To access this option, go to Your Orders and choose Get product support. There are in fact two data to take into account: the circuit voltage (Voc) and the short-circuit current (Isc). Also, add a buffer to ensure you have enough You dont need a charge controller with small 1 to 5 watt panels that you might use to charge a mobile device or to power a single light. How to choose a Solar Charge Controller. Adding a MPPT solar charge controller to your off grid solar system, it not only protects your battery bank, but it also gives a boost to the power produced in your solar system. Thanks to the Solar Charge Controller calculator, you will be able to size your Solar Charge Controller for your solar panel setup. Lets look at how each works. WebThe Charge Controller Unit must be turned on or off using the Remote or a third-party display using the appropriate RVC commands. 22.5 volts per panel x 2 panels in each series = 45 volts going to the charge controller This means that you will need a charge controller with a maximum voltage of at least These technologies are both good options when it comes to effectively charging your battery. Buy Renogy's Rover 40 Amp MPPT Solar Charge Controller. Features: *30A Solar Charge Controller: Build-in industrial micro controller, automatically manage the working of solar panel and battery in solar system. This allows for safe heat dissipation along with protection from normal wear and tear. The charge controller reduces overall system maintenance and prolongs the life of your battery. Rover Li 30 Amp MPPT Solar Charge Controller . The larger the solar array you have (like 420 Watts +) the larger you will want your charge controller to be. Second, then connect your solar panel to There are two main types of charge controllers to consider: A solar charge controller( or regulator, as they are sometimes known) is an essential part of every solar charging kit. The Renogy Wanderer-Li is a 30A PWM solar charge controller that integrates efficient PWM charging to increase battery life and improve system performance. REDUCING THE VOLTAGE OF YOUR SOLAR PANEL Types of Solar Charge Controller. To choose the right solar charge controller for your system, you only need to take care of two things:voltageCurrent ca. Solar charge controllers are available in three technologies PWM, MPPT, and Simple 1 or 2 stage controllers. The maximum possible current that a Solar The main role of a Regulators can have 12, 24 or 48 volts and their amperage varies between 1 MPPT can fully exploit a system with a higher voltage than the battery bank. According to the scale of the power station, choose different models and capacities for the selected pwm solar charge controller. To select the proper Charge Controller, you have to know the maximum output current of the solar panel and Battery Voltage. Typically, yes. (Applies to both PWM and MPPT controllers) This is usually conservative because in most locations the solar panels will put out fewer watts than their rating. 2 Identification of Parts. Protect your 12 volt lead-acid or gel cell battery from overcharging and deep discharging with this 30 amp solar charge controller. You can choose two modes: - The Easy Mode: This is if you want a fast response without filling in all details of your panel's array. The main function of the controller is to protect and automate battery charging. While a good PWM controller may cost you $75 $150, expect to pay $400 and up for a quality MPPT controller. MPPT charge controllers can shift voltages in order to optimize the output of yoursolar panels. Add a Protection Plan: Power 48V 5000W Single Phase 240V Off-Grid Solar Inverter Charger,48V DC to 240V AC Pure Sine Wave Inverter,100A MPPT Solar Charge Controller,450V Max PV Input,Parallel Operation. It is used to regulate the amount of current that flows into your battery bank. You will find this information in the product sheet, in the manual or Therefore, we should choose a cable that is not very thin, and the length of the cable should also be moderate. WebThere are charge controllers as small as 10 amps up to 100 amps or more. There are in fact two data to take into account: the circuit voltage (Voc) and the short-circuit current (Isc). Monitor battery voltage. By adding the BT-1 to the Wanderer-Li, you can now use the smartphone app, DC Home, to monitor and adjust your solar system remotely. The off-grid solar system includes the solar panels, charge controller, batteries, inverter, Bluetooth module, and wirings. Include. It does this in multiple ways: 1. Maximum Power Point Tracking (MPPT) Guessing from the name, this technology is built for larger systems where the solar panels voltage is significantly higher. Compare PLUS $139.99 Choose Options Quick View Choose Options 100 Watt 12 Volt Monocrystalline Solar Panel (Compact Design). Then, divide the total watts by the voltage of your solar battery bank to determine amps. %cardName% ${cardName} not available for the seller you chose The controller detects when the battery voltage is too low. Usually, when you buy the solar panels, you will have all the parameters correspondingly. Choosing a charge controller for a single solar panel is quite simple. Battery Max. 3 Installation. You will want to choose one that is capable of handling the full current potential of your solar Tuesday, August 23, 2022; Terms and Conditions; Screw the wires tightly into the charge controller. To choose the right PWM solar charge controller for your system you have to calculate the maximum current that your solar array can generate. And for many solar power users a safety margin is not necessary. What is a Solar Charge Controller? We recommend an MPPT charge controller for lithium batteries. WebWhat is a Solar Charge Controller? You must decide whether the MPPT benefit is worth the added expense. x w Solar Panels wired in a s p configuration will result in those Watts being delivered to the charge controller at V when the temperature drops to the low temperature as previously defined.. Once the Charge Controller Converts those V from the solar array down to the ~ V necessary to charge a V battery bank, the charge controller will be putting out A to How to choose a Solar Charge Controller. We use a simple formula: Nbr Panel * Watt per Panel / Battery Voltage. The Conext MPPT 60 150 is a photovoltaic (PV) charge controller that tracks the maximum power point of a PV array to deliver the maximum available current for charging batteries. When picking a controller there are a few steps that you must follow to makesure that you get the right controller for the job. WebThe Renogy 10A Wanderer solar fee controller integrates reliable PWM charging to boost battery life and also boost system performance. It is the key to a photovoltaic energy storage system. With the inclusion of the Lithium Battery Mode, the 30A negative-ground controller is now capable of charging various 12V battery types and banks, including most 12V lithium models available on the market. WebAn MPPT charge controller is basically a DC to DC converter, an electronic circuit or electromechanical apparatus that transforms a direct current (DC) source from one voltage level to another. In a large PV system, you may need to connect multiple Most PWM controllers PV input : voltage . Choosing a charge controller with a single solar panel is quite simple. Solar charge controllers are an essential part of any off-grid solar panel system as they protect the battery from overcharging. In order to check if the charge controller works for your system, divide the total wattage of your solar array by the voltage of your battery bank.For example, a 2000W solar If you are wiring your batteries for 12 volts you need a charge controller that is rated at 12 volts. What needs to be determined when choosing between PWM and MPPT solar charge controller is which best suits your WebSolar Charge Controller Basics ,What Size Solar Panel and Controller Is Needed For Lithium Ion ,Solar Charge Controller Sizing and How to Choose One,What Size Charge Controller For a 300 Watt Solar Panel ,,Solar Panels: What Size of Charge Controller Do I Using a PWM controller on those will produce half the potential power output. Include. Choose Mounting Locationplace the controller on a vertical surface protected from direct sunlight, high temperatures, and water. The choice to go the MPPT route is yours to make. Connecting those to a 12-volt battery using a PWM controller will run the panel at around 15 volts. If you use a PWM controller, it will reduce the solar panels voltage until it matches the battery. PV input : voltage . As for the batteries, the same principle applies. Solar charge controllers are an essential part of any off-grid solar panel system as they protect the battery from overcharging. Charge controllers are sized based on the current and voltage of your solar array and battery. 5 Wanderer Protections. TYPE The main factor is the type of controller. Choose Options Rover Li 30 Amp MPPT Solar Charge Controller. The series has Compare CAD $389.99 Choose Options Quick View Choose Options 50A 12V dcc50s DC-DC On-Board Battery Charger with MPPT ROVER ELITE 40A MPPT SOLAR CHARGE CONTROLLER ; System Voltage : 12V/24V Auto Recognition (for non-lithium batteries) Battery Rated Tips for selecting a solar charge controller A solar charge Always check the specifications on your charge controller and solar panels. Some high end charge controllers can work with up to 5 solar panels in a series per string. They also have a higher VOC limit and are ideal for large scale solar systems. WebSizing Of Charge Controller : Choosing the most suitable charge controller requires two steps: 1. Considering these values, you have to choose a solar charge controller that supports these voltages. We have 360 watts of solar on our roof, and that works with a 30 amp solar charge controller. Battery Max. adjustable parameter. WebR 13,518.30 incl. It does this in several ways: 1. 3. Turn the charge controller on: it should be able to measure the charge of the battery. VAT. Choosing a charge controller with a single solar panel is quite simple. To access this option, go to Your Orders and choose Get product support. WebUser Manual of MPPT Solar Charge Controller . DO YOU ALWAYS NEED A SOLAR CHARGE CONTROLLER? provided adequate ventilation to dilute any hydrogen gas that will be producedmade sure any nearby sources of sparks or ignition are removed; has turned off any DC electrical devices that could be damaged by the much higher charging voltagechecked fluid levels in each battery cellMore items The voltage and the amperage are usually the first things that you have to check about a controller. This is done by multiplying the short-circuit current of your whole solar array by 1.25 (NECs safety factor). However, if you live in a location The best way to charge solar lights is with sunlight. What is the most important factor in choosing the perfect solar charge controller for your project in Nigeria? You have solar panels connected in a series at 41V each. Shop for yours now. Anything beyond that, and you do. The Tools and Materials RequiredThe Method of Connecting the Solar Panels to your Solar Charge Controller Step 1: Hook up the battery to your solar charge regulator. Why is It Essential to Connect the Solar Panels to a Charge ControllerMore items Voltage Selection : The charge controller voltage shall be matched with the system voltage. system . Pair it with our BT-1 the BT app through bluetooth and you can monitor and adjust your solar system directly from your phone. It is used to regulate the and contrary to the typical charge controller, this type of booster must connect conversely, connect the solar panel to the controller first.. WebRover 60Amp MPPT Solar Charge Controller 12V/24V/36V/ 48V . However, even if you dont have access to direct sunlight, you can still charge your solar lights in other ways. In overcast or winter weather, you can easily charge solar lights with indirect sunlight. WebA solar charging controller (or sometimes called a regulator) is an important part of every solar charging kit. The EPEVER 40A Solar Controller is going to run most solar systems and provide the best possible results. First, the battery should be hooked up to the charge controller with tray cables. When choosing a solar charge controller, you should consider the size of the load concerning how many amps the charge controller can handle. *LCD Display: clearly indicate the status and data, it can be conveniently switched modes and parameter configuration, parameters adjustable, suitable for home, industrial, commercial etc. Size and Weight: Make sure the charge controller is small and lightweight enough to be portable without too much space. This solar charge controller or "charge regulator" is capable of handling a solar cell array voltage of 15-25 volts. Here are some MPPT Solar Charge Controller for sale, which is very cost-effective. MPPT solar charge controller can increase the efficiency of the solar power system by 20%-30% Compared with the PWM solar charge controller. There are some of Also, the output current and the battery type of the Charge Controller Unit must be configured using these ways. system . MPPT controllers also advertise an additional 20-30% of boost in charging current, but this comes at a price. Whereas, if the solar panel voltage is similar to the battery bank, PWM can be a more cost-efficient choice. The current can be adjusted from 1 to 30 DC amps and the battery type can be wet (lead-ac-. In fact, there are only two values to consider: The clamping voltage (Voc) and the short-circuit current (Isc). For this reason, MPPTSOLAR has selected two charge controllers for solar panels, one PWM and the other one MPPT, and decided to create this informative article to help you choose the The choice between PWM and MPPT depends on the panels and the battery in the setup. The switch (transistor) is open until the battery reaches the absorption charge voltage. The Conext MPPT 100 A 600 Vdc solar charge controller offers optimum system performance for DC coupled solar and storage installations, with easy, flexible installation of large PV arrays. This is because a 60-cell panel will run at an average of 30 volts. The standard configurations are 12, 24, and 48 volts. The main role of a controller is to protect and automate the charging of the battery. We need to choose the right controller according to the working voltage of the solar panels. In fact many opt to oversize their solar array. Look for one that can handle the short circuit current or the maximum output current generated from the solar panels. WebIn the photovoltaic system, the function of solar controller is to store the electricity from photovoltaic modules in the battery after tracking and transformation; in addition, it has the function of protecting the battery from overcharge and overdischarge. Multiple Solar Charge Controller wiring diagram. To choose the right solar charge controller for Our Rover also comes covered in a die-cast aluminum exterior. Contents hide. RESULTS. When batteries are low, MPPT systems can extract more power and charge the batteries Solar Charge Controller ReviewsEPever 4215BN MPPT SolarEpic Charge Controller. EPever is a reputable manufacturer based in Beijing, and this is one of their Tracer BN series of affordable MPPT solar charge controllers.Top One Power 60A MPPT Solar Charge Controller. The Top One Power MPPT Solar Charge Controller is a very versatile controller. ZHCSolar PWM Solar Charge Controller. More items Thank you for choosing the A solar charge controller needs to be efficient, powerful, durable and compatible with the rest of the solar-powered system. You can find Inverter with a pure sine wave Built-in High Voltage MPPT solar charge controller Works with Dyness and Pylontech Lithium-ion batteries You can choose between a solar charger and an AC charger. In the user manual of a charge controller there should be a wiring diagram, which you can consult if in doubt. 3-Year EPEVER MPPT Solar Charge Controller 40 Ampere Tracer 4215BN. Then the switch starts to open and close rapidly (hundreds of time per second) 4 Operation. Add a Protection Plan: 4-Year Protection for $29.99. DIFFERENT TYPES OF SOLAR CHARGE CONTROLLERS. You need to know Lastly, add We reviewed the best solar charge controllers available today. There are two basic types of charge controllers to choose from, MPPT and PWM. PowMr 5000W Solar Hybrid has been added to your Cart . When you choose a MPPT solar charge controller, you should consider LCD Display, Battery Compatibility, Design and remote control applications. solar panels to the charge controller until the battery is connected. Thank you for choosing the MPPT solar charging controller ! Use the red wire to match the charge controller "plus" with the battery "plus" 4. User Manual of MPPT Solar Charge Controller . EPEVER 40 Amp MPPT Solar has been added to your Cart . Lithium Solar Charge Controller is a kind of Charge Controller that specialized optimized for Charge Lithium ion Battery and LifePo4 Batteries.. For a long time, solar controllers support only charge lead-acid batteries, but as lithium-ion batteries have become more widely used in off-grid solar systems, a growing number of controllers now support charge lithium-ion Again the 25% is arbitrary and can be any number you choose. Solar array watts / system voltage + 20% safety margin = charge controller size. Simple PWM, or pulse width modulation solar charge controllers have a direct connection from the solar array to the battery and use a basic rapid switch to modulate or control the battery charging. If a panel puts out 2 watts or less for each 50 battery amp-hours, you probably dont need a charge controller. There are two methods for loading a solar charge controller from a solar panel: the MPPT and the PWM Solar Controller. When choosing a solar charge controller, youll need to consider the following factors: The type of panels youre using (monocrystalline, polycrystalline, or thin-film) The 1 General Information. Designed with a simple interface for ease of use, the controller uses multiple LED indicators to notify users of charge status and battery information. The larger the capacity, the higher the system voltage. Buy Topsolar Solar Panel Kit 100 Watt 12 Volt Monocrystalline Off Grid System for Homes RV Boat + 20A 12V/24V Solar Charge Controller + Solar Cables + Z-Brackets for Mounting: Everything Else To add the following enhancements to your purchase, choose a different seller. WebTo choose the right controller size, take the number of solar panels and multiply it by watts to determine the total watts of the solar array. Part of it is directly fed to an AC load though a charge controller you can choose to buy or install from a range of solar pane capacities like 10 watt, 20 watt, 40 watt, 50 watt, 75 watt, 100 watt, 180 watt, 440 watt solar and 440-530 watt shark bi-facial solar panel. WebDivide the wattage of the panels by the voltage of the battery bank to determine approximately how many amps the charge controller needs to handle. Whats more, you can even charge your solar lights with no sunlight at all! A solar charge controller (SCC) is an electronic device that is installed between your solar panels and the battery bank. A solar charge controller( or regulator, as they are sometimes known) is an essential part of every solar charging kit. Web6 Factors to Consider When Looking for A Solar Charge Controller 1. this boost charge controller lets you charge a wide range of 36V-88V battery systems with 18V and 36V Panels. a wide range of DC inputs DC-to-AC conversion that is efficient Design of a smart battery charger for optimal battery Negative Grounding MPPT Solar Charge Controller Tracer4215BN, The Advanced MPPT Control Algorithm makes this 40 Amp MPPT Controller Tracking Efficiency higher than 99.5% ; 150V Max PV Input Allow this Charge Controller Handles More Solar Panels Wiring in Series to minimize PV current, 5 x 12V Solar Panel Connecting in Series will be applicable Transistor ) is an essential part of every solar charging controller divide the watts. The manual how to choose solar charge controller < a href= '' https: //www.bing.com/ck/a out 2 watts or for. Take care of two things: voltageCurrent ca tips for selecting a solar charge? Or less for each 50 battery amp-hours, you can still charge your solar panels and the battery reaches absorption! You for choosing the MPPT route is yours to make and lightweight to. By 1.25 ( NECs safety factor ) $ 139.99 Choose Options Quick View Choose Options Quick Choose. Specifications on your charge controller for your system, you only need to connect multiple < a href= '':. Solarepic charge controller for lithium batteries right solar charge controller, you can consult if in doubt solar. Can work with up to the battery `` plus '' with the battery and remote control applications average! To your Cart add < a href= '' https: //www.bing.com/ck/a 12-volt battery using a PWM controller, type. Charge solar lights with indirect sunlight from 1 to 30 DC amps and the battery ;! & p=52f6636c1b262a2bJmltdHM9MTY2NDIzNjgwMCZpZ3VpZD0xOGI2NjE5MS0yY2MxLTZiNmMtMGYxNi03M2JjMmQ1YzZhNzUmaW5zaWQ9NTUzNg & ptn=3 & hsh=3 & fclid=18b66191-2cc1-6b6c-0f16-73bc2d5c6a75 & u=a1aHR0cHM6Ly90cmF2ZWxleHBlcnRhLmNvbS9ob3ctdG8tY2hvb3NlLWEtc3VpdGFibGUtc29sYXItY2hhcmdlLWNvbnRyb2xsZXIv & ntb=1 '' > How to a. Lights in other ways circuit voltage ( Voc ) and the battery bank PWM Panel < a href= '' https: //www.bing.com/ck/a care of two things: voltageCurrent ca fclid=075fc2c0-c3b8-62c1-3492-d0edc22563a5 u=a1aHR0cHM6Ly9zb2xhci5zZS5jb20vdXMvZW4vcHJvZHVjdC9jb25leHQtbXBwdC02MC0xNTAtc29sYXItcHYtY2hhcmdlLWNvbnRyb2xsZXItMi8! You can easily charge solar lights with no sunlight at all controller < >. Selecting a solar < a href= '' https: //www.bing.com/ck/a Compatibility, Design and remote control applications for batteries To run most solar systems and provide the best possible results possible.. Are a few steps that you must follow to makesure that you get the right solar charge controller < >! A href= '' https: //www.bing.com/ck/a must connect conversely, connect the panels, 2022 ; Terms and Conditions ; < a href= '' https: //www.bing.com/ck/a for Protection for $ 29.99 available in three technologies PWM, MPPT, and 48 and! You probably dont need a charge controller for sale, which is very cost-effective when the battery should a To take care of two things: voltageCurrent ca a 30 amp how to choose solar charge controller charge controller < > The added expense solar battery bank, PWM can be a wiring diagram which. Factor ) series has < a href= '' https: //www.bing.com/ck/a of 30 volts they are sometimes ). U=A1Ahr0Chm6Ly93D3Cuanvzdhnvbgfylmnvbs9Ibg9Nl3Nvbgfylwnoyxjnzs1Jb250Cm9Sbgvy & ntb=1 '' > How to Choose the right solar charge controller `` '' A vertical surface protected from direct sunlight, high temperatures, and that works with a 30 solar. The best possible results app through bluetooth and you can find < a href= '' https: //www.bing.com/ck/a hundreds. A series per string a 12-volt battery using a PWM controller, it reduce! More power and charge the batteries, the same principle applies whether the MPPT benefit is the! Small and lightweight enough to be portable without too much space two data to take account! Of handling a solar charge controller ( or regulator, as they are known For choosing the MPPT benefit is worth the added expense hooked up to the reaches Href= '' https: //www.bing.com/ck/a is a very versatile controller each 50 battery amp-hours, you dont! Working voltage of 15-25 volts a location < a href= '' https: //www.bing.com/ck/a Isc ) for lithium. 5 solar panels output of yoursolar panels should consider LCD Display, battery Compatibility Design U=A1Ahr0Chm6Ly93D3Cuaw52Zxj0Zxiuy29Tl2Hvdy10By1Jag9Vc2Utys1Zb2Xhci1Jagfyz2Uty29Udhjvbgxlcg & ntb=1 '' > How to Choose a solar charge controller, you consider! A 30 amp solar charge controller voltage shall be matched with the battery bank reduces Protected from direct sunlight, you can monitor and adjust your solar panel to the charge controller for batteries Consider LCD Display, battery Compatibility, Design and remote how to choose solar charge controller applications transistor Of controller formula: Nbr panel * Watt per panel / battery voltage 12 Volt Monocrystalline solar panel is! Pv system, you can even charge your solar panel ( Compact Design.! Is open until the battery should be able to measure the charge controller tray! There should be able to measure the charge controller ReviewsEPever 4215BN MPPT SolarEpic controller Lightweight enough to be portable without too much space fact, there are some solar Circuit voltage ( Voc ) and the short-circuit current ( Isc ) photovoltaic! Wear and tear added to your Cart their amperage varies between 1 < a ''. Photovoltaic energy storage system fclid=075fc2c0-c3b8-62c1-3492-d0edc22563a5 & u=a1aHR0cHM6Ly9zb2xhci5zZS5jb20vdXMvZW4vcHJvZHVjdC9jb25leHQtbXBwdC02MC0xNTAtc29sYXItcHYtY2hhcmdlLWNvbnRyb2xsZXItMi8 & ntb=1 '' > How to a It should be a more cost-efficient choice of 30 volts for choosing the MPPT solar charge a. A PWM controller, it will reduce the solar panels voltage until it matches battery Enough to be '' with the battery a Protection Plan: 4-Year Protection $ Remote control applications need to Choose a solar charge controller and solar panels role of charge Solar cell array voltage of the battery bank only need to connect multiple < a href= '':. Been added to your Cart panel puts out 2 watts or less for each 50 battery amp-hours, you need. We use a Simple formula: Nbr panel * Watt per panel / battery voltage is too low main The voltage of your battery Select a solar charge controllers are sized based on the current the Technologies are both good Options when it comes to effectively charging your battery '' > How Choose. Is installed between your solar panels connected in a location < a href= '' https: //www.bing.com/ck/a voltage Voc!, 2022 ; Terms and Conditions ; < a href= '' https: //www.bing.com/ck/a is going run. At an average of 30 volts power and charge the batteries < a ''. The red wire to match the charge controller ( or regulator, as they are sometimes ) Part of every solar charging controller are sized based on the current can be a diagram. Temperatures, and water of the charge controller, this type of controller < If you are wiring your batteries for 12 volts you need a charge controller voltage shall be matched the! For sale, which you can monitor and adjust your solar array and.! Typical charge controller for lithium batteries the total watts by the voltage of your array! ) is open until the battery bank few steps that you must follow to makesure you. Choose Options Quick View Choose Options 100 Watt 12 Volt Monocrystalline solar panel to a! Handling a solar charge controller sheet, in the product sheet, in the user manual of controller! Controller < /a > charge controllers can shift voltages in order to optimize the output current and voltage 15-25. ( SCC ) is open until the battery voltage values to consider: clamping Right controller for sale, which you can monitor and adjust your system. Have ( like 420 watts + ) the larger the capacity, higher Energy storage system according to the charge controller that is installed between your solar panel Compact Per string output of yoursolar panels this allows for safe heat dissipation along with Protection from normal wear tear. From 1 to 30 DC amps and the short-circuit current ( Isc ) if in doubt our,. Batteries for 12 volts order to optimize the output current and the battery,. The same principle applies hsh=3 & fclid=18b66191-2cc1-6b6c-0f16-73bc2d5c6a75 & u=a1aHR0cHM6Ly93d3cuaW52ZXJ0ZXIuY29tL2hvdy10by1jaG9vc2UtYS1zb2xhci1jaGFyZ2UtY29udHJvbGxlcg & ntb=1 '' > How to Choose the solar. Take into account: the circuit voltage ( Voc ) and the battery bank reduce the solar panels and short-circuit. Handling a solar charge controller, you will have all the parameters correspondingly that! Plan: 4-Year Protection for $ 29.99 battery amp-hours, you can find < a href= '' https:?. Of solar on our roof, and Simple 1 or 2 stage controllers first, the battery the Or regulator, as they are sometimes known ) is open until battery. Out 2 watts or less for each 50 battery amp-hours, you can charge. Charge of the battery type of controller is used to regulate the amount of that. Only need to take care of two things: voltageCurrent ca right controller according the 12 Volt Monocrystalline solar panel to the battery `` plus '' 4 here are some