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Questions tagged [solar-charge-controller]

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Firstly I have these items lying around, 330W 24V Solar Panel, APC Back-UPS Pro 1000VA/600W with dead battery Wanted to see if I can repurpose this UPS circuitry to utilize solar panel during day time ...
ezio16's user avatar
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I have designed my MPPT battery charger to a state and I have been able to generate the 14.4V charging voltage, with the 40Ah battery charged upto 14.4V during bulk charging stage and absorption mode ...
Peace's user avatar
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I am trying to design an MPPT charge controller based on an interleaved buck converter. Per my design, I use the present panel voltage to compute the duty cycle that first outputs 14.4 V which is ...
Peace's user avatar
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So, I've purchased some 40A ANL fuses and holders for my solar controllers and I'm hooking them up tonight after the sun goes down. Due to a comment from a neighbor, I went back and reviewed my ...
boatcoder's user avatar
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See the attached circuit diagram and PCB design. All I'd like to do is have a very small LED turn on when the panel is charging the battery. Circuit description: Q1, a PNP transistor ensures that when ...
Andrew Earl's user avatar
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I have a mini project I'm supposed to be doing for university. I've decided to build a charge controller. We aren't allowed to use micro-controllers, so I'm grateful I could find exactly what I need. ...
Olalekan Adekanmbi's user avatar
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This circuit is a solar charge controller module Can you help me get the schematic and PCB of this circuit?
david olma's user avatar
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Source: Michael Davis Publishing (Mike's World) - A New & Improved Charge Controller Based on the 555 Chip In this circuit, the positive of the batteries and solar cells are shorted together when ...
Bren's user avatar
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I am planning to build a swimming pool heater, using a solar panel to drive a bilge pump which circulates pool water through 1/2" x (2 x 60) m poly irrigation tube to heat swimming pool. Solar ...
Leon's user avatar
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Objective I would like to power single 49 inch TV (LG 49LF6300) using only solar panel without a battery. I am aware that this will only keep the TV running for a few hours each day but this is not an ...
Chris Aung's user avatar
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We are designing a buck controller to charge a LiFePO4 battery (4 series 9 parallel cells, each of 3.2 V). Hence, we would like to charge the battery pack with 13.90 V but the buck output has got a ...
Vishal Jha's user avatar
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I am working on my mountain cabin and am wiring it with some new electricity. In the long run, I want to switch to only LiPo based batteries but for now I still want to keep my old Pb batteries as a ...
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Apologies for the long question. Background I have a grid-tie solar setup at home with no battery. It exports unused power between 1-1000W at 250VAC when the sun is shining and we are not using all of ...
ThatDude's user avatar
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I wish to develop a battery powered power supply to provide uninterrupted power supply for long duration 3D prints in an environment where mains power is unreliable. A regular ups power supply would ...
Lampshades's user avatar
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I have ~100 mAh 6 V solar cell that I want to use to charge 18650 lithium-ion battery. Purpose is to use a PIR sensor to turn on light when someone passes by, I am not very confident about the ...
asim's user avatar
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I have designed battery operated device. The current consumption is around 4ma. The battery which I use , is shown in following fig. the following schematic I have used to cutoff solar panel when ...
inventionClass's user avatar
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When I measure voltage in the solar input of my MPPT controller, it shows about the same voltage as the voltage of the battery output (about 12.3 V). Is this normal? The solar panels if not connected ...
maalls's user avatar
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How do I add 2 different sets of panels to the same battery bank? I'm currently trying to design a solar array that will fit my tiny RV. I've worked out how to fit 790 W on my lil rig with 2 200 W ...
JT Tucker's user avatar
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I'm trying to design a circuit to be used with some 12V LiFePO4 battery packs which don't have an integrated heater, so I can add thermal protection. The circuit would sit between a 65W solar charge ...
davegravy's user avatar
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I am looking into making a MPPT charge controller for some solar panels - I understand that it works on the basis of using buck converters to get the most efficient voltage to current ratio for the ...
Bren's user avatar
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I am planning a 12V dual battery setup to be used in a car. The aux battery is a LiFePo4 battery and it will be charged via a combined DC-DC and solar charger (50A, fuse 65A). I want to add a fuse and ...
Alex's user avatar
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This is a revision of a post from a few days ago. I'm currently working on designing a solar charge controller using the LT3652 chip that takes a solar panel input, charges a battery pack, and also ...
John G.'s user avatar
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I would like to drive an appliance of 170W and 12V with a 12V 3W solar panel using an arduino nano. Given the a difference in the power of these 2 devices (170W and 3W), I don't know if this is ...
S.E.K.'s user avatar
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I am working on installing a solar panel to charge a battery, and would like to create a power logger for testing the output from the charging circuit. I have seen resources on the internet for using ...
nikola's user avatar
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Recently I purchased a very cheap Chinese 10A 12/24v PWM solar charge controller to experiment with. From what I understand the PCB inside these devices are changing often and I've included more ...
Jonas's user avatar
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I have a setup consisting of three solar panels connected in series, which supply power to a variable frequency drive (VFD) that runs a three-phase motor. I am planning to incorporate an MPPT (Maximum ...
Bilal Khan's user avatar
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Are there any MPPT solar chargers that can also do coulomb counting, or do you need a separate fuel gauge IC for that? I have been looking for a while and there is no proof that an IC even exists that ...
Matthew3302's user avatar
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I have a 24v battery bank that has a 120v battery charger connected to it that runs when I run a generator. There's also solar panels connected to the output of the charger to help the batteries stay ...
joshua0823's user avatar
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Firstly, I am aware that a similar question exists. That being said, I have built a portable power station comprised of a 24V 25Ah LiFePO4 battery in an 8S1P configuration. From this I am able to run ...
Shalan's user avatar
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I want to build a solar panels device that can supply power to my doorbell, which is installed over a gate with no access to wires or power. The gate has a "bar" on top where I can install ...
Filippo Possenti's user avatar
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I've been researching ways of combining the outputs of different renewable energy sources (e.g. solar panels and DC rectified wind turbines) to provide a single output that could then be connected to ...
formerlolz's user avatar
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1 answer
429 views

My electric fence unit stopped working, but it is a nice case with integrated solar panel and battery holder. I figured I could repurpose it as a rechargeable general purpose 6 V power supply. The ...
Roger's user avatar
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I am hoping that someone has some time to help me double check to make sure these components are safe to use together? Everything seems like it checks out, but I would really like to get a second ...
Wastelandbogeyman's user avatar
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I could do with some help making sure I understand some MPPT battery charging fundamentals. Been reading up on this but can't find anything that has made it 100% clear for me. An unloaded, fully ...
formerlolz's user avatar
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358 views

I am building a buck converter that I eventually plan on using in an MPPT charger. I have not taken any power electronics courses. Below is the spice model I’ve been using. The issue is that point A ...
restless_resistor's user avatar
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My project is a solar powered RC car with the ESP32. Currently, I´m looking for a solar charge controller. I have two solar panels that deliver 3,5W at 6V. I want to charge Li-Ion or LiPo batterys. I ...
NurDerFch1846's user avatar
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I am integrating a solar energy system to my smart greenhouse. The energy system will operate two 12 V, 0.2 A case fans (they draw a maximum of 0.5 A for maximum rpm) and a 5 V, 0.5 A mist maker. I’m ...
Belal Bahaa's user avatar
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Is it possible to have at least one battery connected to our trailer circuits while both batteries in series (ie. 24v) are being charged by our two 33v solar panels? Will solution require a "...
Doug Null's user avatar
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I'm working with a bunch of mechanical engineers on an electrical engineering project and we're totally stumped. The main problem is to drive a small robot chassis using the power generated from solar ...
Drew Fernandez's user avatar
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2 votes
1 answer
669 views

I bought a cheap, generic PWM solar charge controller to test some solar panel and wind turbine ideas and decided to pull it out of its case so I could look at the PCB. I'd assumed the solar panel ...
formerlolz's user avatar
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1 vote
2 answers
606 views

Context: I am developing a weather station to be deployed in 4 different remote locations. It is going to be powered off of 2 18650 cells in series. Currently, my power management module is comprised ...
Mário Ghio Neto's user avatar
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2 votes
1 answer
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I am trying to build a PV charger (PWM), which I guess is kind of a buck converter. Below is a first LTSpice simulation. V1 are the PV modules, V3 is the battery. V2 is the microcontroller's supply ...
oliver's user avatar
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Lets say that I have a CC/CV charger based on buck topology and it is charging a 12V lead-acid battery through a solar panel. The lead acid-battery is being charged in CV (Constant Voltage) mode and ...
xrosaber's user avatar
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2 votes
3 answers
1k views

I have a solar-powered system with a 12 V LiFePO4 battery which will need to operate in -20 to 60 °C conditions. I have a charge controller with a temperature sensor which will disable charging below ...
davegravy's user avatar
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2 votes
3 answers
393 views

When an MPPT solar charge controller —in my case, based on buck topology— is charging a battery in constant current (CC) mode, the MPPT algorithm is applied to find the PV panel voltage (or input ...
xrosaber's user avatar
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1 vote
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273 views

I've an old UPS for my computer which draws 50 W on average and less than 150 W at full load. With the the built-in battery I only have about 10 minutes of backup time. I am thinking about getting a ...
Pyi Soe's user avatar
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1 vote
1 answer
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I have these charts from Renogy 12V Deep Cycle AGM Battery 100AH datasheet. Can somebody explain to me In the first chart: what does the F.V/Time column present? In the second graph: What does each ...
Yazan33's user avatar
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4 votes
6 answers
4k views

I have some confusion about how the output of an MPPT solar charge controller should behave. In my head, I'm thinking of a perturb and observe system where the output should oscillate around the ...
Microcontroller Enjoyer's user avatar
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1 answer
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I bought a small photovoltaic kit to do some experiments. It is composed of: PV panels charge controller batteries inverter In the controller's manual there is this connection diagram: It makes ...
Mark's user avatar
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3 votes
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My MPPT's maximum input voltage is 49.5V. The solar panel's specs are: Open circuit voltage (Voc) = 49.40V (plus or minus 3%) Maximum power voltage (Vmp) = 40.42V Maximum power current (Imp) = 10.02A ...
asan123K's user avatar
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