Hmm, new LiFePO4 batteries say they need 20A to charge (ideally).
My solar panels at this time of year are barely eking out 1.5A.
Also, operating temps are 50F+, and outdoors overnight is 44F... the shed is warmer, but not THAT much warmer.
So, plan B - going to use them with an AC charger (additional 12V standby here) until I straighten out the solar power situation and rethink how to do this... 🤔 Not a problem, part of putting these projects together is better understanding the problems/challenges/design parameters. #electronics #batteries #solar
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W6KME
In response to this post@ai6yr I initially had a bit of mental trouble with LifePo4 charging until I realized they just need a bit more wellie to shove the electrons in. It's not like lead acid, where higher voltage is enough. I don't know if that's due to internal resistance or BMSs or whatever...haven't bothered myself with that-I just got the recommended charger.
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Scott Francis
In response to this post@ai6yr where'd you source your batteries, and what's the total storage capacity? I'm planning out a similar project at my place for hopefully later this summer.
@darkuncle Turns out that (unfortunately) the easiest source for them are 3rd party sellers on Amazon. Went for some batteries people here have been using with no issues (so far) Redodo (all these are Chinese sellers).
by AI6YR Ben ;
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tk
In response to this post@ai6yr dunno what battery you got there, charging my 35 kWh LFP most of the time in winter with way lower amps than 20? Also never heard of this problem before?
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