Battery Fuel Gauge [RE-wrenches]

[Joel Davidson]

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Hi Don - Thanks for the feedback. What battery fuel gauge do you recommend?

Wrenches - Do any of your grid-tie customers ever test their battery bank 
with a simulated outage, let alone on a regular basis? None of my customers 
do and some are real tinkerers.

Joel Davidson

----- Original Message ----- 
From: "Don Loweberg" <I2P at aol.com>
To: <RE-wrenches at topica.com>
Sent: Saturday, November 04, 2006 2:06 PM
Subject: Re: Battery Fuel Gauge [RE-wrenches]


>
>
> In a message dated 11/3/2006 8:20:53 AM Pacific Standard Time,
> danbob at otherpower.com writes:
> I usually recommend the TriMetric or Pentametric from Bogart
>
>
> Going back to Joel's original post-- The fuel gauge products already exist
> and I do agree that watts and watt hours are preferred for easy customer 
> use.
>
> One problem with systems that are grid connected and at float all the 
> time,
> is that indeed the meter has little function and as Bob-O already 
> remarked,
> does not account for selfdischarge.
>
> In my mind the only way to know capacity with sealed batteries is to
> excercise them by testing. Simulate an outage , note the loads, and then 
> see how long
> for the voltage to drop to a designated cutoff point. Then a person knows 
> how
> much backup to expect. Without testing on a regular basis, the reserve or
> backup capability of a grid connected system becomes unknown over time no 
> matter
> how well the original design attemped to predict it.
>
>
> Don Loweburg
>
> [Non-text portions of this message have been removed]
>
>
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