User manual SMLNL English
Contents
1. Saip Saip SMLNL Solar Charge Controller with Programmable Nightlight Function User Manual English Dear customer Thank you very much for buying this Saip product Please read the instructions carefully and thoroughly before using the product 01 With your new SMLNL 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 such as m Clear readable display of the state of charge and programmable nightlight function m Detects day and night using the PV array E Programmable Nightlight Function E Low voltage disconnected regulated by state of charge or voltage 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 Description of Functions E 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 include automatic adaptation to the ambient temperature m The charge controller adjusts itself automatically to 12V or 24V system voltage m The push button allows programming nightlight function E The charge controller can be programmed2. min 6mm2 SML15NL SML2ONL min 10mm 2 05 Grounding the Solar System Be aware that the positive terminals of the SMLNL 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 device is used in a vehicle which has the battery negative on the chassis loads connected to the regulator must not have an electric connection to the car body Otherwise the Low Voltage Disconnect function and the electronic fuse function of the controller are short circuited Starting up the Controller Self Test As soon as the controller is supplied with power either from the battery or the solar array it starts a self test routine Then the display changes to normal operation System Voltage 06 The controller adjusts itself automatically to 12V or 24 V system voltage As soon as the voltage at the time of start up exceeds 20 0V the controller implies a 24V system If the battery voltage is not within the normal operation range ca 12 to 15 5V or ca 24 to 31V 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 lead acid battery with solid electrolyte gel type or fleece type you can adjust the charging characteristics see Settings The equal
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4. a system problem Short pushing the button will light up the lamp which is connected to the load terminals The lights will be on in the day for 3 minutes intervals Within 3 minutes the lights can be turned off via pushing button The lights can turned on repeatedly with pushing button besides when the system is in LVD load disconnect red LED on In LVD this testing function is not valid If pressing the button cause a load disconnects LVD the light will turn off 15 Programming Lock out 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 General Safety and Usage Recommendations Intended Use The charge controller is intended exclusively for use in photovoltaic systems with 12 V or 24 V nominal voltage and in conjunction with vented or sealed VRLA lead acid batteries only Safety Recommendations m 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 controller current directly to the battery terminal m Batteries can produce flammable gases Avoid making sparks using fire or any naked flame Make sure that the battery room is ventilated m Avoid touching or short circuiting wires or terminals Be aware that the voltages on specific terminals or wires can be up to double
5. for solar lighting application E The charge controller has a number of safety and display functions Mounting and Connecting The controller 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 02 The controller measures the ambient temperature to determine the charging voltage Controller and battery must be installed in the same room The controller warms up during operation and should therefore be installed on a non flammable surface only REMARK Connect the controller by following the steps described below to avoid installation faults Mount the controller to the wall with screws that fit to the wall material Use screws with 4 mm shaft and max 8 mm head diameter no counter sunk Mind that the screws have to carry also the force applied by the wiring Make sure that the ventilator slits on the sides are unobstructed A DIN Rail mounting plate is available as an accessory CX DR2 This allows mounting the controller on a standard 35mm DIN rail Remove the screws at the backside of the controller and screw the mounting plate with the long fastening screw onto the backside of the controller 03 Connect the wires 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 1
6. 00 cm and the wire size SMLOSNL min 2 5 mm2 SMLO8NL min 4 mm SML1ONL min 6 mm2 SMLI5NL SML20NL min 10 mm 2 Wrong polarity will cause a permanent warning sound a WARNING If the battery is connected with reverse polarity the load terminals will also have the wrong polarity Never connect loads during this condition 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 SMLO5NL 20A SMLO8NL 20A SML10NL 30A SML15NL 30A SML20NL 40A 04 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 SMLOSNL min 2 5 mm2 SMLO8NL min 4 mm SML10NL min 6 mm SML15NL SML2ONL min 10 mm 2 ty 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 Connect the wires leading to the loads with correct polarity To avoid any voltage on the wires first connect the wire to the load then to the controller Mind the recommended wire size SMLOSNL min 2 5mm2 SMLO8NL min 4mm2 SML1ONL
7. al operation mode for good battery protection 2 Voltage controlled Disconnect at 11 0 V fixed setting Appropriate if bypass loads draw current directly from the battery 10 The controller is preset to Mode 1 from the factory Changing the mode setting is described below In case of doubts which mode to choose consult your dealer because this has to be evaluated depending on the battery used Settings The controller can be configured for special operation For this purpose open the cover of the controller by removing the screws on the back side WARNING The controller should not be opened while connected and in operation When the controller is opened there are 2 jumpers on the electronic board For changing put the jumper either on both contact pins or only on one contact pin Closed jumper Open jumper 11 With these jumpers the following settings can be configured Jumper GEL 1 LVD 2 E Function of low unction Battery type voltage disconnect Setting Liquid State of charge jumper open electrolyte controlled Setting jumper GEL VRLA Voltage controlled closed battery Jumper open Jumper open Fact ia liquid state ofcharge electrolyte controlled After completing the setting replace the cover and tighten it with the screws Safety Features The controller is protected against improper installation or use At the solar termi
8. circuit Controller will switch on load automatically after max 1 minute not supplied Battery voltage too high gt 15 5 31 0 V Check if other sources lovercharge the battery If not controller is damaged Battery wires or battery fuse damaged battery has high resistance Check battery wires fuses and battery Battery is empty after d a short time LED is on Battery has low capacity Change battery Red LED on 14 Error Display Reason Remedy A Solar arra Battery is not faulty ae Remove faulty being charged s connection wrong polarit during the day LED is off Green TED off reverse polarity Programming Nightlight Light Function You enter the programming mode with a long push on the button The programming menu structure is described on the follow page 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 besides 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 Testing Function During the daytime the testing function of SMLNL can help the user to verify correct installation or for troubleshooting
9. d terminal which is prepared for nightlight operation and switches on for a selectable number of hours from the dusk Dusk is recognized of the open circuit voltage of the solar array is lower than the setting of the controller There are 2 modes available Dusk to Dawn and Evening Mode The mode can be selected in Programming Menu 1 wy Va Wwe ee ee to Dann Ligh off Evening Mode gt on Light off If EVENING mode is selected Programming Menu 2 allows choosing the EVENING timing hours Mind that the load output is switched off as soon as the battery 09 has reached the Low Voltage Disconnect threshold The Low Voltage Disconnect has priority above the nightlight function The controller recognizes day and night based on the solar array open circuit voltage In Programming Menu 3 this day night threshold can be modified according to the requirements of the local conditions and the solar array used gt 1 Ko 4 gt Curve of open circuit voltage solar array Both state changes require several minutes of continuous transition values before making the change These restrictions avoid false transitions due to dark storm clouds or lightning Low Voltage Disconnect Function LVD The controller has 2 different modes to protect the battery from being deeply discharged 1 State of charge controlled Disconnect at 11 4 V at nominal load current up to 11 9 V at no load current Norm
10. ization charge is deactivated then In case of any doubts consult your dealer Recommendations for Use The controller warms up during normal operation The controller 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 especially if you install additional loads Display Functions The controller is equipped with 5 LEDs and an acoustic warning signal 07 o Charge display State of charge display o 0O lt ce Mf E 000000 Load status display In normal operation the controller shows the state of charge of the battery and the charge from the solar panels Charge display Solar array supplies Solar array does not supply electricity LED on electricity LED off State of charge display gt 75 25 75 lt 25 08 The percentage corresponds to the available energy until Low Voltage Disconnect in relation to a fully charged battery Load status display In case of deep discharge or overload short circuit of load the load output is switched off This is indicated by Overload or Short circuit of load LED flashing Normal operation Low voltage LED off disconnect LED on Night light Function The charge controller has a loa
11. nal At the battery terminal At the load terminal Battery connected with correct polarity Unrestricted Normal operation Unrestricted Reverse polarity Yes not at 24V system voltage Yes if only the battery is connected Acoustic Warning Load output is protected but loads might be damaged 12 At the solar At the battery At the load terminal terminal terminal Unrestricted ee y CAUTION Short circuit y i Unrestricted Battery must Unrestricted be protected by fuse Controller Overcurrent No protection switches off load terminal Thermal oral Toe ae No protection Sci No protection Reverse current Unrestricted sr te Controller Overvoltage VASE BONE Max 40 V switches off load 2 33 terminal Controller Controller Normal Undervoltage A switches off switches off load operation i load terminal terminal WARNING The combination of different error conditions may cause damage to the controller Always remove the error before you continue connecting the controller 13 Error Description Error Display Reason Remedy 14 0 3 LED is on Battery is low Red LED on Load will reconnect as soon as battery is recharged LED is Loads are flashing Overcurrent Short circuit of loads Red LED flashing Switch off all loads Remove short
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13. the battery voltage Use isolated tools stand on dry ground and keep your hands dry m Keep children away from batteries and the charge controller m Please observe the safety recommendations of the battery manufacturer If in doubt consult your dealer or installer 16 Liability Exclusion 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 unauthorized person unusual use wrong installation or bad system design 17 Technical Data Nominal voltage 12 24 V automatic recognition Boost voltage 14 5 29 0 V 25 C 2h Equalization voltage 14 8 29 6 V 25 C 2h Float voltage 13 7 127 4 V 25 C Low Voltage Disconnect Function 11 4 11 9 22 8 23 8 V controlled by state of charge 11 0 22 0 V controlled by voltage Load reconnect voltage 12 8 25 6 V Temperature compensation 4 mV cell K Max solar panel current 5 8 10 15 20 A according to model number 50 C Max load current 5 8 10 15 20A according to model number 50 C Dimensions 80 x 100 x 32mm w x h x d Weight 180gr Max wire size 16 mm AWG 6 Self consumption 4 mA Ambient temperature rangel 40 to
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