 15 Power up Sync TeSt ssassssssssresrrrnrrrrrersrerrsrnrrrrrrrsrerrne 16 Testing Invert Mode sessssrererererrrrrrrrrrrrrrerrrererrrererererre 16 Testing AC Transfer Charge MOde ccccseeeeeeeseeeeeeeeeeaees 17 Inverter OPeration ccccceeeeeeeessseeeeeeeeeeeeeeeeueeeetsegueeeeteaaees 18 Charger Operati ponders ve senate vces sencha seauaudeanes caries asaienssesasaeenens 18 TFOUDIGCSNOGUING seperni Ennis
14. RETURNING ANY UNIT CONTACT MAGNUM ENERGY FORA RETURN MATERIAL AUTHORIZATION RMA NUMBER 21 2010 Magnum Energy Inc Warranty Service Information How to Receive Repair Service If your Product requires warranty service or repair contact either 1 An Authorized Service Center which are listed on the Magnum Energy Website at http www magnumenergy com ServiceCen ters htm 2 Magnum Energy Inc at Telephone 425 353 8833 Fax 425 353 8390 Email warranty magnumenergy com If returning your Product directly to Magnum Energy for repair you must e return the unit in the original or equivalent shipping container e receive a Return Materials Authorization RMA number from the factory prior to the return of the Product to Magnum En ergy for repair e place RMA numbers clearly on the shipping container or on the packing slip When sending your Product for service please ensure it is properly packaged Damage due to inadequate packaging Is not covered under warranty We recommend sending the Product by traceable or insured service 2010 Magnum Energy Inc 22 ry Pi Va ffi VES We GS EYE E N E R G Y Magnum Energy Inc 2211 West Casino Rd Everett WA 98204 Phone 425 353 8833 Fax 425 353 8390 Web www magnumenergy com PN 64 0009 Rev A 2010 Magnum Energy Inc
15. ble Pairs e DC Wiring Using Two Battery Cable Pairs Each inverter has its own battery cable pair positive and negative for each inverter connected to the battery bank There are two DC discon nect overcurrent devices one for each positive battery cable Use only the DC negative interconnect cables from the ME SSI kit be tween the two inverters in this configuration The positive intercon nect cable is not used in this installation as it may not meet electri cal code requirements and would cause performance issues if only one DC disconnect overcurrent device inadvertently opens 5 2010 Magnum Energy Inc Installation INCORRECT WAY TO CONNECT THE BATTERY BANK TO THE SERIES STACKED INVERTERS DO NOT WIRE THIS WAY The battery bank cables are going to one inverter this is NOT RECOMMENDED MS 4024 inverter Interconn Stacker cable from ME SSI from ME SSI kit satan oat DC disconnect and overcurrent protection 6 volt battery o O 6 volt 6 volt 6 volt 6 volt battery battery battery battery This battery bank uses two battery strings They must be connected together in parallel to provide a single battery bank to the inverters Figure 5 Incorrect DC Wiring e Incorrect DC wiring As shown in Figure 5 do not attempt to connect the positive and negative to one inverter and then jumper the negative and positive to the second inverter This will not distribute the
16. cked inverters is determined by the phase and voltage of the incoming AC source utility or generator The series stacked inverters can be operated from the following types of 120VAC 60Hz AC sources e Split phase 120 240VAC This AC type provides both 120 and 240VAC It has two 120VAC lines L1 and L2 a neutral and a ground The two 120VAC lines are 180 out of phase with each other so that the combination of the L1 and L2 lines total 240VAC and the voltage between either L1 or L2 and neutral is 120VAC When split phase power is connected to the HOT 1 IN of each inverter L1 to one inverter and L2 to the other inverter and passing through the inverters the incoming power is shared with the charger and the HOT 1 OUT lines continue to be 180 out of phase This source is the ideal type as it will be able to provide 120 240VAC to power loads when inverting and also in Charge Transfer mode See Figures 7 and 9 e Single phase 120VAC only This AC source has one 120VAC line one neutral and a ground The 120VAC line is fed to both the HOT 1 IN s of each inverter and when in Charge mode it will pass thru to the HOT 1 OUT s of each inverter The incoming power is shared with the charger but since the two lines come from the same source unlike the split phase type the two lines are in phase and the volt age between the HOT 1 OUT lines will be zero While this AC source is used to charge your batteries you must remember that
17. e parts Magnum Energy s limit of liability under the limited warranty shall be the actual cash value of the product at the time the original purchaser returns the product for repair determined by the price paid by the original purchaser Magnum Energy shall not be liable for any other losses or damages 4 Upon request from Magnum Energy the original purchaser must prove the product s original date of purchase by a dated bill of sale itemized receipt 5 The original purchaser shall return the product prepaid to Magnum Energy in Everett WA After the completion of service under this limited warranty Magnum Energy will return the product prepaid to the original purchaser via a Magnum selected non expedited surface freight within the contiguous United States and Canada this excludes Alaska and Hawaii 6 If Magnum repairs or replaces a product its warranty continues for the remaining portion of the original warranty period or 90 days from the date of the return shipment to the original purchaser whichever is greater All replaced products and parts removed from repaired products become the property of Magnum Energy 7 This limited warranty is voided if e the product has been modified without authorization e the serial number has been altered or removed e the product has been damaged through abuse neglect accident high voltage or corrosion e the product was not installed and operated according to the owner s manual BEFORE
18. ed configu ration The MS4024 requires a revision of 2 0 or higher To use a remote control i e ME RC50 or ME ARC with this product you need a revision of 1 2 or higher 2010 Magnum Energy Inc Safety symbols To reduce the risk of electrical shock fire or other safety hazard the following safety symbols have been placed throughout this manual to indicate dangerous and important safety instructions gt S WARNING This symbol indicates that failure to take a Specified action could result in physical harm to the user CAUTION This symbol indicates that failure to take a Specified action could result in damage to the equipment Info This symbol indicates information that emphasizes or supplements important points of the main text Ss PORTANT PRODUCT SAFETY INSTRUCTIONS This manual contains important safety instructions that must be followed during the installation and operation of this product Read all instructions and safety information contained in this manual before installing or using this product All electrical work must be performed in accordance with local state and federal electrical codes This product is designed for indoor compartment installation DO NOT expose to rain snow moisture or liquids of any type Use insulated tools to reduce the chance of electrical shock or accidental short circuits Remove all jewelry such as rings watches bracelets etc when installing or performi
19. ery This battery bank uses two battery strings They must be connected together in parallel to provide a single battery bank to the inverters A Figure 3 DC Wiring Using One Battery Cable Pair e DC Wiring Using One Battery Cable Pair Both inverters share a single battery cable pair one positive and negative It is divided between the two Inverters and is protected by a single DC disconnect overcurrent device The positive battery cable is con nected to the positive terminal of one inverter and the negative battery cable is connected to the negative terminal of the other in verter This is to ensure an even charge and discharge through the batteries The positive and negative interconnect cables provided are used to place the inverters as close to each other as possible 2010 Magnum Energy Inc 4 Installation This diagram is fora 24 VDC battery system Ensure your battery bank is wired correctly DC Negative Interconnect from ME SSI kit MS4024 inverter Stacker cable from ME SSI kit _ MS4024 inverter DC disconnects and overcurrent protection o et 6 volt 6 volt 6 volt 6 volt battery battery battery battery This battery bank uses two battery strings They must be connected together in parallel to provide a single battery bank to the inverters AJ Figure 4 DC Wiring Using Two Battery Ca
20. for Stacker mode The DC voltage must be connected to both inverters within 15 seconds of each other If both units are in Inverter mode and then shut down inspect the stacker cable and reconnect at both ends ensuring an audible click at both inverters Try to watch when the shutdown happens to determine the fault If a remote control is available monitor its display to reveal which fault is happening 2010 Magnum Energy Inc 20 Warranty Service Information Warranty Service Information 24 Month Limited Warranty Magnum Energy Inc warrants this ME SSI to be free from defects in material and workmanship that result in product failure during normal usage according to the following terms and conditions 1 The limited warranty for the product extends for 24 months beginning from the product s original date of purchase 2 The limited warranty extends to the original purchaser of the product and is not assignable or transferable to any subsequent purchaser 3 During the limited warranty period Magnum Energy will repair or replace with factory new or remanufactured replacement items at Magnum Energy s option any defective parts or any parts that will not properly operate for their intended use if such repair or replacement is needed because of product malfunction or failure during normal usage The limited warranty does not cover defects in appearance cosmetic or decorative or any structural or non operativ
21. her to make 24 volts This is known as a series battery string The other four 6 volt batteries connected together will also make another se ries battery string The negative ends of these two battery strings must be connected together Likewise the positive ends of the two battery strings must be connected together Then the two battery strings are connected together in parallel to make a single battery bank to power the stacked inverters as shown in Figures 3 and 5 CAUTION The DC negative interconnect cable provided in A N the ME SSI kit is a crucial part of the DC wiring and must be used It ensures that the negative battery terminals of both inverters are at the same voltage potential This allows proper communication of the clocking signals and helps prevent damage to the stacking ports Info If multiple battery temperature sensors are installed ensure that they are all connected to the battery bank in the same location This will help balance the charging from each charger 3 2010 Magnum Energy Inc Installation This diagram is fora 24 VDC battery system Ensure your battery bank is wired correctly MS4024 L1 inverter DC Positive and Negative Interconnects from ME SSI kit Stacker cable from ME SSI kit MS4024 L2 inverter DC disconnect and overcurrent protection E E 6 volt 6 volt 6 volt 6 volt battery battery battery batt
22. home an inverter or a generator and the neutral conductor tied to ground These Standards also require that the AC neutral be connected to safety ground often called a bond in only one place at any time often called a bond If more than one bond is established currents can circulate between neutral and ground and cause ground loop currents These ground loops can trip GFCIS and cause an electric shock hazard The fundamental difference between using an inverter in a mobile installation aS opposed to an AE installation is how the neutral is grounded in the AC system There may be multiple AC sources tn mobile installations which means there is the potential of having multiple neutral to ground connections Therefore if you are using an inverter as one of your AC sources along with another AC source i e utility power or generator you must ensure that the inverter does not also connect the neutral to ground while the other AC source is actively powering the inverter loads In AE installations the main service panel provides the neutral to ground bond for the entire electrical system not in the inverter The MS4024 inverter provides an internal relay that connects the neutral to ground while inverting and opens this neutral to ground connection automatically when connected to an active AC source such as utility power or a generator WARNING Each MS4024 inverter in a series stacked Ji configuration provides a ne
23. in the Search mode until a load ex ceeds the search watts threshold of that unit If powering 240VAC loads then the search watts sensibility is determined by combining the Search Watts setting on both units For example Given a 15 watt Search Watts setting on the L1 inverter and a 10 watt Search Watts setting on the L2 inverter and a 20 watt 120VAC load on the L1 Inverter and no load on the L2 inverter This would cause the L1 Inverter to start inverting but the L2 inverter would continue in Search mode With the same Search Watts settings a 25 watt 240VAC or greater load would cause both the L1 and L2 inverters to come on and start inverting Charger Operation Charge Mode The series stacked configuration is designed to accept 120VAC to each inverter typically from a split phase 3 wire 120 240VAC power source The HOT IN terminals of each inverter accepts one line of L20VAC each and the NEUT IN terminals of both inverters are tied together and connected to the AC power source neutral line When the AC line voltage and frequency are good to both units they both transfer and go to Charge mode and begin charging if enabled However it is not necessary for either unit to have charging enabled for the pair to operate 2010 Magnum Energy Inc 18 Operation After the series stacked pair is in Charge mode the remote will Show Charging and begin to sample the battery voltage If the voltage is 26 0 or above the units
24. inal and a ground conductor must be connected to the AC ground terminal on each inverter In most applications these input conductors originate from an AC distribution panel providing a main disconnect and circuit break ers required for each conductor connected to the HOT 1 IN input 9 2010 Magnum Energy Inc Installation on each inverter This panel referred to as the main panel also provides the neutral and ground bus for connecting the neutral and ground conductors to the inverter AC Output The AC output from each inverter when series Stacked is 120VAC from HOT OUT to NEUT OUT The inverters can be wired as a HOT 1 OUT only or HOT OUT 1 and HOT OUT 2 connected together by a jumper depending on your pass thru current requirements One inverter is wired to provide one 120VAC output L1 and the other inverter is wired to provide the second 120VAC output L2 These L1 and L2 outputs are 180 out of phase so the combination of the two out of phase 120VAC outputs will provide 240VAC The HOT OUT outputs of each inverter require a two conductor hot and neutral plus ground cable connected to a 120 240VAC Split phase distribution panel for the loads The panel referred to as the sub panel must be equipped with a 240VAC double pole circuit breaker rated at 30 or 60 amps maximum depending on which Single In Single Out configuration you are using The inverters output should be wired to this circuit breaker and
25. ing If this AC source is required an auto transformer may be used to obtain a center neutral to allow charging pass through WARNING The output of the series stacked inverters is Ji 120 240VAC when inverting however while in Charge mode AC is connected and charging pass thru the AC output voltage is determined by the input AC voltage Be aware that this voltage may be different from the inverting voltage and the connected load may not work or could be possibly damaged AC Input Each inverter requires a two conductor hot and neutral plus ground cable with the hot conductor fed by a cir cuit breaker If you decide to use the Single In Single Out 30A connection see Figures 7 and 8 each inverter would require a 120VAC hot conductor protected by a maximum 30A circuit breaker connected to the HOT 1 IN terminal The neutral conduc tor which must be sized to handle the total current capacity of the HOT 1 IN conductor must be connected to the NEUT IN terminal and a ground conductor connected to the AC ground terminal on each inverter For a Single In Single Out 60A connection see Figures 9 and 10 each inverter would require a 120VAC hot conductor protect ed by a maximum 60A circuit breaker connected to the HOT 1 IN terminal and this connection jumpered to the HOT 2 IN terminal The neutral conductor which must be sized to handle the total current capacity of the HOT 1 IN conductor must be connected to the NEUT IN term
26. nformation in this section along with the installation requirements provided in the owner s manual for your inverter to ensure a successful installation IMPORTANT Before you begin your installation e Series stacking allows two MS4024 120VAC inverters to be com bined to provide a higher AC voltage two MS4024 series stacked 8000 watts 120 240VAC Magnum also has inverters that can be installed in a configuration known as parallel stacking This configuration allows you to increase your inverter output power using a maximum of four MS PAE units For example four MS4024PAE Series inverters using the ME RTR router can be combined to provide 16 000 watts of inverter power MS4024PAE x 4 16 000 watts 120 240VAC Info The MS4024 120VAC unit cannot be reconfigured Hi to allow parallel stacking Only the MS PAE Series MS4024PAE or MS4448PAE can be paralleled stacked CAUTION All wiring must be done in accordance with local and national electrical safety standards DC Wiring The success of an inverter system installed in a series stacked con figuration is dependent on the quality and maintenance of the DC connections and proper cable sizing When inverters are stacked and required to perform optimally the DC connections must be tight and the cables must not be too long or undersized Refer to the owner s manual for your inverter to determine the required cable size and overcurrent protection device for each inve
27. ng maintenance on an inverter Always disconnect the batteries or energy source prior to installing or performing maintenance on an inverter Live power may be present at more than one point since an inverter utilizes both batteries and AC Turning off the inverter may not reduce this risk As long as AC power is connected it will pass through the inverter regardless of the ON OFF power switch setting Always verify proper wiring prior to starting an inverter Do not operate an inverter if it has been damaged Do not dismantle an inverter there are no user serviceable parts contained in this product Attempting to service the unit yourself could cause electrical shock Internal capacitors remain charged after all power is disconnected No AC or DC disconnects are provided as an integral part of the inverter Both AC and DC disconnects must be provided as part of the system installation 2010 Magnum Energy Inc ii No overcurrent protection for the battery supply is provided as an integral part of the inverter Overcurrent protection of the battery cables must be provided as part of the installation No overcurrent protection for the AC output wiring is provided as an integral part of the inverter Overcurrent protection of the AC output wiring must be provided as part of the installation IMPORTANT BATTERY SAFETY INSTRUCTIONS Wear eye protection safety glasses when working with batteries Remove all jewelry such as rings wa
28. ngle In Out SOA w 120VAC only source 11 2010 Magnum Energy Inc Installation Single In Single Out 60 Amps Using both inputs HOT 1 and HOT 2 for the input and output provides up to 60 amps AC pass thru 30 amps each line The HOT 1 line passes through the unit and also shares power with the charger The HOT 2 line passes through the unit without sharing power with the charger Use this configuration if the output from your AC source provides more than 30 amps See Figures 9 and 10 below MS4024 L1 HOT1IN HOT 1 OUT AC LOADS 120 240 HOT1IN Ul A HOT2 IN HOT 1 OUT HOT 2 OUT ig GND Figure 9 Single In Out 60A with 120 240VAC source MS4024 L1 A HOTLIN HOT 1 OUT d HOT2 IN AC LOADS 120 240 To 240V Invert only 120V Figure 10 Single In Out 60A w 120VAC source only OUT in Figures 7 through 10 represent the RD and MS AE Series models Those models have no internal relay between the NEUT IN and NEUT OUT as they are tied together Fi Info The dashed lines between the NEUT IN and NEUT Info Refer to the MS4024 Owner s Manual for information on how to connect the AC terminal 2010 Magnum Energy Inc 12 Installation Neutral to Safety Ground Bonding Electrical safety standards for wiring mobile RV boat or truck and AE houses cabin or office installations require an AC source such as the utility feed in your
29. ocked and synchronized 180 out of phase from each other to provide 240VAC This is commonly referred to as a 120 240VAC split phase or as a 240VAC single phase with a center tap neutral and is the same AC voltage configuration that most utility companies connect to houses While inverting a series stacked configuration allows you to oper ate 240VAC loads at twice the power that is available from a single inverter and the ability to provide the power of each inverter sepa rately to operate 120VAC loads While charging a series stacked configuration allows the battery bank to be independently charged up to twice the power available from a single inverter and if needed provides back up power for your 120 240VAC loads during a utility black out The ME SSI kit consists of e ME SSI Owner s Manual e Two DC interconnects cables red and black e Two DC terminal insulators red and black e Series Stacker cable Red and Black DC Interconnects Cables a a a F rl n a a a T Red and Black DC Series Stacker Cable m Terminal Insulators fe Figure 1 Series Stacking I nterface ME SSI Components 1 2010 Magnum Energy Inc Installation Installation When connecting inverters in a series stacked configuration certain installation requirements are needed to obtain optimum performance This section provides information on DC and AC wiring and con necting the stacker cable Use the i
30. rter the cable polarity at both the battery and the inverter are correct Positive must be connected to positive negative must be connected to negative Reversing the positive and negative battery cables will damage the inverter This type of damage is easily detected and will void your warranty For help against accidental shorts the ME SSI kit provides two DC terminal insulators These are to be used where both the bat tery cables and DC interconnects are connected See Figure 2 Alternately a DC Conduit Box PN ME CB or Mini Magnum Panel MMP250 60S may be used to protect the DC terminals fj CAUTION Before making any DC connection ensure 2010 Magnum Energy Inc 2 Installation DC interconnect cables positive and negative Stacker T Cable DC terminal insulators negative and positive Figure 2 ME SSI Components Connected to Stacked Pair Battery Connections for Series Stacked Inverters When inverters are series stacked they must operate from a single battery bank A single battery bank configuration helps to balance charging and discharging If your battery bank uses multiple bat tery strings i e batteries connected together in series to provide the required DC voltage ensure each battery string is connected together in parallel to form a single battery bank For example If you have eight 6 volt batteries and require a 24 volt battery bank connect four of the 6 volt batteries toget
31. tches bracelets etc when installing or performing maintenance on the inverter Never work alone Always have someone near you when working around batteries Use proper lifting techniques when working with batteries Never use old or untested batteries Check each battery s label for age type and date code to ensure all batteries are identical Batteries are sensitive to changes in temperature Always install batteries in a stable environment Install batteries in a well ventilated area Batteries can produce explosive gasses For compartment or enclosure installations always vent batteries to the outside Provide at least one inch of air space between batteries to provide optimum cooling Never smoke when in the vicinity of batteries To prevent a spark at the battery and reduce the chance of explosion always connect the cables to the batteries first Then connect the cables to the inverter Use insulated tools at all times Always verify proper polarity and voltage before connecting the batteries to the inverter To reduce the chance of fire or explosion do not short circuit the batteries In the event of accidental exposure to battery acid wash thoroughly with soap and water In the event of exposure to the eyes flood them for at least 15 minutes with running water and seek immediate medical attention Recycle old batteries SAVE ALL INSTRUCTIONS iii 2010 Magnum Energy Inc Table of Contents UE O
32. ters are connected as described in the DC Wiring section the stacker cable can be installed as follows CAUTION Ensure that no DC power is connected to the inverter and that the DC disconnect is open Locate the Stack Port on each inverter see Figure 6 2 Connect the series stacker cable from the Stack Port jack on one inverter to the Stack Port jack on the other unit 3 Once the series stacker cable is connected gently pull on the cable at both ends close to where they are plugged in to en sure both connectors are secured in place Power OA FF Charging inverting man B Stack Port ten Tene Sar red label Figure 6 Stack Port Location on MS4024 7 2010 Magnum Energy Inc Installation AC Wiring This section will discuss AC wiring that is unique to series stacking otherwise refer to you inverter s owner s manual for any other in formation on AC wiring When wiring the AC to your series stacked inverters there are many variables that must be considered for a Safe and trouble free installation The following options should be determined prior to any AC wiring Info The AC source must be connected to both il inverters An AC source connected to only one inverter in a series stacked configuration is not supported and will not work AC Input Source When an AC source is connected to the in verter s input and passing thru both inverters Charge mode the AC output of the two series sta
33. utral to ground connection creating two bonds at the same time Depending on the installation either one or both of the neutral to ground connections inside the inverter must be disconnected to prevent multiple neutral to ground connections In a mobile installation the neutral to ground connection in one of the MS4024 inverters in a series stacked configuration must be disconnected while leaving the neutral to ground connection in place in the other MS4024 inverter to allow the automatic neutral to ground switching to continue for the series stacked pair In an AE installation the neutral to ground connection in both of the MS4024 inverters must be disconnected because the neutral to ground connection is provided in the main AC panel from the inverter must be removed to prevent multiple bonds If there is an inverter sub panel separate from a main electrical panel it should have a removable wire that allows the neutral bus to be unbonded from the ground bus i WARNING Any neutral to ground bond downstream 13 2010 Magnum Energy Inc Installation Disconnecting the Neutral to Ground Connection The following instructions will guide you in disconnecting the neu tral to ground connection WARNING Fire and Shock Hazard Disconnect all AC and DC sources before working with AC wiring 1 Locate and remove the inverter s AC access cover plate 2 At the top of the AC wiring compartment locate the
34. will go into Float Charging mode If the battery voltage is below 26 0 they will go into Bulk Charging mode It is possible that if the battery voltage is close to the 25 8 26 0V threshold one charger may go to float while the other may go to Bulk Charge mode The stacked pair of chargers work independently of each other and because of this there can be some voltage regulation interac tions To handle this the charge voltage regulation routine while Stacked will sample twice as much as usual This may mean that the chargers may take a minute or two before charge current Is actually seen once AC input is first applied Once charging has started because they are independent chargers they may not Share the charge current evenly but will individually provide cur rent to the batteries up to their maximum current rating which is the maximum Charge Amps or Input Shore Amps setting which ever is less Any power required for battery charging will be in addition to any AC loads being powered while AC input is present to the inverters to balance the total current provided to the batteries During Absorption or Float Charging the current will differ While in Charge mode if either unit senses a loss of AC input power both units will transfer from Charge to Inverter mode Once this transfer is made 120VAC is available from each individual inverter and 240VAC is available across the HOT OUT terminals of the stacked pair
35. you will not be able to power any 240VAC loads voltage from L1 to L2 will be zero Once the AC source is disconnect ed and the inverters again start inverting you can reconnect your 240VAC loads See Figures 8 and 10 e Three phase with neutral This AC source typically has three 120VAC lines a neutral and a ground The output of each line is 120 out of phase from each other so the voltage from one line to another is 208VAC and the voltage between 2010 Magnum Energy Inc 8 Installation each line and neutral is 120VAC When three phase power is connected to the HOT 1 IN of each inverter one line to one inverter and a different line to the other inverter and passing through the inverter Charge mode the incoming power is Shared with the charger The voltage between each HOT 1 OUT and neutral will be 120VAC and between the inverters two HOT 1 OUT lines it will be 208VAC If this AC source is used you must remember that you may not be able to power any 240VAC loads voltage from L1 to L2 will be 208VAC until the AC is disconnected and the inverters again start inverting e 240VAC only The input of the series stacked system re quires either 120VAC from hot to neutral or 120 240VAC with a common center neutral provided between the L1 and L2 lines If a 240VAC only AC source is connected to the AC HOT input on the two inverters without a center neutral the inverters will not recognize the AC source nor allow charg
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