Questions tagged [solar-charge-controller]

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2
votes
1answer
90 views

A solar circuit to charge a battery with a non-standard voltage

I have a Pb battery I pulled from one of my sons toys (no longer being used of course) and it's specs are as follows. ...
0
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2answers
46 views

Best way to charge 12V AGM battery from 36V lithium ion battery cluster in solar car?

I have about 10KW of lithium ion 36V hoverboard batteries that I want to connect to my 12V AGM battery in my Prius. I am placing several 18V solar panels in parallel instead of series on the roof of ...
0
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1answer
46 views

LT3652 not charging to full float voltage

I've put a circuit together for a 3S Li-Ion battery pack with an intended float voltage of 12.15V (max charge current set to 0.4A) based around the LT3652, (LT3652 Datasheet). When charging the pack ...
0
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2answers
89 views

Solar power without an inverter

Normally, solar-powered homes have an inverter, which is a device that converts DC input voltage to AC. That AC is used to power electronic devices, which may use an adapter to convert back to DC, for ...
0
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2answers
90 views

Multiple INA226 PCB for solar monitoring with a Raspberry Pi

For a project, I have a solar panel and a charge regulator with a 12V battery. The load is a Raspberry Pi. I want to monitor the voltages and the current flowing from the panel, the battery and to ...
0
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1answer
43 views

What determines the load output voltage of this Adafruit solar charger?

I am looking at this board from Adafruit. It seems like it could work in my project, but I have some concerns about the maximum load output voltage. My understanding of this board is that I can ...
0
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2answers
53 views

Is it a good idea to charge multiple Li-Ion batteries using a single buck converter?

I am trying to implement a DIY MPPT into my solar tracker project and I wanted to know if it was possible to charge all of the three li-ion 3.7v batteries in series with just one feedback buck ...
1
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1answer
92 views

Switching solar power off through mosfet

I have got the following situation: ESP32 powered through a LIPO Battery 5V (1W) solar panel LIPO Battery charger (through the solar panel) voltage divider to sense current flowing through the solar ...
0
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2answers
36 views

Operating a solar panel at lower than MPP

The power curve for a solar panel drops off slowly to the left of MPP (lower voltage) and more rapidly to the right of MPP (higher voltage). Observing my MPPT CC, when it needs to "throttle"...
0
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1answer
31 views

Generator Charger Grounding

A while back I sketched up a small charge control circuit that can be used with either a wind or solar generator scenario. This is only meant for smaller 12V 10-30W /hobbyist/home made generators and ...
0
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1answer
53 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 ...
1
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1answer
46 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 ...
0
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0answers
77 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 ...
0
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1answer
42 views

super capacitor's maximum charge current

I am designing a backup system based on a supercap and an LTC4041. The calculations by the guidlines in the datasheet brought me to the folowing parameters: Capacity:2.4F Charge current: 1A charge ...
0
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2answers
51 views

Trying to measure solution's color intensity. Is there any way to stop voltage variations?

I am trying to build a spectrometer to measure the color intensity of a solution. By chemistry I can make up a solution that has exactly 1 mg of gold in it and another that has 5 mg of gold in it. If ...
0
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0answers
125 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 ...
1
vote
1answer
81 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 ...
0
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0answers
30 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 ...
0
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0answers
26 views

Solar not producing 24V all the time [duplicate]

We live in a moderately sunny place. We do get some cloudy days frequently. I have seen the output to go above 24V(like25V) on a fully sunny day middle of the day which means lots of days the solar ...
1
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2answers
76 views

Solar panel does not charge after lipo battery is low

I am trying to run arduino with solar panel, I have a project for farming so electrcity is problem. I need to use a independent energy. I bought Solar Power Manager 5V SKU DFR0559 and a 2000 mAh LiPo ...
0
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0answers
70 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 ...
2
votes
1answer
68 views

Solar load sharing for an MCU

I understand P Channel MOSFET operation and was reading this question which shows this circuit: but I wasn't sure whether this can be used to load share with an MCU such as Arduino or ESP32 which ...
0
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0answers
49 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 ...
0
votes
1answer
36 views

reduce voltage for inverter in solar system

I have a solar system (solar panel, controller, battery and inverter). Battery have standby use 13.6-13.8V, cycle use 14.5-15V. I set the charging voltage to 13.8V. The problem is that inverter to 230 ...
0
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0answers
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 ...
0
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0answers
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 ...
0
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2answers
66 views

14500 vs 18650 charge circuit

General question: Is the charge circuit/protection circuit the same for a 14500 and 18650 cell? (I assume so because of the same nominal voltage, but wanted to make sure) My specific case: https://www....
2
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2answers
106 views

How do I match a battery pack voltage to my solar panels?

We're building an autonomous boat which should be powered by solar panels. We want to put two 100W solar panels on it. Most panels I see are 18V and for redundancy we want to link them in parallel. ...
1
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1answer
75 views

Solar panel charging issue [closed]

I have a 160W solar panel that has a built in regulator that I have hooked up to a 100Ah 4 cell Lithium Ferro Phosphate battery. When I connect them the panel starts charging anywhere between 5 - 7 ...
-3
votes
1answer
101 views

Paralleling of battery chargers [duplicate]

Can we parallel the bbattery chargers suppose buck controllers.Two buck controllers taking power supply from the same power bus. The output of each controller will charge the batteries connected at ...
0
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2answers
49 views

Should I connect 4 solar panels (3.6v 900/1A) in parallel, in series or independently to the PCB to gain better power outcome?

Good morning, I have 4 solar panels with 3.6v 900/1A each, ~3.4W. I would like to connect them using a PCB to be able to charge an internal lipo battery, a smartphone or other devices. My question is: ...
0
votes
1answer
47 views

What size of fuse do you put between 330w 9.08 solar and 12/24 auto charge controler [closed]

Please help me with my question. I have a 330w solar panel and how do i know the correct fuse size to put between the solar and the charge controller. Also fuse size between the charge controller and ...
0
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2answers
51 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 ...
0
votes
1answer
53 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? ...
0
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0answers
76 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 ...
0
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0answers
40 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 ...
0
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0answers
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. ...
0
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0answers
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 ...
2
votes
1answer
52 views

Constant or variable current when using a solar charger?

I am looking at the CN3083 chip to charge a LiPo battery using a small solar panel (5V 0.15W). To set the charging current, the pin ISET is used with a fixed resistor, to set the constant charge ...
0
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0answers
28 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 ...
0
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2answers
111 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 ...
0
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0answers
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 ...
0
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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 ...
0
votes
1answer
81 views

Can you prove that electricity was generated by a photovoltaic cell?

I am wondering if it would be possible to build a photovoltaic cell that kept track of the electricity it generated (perhaps with a built-in meter), such that you could not trick the meter without ...
0
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0answers
34 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 ...
0
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2answers
254 views

Can a 12 volt voltage regulator be used to charge a 12 volt battery system using solar panels

I have a 3 X 18650 battery set with bms. I would like this to be charged using a 12 volt solar panel which outputs anywhere from 15 to 20 volts. the BMS has a max voltage rating of 12.8 volts. I was ...
0
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0answers
53 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.
2
votes
1answer
266 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, ...
0
votes
1answer
197 views

Will 14.4 volts from my solar charge controller damage my 12v equipment?

My charge controller is set to recharge my battery bank and begin a float charge at 14.4 volts. If I use some of my 12 volt components during the day while the batteries are charging, will this high ...
0
votes
1answer
221 views

How to Increase Solar Charge Controller Output Amps

I am new to solar panel system set ups, and I'm trying to make an off-grid DC-DC solar panel system where in I will be running a bunch of 12v loads which are mainly DC Pumps cause its gonna be ...

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