Battery Fuel Gauge [RE-wrenches]
Todd Cory, Mt. Shasta Energy Services
toddcory at finestplanet.com
Sun Nov 5 20:37:47 PST 2006
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In my case #1 is wrong. All the systems I install that have batteries,
have an amp hour meter (link-10) that does a very good job of tracking
battery soc. Modern meters recalculate the battery efficiency (which
includes self discharge) every time they are fully charged. That kind of
takes out item 3 below as well.
Todd
Joel Davidson wrote:
>
> All,
>
> To summarize:
> 1) Almost all PV/battery system owners do not know or only roughly
> guesstimate their battery SOC.
> 2) Some Wrenches like the Trimetric meter and a few like the e-meter.
> 3) There is no simple plug-and-play battery fuel gauge that does not
> require programming and still may be inaccurate because of changing
> battery age, charge/discharge patterns, self-discharge rate, temperature.
> 4) Some Wrenches make scheduled or occasional service calls to inspect
> and test their customers' systems and batteries.
>
> Did I miss anything? Is there any more to say?
>
> Thanks for your input.
>
> Joel Davidson
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