[RE-wrenches] Battery Monitor for Li

[Matt Sherald]

Hello Friends,

I have an off-grid customer for whom I recently installed some SimpliPhi
3.8kW batteries.  This is an older system and it has a Trimetric battery
monitor that the homeowners have used for years to keep an eye on their
battery bank.

The SimpliPhi batteries appear to be working fine at the site, but the
homeowners feel uneasy b/c the Trimetric is reporting that they are
finishing each charging cycle with an amp-hour deficit.  The voltage of the
SimpliPhi batteries indicate that they are getting fully charged and are
doing so fairly early in the AM (solar is the primary power source).

I've spoken with SimpliPhi tech folks and their hunch is that the Trimetric
is not reporting correctly.  They suggested that a Victron BMV-712 would be
more accurate at tracking Percent Full etc...

Do you folks think that the Victron is better at counting Ah in/out for Li
batteries?  Or is the Trimetric adequate - do I maybe just need to adjust
the settings?

Anyway, the implication that the Victron BMV was better at monitoring Li
batteries has me curious and I will enjoy hearing what the group thinks.

Thanks for your time!

-Matt



-- 
Matt Sherald
PIMBY Energy, LLC
304-704-5943

www.getpimby.blogspot.com
www.getpimby.com
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