cost per kWh [RE-wrenches]

[Bill Brooks]

Todd,

I agree they are quite significant. I'm not sure who has accurately tested
the MM-5 night losses. The batteryless Vanner was actually the same as the
SW in my testing. The SunnyBoy completely shuts down at night and
disconnects from the grid completely (no transformer losses). Anybody have
information on the MM-5.

Bill.

-----Original Message-----
From: Todd Cory, Mt. Shasta Energy Services
[mailto:toddcory at finestplanet.com]
Sent: Monday, June 02, 2003 3:08 PM
To: RE-wrenches at topica.com
Subject: Re: cost per kWh [RE-wrenches]


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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