Solar Charge Controller
|DIY Solar Charge Controller|
Release status: experimental [box doku]
|Description||Trying to build and optimize a DIY solar charge controller|
There are plenty of cheap solar charge controllers out there, but most of them are crap, or just don't really fit our use-cases. And the good ones are expensive. So let's try to DIY one.
- PWM is ok, MPPT would be much better
- Up to 32V battery voltage would be nice (24V Lead-Acid, 7S Lithium battery packs)
- Free selection of cutoff voltages to accomodate different battery configuraitons (e.g. 3S/4S Lithium packs)
- Data logging/telemetry
"Fancy" PWM controller
Starting point for the first shot at this is Open Green Energy's ARDUINO PWM SOLAR CHARGE CONTROLLER ( V 2.02) instructable. I started ordering some parts from AliExpress, and now "just" need to get the PCB manufactured and we should be good to go.
There were a few people who had shown interest in this project, so I ordered a bigger set of parts.
- Sebastian (only if MPPT)
Taken from the instructable, needs some better specification for sure.
|MP2307||1||❌||-||?||step-down should be fixed to 5V for arduino supply? or better adjustable ones?|
|DS18B20||1||❌||-||Reichelt?||temp sensor for battery? maybe he meant this|
|Ceramic Capacitors (0.1uF x 2)||❌||-||Reichelt|
|LCD I2C Backplane||1||✅||6||AliExpress|
|Jumper Wires||❌||-||AliExpress?||which length? what for?|
|Fuse Holder||1||✅||10||AliExpress||incl. cover|
|Fuses||1||❌||-||Reichelt||No details as to what kind of fuse. Going with 4A fast blow for now|
|Screw terminals 1x6 pin||1||✅||10||AliExpress|