[RE-wrenches] SOC and LFP batteries and TriMetric

[Sindelar Solar]

Wrenches,
I  would like to broaden this topic a bit, please: we're currently 
installing our first Blue Ion LFP set (48kWh). I work almost exclusively 
with existing off grid systems, often older systems most of which have 
TriMetric monitors, either the TM2020 or newer TM2030. Has anyone 
successfully reprogrammed a TriMet to accurately register SOC and other 
data with LFP batteries? If so can you provide some guidance as to 
program settings?
Thank you,
Allan

On 8/20/2018 6:15 PM, Lou Russo wrote:
> Jay,
> The batteries are Blue Ion 2.0 from Blue Planet Energy, the 8kWh 
> cabinet. The listed Maximum Continuous Charge and Maximum Discharge 
> Rate is 1C.
>
> Aloha,
> Lou Russo
>
> On Sat, Aug 18, 2018 at 6:27 AM Jay <jay.peltz at gmail.com 
> <mailto:jay.peltz at gmail.com>> wrote:
>
>     Hi Lou,
>     Can you tell us which LFP batteries?
>     And what rates of discharge/charge?
>     Jay
>     Peltz power.
>
>     On Aug 17, 2018, at 12:09 PM, Lou Russo <lou at spreesolarsystems.com
>     <mailto: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
>
-- 

*Allan Sindelar*
allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*

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