Forum Discussion
otrfun
Apr 27, 2021Explorer II
FWC wrote:Yup, the Trojan Trillium spec sheet is very telling. Thanks for the link. They recommend a max. of .13c charge from 0c to 5c. Jumps up to .5c from 5c to 23c. I can see why there's general agreement that <0c should be the cut-off for charging. .05c charge from -10c to 0c is bordering on a trickle charge.
Also to add, Trojan is one of the few battery assemblers to actually provide a real spec sheet for their LiFePO4 batteries:
Trojan Trillium Spec sheet
They spec charging at 0.05C down to -10C, and no limits on discharge down to -20C. As these are warrantied batteries, this is likely conservatively rated.
Most folks don't have programmable chargers so they can limit charge current to a specific amount. Based on Trojan's spec sheet I may consider changing the low-temp cut-off for charging our 200ah LifePo4's with our 45a converter a bit higher than its current 0c (32f).
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