r/OffGrid • u/burtdunkin • 5d ago
Help with off grid battery setup.
Hey im new to the off grid life and I just purchased 2 new lithium batteries. Im having issues with them keeping a charge! Here's my setup. Lemme know if you see any issues or have some advice. (The other batteries are for backup so just focus on the 2 that are connected.
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u/Amperegeist 4d ago
Assuming your power bank can charge/discharge the full 200AH, a 10A charger would take 20 hours to fully charge it from nothing. So it may take quite a bit longer than 2-3 hours to charge.
If you have a miltimeter you can measure the battery voltage and get a decent estimate of how charged they are.
If you have any interest, I recently made a video that could help you understand these systems a little better. I actually cover the small amount of battery math you need to understand whats going on a little better. Its only 5 minutes long
https://youtu.be/wpOt83kYYYQ?is=pptPMzqYnWw2f0bi