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

[Tump]

Yep its is terrible! Spoke w/ a former member of their (OB)’s tech support and was told that the counting of amp hours both up & down drifts so you have to recalibrate monthly.
This IS something OB is aware of and has no interest in addressing. Thoughts…. remove and when you find a device that I am able to install and get accurate info on multiple shunts to trigger gen start let me know.T  
> On Aug 17, 2018, at 3:09 PM, Lou Russo <lou at spreesolarsystems.com> wrote:
> 
> 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 <mailto:lou at spreesolarsystems.com>
> 808 345 6762
> Spree Solar Systems LLC 
> CT-34322
> 
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