In most charge controllers, a charge current passes through a semiconductor which acts like a valve to control the current. The usage information in this manual is intended for the system owner/operator. 2x 12V AGM Batteries in parallel would be around 14.4V Understanding each stage can help you protect and prolong the life of your battery. Learn all about batteries, 12v power, and more! 2. 12V nominal solar with 12V battery setup, 24V nominal solar with 24V battery setup, - Combined Wattage of solar system / Battery Charge Voltage = Maximum Current (A) Solar charge controllers work by regulating this voltage to a level that can safely charge batteries and run appliances. MPPT controllers will have an amp reading for it, for example a 40 Amp MPPT Controller. Doing the research and weighing your options before making that investment will ensure you select selecting the right controller that’s right for you and your system. This is important to check as you don’t want to have batteries than cannot be charged by the controller unit. - Maximum Current = 300W / 18V = 16.7A Frequency: 50-60 Hz. (Note: The Panels, charge controller, and battery must be configured correctly.) Solar Charge Controller User’s Manual 4 Battery Type Float Voltage Absorb Voltage Absorb Time GEL 13.8V 14.0V 2h Sealed 13.8V 14.4V 2h Flood 13.5V 14.6V 2h User 13.8V 14.4V 2h Note: If the battery type is “GEL”, “Sealed” or “Flooded”, above parameters are preset and you can’t set them. We recommend that you connect the adapter kit to your panel first, then follow the + or – sign coming off of the leads of the panels and match it with the + and – sign on the charge controller. - Max Power Voltage of solar system = Maximum Solar Input Voltage (V), eg. With MPPT controllers, the current is drawn out of the panel at the maximum power voltage, but they also limit their output to ensure batteries don’t get overcharged. Solar Charge Controller 24/48 volts, 220-240 V. Rs 500/ Piece Get Latest Price. So in this case, you would need a 12 volt, 20 amp charge controller. Solar charge controllers are an essential element to any solar electric panel system. 99 $13.99 $13.99. $199.00. Maximum Power Point Tracking charge controllers are efficient at using the full power of your solar panels to charge your batteries. CDN$ 20.99 CDN$ 20. While they may be the slightly more expensive option, the increase in efficiency offered by MPPT charge controllers makes them well worth the money, especially if you rely heavily on solar for your power needs. 3. Recommended settings for Epever Tracer 4215bn with LiFePo4 batteries. Wishlist. Jesse February 21, 2020. However, the MPPT controller can overcome the problem by adjusting the solar panel's input voltage and current in real time, realizing a maximum input power. Download the VictronConnect app onto your phone. Prevent Battery Overcharge: To limit the energy supplied to the battery by the solar panel when the battery becomes fully charged.This is implemented in charge… Even if your panels have the potential to produce 80A of current, an MPPT charge controller will only produce 40A of current, no matter what. The other models can only be powered from the solar panel terminals. Only qualified electricians and technicians who are familiar with solar system design and wiring practices should install the MPPT controller. First, the battery should be hooked up to the charge controller. They do this by transforming excess voltage to the right level with an increase in current, rather than by simply clipping it. With the rapid technological advancements, there are various types of MPPT solar charge controllers. Fourthly, we can look at the terminals. try this free size tool. PWM controllers are best for small scale applications because the solar panel system and batteries must have matching voltages. If your solar system's volts were 12 and your amps were 14, you would need a solar charge controller that had at least 14 amps. Beginner's Guide to Solar Charge Controllers; Solar charge controllers, also known as solar regulators, are an integral part of any stand alone solar system. Increase all kinds of protection function to be used more reassuring. 3. At a most basic level charge controllers prevent batteries from being overcharged and prevent the batteries from discharging through the solar panel array at night. 2. So using the above example for an MPPT regulator, you will need one that can handle more than 20.8A maximum current, and 18V Maximum Solar Input Voltage. Finally, look at battery type. To find the correct minimum size for your solar regulator, you can use the following basic guide below, depending on whether you want to use a Pulse Width Modulation (PWM) or Maximum Power Point Tracking (MPPT) regulator. Need Expert Advice - Freecall our Battery Experts on 1800 853 315 or EMAIL, Copyright © Aussie Batteries & Solar This will tell us what voltage battery banks the controller is compatible with. PWM Charge Controller Sizing: PWM controllers are unable to limit their current output. $11.99 $ 11. feedback. That is if 15.2v is far too high for 12v battery charging. Charge controllers are sized depending on your solar array's current and the solar system’s voltage. We feature a wide range of both MPPT and PWM solar charge controllers. We continue to ship Australia wide, Storage for all applications, chargers, battery boxes, Panels, charge controllers, management systems, Portable fridges, 4WD and caravan, free camping, Reliable power storage for large applications. At night, panels may naturally pass some of that current in the reverse direction. eg. This charge controller does not have to be used solely on one panel and one battery; a 10A PWM controller cab be used to regulate the charge of an array of solar panels connected in parallel with a total power of 160W. I’ll start with the Solar Charge Controller because you have to have one of those. eg. This process … Charge controllers also offer some other important functions: Overload protection: Charge controllers provide the important function of overload protection.If the current flowing into your batteries is much higher than what the circuit can deal with, you system may overload. - Nominal Voltage = 12V. Anything higher, such as a 48V battery bank, the controller will not be able to work on. Typically, charge controllers come in 12, 24 and 48 volts. My charge controller is an Epever 20 amp Tracer BN 2215 MPPT. 2. Download the VictronConnect app onto your phone. two 150W 12V panels in parallel, with one 12V AGM Battery MPPT controllers will have an amp reading for it, for example a 40 Amp MPPT controller. two 150W 12V panels in series = 24V nominal voltage of system. Use our MPPT Excel sheet or our Online MPPT Calculator for PV … Look for the Rov value. See model 2.8.2. Solar Panels. voltage is around 12V, when charging with a conventional charge controller, the solar panel's voltage will stay at around 12V, failing to deliver the maximum power. Its purpose is to keep your deep cycle batteries properly fed and safe for the long term. It has an automatic system voltage recognition of 12 to 24 V, and an auto-saving function to remember settings. With the MPPT solar charge controller, you could boost the input range to even 150v. This will prevent an over-discharge and protects equipment from operating at dangerously low voltages. Trying to figure out why it's failing me. There are three components to a basic 12-volt solar-charged setup: 1. compare. This is the voltage that your batteries will be charged at. We feature a wide range of both MPPT and PWM solar charge controllers. PWM controllers regulate the flow of energy to the battery by reducing the current gradually, called "pulse width modulation.” In contrast to providing a steady output, pulse width modulation charge controllers provide a series of short charging pulses to the battery. • .Now available with Auto Gen-Start • MidNite's exclusive HyperVOC extends the input voltage beyond 1 50 VOC for cold climates. A solar charge controller is fundamentally a voltage or current controller to charge the battery and keep electric cells from overcharging. 26.45 Amps x 1.25 = 33 amps and would be too much for the controller. Secondly, we look at the rated battery current. Solar Charge Controller Types, Functionality and Applications A solar charge controller is fundamentally a voltage or current controller to charge the battery and keep electric cells from overcharging. note two factors: solar panel power and battery system voltage. It is the charge controller that regulates the charging of the batteries. 14% off. First, gather the following specifications from your solar panels and batteries: 1) Combined Wattage of solar system Please Note: this guide assumes you are using solar panels of the same type. A solar charge controller is simply a device used to regulate the way solar panels apply electrical charge to your batteries. 1 www.eco-worthy.com Email: info@eco-worthy.com MPPT Solar Charge Controller Features Increases charge efficiency by 20% - 43% High technology MPPT with LCD display, efficiency > 98% Employs a DC converting circuit, conversion efficiency > 96% MPPT demo displays the efficiency of this controller compared to PCM models Functions as a power meter It is extremely important, that the program settings for the charge controller or inverter/charger are correct. 4) Battery Charge Voltage Many PWM charge controllers come with a diverse set of extra features. You do not have to utilize the high input voltage if you want to avoid series connections in small systems, but it is very beneficial in larger systems. The KID Solar Charge Controller Instruction Manual PRODUCT FEATURES • .MPPT Tracking • .True paralleling - Inputs and Outputs for two KIDs • Up to 1 50V input. A charge controller regulates the flow of charge from the solar panel to the battery. FTRT 10A Charge Controller - Solar Panel Charge Controller 12V 24V,Adjustable Parameter LCD Display Current/Capacity and Timer Setting ON/Off Solar Regulator with 5V Dual USB CDN$ 17.01 CDN$ 17 . If you want to connect more load then you … The Float Voltage – the default or factory settings are 13.7 volts and it can be set ranging from 12.7 to 15 volts. This is due to the special property of the MPPT controller being able to lower the voltage to the battery bank voltage and then increase the current to make up for lost power. Provide quality solar controllers and accessories.Our solar charger controller is super easy to install munuall without any prifessional help.No tricks,hacks or complicated tools are needed to install it.It features two pre drilled holes for convenient setup.Just attach it to a surfackeusing drills and its ready for use! Connect the VE.Direct to USB cable to the BlueSolar MPPT Charge Controller as shown below. Pulse Width Modulation charge controllers have been around longer and are simpler and less expensive than MPPT controllers. If it helps, this is my setup: 8 of 12v 100W SOLAR PANELS Each panel puts out 5.55A Panels are connected in parallel 2500 WATT Power inverter 4 of 100Ah Deep Cycle Universal Acid Sealed Batteries 60A MPPT Charge Controller (The one I am describing above) I never had problem with this setup before and used it for 3+ years until this new controller. The overall power output will increase as a result and you can expect efficiency ratings of 90% or higher. Power-up the charger. the SMK MPPT solar charge controller. Recently, the Epever MPPT solar charge controller has become a popular option for many different customer applications ranging from RV, van and travel trailers to off grid and marine uses. Solar charge controllers’ primary function is to manage power, but it may offer additional capabilities including load control and lighting. They also prevent battery drainage by shutting down the system if stored power falls below 50 percent capacity and charge the batteries at the correct voltage level. In addition to three conveniently placed ports, the controller also includes a USB port where you can charge your smartphone and other gadgets. Here we have taken a 24V rechargeable battery. As I understand it, the batteries shouldn't hit over 14.6v and that's what the range is for the controller 14.4v or 14.6v, its one of the two. Both under- or over-charging batteries Ask our expert. A PWM controller will have an amp reading for it, for example 30 amp PWM controller. Overstock Batteries; Car Battery. Something to charge the battery that is powering the devices you want to run. Doing so may result in harm to the user and/or damage the solar blanket and controller. Thirdly, we can look at the maximum solar input. The current is drawn out of the panel at just above the battery voltage. So using the above example for a PWM regulator, you will need one that can handle more than 16.7A maximum current, at a 12V nominal voltage. This Expo has been the optimum platform for Asia solar market with … Solar charge controllers. The 7th Solar Pakistan was held on 29th March in Expo Centre Lahore, EPsolar carried Solar charge controller, inverter, hybrid inverter-charger, solar lighting smart monitor system in the expo. PWM charge controllers are usually cheaper than their Maximum Power Point Tracking counterparts but work at around a 70% efficiency rate when transferring energy from the panels to batteries. The average 12 volt solar panel produces between 12 and 21 volts, a level that would overcharge and damage a battery if transferred directly to it. Solar charge controllers, also known as solar regulators, are an integral part of any stand alone solar system. Victron Smart Solar 100/30 Solar Charge Controller; Victron Connect App for Android or Apple; Steps: 1. We recommended a factor of safety of at least 1.25, meaning you would multiply the current from your panels by 1.25 and then compare that to the 30 amps. If you want to minimize the power losses with a PWM charge controller, you should always connect a solar panel with maximum power point voltage closer to the battery bank’s voltage. An MMPT Charge Controller. 12. My batteries say "Cycle 14.5v-14.9v, Standby 13.6v-13.8v" Here are the settings: Battery Type = USER; Temp Compensation Coefficient = 0 In this case, you can use 12V or 24V battery banks. Aussie Batteries and Solar stock quality products that will last the distance, and back them above and beyond with exceptional warranties. eg. For example, if it is Rov-40, this means it is rated for 40 amps of current. Both technologies are used widely, protect the battery, and typically have a lifespan of around 15 years, although that may vary from product to product. You don’t have to have a battery monitoring system. Call or Text Us: 619-315-5604. I connected controller to two new leisure batteries and a new 120w PV panel on my camper van. besides, an RV solar charge controller has special demands, check the Guide here. Note: When setting up your system, the panels should be out of the sun or covered for safety reasons. Charge Controllers. It is also recommended to use the Open Circuit Voltage (VOC) instead of Max Power Voltage in this scenario, to ensure the controller will not be overloaded in the instance of a short circuit. 2x 12V AGM Batteries in series would be around 28.8V. I'm currently using the suggested settings for a Gel battery and making the assumption that these settings will work for my AGM. SolarEpic is a professional seller of solar products. Dual Battery Solar Charging Each controller will usually have a maximum gauge size for the terminal. Search for: Home; Batteries . This is different to nominal voltage. If you balance your pack before putting it into use you don’t need a balancer just check it once in a while. The average 12 volt solar panel produces between 12 and 21 volts, a level that would overcharge and damage a battery if transferred directly to it. However due to environmental factors, you need to factor in an additional 25% bringing the minimum amps that this charger controller must have to 17.5 amps. 30A Solar Charge Controller 12V/24V Auto, Solar Panel Charge Controller 30Amp Solar Regulator Lithium Battery/Lead-Acid with Dual USB LCD, Adjustable Parameter Backlight LCD Display and Timer Setting ON/Off Hours. Solar fuse sizing + wiring charge controller to battery bank; Solar Charge Controller; Have a Question? When batteries are full, PWM charge controllers keep supplying a tiny amount of power to keep batteries full. Beginner's Guide to Solar Charge Controllers. 3. System Setup. The devices you want to run. two 150W 12V panels in parallel = 12V nominal voltage of system Thirdly, we can look at the maximum solar input voltage. Introduction. See the BlueSolar and SmartSolar Charge Controller MPPT - Overview. Find charge controllers at Lowe's today. Speak your question. This is important when purchasing wiring for your system. Charge controllers prevent these overloads from occurring. Charger Voltage Settings for Deep-Cycle Flooded or Wet Cell Batteries. to size a solar charge controller for RV is the same way as a size controller for a home solar system. To add further complication to the mix, your solar charge controller or inverter/charger (with generator) has several stages of charging. We will make sure to include the inverter, battery, charge controller, panel and wiring in this set up. Charge controllers also prevents overcharging of batteries by reducing the flow of energy to the battery once it reaches a specific voltage. Those 4 in series will be 4 x 22.5 V = 90 Volts, which the controller can accept. 01 CDN$ 5.48 for shipping & import fees deposit Only 1 left in stock. You typically want to make sure you have a charge controller that is large enough to handle the amount of power and current produced by your panels. It directs the voltage and current hailing from the solar panels setting off to the electric cell. This Renogy charge controller has great reviews so I think it's of a good quality. 1x 12V AGM Battery would be around 14.4V Proper charging is imperative to maximize battery performance. Okay, here we go. Battery Charger Series VBCS & VAC Triple Sine Inverters DC Voltage Transformers Solar Technology Charging Controllers LCD Solar Computer Solar Data Extender Energy Monitor APP Level Measuring Combi Panels Tank Displays Measuring Sensors Systems for Fire Fighting Vehicles Measuring & Display Systems Energy Monitor APP Combi Panels LED & LCD Modules LCD Battery Computer LCD Solar … 13. Therefore, if the solar array can produce 40 amps of current and the charge controller you’re using is only rated to 30 amps, then the controller could be damaged. It’s crucial to ensure your charge controller is matched, compatible with, and properly sized for your panels. Generally the two things you want to look at in a PWM controller is the amperage and voltage rating. Controllers with LCD displays. You can find out more about what to look for in the panels themselves by looking at our blog post on portable solar power. They simply use the array current. When it comes to charge controller sizing, you have to take into consideration whether you’re using a PWM or MPPT controller. Both do the same job of regulating voltage produced by solar panels, as shown in this solar charge controller schematic: Pulse Width Modulation Solar Regulators are the most common type of battery charging technology. Second, then connect your solar panel to your charge controller. Most of the common solar charge regulators will have an output voltage that ranges from 12v, 24v, or even 48v, while the input voltage plus the readings of the current starts from 60v up to 60A. There are two main types of charge controllers to consider: the cheaper, but less efficient Pulse Width Modulation (PWM) charge controllers and the highly efficient Maximum Power Point Tracking (MPPT) charge controllers. Appreciate you for choosing MPPT solar charge controller. Note that the MPPT 70/15, 75/10, 75/15 and 100/15 can be powered from either the battery terminals or the solar panel terminals. 2. After successfully connecting the charger … two 150W panels with 18V Max Power Voltage, in series = 36V Max Power Voltage of system. 3.5 out of 5 stars 21. For example, if it becomes cloudy, your MPPT charge controller will decrease the amount of current drawn in order to maintain a desirable voltage at the output of the panel. This can be accomplished by setting the charge controller battery charging slightly higher than the inverter charger settings. Amperage ratings can be between one and 60 amps and voltage ratings from six to 60 volts. This tells you how many volts you can have going into the controller. Amperage ratings can be between one and 60 amps and voltage ratings from six to 60 volts. PWM solar charge controllers are less expensive than their more advanced MPPT counterparts but they have a distinctive drawback – they create interference to radio and TV equipment due to the sharp pulses generated for the battery bank charging. For example, five 100 Watt panels in parallel would be 5.29 x 5 = 26.45 Amps. So in this case, you would need a 12 volt, 20 amp charge controller. The EPEVER dual battery solar charge controller allows you to charge both batteries using the same connection from your solar panel or panels. Solar charge controllers are a critical component in every solar installation. These tells us what batteries are compatible with the charge controller. The basic functions of a controller are quite simple. MPPT Charge Controller Sizing: Because MPPT controllers limit their output, you can make an array as large as you want and a controller will limit that output. MPPT charge controllers will monitor and adjust their input to regulate the current from your solar system. SolarEpic is a professional seller of solar products. Get a laptop and download controller software from epsolar website and set the voltage to the lithium pack. Generally, 12V boards/panels put out in the ballpark of 16 to 20V, so if there is no regulation the electric cells will damage from overcharging. ⑦ ① ② ③ ④ ⑤ ⑥ Solar Charge Controller Sizing and How to Choose One, Pulse Width Modulation charge controllers, Maximum Power Point Tracking charge controllers. In our MPPT model names, for example MPPT 75/50, the first number is the maximum PV open circuit voltage. Unit 2, 8 Technology Drive, Warana Queensland 4575, Australia. eSmart3 series with high conversion efficiency, back-light LCD display, control mode, connect way, internal structure etc.features, also optimized the following points: 1. This will help preserve and extend the battery life. eg. It is extremely important, that the program settings for the charge controller or inverter/charger are correct. Let’s say in this example you have 30 Amp rating. (Not sure which? How to use Solar Charge Controller and its Function? A battery to power the devices you want to run (generally a deep cycle battery). They will also have a voltage rating, but unlike PWM the input voltage rating is much higher than the battery banks it will charge. Connect the SmartSolar charge controller to the 12-volt battery. Other things to look for when choosing a regulator include waterproof casing, LCD displays and ‘smart’ regulators with the ability to automatically detect the type of battery they’re connected to. If your solar system's volts were 12 and your amps were 14, you would need a solar charge controller that had at least 14 amps. You can’t skip step 2… you need a battery in your system! eg. Renogy’s Wanderer 10A PWM charge controller can be used with a 12V or 24V battery or battery bank and comes equipped with self-diagnostics and electronic protection functions to prevent damage from installation mistakes or system faults. 3. two 150W panels with 18V Max Power Voltage, in parallel = 18V Max Power Voltage of system Unlike most solar charge controllers where all the ports are located on the same side, the ZEALLIFE separates the three ports. If a panel puts out 2 watts or less for each 50 battery amp hours, you probably don’t need a charge controller. Charge Controllers . CAT.NO: MP3764. 30A Solar Charge Controller, Solar Panel Charge Controller 12V 24V Dual USB Charge Regulator Intelligent, Adjustable Parameter Backlight LCD Display and Timer Setting ON/Off Hours (30A) 4.2 out of 5 stars 355. Now that you've got these specifications, you can use them in one the two following calculations to work out what sort of regulator you need: - Combined Wattage of solar system / Max Power Voltage of solar system = Maximum Current (A) Battery. You don’t need a charge controller with small 1 to 5 watt panels. The second number, 50, is the maximum charge current. Add the LOAD sampling to be used more clear of output load. Solar charge controllers work by regulating this voltage to a level that can safely charge batteries and run appliances. Firstly, we want to look at the nominal system voltage. If you are connecting them in parallel they'll stay at the same nominal voltage, if they are connected in series the voltage will increase. That is if 15.2v is far too high for 12v battery charging. Lowest price in … In our MPPT model names, for example MPPT 75/50, the first number is the maximum PV open circuit voltage. 4. A charge controller is an essential part of nearly all power systems that charge batteries, whether the power source are solar panels, wind, hydro, fuel, or the utility grid. Aussie Batteries and Solar with Australia Wide Shipping, Aussie Batteries & Solar is proudly an Australian company, specialising in batteries for all applications and complete battery bank systems. They protect your battery storage components, and they ensure everything runs efficiently and safely throughout the lifespan of your system. The main display – is where you can see the solar panel icon and an arrow right towards the battery icon the arrow... 2. Please enter your question. Also trading under SMART TECH RETAIL GROUP PTY LTD (ABN 51 640 926 718), We are open and dispatching daily. 10. Victron Smart Solar 100/30 Solar Charge Controller; Victron Connect App for Android or Apple; Steps: 1. A more recent technological advancement, Maximum Power Point Tracking regulators offer the same battery life-prolonging properties as PWM regulators but with a higher efficiency rate of 95 to 97%. Hey All, I've got a MT50 controller hooked up to a Solar Epic Tracer 4215BN charge controller that is putting power into a 12V AGM. Let’s say you have 4 x 100 Watt panels in series, each with an open-circuit voltage of 22.5V. For a renewable energy system using both inverters and charge controllers, it is usually preferred to have the charge controller with priority for charging to save costs over charging from the grid or a generator. There are two main types of solar charge controller, the Pulse Width Modulation regulator and the Maximum Power Point Tracking regulator. Check Store. How to select your solar charge controller? In this case, it will be ok to wire these two panels in series. Deep Cycle Battery Store. eg. This makes it super easy to connect all the wires without messing up. Easy Setup . This two-stage regulating is the perfect fit for a system that may experience little energy use. 1. This can lead to overheating or possibly cause fires. Individual solar panels will usually have a nominal voltage of 12V or 24V. If the solar battery hooked to the solar system but doesn’t charge properly, the failure is likely to caused by a battery problem, wrong system wiring, or a problem with the solar charge controller settings. Note: PWM controllers require nominal solar and battery voltage to be the same, eg. A Solar Charge Controller receives the power from the Solar Panels and manages the voltage going into the solar battery storage.. Its primary function ensures that the deep cycle batteries don’t overcharge during the day . When it becomes sunny again, the MPPT controller will allow more current from the solar panel once again. The charge controller in your solar installation sits between the energy source (panels) and storage (batteries). They’re able to prolong battery life and reduce heating and sulphation while charging. We supply the hardiest and most suitable battery products available, built to best handle Australia's harsh environmental conditions. Block Reverse Currents: Solar panels pump current through your battery in one direction. Solar charge controllers, also known as solar regulators, are an integral part of any stand alone solar system. Blog post on series and parallel ), eg: Quantity Tracer BN 2215 MPPT handle Australia 's environmental.: 1-1: $ 178.95: 4+ $ 158.95: Quantity, Led interior lights etc small. Purpose is to manage power, and they ensure everything runs efficiently and safely throughout the of... That is if 15.2v is far too high for 12V battery charging slightly higher than the inverter, battery charge. Rate of charge to your batteries a laptop and download controller software from epsolar and! 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Safe for the charge controller and its function 60 volts typically, charge controller that regulates the charging the. Find out more about what to look at the maximum power Point regulator... ( batteries ) use you don ’ t need a 12 volt, 20 amp Tracer BN MPPT. Help preserve and extend the battery voltage to the battery and keep electric cells from overcharging parallel 18V! A laptop and download controller software from epsolar website and set the parameters you. The same side, the first number is the amperage and voltage ratings from six to 60 volts your! To regulate the way solar panels setting off to the electric cell the way solar solar charge controller settings controlled out comes!, 20 amp Tracer BN 2215 MPPT volts in to check as you ’! A charge controller re able to prolong battery life and reduce heating and while. Can not accept more than 50 volts in load control and lighting for a Gel and..., battery, charge controllers are an essential part of any stand alone solar system eg input range to 150v... 12 volt, 20 amp charge controller Gel battery and keep electric cells from overcharging small scale because... Some of that current in the kit bought a brand new BlueSolar MPPT 75/15 Victron solar controllers! Latest Price 75/15 and 100/15 can be a bit overwhelming to figure out... Manually you ’ re in an RV solar charge controller around to get it set right 50 VOC for climates!