On grid w/battery [RE-wrenches]
jberdner at sma-america.com
jberdner at sma-america.com
Tue May 28 14:59:52 PDT 2002
Wrenches:
I have some data from a module manufacturer which compares the output of
two systems in Sacramento, CA. One is for an SW with batteries operating
in surplus sale mode. The other system is a Sunny Boy grid tied system.
This is their data, not mine, so I can not publish it without permission
(which I will try to get). In summary, the SW system produced about 80%
of the output of the Sunny Boy (arrays normalized to kWh per kW).
Unfortunately you loose another 30% in tare losses at night so the net
effect is that the battery based system is producing about 50% of the
power of the straight grid tied system.
As my boss in Germany says:
If you want a PV system then buy one.
If you want a UPS system buy one of those too.
Best Regards,
John Berdner
-----Original Message-----
From: Joel Davidson [mailto:joeldavidson at earthlink.net]
Sent: Monday, May 27, 2002 6:39 PM
To: RE-wrenches at topica.com
Subject: Re: On grid w/battery [RE-wrenches]
Bill,
If I go with a non-battery inverter, I'd keep my SW4048 and use it for a
non-PV
UPS. The SW harvests 2700 kWh/year, but I wouldn't mind another 135
kWh/year
plus approx. 80 kWh/year that the SW consumes floating the battery at
night. I
think a non-battery inverter would harvest approx. 3000 kWh/year from a
2200 WDC
STC array at a 12 degree tilt in Los Angeles. Does anyone still use the
old
UT-SW4048PV non-battery model? If yes, what size array and how many kWh?
Bill Brooks wrote:
> Joel and Marco,
>
> With all do respect to my friends at Advanced Energy, the old SW is
our most
> stable inverter on the market.
- - - -
To send a message: RE-wrenches at topica.com
Archive of previous messages: http://www.topica.com/lists/RE-wrenches/
List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm
Check out participant bios: www.mrsharkey.com/wrenches/index.html
Hosted by Home Power magazine
Moderator: michael.welch at homepower.com
- - - -
To send a message: RE-wrenches at topica.com
Archive of previous messages: http://www.topica.com/lists/RE-wrenches/
List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm
Check out participant bios: www.mrsharkey.com/wrenches/index.html
Hosted by Home Power magazine
Moderator: michael.welch at homepower.com
==^================================================================
This email was sent to: michael.welch at homepower.com
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email to: RE-wrenches-unsubscribe at topica.com
T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================
More information about the RE-wrenches
mailing list