cost per kWh [RE-wrenches]

[Jay Peltz, Peltz Power]

Hi Joel,

250 watt hours per month?

Thats 1 watt per hour, at 8 hrs day?

jay

Peltz Power
----- Original Message ----- 
From: "Joel Davidson" <joeldavidson at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Monday, June 02, 2003 7:39 PM
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.
>
> "Todd Cory, Mt. Shasta Energy Services" wrote:
>
> > Thanks Bill. I would have thought the SW would be far worse in
conversion
> > efficiency, so it is that stupid battery floating all night that really
is the
> > problem. I imagine Outback will be the ones to finally make a grid tie
machine
> > that is smart enough to know when it is not needed. 45 to 50 watts
continual
> > overhead is significant, especially during those dark winter months when
the
> > PV's don't even generate that much.
> >
> > Todd
> >
> > Bill Brooks wrote:
> >
> > > Todd,
> > > Night-time losses for the SW are measured at a continuous 40-45 Watts.
The
> > > SB is one big donut (no losses) at night.
> >
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