[RE-wrenches] The Tri-Metric TM-2030-A and LFPs

[Ray]

Another shout out for  the Trimetric folks.  They revised the manuals 
recently as well, nice job.

Ray Walters
Remote Solar
303 505-8760

On 6/4/21 1:13 PM, Sindelar Solar wrote:
> Lou,
> I spoke this morning with Kedar, who purchased Bogart Engineering 
> several years ago, about an out-of-warranty repair on a TM-2030 
> (Stupid human trick - after installing maybe 100 TriMetrics over 30 
> years I wired a new one backwards). Remembering your post I asked him 
> about settings for lithium batteries in general. I have done this 
> successfully with several Blue Ion LFP battery replacement installations.
> His recommendations:
> - set voltage to the BMS voltage regulation setpoint (55.2 for Blue Ion)
> - set amps either Off or to a high (5-10%) to disable this parameter
> - Set CEF to 98-99%
> - set battery AH capacity to actual rated capacity @100% DoD
>
> I checked records for a couple of my own 2018 installations (Both of 
> these had existing TM-2020s rather than TM-2030s, which shouldn't make 
> any difference in their settings and operation.):
> - I set voltage a bit lower - 54.0 and 54.5
> - I set amps off in one case and 8A in the other
> - I set a large (24 kWhr) CEF to 98% and a smaller (8 kWhr) set to 95%
> And both have continued to supply accurate and usable info to the client.
>
> By the way, I was initially disappointed to learn that Ralph Hiesey 
> had sold his business and retired. I have recently, however, received 
> excellent customer support from Kedar, the owner of Bogart 
> Engineering, and wanted to pass that good review along.
> Allan
>
> On 6/4/2021 12:16 AM, Lou Russo wrote:
>> Aloha All,
>> Does anyone have experience with the TM-2030's SOC accuracy when used 
>> with LFP batteries that they are willing to share?
>> I would think the TM-2030 would be accurate but I just want some 
>> confirmation.
>> Thanks.
>> 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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