[RE-wrenches] SOC, FNDC, and LFP batteries

[Lou Russo]

Hello All,

Does anybody have any insight in getting the SOC to report accurately on
the Outback FNDC when using batteries that have a minimal voltage curve? I
have several systems with LFP batteries that have both a eGauge
(communicating directly with the battery BMU) and a FNDC and I get wildly
different SOCs. In a typical  24 hour period (12am-12am) I get SOCs on the
FNDC that vary 2% to 34% of what the battery BMUs are reporting. I am
assuming that the BMUs are reporting accurately. I would think a 1%-5%
difference would be acceptable.

Any help or thoughts on this subject  would be greatly appreciated.

Aloha,

Lou Russo
lou at spreesolarsystems.com
808 345 6762
Spree Solar Systems LLC
CT-34322
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