[Fwd: [GBlist] Inverters that both charge battery banks and the grid?]

[Ron Byrd <byrdelc@directcon.net>]

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• To: Bill Dorsett <dorsett@interkan.net>
• Subject: Re: [GBlist] Inverters that both charge battery banks and the grid?
• From: Ron Byrd <byrdelc@directcon.net>
• Date: Tue, 29 May 2001 18:39:33 -0700
• Organization: Byrd Electric
• References: <3B0E72F1.442EC345@interkan.net> <3B0F072E.82FC2AF3@directcon.net> <3B13CD81.F0DE5CF2@interkan.net>

Bill Dorsett wrote:


>
> You mention the blue/black background of the Astropower modules. I agree aesthetics are crucial for
> many families

go to this site for panel spec's http://www.astropower.com/ap100.htm

> but I would be interested in the high temp performance of these modules compared
> to their STC performance.

Standard Test Conditions: Irradiance = 1000 w/m2; Cell Temperature = 25oC;
                      Solar Spectral Irradiance per ASTM E892 (1.5 air mass)

Every manufacture uses the STC to rate there panels. This is a means of comparison and can not be used
when calculating actual performance.

Go to this site and you will find every thing you need to know about the BATTERY system performance
http://www.astropower.com/sunups.htm If you scroll down to mid screen there is a map and a chart of
the different system outputs. These numbers are based on actual conditions, all efficiency factors
have been included.

If your customer is interested in an on grid system that will provide supplemental power then you
should look at this site http://www.astropower.com/sunline.htm Same charts but no batteries.

>
> Especially in Southern Cal, this performance would be critical in cost per watt. Some lose 20%
> when operating temps reach 50 degrees C.

You can loose power if you do not aim the panels south. Also if the DC wire is to small. I use a
minimum #10 XHHW-2 from the panels to the inverter. Keep the DC runs as short as possible to avoid any
excessive voltage drops.
--
Ron Byrd
Vice President
Sunstar Precision Energy Corporation
http://www.specbyrd.com
" Turn Sunlight into SPEC Energy "

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