cost per kWh [RE-wrenches]

[Joel Davidson]

The Brand meter only measures DC power into the battery bank, not the inverter
tare.

Bill Brooks wrote:

> Joel,
>
> With all do respect to Ethan's excellent meters, yours is not accurately
> measuring the power consumption to maintain float charge. Although it does
> not take much power to float some batteries, the power to keep the inverter
> running and maintaining voltage is 40-50 Watts at night. During the day any
> current needed for float comes from the array.
>
> Bill.
>
> -----Original Message-----
> From: Joel Davidson [mailto:joeldavidson at earthlink.net]
> Sent: Monday, June 02, 2003 7:39 PM
> To: RE-wrenches at topica.com
> Subject: Re: cost per kWh [RE-wrenches]
>
> I am monitoring my SW4048 system with a Brand meter. Float charge input from
> the
> grid has been averaging around 250 watt-hours per month (much less than I
> thought). My 4 each 12-volt 86 AH Johnson Controls sealed batteries just sit
> there
> waiting for power outages and there have been no outages for the past year.

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