Questions tagged [solar-charge-controller]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
2 answers
56 views

Determine voltage and current for given I-V curve

Excuse me for my noob question, I'm new with solar panels. I'm trying to understand what value of current\voltage a charge controller gets in a given moment. Lets say that on given temperature and ...
user avatar
0 votes
0 answers
28 views

LiFePo4 Battery management system

I am creating a 2Ah 3 cell LiFePo4 battery using individual lifepo4 batteries, for a project that requires solar charging from a genasun mppt controller. Considering the battery is split into 3 cells, ...
user avatar
0 votes
0 answers
34 views

Connecting LiFePo4 in series?

I am looking for 3 LifePo4 batteries for a project, since they are quite stable when compared to Li-po/Li-ion. I have found this battery that fulfils the max amp draw requirements. I need three in ...
user avatar
0 votes
1 answer
45 views

Matching Solar Panel to TP4056 Charge Controller

I would like to match solar panel (6 V\1000 mA) to charge controller based TP4056 in order to charge 18650 battery around 3200 ...
user avatar
0 votes
0 answers
66 views

Switching between two circuits with DPDT with minimal current consuming

I am trying to design a system that will be powered by solar panel and 3.7v lithium batteries only. Im not electrical engineer, ...
user avatar
0 votes
4 answers
47 views

Can I use a PWM solar controller for charging a 24V battery from a 50V solar panel

I have a 460W solar panel with 50 Voc (open-circuit voltage), and a 24V battery bank. I'm thinking of using a PWM (60A) controller to charge this battery bank. My understanding with PWM is that it ...
user avatar
0 votes
1 answer
47 views

Charging batteries with both an inverter and solar panels

I have an inverter, a battery bank, a PWM solar controller, and some solar panels. The inverter also supports charging the batteries from the mains power. So if I just plug the inverter into a wall ...
user avatar
0 votes
1 answer
45 views

CN3722 External MOSFET heating up

In my charging circuit, CN3722 is used as the charging controller where I'm using an external MOSFET FDS4435bz as per it's application. Earlier I was using DMG2307L-7 which was heating up(50°C). To ...
user avatar
0 votes
0 answers
18 views

MPPT charge control voltage drop

What would explain a voltage drop on the load side of a MPPT solar charge controller? My power source is not actually a solar panel, but a 12v 300watt DC power supply. At present there is no battery ...
user avatar
  • 143
0 votes
0 answers
39 views

Charging a supercapacitor bank from PV

Have a small 5w PV panel with maximum power output around 16.77v@0.32a, and a no load voltage of around 20v. I'm getting an appropriately 100F 16v supercapacitor array with integrated balancing board. ...
user avatar
0 votes
0 answers
29 views

Plugging an MPPT controller into another MPPT controller

I am installing a CTEK D250SE charger into my camper trailer. The D250SE contains an MPPT controller for charging from a regular solar panel. The catch is that my existing solar panels already have an ...
user avatar
0 votes
0 answers
30 views

Using an existing MPPT charge controller and solar panels with new battery pack

I have an off-grid setup at the moment to power most of my DC devices (bulb, router, NAS, NVR, etc.) I'm planning to upgrade my setup to a more powerful AC off-grid system to power my entire house. My ...
user avatar
1 vote
1 answer
61 views

Keeping sealed lead acid battery bank in good condition - and science behind

I will have 2 lesuire batteries on the boat. The bank will be 12 V and 150 or 220 Ah (not sure yet). I am trying to find out if constantly delivering low current (say 0.1) before charged and later ...
user avatar
  • 111
2 votes
1 answer
43 views

Can I use 10A solar controller with one 445 watt panel

I am wondering if I can use 10A PWM controller with 445 watt or 625 watt solar panel.
user avatar
  • 121
1 vote
2 answers
58 views

Can I estimate irradiance from photovoltaic panels' output data?

I'm trying to figure out a way to estimate irradiance from the data I get out of photovoltaics panels; irradiance, or any other variable that would be appropriate to my use case/context, which I hope ...
user avatar
2 votes
3 answers
388 views

Why doesn't the voltmeter show the charging voltage when connected to a solar controller's battery connection?

My understanding is, for charging to occur, a solar charge controller needs to output at a higher voltage than the battery's voltage. If so, why, when you test the battery connection of a solar charge ...
user avatar
0 votes
0 answers
46 views

Can a PWM solar charger use a battery as the source?

For background, I am slowly migrating from 12v to 24v, but want to use my existing 12v inverters if possible, by having a 12v battery kept topped-up by the 24v batteries. I have a decent MPPT ...
user avatar
0 votes
1 answer
45 views

Connecting an Arduino to both panel and load side of charge controller, can this work?

I just joined this site because my searches haven't turned up an answer to this question, so apologies in advance if I missed something. I have an Arduino powered by the load side of a 12V solar ...
user avatar
0 votes
1 answer
29 views

Solar charging portable 3S2P Li-Ion battery powered equipment

We have experiment and lighting equipment for outdoor use, using 3S2P Li-Ion battery packs quite similar to these (12,6V max. charge; 11,1V nominal; 9,4V cut-off) that we want to charge from solar ...
user avatar
1 vote
0 answers
39 views

Adding 12V power supply to existing Solar MPPT load circuit

I have a camper which has a small 12v power system consisting of a 50w solar panel, a generic 20ah LiFeP04 battery, an a 15A Victron MPPT controller whose 12v load output feeds directly to a fuse ...
user avatar
  • 11
0 votes
1 answer
59 views

Reduce voltage, maintain current

I’ll be frank, I messed up. I’m installing a solar system in my camper van and bought a combined solar MPPT charge controller and DC/DC charger. Unfortunately I didn’t notice the max solar input for ...
user avatar
0 votes
1 answer
103 views

CN3722 solar controller - What MOSFET should I use?

I need to know what P-channel MOSFET to use with a CN3722 to charge two 18650 batteries. The datasheet doesn't say what MOSFET to use. My solar panel parameter are: maximum power 10w maximum ...
user avatar
1 vote
2 answers
99 views

CN3722 solar controller does not stop charging

I have this custom PCB witha CN3722 module. I charge two 18650 batteries. Resistors XVR7 and XVR6 are calculated for 8.3 volts. The charger charges the batteries and the "done" LED turns on ...
user avatar
0 votes
0 answers
29 views

Solar Battery Charging Circuit

I designed this circuit: to charge my 12 V UPS battery from a 40 W, 18 V solar panel. I specifically included an LM317T adjustable voltage regulator to control the output voltage to about 13.4 V as ...
user avatar
-1 votes
1 answer
71 views

12V DC to DC converter used in place of solar charge controller [closed]

I bought this product to use as solar charge controller. My circuit consists of: 12V solar panel (5A?) -> 12V (DC->DC) voltage converter -> 12V 35Ah SLA battery The converter says its input ...
user avatar
0 votes
1 answer
51 views

SPV1050 Harvester IC MPPT Setup

I have been trying to use SPV1050 Harvester IC with a solar panel to charge a Li-Ion battery. However I am having problem deciding the resistor values for the MPPT pins. In section 6.4-MPPT Setting of ...
user avatar
0 votes
1 answer
64 views

Running load directly off solar panels (bypassing charge controller) - Silicone heater

I am working on a solar setup that is powered by a Li-ion batteries. However, Li-Ion batteries can't be charged below 0 deg C, and thus if it dies in the winter, it will need to be warm before it can ...
user avatar
0 votes
1 answer
97 views

How a 10w solar panel charge a 12v battery through a solar charge controller?

I am newbie in electrical engineering. Recently, I ordered a solar DIY kit package which includes a solar panel(10W, 12V, 1A), a solar charge controller and an inverter(DC 12V to AC 240V). I plan to ...
user avatar
  • 203
0 votes
0 answers
40 views

Is it ok to charge a 12v battery with an AC to DC adapter and an solar charge controller?

I don't have solar panel. I want to charge a 12v battery from the power supply on the wall. My plan is connecting an adapter (AC 240v to DC 12v) and a solar charge controller to charge the battery. Is ...
user avatar
  • 203
0 votes
2 answers
67 views

I have made a 50W solar mppt charge controller, but don't have a solar panel. What can I use to replicate this without a solar panel

It's a 50w solar charge controller. I'm using an Arduino-based system with the ACS712 current sensor. What other inputs could I use to replicate the functioning of a solar panel to test the ...
user avatar
0 votes
1 answer
47 views

Camper battery charge

in a Camper we usually have many different way to charge the battery (in my case LiFePO4): Solar Plug Engine It may happen that 2 or more are charging at the same time (for example the Engine and ...
user avatar
  • 1
0 votes
0 answers
34 views

Charging a 12vdc lead-acid battery bank with two different power sources (solar & wind)

Looking to upgrade an existing solar system with two (2) 285W panels going through a 40A MPPT solar charger. The solar charger is charging 4 6v lead-acid deep cycle batteries. ((Cell 1 + Cell 2) || (...
user avatar
2 votes
1 answer
103 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. ...
user avatar
  • 123
0 votes
2 answers
85 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 ...
user avatar
0 votes
1 answer
142 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 ...
user avatar
0 votes
2 answers
103 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 ...
user avatar
0 votes
2 answers
444 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 ...
user avatar
0 votes
1 answer
51 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 ...
user avatar
0 votes
2 answers
59 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 ...
user avatar
  • 553
1 vote
1 answer
241 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 ...
user avatar
  • 121
0 votes
2 answers
40 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"...
user avatar
  • 49
0 votes
1 answer
32 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 ...
user avatar
  • 42
0 votes
1 answer
75 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 ...
user avatar
1 vote
1 answer
59 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 ...
user avatar
0 votes
0 answers
149 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 ...
user avatar
  • 1
0 votes
1 answer
67 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 ...
user avatar
  • 65
0 votes
2 answers
57 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 ...
user avatar
0 votes
0 answers
248 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 ...
user avatar
1 vote
1 answer
115 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 ...
user avatar
  • 11
0 votes
0 answers
39 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 ...
user avatar
  • 23

1
2 3 4 5