MIXED PANEL ARRAY'S [RE-wrenches]

[allan]

Re Pringle's stuff, I have learned to wait awhile before using any new
product of his, to let others face what Jeffrey Wolfe described.  He seems
to get it right after a few revisions.  I got burned three years ago on a
few of his earliest MPPT units. I ordered his first 48V unit, I believe, but
got cold feet after two 24V units failed on another job, and sent it back.
Probably was a good call.  Once the bugs are out, it's good stuff--no
problems with his up/down converters or LCBs; lots of early trouble with his
SunRise pump controllers and converters, but none recently.

Allan @ Positive Energy
-----Original Message-----
From: Jeffrey Wolfe, Global Resources <global at sover.net>
To: 'RE-wrenches at topica.com' <RE-wrenches at topica.com>
Date: Monday, August 14, 2000 6:16 PM
Subject: RE: MIXED PANEL ARRAY'S [RE-wrenches]


>I'm going to be testing one of these MPPT's from Solar Converters again.
>While I like their other stuff, I tried using their high power MPPT units
>last year. Designed for 48 to 200 V in, 48 V out, 60 Amps. I burned up 7 of
>them, working with Dan Pringle all along to try to figure out the problem,
>to no avail. Had to get on a three story barn roof in December to rewire
>the array to 48 V. Threw in a couple of C-40s (slightly over limit at 42
>Amps) and the system has worked fine.
>
>Dan says he "found there was a bad batch". But I would not consider them
>"proven" yet. So I'll try one at home this time.
>
>Jeff
>
>Jeffery D. Wolfe, P.E.
>Global Resource Options, LLP
>A Woman-Owned Vermont Limited Liability Partnership
>4 Kibling Hill Road
>P.O. Box 51
>Strafford, VT 05072
>802/765-4632
>802/765-9983 (Fax)
>global at sover.net
>www.globalresourceoptions.com
>
>
>You might also look at the products from Solar Converters.
>Best
>Don Loweburg
>
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 michael.welch at homepower.com
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