Fair point about panel size convenience for layout configuration, particularly with limited mounting area.
They'd be 36V class panels, out of spec for this thread. Mppt is only option.
Old house panels are very cheap or ewaste in many areas but they should still be functional for many years.
What are your thoughts for the best way to use them?
I'll nominate the ReneSola 125 Series 200w panel as the basis of discussion. STC:
Pmax 200W
Imp 5.41A
Vmp 37.1V
Isc 5.7A
Voc 45.3V...
Thanks for keeping us updated on the project progress and the explanations.
Consider my use case a stress test. I assumed the other side of the planet, so reversed almost all your key assumptions in terms of solar radiation and heat, and assumed efficiency could be sacrificed. The sun still...
Can you explain a few things about the schematic assuming SZBK07 (U6) is used in a high solar input situation?
Are U1, U3 and U7 optional?
Where is U6 load Gnd?
Which Oled pins are used (assume I2C - vcc/gnd/sck/sda)?
LM75 temperature sensor for lead acid charging - I2C requires 4wires as above...
This project is basically assembling modules although the Drok power supply needs a hardware tweak (or use another power supply) and the voltage divider needs soldering. Fortunately, the voltage divider is only a few cents worth of resistors so you can practice as much as you like. Once it is...
That'd be https://github.com/rin67630/Soft-Power ?? I realise excessive heat is not an issue you are concerned about but it's good to see you value adaptable design.