Questions tagged [solar-charge-controller]

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231 views

Connecting BMS to charge controller and load

Im trying to design a circuit that the load will get power from solar panel or a battery (in case the solar panel will not deliver enough current\voltage) Also wanted to mention that this is a hobby, ...
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0answers
298 views

Solar Li-Po battery charger with MPPT algorithm

I'm new here but I have read a lot of topics here about my question. I am designing a solar battery charger with MPPT algorithm but I don't know if I am doing it well. First of all my specs are here: ...
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429 views

Solar charging a lipo battery with ESP8266 as a battery load

I am trying to add solar harvesting capability to my IoT device based on esp8266. I am using linear charge controller (MCP 73831) with solar input to charge a 500maH lipo battery. An observation when ...
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1answer
48 views

Drawing energy from a 3.7V LiPo battery while simultaneously charging with a solar panel

I have a 200mAh 3.7V (0.7W) LiPo battery that I am looking to use as an energy source for a large model airship. I also have a 7.2V 100mA (0.72W) solar panel that I would like to use as a means of ...
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1answer
40 views

Buck- Boost converter failed on surge at 500volts

Basic Technical Details The driver is basically a DC solar charge controller, it's used in solar street lights, it requires a battery and panel. This driver uses the Buck-Boost Topology. At night it ...
1
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1answer
79 views

Solar cell DIY with monocrystalline silicon wafer

I would like to make my own solar cell- From a quick search on youtube, these 2 videos are apparently always the #1 result for "solar cell diy" keyword or similar: Video 1 Video 2 The ...
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44 views

Wiring an automatic solar light for a tiny library

I want to add a light that comes on when you open the door to my tiny library that's powered by a small solar panel. I'm no electrical expert but I do know basics enough to make simple circuits. My ...
1
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1answer
97 views

Maximum Power Point Tracker (MPPT) charge controller - what drives the weight?

I'm having trouble finding any literature paper that studies this problem. What drives the weight of an MPPT charge controller? How would I go about reducing that weight if I had to design a custom ...
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1answer
304 views

It is possible to use a 100W 12V solar panel directly to charge a laptop, using a buck converter for example?

I am planning to go off the grid due to the pandemia, to an isolated village. I am working remotely I am looking for a solar approach to power my laptop ACER A5 515. The charger is rated 40W. I was ...
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1answer
160 views

Charging 4 x 12V lead acid battery with solar in series or parallel?

I have a small electric vehicle that currently uses 4 x 12V 8Ah SLA batteries wired in series as its 48V battery packs. I have 2 of these packs. In order to charge the batteries, I unplug all of them,...
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1answer
90 views

Heating issues with solar charging circuit

I am using the above circuit to charge a 7.4V Li-ion Battery.With input MPPT voltage set at 12V, I have applied 13V input voltage to the circuit. The battery is charging at 1.4A. (according to the ...
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33 views

wiring two inverters/charger at the same battery bank

I have 30 solar panels charging 12 batteries (48V system, 4 12V batteries in series ×3 ). 230 W / V=36.4V \$I_{\text{SC}}=8.56\,\text{A}\$ My problem is that I have not found a solar charger for the ...
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1answer
51 views

How to attach a relay or any circuit to make a solar inverter work as UPS

I just purchased a new 2.5kW solar inverter. It has following out put functions When solar power is available it will give AC power from it if solar power is low it will get power from battery and ...
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65 views

Charger CN3722 does not terminate charging

Update: R7 is fix inserted by the manufacturer and is always 14k. R6 has to be changed according to the manufacturer to 5.76K if a 2 cell Li-Ion is charged at 8.4V. The manufacturer even supplies the ...
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117 views

Will this schematic work for my custom LifePo4 BMS and power MOSFET control?

I have designed the following schematic which I plan on using as a raspberry pi hat to monitor the individual lifepo4 battery cells wired in series (16s - 48v) and to toggle on or off 2 different ...
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27 views

Solar controller efficiency

To my understanding, most solar controllers use some form of PWM to output a desired current/voltage combination. These seem to often do some sort of DC-DC conversion. This seems to be wasteful and ...
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68 views

Is grounding 12v 100W solar panel to a lightning rod necessary?

My plan is to put a solar panel on my greenhouse to run a 150 W 12 V heater for 20 minutes max and turned on depending the low temperature is detected by a sensor, automation controller and a grow ...
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40 views

Can I connect two charge controllers, one controller to lithium ion battery and the other controller to AGM battery. One 400 watt PV

Can I connect two 12 volt charge controllers to my 400 watt solar array? I presently have a 12 volt 40 amp MPPT controller connected to a 12 volt 200 Ah lithium ion battery. I would like to connect a ...
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20 views

LTC3106 solar harvester over-voltage at output during recharge

I'm using an LTC3106 in the configuration of the attached schematic: It works fine from battery and from Vin inputs, delivering the expected 3,3 V at Vout. Problems arise when, with Vin present, the ...
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20 views

Regulate low quality battery charger output through solar charge controller

I have a remote P2P internet relay station that has had just had it's solar panel stolen. In order for me to go service it requires 400L of fuel in a speed boat; so I would like to put off going there ...
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2answers
49 views

What is the main reason why solar inverters fail?

As I understand electrolytic capacitors fail eventually after some years of use. Is there something else that breaks down too? Because changing inverter just because its capacitors are gone is really ...
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1answer
35 views

Connecting CN3722 to Load AND Battery

Like the title says, can I do this? I got two schematics in mind about how to wire these up, which one is the correct one? This one is straightforward, but will it actually work if connected to load? ...
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66 views

How to disable battery charging in an inverter?

I installed solar retrofit to an already existing inverter battery setup. Now during daytime,inverter will be in battery discharge mode by converting DC from battery to AC for appliances use.While ...
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0answers
39 views

Transformer with diode to provide a battery backup

I have a small solar setup running with a low capacity battery plus a 100w solar pannel and i have 3 raspberry pi's getting juice from it. The thing is that sometimes with a cloudy day i can have my ...
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55 views

Is there a possibility of repairing this garden solar led lamp?

I bought several solar lamps that look like this: They have a flame effect. Like all other such solar garden lamps the solar panel is too weak. When there is little sun in two days they are empty. ...
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62 views

Using 3.7V li ion batteries in series

I'm working on a solar powered project which requires two voltage levels - 3.2v-4v @ 2A for one element an 6v-12v @ 500mA for another. My initial plan was to use a 12v lead acid battery with a solar ...
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26 views

Trying to figure out an RC Plane Solar Charger

So for a project I am looking at making a solar charge controller for a 3S Li-Ion battery system used in an RC Plane. The issue I am running into now is that I am unsure how to go about designing the ...
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2answers
68 views

PWM and MPPT charge controller on same solar panels

I have two identical solar panels in series that are connected to an MPPT controller (EPEver Tracer 1210A), which is currently charging two SLA batteries connected in parallel meant to power some ...
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17 views

Specific solar circuit setup recommendation?

For a setup which uses: a 100Ah 12V battery (Absorbed gel mat Lead acid), with an MPPT solar charge controller, a 12V 12-55A DC electric motor as the primary load, additionally some 12V LED lights and ...
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0answers
20 views

Automatic power selection circuit with solar panel

I am working on a design which includes a power regulator , Lipo Battery and battery charger circuit. If V_USB power the battery gets charged and the MCU gets power, if no power is feed to the usb ...
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0answers
33 views

5MM Blinking (Candle) LED replacing a White 5mm LED in a Solar Garden Light

I'm looking to replace the standard white LEDs I have in my solar powered garden lights with the same size yellow blinking (candle) LEDs. My garden lights use the ANA618. I know the blinking LEDS ...
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0answers
48 views

Solar cell input for LTspice

I am trying to send a solar input into the LT8390 in LTspice. I am having trouble finding example circuits in LTspice that I can implement. Any direction or LTspice model files would be very helpful.
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44 views

Is it ok to connect the output of a solar controller to a fused outlet on a fuse panel?

The fuse panel is breakered to a battery and is used to power other low amp equipment. The model is the 6 gang blue sea panel with blade type fuses. Since the fuse panel is just a couple pieces of ...
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221 views

CN3722 solar charging IC not working properly

I'm currently working on a custom PCB where I have a microcontroller hooked up to 3 LiIon batteries which are meant to get charged by a CN3722 IC. However, when I connect a solar panel to the circuit ...
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0answers
18 views

Can I run a charger and inverter in parallel on solar?

Currently I have about 4.5kw in solar running to an inverter. The inverter is energy saving only, so when the grid goes out (it does frequently) I have no power. I just want to keep some basic ...
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23 views

Arc observing while connecting battery to charge controller

I have a solar system as shown below diagram. When I am trying to connect the battery terminals to charge controller, immediately a spark/arc is observing. Does this because of some capacitor getting ...
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2answers
261 views

Can I charge a super capacitor with a MPPT?

I already did some testing. I have a 220mW solar panel that charges a 3V supercap (takes a long time) which eventually powers my wifi module that needs ~1.5W (1.5 J/s) for 1 second then ~90mW (0.09 J/...
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0answers
65 views

Max Charging Current for AGM batteries in parallel

I have 3 identical 125ah AGM deep-cycle batteries, all purchased at the same time. They will be charged with solar, through a charge controller. I have them connected together in parallel. They are ...
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0answers
190 views

Connect multiple MPPT charge controllers to a single solar panel?

I have a small 18V/80W solar panel and some old lead-acid UPS batteries (that I got for free). About half of them are one brand and the other half are another, so I don't want to connect them all in ...
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0answers
17 views

Solar Low Current Disconnect Options

I've built a system which allows me to remotely control a well pump which is directly connected to 24v solar array. There is a regulated battery bank/inverter, but it's farther away, and the pump is ...
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0answers
60 views

Gate drive circuit for 1500VDC two switch flyback converter

I am designing two switch flyback converter for 1500VDC input solar application. I am little bit confused while selecting gate driver circuit, specially for high side gate drive. I didn't find any ...
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1answer
66 views

Issue with my solar charger using LM2596

I am using a 20W solar panel, maximum voltage 21V & maximum current 1.23 A. I am using LM2596 to dtep-down to 5V to charge my powerbank, hich will later power my Nodemcu (ESP8266 board.) Issue in ...
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0answers
36 views

Improvements on a circuit that charges a battery from a solar cell

I am working on the circuit in the picture below. This circuit represents how to power a battery from a solar cell. I understand the logic behind the diagram but I was thinking what improvements to ...
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40 views

Adding a bike generator to a solar panel system

I have a 12V solar panel setup currently and would like to add a bike generator to it. I've created the bike generator and have it also producing 12V direct current. I've seen some other post where a ...
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1answer
289 views

How to Ground DC 12V Battery, Charge Controller and Solar Panel?

In my shed, i've got a 12V 120AH leisure battery and 30A MPPT solar charge controller, on the shed roof there are three 100w 12V solar panels. I wonder if I need to ground any of those? If yes what ...
0
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1answer
166 views

MPPT Reads Negative Amps

I have MPPSolar PCM5048 MPPT which is connected between the solar panels and the batteries. It was working well until yesterday as a sudden it reads negative amps on the battery current. it keeps ...
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1answer
22 views

Recharging of Inverter Batteries

Is it possible for some reason I can be able to safely connect two charge controllers (who draw their solar power from the same solar panel array) to charge separate/independent batteries? (It is to ...
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0answers
32 views

Is it safe to have two batteries in series on a solar panel system with 14.22v and 14.46v?

I have two batteries in series plugged to a solar panel system. In parallel they used to balance each other perfectly. But now i'm trying to have a 24v system and I have them in series. They ...
0
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1answer
51 views

what is the equivalent circuit for battery in charging process?

OK I know a little bit about battery discharging process that is, I know that the open circuit voltage of battery decreases as SOC goes down, and the voltage is less than the Voc when connected to a ...
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1answer
54 views

Simple Solar Circuit

I had a very cheap solar panel + controller where the controller died. To cheaply replace it I was going to build my own using some parts I had laying around and use a step-down (LM2596) to limit ...