I have two seperate solar panels with exact same circuitry connections. This is what I have:
I want to power my board that needs 5v 1-2amp (varies) for as long as possible. My 18650 batteries are 5000mah each.
So I'm going to connect both positive OUTs from TP4056 pins combined together to LM2596 switching voltage regulator and two negative pins from two of my TP4056s to negative IN on LM2596 and set the output voltage of LM2596 to 5V. LM2596 support up to 3A which is great and more than what I need.
Do you see any problems with my board/method? My board will be outside all day, during daytime I think my board will mostly consume the direct solar power and during night it will use power form 2x5000mah 18650 batteries.
If you see inefficiencies, problems, things I can add to improve safety and power efficiency, please share them with me. Thank you
P.S. Each of my solar panels are 6V 1A 6W panels
2xPanel -> 2xBuck Boost -> 2xTP4056 -> 2x18650 5000mah batteries
Outs of 2xTP4096 combined together will be connected to LM2596 and then to my 5V 1-2A board.