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Old 08-01-19, 07:57 AM   #3
Daox
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Thanks for the info Mike! I looked around a bit. I still like the idea of a 1s4p design for simplicity and forgoing any balancing issues. The batteries vary from 17.6ah to 18.6 ah.

Here is what I found on single cell charge controller chips:
https://github.com/opensourcesolar/c...Po4-charge-ICs

I really like the idea of using a 12v panel and mppt charger because it will charge at least somewhat even during not ideal conditions. If I am going to use this year round I'll want to charge whenever possible. The LT3652 chip seems to do this and it looks like I can order a board from China for $20 or a bit less. However, finding info on the board is proving difficult.
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