Power Point Tracking Controllers [RE-wrenches]

[Steve Bell, Sunwize Technologies]

Hi Jeff,
I have been running a grid-tied (sell-back) SW/battery system using a Solar
Boost 3048 controller. It has been working fine for several years now. I
typically see a 20%-30% increase in input amps during the cooler months and
a 5% to 10% increase during the summer months. I have SB3048 set in Bulk at
56 volts, the SW is set to Sell at 53.6 volts. The PV array wired for a
nominal 48-volts. I'm located in Stelle, IL (about 90 miles south of
Chicago).

What MPPT controller were you using and why did they have you increase the
nominal array voltage?

Sincerely,
Steve Bell
SunWize Technologies
sebpv at stelle.net

----- Original Message -----
From: "Jeff Yago" <jryago at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Friday, June 14, 2002 9:54 AM
Subject: RE: Power Point Tracking Controllers [RE-wrenches]


> I know we have had some past discussion in past threads about advantages
of
> power point tracking charge controllers with some systems, but I just
> replaced 4 "fried" almost new MPPT controllers with C-40's on same four
> arrays and battery banks and have had no more problems. We did re-circuit
> all module strings to get voltage down to 48 volts for the C-40's from the
> higher voltage string circuits recommended by controller manufacturer.
> Battery stayed 48 volts.

> I know many are sold on these for no battery solar system selling to grid,
> but I do not think the added cost is worth the headaches we are seeing
when
> trying to use them on the type of systems we install.  What say yea?
>
>
> Jeff Yago
> Dunimis Technology Inc.

- - - -
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
==^================================================================