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Questions tagged [solar-charge-controller]

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As part of a project, I have implemented a charger circuit based on the MCP73831 charge controller to keep a 3.7V Lithium Ion battery charged via a small solar panel (5V, 350mW max output): The + ...
erikor's user avatar
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41 views

I have a simple circuit for a low key design. I have a solar panel of 5V/3mA rated solar panels. I want to store the charge in a super capacitor and final get 5V/500mA output from a DC-DC converter. ...
Saaya's user avatar
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My charging station DC spec is Wmax = 600W, Vmax = 60V, for 11-32V the supported current is 10A max, for 32-60V, the supported current is 12.5A max. It has an MPPT controller. My solar panel spec is ...
gavenkoa's user avatar
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I'm analyzing the included PCB in a Harbor Breeze solar light (model SL1832) to see if I can repurpose any parts of it for use in a LoRa mesh network node. There's this small IC marked ...
A. Vance's user avatar
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I want to use an LM1084 and two resistors to limit the voltage to 21.9V I have removed the reference design capacitors, assuming that stability should not be an issue here. Could that lead to nasty ...
call me carrot's user avatar
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I have a solar street light that had two 18650 batteries in parallel, 1500 mAh each (3000 mAh). I ​​removed them and installed three batteries in parallel, each of 1800 mAh (5400 mAh), for greater ...
Panamanian's user avatar
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I am now trying to create a small wireless battery powered IoT solution based on an esp32 microcontroller. I am trying to measure some water depths at a private bridge and from there send the ...
Marcus Spydevold's user avatar
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1 answer
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Both the BQ25672 and the BQ25798 lithium battery charger ICs have the issue that they shut down permanently in low sunlight if the battery completely discharges. To fix this, TI released an ...
redfast00's user avatar
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I just started working on projects with ESP32 and stuff like that. I’m making a project that requires a solar panel system. My solar panel is 12V, and I have an 11.1V 2600mAh Li-ion battery, a 3S BMS ...
jojo 'S's user avatar
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1 vote
1 answer
133 views

I need to charge three car batteries with slightly different specifications from a single solar panel. Since I don't think I can connect the batteries together, I tried making the following wiring ...
colin's user avatar
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3 votes
3 answers
277 views

I have 2 solar panels: 540 W, 49.6 V, and 13.86 A, and 1 controller with the max input at 90(96) V DC, 100 A. In series, the solar panels put out almost 100 V DC: Is there a simple way to drop 100 V ...
michael's user avatar
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I have a small DIY project and there is a solar charger PCB inside a sealed case. The solar charger circuit is a shunt regulator based on TL431. The problem is that the transistor gets hot very ...
fel88's user avatar
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At the moment I have a solar charger circuit (shunt regulator for overcharge protection) that charges battery (LIC) from PV and it works nice. But there is a problem with night discharge. I measured ...
fel88's user avatar
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4 answers
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Solar Panel 6V (https://aliexpress.ru/item/1005006020071511.html?sku_id=12000042919843716) LIC capacitors 4V 200F (https://item.szlcsc.com/3567431.html?lcsc_vid=...
fel88's user avatar
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I have a solar set up 4×260 W panels with Vmp 31.1 V and Imp 8.37 A. My battery set up is 24 V with 2× 12 V 260 Ah AGM batteries in series. I have a 2 kW inverter for loads (as well as some LEDs ...
user2301960's user avatar
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Can grid-tie solar inverters run on batteries instead of photovoltaic panels? My question is can I replace the solar panels that are connected to my grid tie (on grid) solar inverters with similar ...
Doctor Pinocchio's user avatar
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2 answers
634 views

I recently bought a 180 W solar panel that has an open circuit voltage of 24 V and and full load voltage of 19 V with 9.3 A current. I also got a cheap PWM charge controller but that simply doesn't ...
Saad Nisar's user avatar
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1 answer
149 views

I'm planning two solar panels connected in parallel to solar charge controller. I want to add a double pole DC isolator in between. I'm not sure how to interpret the wiring diagram on the right side ...
Krzysztof Szynter's user avatar
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Taking into account that the power-path circuit between the solar panel and the battery works fine, would it be possible to introduce another P-MOSFET(Q3) to extend the power sources to 3? For example ...
coreos's user avatar
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3 answers
1k views

I have a solar panel controller that has a USB port output 5V ~0.5A to charge my phone, but it's slow. When I use a powerbank that supports super fast charging to charge the phone, it does charge &...
Khỉ Em's user avatar
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2 votes
1 answer
197 views

I’m working on a project based on the ESP32-S2 microcontroller, which integrates several sensors, including a DS18B20, a BME280, and an HX711. To manage power consumption without relying on the deep ...
r3v1's user avatar
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4 answers
343 views

I have an ESP32 that I want to power with a 18650 battery, which I’d like to recharge using a solar cell. The TP4056 charging module works perfectly until I connect the ESP32. At that point, the ...
Epanadiplose's user avatar
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I asked a question whether with DC breakers does polarity really matter?, that caught fire in the direction of whether at all to use those breakers or any breakers for that matter. The suspicion is ...
Gunther Schadow's user avatar
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1 vote
2 answers
147 views

I have a few solar garden lights that works and I wanted to increase its light output. I saw its circuit and it's using a IC YX8018 and looking at the circuit and datasheet I understand that the ...
Kokachi's user avatar
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1 vote
2 answers
348 views

I'm working on a weather station project where I have a small 6 V (max 7 V) solar panel connected to the Lx-LCBST Li-Ion charging (TP4056) circuit, I would like to be able to cut off the solar panel ...
Marcin Pluta's user avatar
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-1 votes
1 answer
196 views

I'm in quite a situation I have a 220Ah inverter battery. I was hoping to charge it with 14v 15A approximately 210W which I would get from a buck converter. I bought the converter from AliExpress here ...
Ifiok Ekott's user avatar
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0 votes
1 answer
57 views

I apologize if this seems stupid, but i have never done anything like this before. So I have two 12v batteries (car batteries) and one charge controller - the controller says PWM battery charging, and ...
Cynthia Adams's user avatar
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0 votes
0 answers
118 views

I'm trying to charge a 3S LiPo (11.1V) battery with a 6V solar panel. Ideally, I would like to find off-the-shelf components to achieve this functionality efficiently. Background: I've been searching ...
Maxpol's user avatar
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1 vote
2 answers
244 views

I have a 17kW capacity solar panel system, split into 4 divisions, each one connected to a Victron MPPT charge controller. Also, I have a 6000VA Victron offgrid inverter. On a bright, cloudless day, ...
Wanek T's user avatar
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0 votes
1 answer
289 views

I have received a good offer for a 400V to 36v solar panel (40V ~ 10.1Amps open circuit). My question is, I already have a 12V solar chargers and a 12V battery. I want to pair this with a 12V battery, ...
Panamanian's user avatar
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0 votes
2 answers
254 views

I'm a beginner and I'm trying to figure out how to charge two 18650 cells in series using a solar panel with a 12 V output. My goal is to power a circuit for an NPK sensor that operates at a voltage ...
Damiano Miazzi's user avatar
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2 votes
2 answers
1k views

Here is my equipment: I am using solar controller to run motor which runs alternator which generates electricity and which is used for my house 🏡 requirements. 10 kVA single phase 220 V, 50 Hz @ ...
Raman Bhadu's user avatar
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1 vote
1 answer
176 views

I am attempting to use a solar panel to charge four 12V AGM batteries. These are connected to batteries on quad bikes. We are hoping to allow them to trickle charge while they are in the garage. The ...
Samantha Garcia's user avatar
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0 votes
0 answers
76 views

I'm trying to create a circuit in which a BQ24210 automatically switches between charging a battery via battery tracking mode and charging it via input voltage regulation mode. This is done by having ...
gins123's user avatar
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2 votes
0 answers
632 views

I have created a solar battery charger using the CN3795 IC. The goal is for the panel to output 2A at 5V. The panel characteristics are as follows: 50W, Vmp of 17.22V, and Imp of 2.91A. For the ...
Alexander idid's user avatar
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0 votes
1 answer
75 views

So, I am working on a scientific instrument that measures air quality. It uses a raspberry pi with a couple of sensors. Essentially, this instrument is going to be deployed in an Urban area in a ...
Jack's user avatar
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0 votes
0 answers
307 views

I'm working on a low-power project using an esp32 and an e-paper display which will be used indoors. It uses a lithium ion battery. I want to harness solar power so the battery has be manually charged ...
uzumaki's user avatar
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0 votes
0 answers
144 views

I am quite confused regarding the MPPT charger and the MPPT boost converter. I have a hybrid inverter where I have a boost converter circuit at the beginning with inputs from the PV. The output of it ...
kam1212's user avatar
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0 votes
0 answers
137 views

so I'm currently working on an MPPT project using Asynchronous Buck Converter with the design : Capacitor Input : 470uF/100V Capacitor Output : 1000uF/100V Inductor : 65uH fsw : 39khz current : 30A ...
tabun's user avatar
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0 votes
2 answers
111 views

I am asking this question because it seems to me that this is necessary always, but I don't see people doing it. I see 196A battery to inverter setups with a 40A charger only. To me that seems wrong. ...
Gunther Schadow's user avatar
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0 votes
1 answer
211 views

I am designing a solar power system which I would take deep into the Amazon forest to an indio village. They have no energy, and they like to have internet (StarLink) and a fridge would be really ...
Gunther Schadow's user avatar
  • 1,721
0 votes
0 answers
75 views

My idea is to set up a circuit that uses a 18 V, 15 W solar panel to charge three 3.7 V 21700 Li-ion batteries in series (nominal voltage = 11.1 V) while the solar panel is connected directly to the ...
Geona's user avatar
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0 votes
1 answer
378 views

I came across the BQ25703A IC on TI's webiste. It clearly shows Solar input/MPPT. However, there is no mention of this in their datasheet. So am I missing something or is TI lying and overselling this ...
JoeyB's user avatar
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2 votes
2 answers
441 views

I am trying to build my solar charger to charge my lithium batteries. The lithium batteries already have a BMS on them. I am using the BQ25703A IC from Texas Instruments. Datasheets: BQ25703A BQ2570X ...
JoeyB's user avatar
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1 vote
3 answers
111 views

I have a metrology device I need to sustain off 12V LiFePO4 batteries in a northern climate (near latitude 43.65) and urban environment. Solar panels will be 50W 24Voc (~18V maximum power point) with ...
davegravy's user avatar
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0 votes
1 answer
49 views

My inverter requires a 96v battery input and my MPPT solar charge controllers have a maximum battery voltage of 48v, so I connected them together like this: Is this a bad connection? If yes, what is ...
GuruKay's user avatar
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0 votes
1 answer
129 views

I bought a CJMCU-3652. It is based upon the LT3652 from Linear Technologies. In the datasheet on page 15 there is a description on how to calculate the resistors to properly charge whatever battery ...
Cowboy_Patrick's user avatar
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0 votes
1 answer
301 views

Is it possible to add an MPPT controller (or charger?) upstream of a battery management IC that lacks solar input, as a means of supporting a solar power source? I'm finding battery management ICs ...
davegravy's user avatar
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0 votes
1 answer
804 views

I have a 12V, 200Ah lead acid tubular battery which I charge with solar panels using a PWM or MPPT charge controller. PV array specs are: ...
Irfan Latif's user avatar
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0 votes
1 answer
177 views

I'm looking into charge controllers that have features to limit the charge rate of a battery. I've got a small battery bank, and only want to charge at say 10Amps max. It looks like many of the ...
2b77bee6-5445-4c77-b1eb-4df3e5's user avatar
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