Programmable Solar Charge Controller with Nightlight
Contents
1.2. 8 signal wires The Solara SRCX controller comes with a sophisticated nightlight function It controls the load output at night and is widely programmable There are 2 modes available DUSK TO DAWN and EVENING MORNING The mode can be selected in Programming Menu 3 Ys Ke Light on Dusk to Dawn Light off Evening Timing Mid of night Morning Timing Light on Light off Number time to mid of night Number of hours time after mid of night Ya If EVENING MORNING is selected allows choosing the MORNING timing behaviour and allows choosing the EVENING timing behaviour Mind that the load output is switched off as soon as the battery has reached the Low Voltage Disconnect threshold The Low Voltage Disconnect has priority above the nightlight function Mid of night is detected automatically as the middle between dusk and dawn no real time setting is required It may take some days until the controller has learnt midnight This method can cause some inaccuracy but avoids any clock readjustment The controller s Mid of night can be different from the real time midnight depending on your location Programmable Solar Charge Controller with Nightlight Function Solara SRI 70CX SR340CX User Manual English Page 2 Nightlight Function continued The controller recognizes day and night based on the solar array open circuit voltage In this day night threshold can be modified accord
3. to shut off the load output Connect the wires leading to the loads with correct polarity Mind the recommended wire size Solara SR170CX min 2 5 mm Solara SR340CX min 4 mm 6 T Fasten the strain relieves If you intend to use the Excess Energy Management output follow these steps a Remove the green terminal block in the terminal compartment and turn it upside down b Mount the excess energy signal wires as shown in the picture beside c Connect the signal wires to the excess energy management input of the appropriate load e g special solar coolers d Reconnect the green terminal block to the Solara SRCX Close the terminal lid Now you have successfully connected your Solara SRCX controller Grounding the Solar System Be aware that the positive terminals of the Solara SRCX controller are connected internally and therefore have the same electrical potential If any grounding is required always do this on the positive wires REMARK If the Solara SRCX is used in a vehicle which has the battery negative on the chassis loads and solar panels connected to the regulator must not have an electric connection to the car body Otherwise the overcharge protection the Low Voltage Disconnect and the electronic fuse function of the controller is short circuited Self Test As soon as the controller is supplied with power either from the battery or the solar array it s
4. using fire or any naked flame Make sure that the battery room is ventilated Avoid touching or short circuiting wires or terminals Be aware that the voltages on specific terminals or wires can be up to double the battery voltage Use isolated tools stand on dry ground and keep your hands dry Keep children away from batteries and the charge regulator Please observe the safety recommendations of the battery manufacturer If in doubt consult your dealer or installer The manufacturer shall not be liable for damages especially on the battery caused by use other than as intended or as mentioned in this manual or if the recommendations of the battery manufacturer are neglected The manufacturer shall not be liable if there has been service or repair carried out by any unauthorised person unusual use wrong installation or bad system design Opening case voids warranty Equalization voltage 14 8 29 6 V 25 C 2h Load disconnect 11 0 12 2 22 0 24 4 V depending on voltage setting Load reconnect voltage 12 8 25 6 V Temperature 4 mV cell K compensation Max solar panel current 10 20 A according to model number 25 C without load current at 50 C 10 20 A according to model number 25 C without solar current at 50 C Self consumption AmA Ambient temperature 25 to 50 C range Case protection Max load current IP 22 Subject to change without notice Version Solara SRCX Made in one of the followin
5. Programmable Solar Charge Controller with Nightlight Function Solara SRI 70CX SR340CX User Manual English Page Dear Client Thank you very much for buying a Solara product With your new Solara SRCX controller you own a state of the art device which was developed according to the latest available technical standards It comes with a number of outstanding features like Multifunctional LC display Programmable Low Voltage Disconnect with new ALVD Adaptive Low Voltage Disconnect Sophisticated programmable nightlight function Excess Energy Management EEM for better utilization of your solar system Complete electronic protection This manual gives important recommendations for installing using and programming as well as remedies in case of problems with the controller Read it carefully in your own interest and mind the safety and usage recommendations at the end of this manual a The charge controller protects the battery from being overcharged by the solar array and from being deep discharged by the loads The charging characteristics include several stages which includes automatic adoption to the ambient temperature The charge controller adjusts itself automatically to 12V or 24V system voltage The pushbutton allows switching the load on and off The charge controller can be programmed for lighting applications The controller provides a control output for special loads that make use of excess energy like special solar r
6. W Fd x current compensated xX a Vv 11 4 11 9 V eo Low voltage disconnect b gt bi 24 current compensated Short push v 11 0 11 75 V lt 1 Second b LVD current compensated 5 2s adaptive 11 0 12 2 V v Long push Ry gt 1 Second g Low voltage disconnect 1L5V Ff uw Low voltage disconnect oe 11 0 V Yy gt gt A B d tpe Sg Q Nightlight function OFF 3 oe ay s x lt 4 v py Nightlight function Du SK TO DAWN v g Nightlight function D7 EVENING MORNING v M gt Nightlight function 4 gt l HE ake EVENING OFF x a v ue Nightlight function f s gt EVEN H y __ ee Nightlight function ote EVEN 24H Vv oie Nightlight function f oe EVENING 3 HRS Vv we Nightlight function Pid EVEN H v A Nightlight function eu EVENING 5 HRS v om P Nightlight function EVENING s 0 4 HRS before mid of night y a Nightlight function EVENING gt 0 3 HRS before mid of night ae Nightlight function EVENING an O 2 HRS before mid of night Vv ry Nightlight function EVENING e re O 1 HR before mid of night Y 1 Nightlight function EVENING Digs mid of night v M gt gt Nightlight function a 6 age id 5 f K A RAA MORNING Ol x a y wee Nightlight function x MOI H v oe Nightlight function 24 MORNING 2 HRS v ors Nightlight function f Pis MORN HRS Y Nightlight function Niel MORN HRS v Re Nightlight function Oud MORNING 5 HRS v ome Nightlight function MORNING x FROM 2 HRS after mid of night y oe Nig
7. efrigerators Additionally it has a serial interface which can be used with an optional interface adapter Solara SRCX l a The charge controller has a number of safety and display functions The regulator is intended for indoor use only Protect it from direct sunlight and place it in a dry environment Never install it in humid rooms like bathrooms The regulator measures the ambient temperature to adopt the charging voltages therefore it must be installed in the same room as the battery The regulator warms up during operation It shall be installed on a non flammable surface only REMARK Connect the controller by following the steps described below to avoid installation faults Open the terminal lid gt al Remove the screws from the strain relief and take off the strain relief bridges a a Mountthe controller to the wallwith _ screws that fit to the wall material Use screws with 4 to 5 mm shaft and max 9 A mm head diameter no counter sunk gt 10cm Mind that the screws have to carry also ae the force applied by the wiring Mind also the minimum required distance to floor and ceiling this is necessary for ventilation reasons A DIN Rail mounting plate is available as an accessory Solara SRCX DR This allows mounting the controller on a A standard 35mm DIN rail Use the screws gt 10cm supplied with the mounting plate to fixit 74 to the controller a Connect the
8. g countries China Germany SOLARA Hamburg www solara de CE Main Menu SOLARA Programming Menu flashing State of Charge isplay Menu Setting Factory our gt aad 4 attery type Df A gt F 4 lt be Pars 3 S liquid electrolyte x lt se HI Battery typ e A us GEL VRLA Load on of 2 r z Low voltage disconnect 2 pi 3
9. htlight function MORNING ote FROM 3 HRS after mid of night v Nightlight function MORNING x FROM 4 HRS after mid of night Vv Nightlight function MORNING Ded FROM 5 HRS after mid of night Yv eo Nightlight function MORNING o FROM 6 HRS after mid of night v Pw gt gt ay Night thresho 6 kA lt f K 1 0 2 0 V Solar voltage a Yy bk Xy lay Night thresho afa 1 6 3 1 V Solar voltage v Oy lay Night _thresho l oe 2 1 4 2 V_ Solar voltage v lay Night thresho a 2 7 5 4V Solar voltage v ki ay Night thresho SE 3 2 6 5 V Solar voltage v ose lay Night thresho K 3 8 7 6 V Solar voltage v ras ay Night thresho F pi 4 4 8 8V Solar voltage Vv lay Night thresho R 4 9 9 8 V Solarspannung gt v lay Night thresho BUA a 5 5 11 0 V Solar voltage Yv s1 ay Night thresho e 6 0 12 1 V Solar voltage v oe lay Night thresho here 6 6 13 2 V Solar voltage T lay Night thresho ee 7 2 14 3V Solar voltage a F x lay Night thresho e we 7 7 15 4V Solar voltage v 7 f r gt 4 6 2 A b uzzer ON te r ve x Vv yo uzzer OFF s gt v gt Serial interface EXCESS 8 SW eo E OR ENERGY amp CURRENT DATA a y we Serial interface EXCESS Fg os ENERGY amp DATALOGGER v oa Serial interface sg a P04 DIRECTIONAL NO EXCESS x 9 v ENERGY s Lp eep individual settings Date of your t rA us ue eep individual settings an ets eset to factory preset
10. inal No connection _ Unrestricted Unrestricted Unrestricted See Le eae es es Controller switches off load ARNING The combination of different error conditions may cause damage to the controller Always remove an error before you continue connecting the controller Load will reconnect as soon as battery is recharged Battery is low Switch off all loads Remove short circuit Controller will switch on load automatically after max 1 minute Overcurrent Short circuit of loads Check proper ventilation of controller After cooling down the loads are reconnected automatically Controller is thermally overloaded and has disconnected the loads Loads are not supplied Check if other sources Battery voltage too high gt 15 5 31 0 V Battery wires or battery fuse damaged battery has high resistance overcharge the battery If not controller is damaged Check battery wires fuses and battery Display Reason Battery is flat ne Battery has low ue after short time capacity No up Battery is not Solar array being charged moving faulty or wrong during daytime bars polarity Battery is connected with reverse polarit Controller is thermally overloaded Solar array exceeds nominal current of controller Change battery Check Solar array and wiring Remove reverse polarity Permanent sound Battery wrong polarity Moun
11. ing to the requirements of the local conditions and the solar array used l l we VK Threshold setting range 7 71 15 4V ose z Switching point day gt night Switching point night gt day 4 9 9 8V factory setting 1 0 2 0V gt Curve of open circuit voltage solar array The two voltage levels before after the slash are valid for 12 V and 24 V systems respectively To find the right value we recommend measuring the solar array open circuit voltage at the time when twilight has reached the level when the controller should switch on off This value the closest available can then be set according to the description in the programming section The controller has an acoustic signal which indicates the change of the state of charge This function can be deactivated in Menu 7 The controller comes with a serial interface which can be connected to a PC with an optional interface adapter Solara SRCX l see interface adapter manual for details In the behaviour of the serial interface can be modified The controller is protected against wrong installation or use At the battery At the solar terminal At the load terminal terminal Unrestricted Normal operation Unrestricted Unrestricted pares Go _lUnrestricted Acoustic Warning connected with wrong polarity Reverse polarity Unrestricted Controller limits Controller switches off load term
12. ly if you install additional loads In normal operation mode the controller displays the state of charge available energy of the battery Any change of the state of charge SOC to a lower status is additionally signalled acoustically System conditions are displayed as follows gt 80 60 80 35 60 10 35 lt 10 Load Disconnect We gate LOM PLO eo eek ee Q o Qi Flashes H 1x x The percentage corresponds to the available energy until Low Voltage Disconnect in relation to a fully charged battery As long as the solar array supplies enough voltage to charge the battery this is indicated by up moving bars alternately to the state of charge display In normal operation the loads can be switched on and off by pushing the button This is indicated in the display Load Load manually ON manually O FF U Special conditions are shown in the LC display if the Low Voltage Disconnect function shuts off the load output or in case of various other error conditions See section ERROR DESCRIPTION for details The controller has 5 different modes to protect the battery from being deep discharged Mode 1 Disconnect at 11 4 V at nominal load current up to 11 9 V at no load current Normal operation mode for good battery protection Disconnect at 11 0 V at nominal load current up to 11 75 V at no load current Mode with lower disconnection point Battery is c
13. t controller at a location with better ventilation Controller limits solar current Check solar array current You enter the programming mode with a long push on the button The programming menu structure is described in the right column Mind that once you have entered the programming menu you can exit it at the last item only We therefore recommend that you first note down your required settings in the check boxes beside the menu structure and then do the programming in one go This makes programming easier and avoids errors All programming settings are stored in a non volatile memory and remain stored even if the controller was disconnected from the battery If you want to reset the controller to the factory settings choose Programming Menu 9 By pushing the button for 8 sec in normal operation mode the programming lock out is activated to prevent any accidental settings change Another 8 sec push releases the lock out Intended Use The charge regulator is intended for use in photovoltaic systems with 12 V or 24 V nominal voltage It shall be used with vented or sealed VRLA lead acid batteries only Safety Recommendations Batteries store a large amount of energy Never short circuit a battery under all circumstances We recommend connecting a fuse slow acting type according to the nominal regulator current directly to the battery terminal Batteries can produce flammable gases Avoid making sparks
14. tarts a self test routine This is indicated first by running LCD bars for approx 0 5 seconds and then the firmware version is disolayed in coded symbols for about another second this is for service purposes only Then the display changes to normal operation System Voltage The controller adjusts itself automatically to 12 V or 24 V system voltage As soon as the voltage at the time of start up exceeds 20 0 V the controller implies a 24 V system If the battery voltage is not within the normal operation range approx 12 to 15 5 V or approx 24 to 31 V at start up a status display according to the section ERROR DESCRIPTION occurs Battery Type The controller is preset to operate with lead acid batteries with liquid electrolyte If you intend to use a VRLA battery GEL type you can adjust the controller in see back page The equalization charge is deactivated then In case of any doubts consult your dealer The regulator warms up during normal operation If there is insufficient ventilation e g in an installation cabinet the controller limits the solar charge current to prevent overheating SOLARA The regulator does not need any maintenance or service Remove dust with a dry tissue It is important that the battery gets fully charged frequently at least monthly Otherwise the battery will be permanently damaged A battery can only be fully charged if not too much energy is drawn during charging Keep that in mind especial
15. wires leading to the battery with leading to the battery with correct polarity To avoid any voltage on the wires first connect the controller then the battery Mind the recommended wire length min 30 cm to max approx 100 cm and the wire size Solara SR170CX min 2 5 mm Solara SR340CX min 4 mm Wrong polarity will cause a permanent warning NING If the is connected with reverse polarity the load terminals will m sah the wrong polarity Never connect loads during this condition REMARK The controller has a built in voltage drop compensation which automatically compensates battery wire voltage drops of up to 250 mV REMARK Mind the recommendations of your battery manufacturer We strongly recommend connecting a fuse directly to the battery to protect any short circuit at the battery wiring The fuse must take the charge controller nominal current olara SR170CX 15A Solara SR340CX 30A Connect the wires leading to the solar array with correct polarity To avoid any voltage on the wires first connect the controller then the solar array Mind the recommended wire size Solara SR170CX min 2 5 mm Solara SR340CX min 4 mm REMARK place positive and negative wire close to each other to minimize electromagnetic effects REMARK Solar panels provide voltage as soon as exposed to sun light Mind the solar panel manufacturer s recommendations in any case 6 To avoid voltage at the load terminal push the button
16. ycled deeper this can shorten battery lifetime Disconnect at 11 0 V to 12 2 V depending on load current and previous charging cycles This adaptive mode leads to longer lifetime of the battery because it allows recovery of the battery by full recharge Maximum battery life Disconnect at 11 5 V fixed setting Appropriate if bypass loads draw current directly from battery Disconnect at 11 0 V fixed setting Appropriate if bypass loads draw current directly from battery Mode with lower disconnection point Battery is cycled deeper this can shorten battery lifetime The controller is preset to Mode 1 from the factory Use Programming Menu 2 to change the setting see back page In case of doubts which mode to choose consult your dealer because this has to be evaluated depending on the battery used Mode 2 Mode 3 Mode 4 Mode 5 The controller provides a built in excess energy management function This function in combination with especially designed loads e g special solar refrigerators coolers allows to make use of excess energy which would be lost otherwise because of the overcharge protection of the battery A better utilization of the solar system is the benefit Also the battery treatment is improved because more energy comes directly from the solar panel instead of the battery Ask you dealer about available loads that can make use of excess energy To connect your Excess Energy load with the controller see picture
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