searching for news of Sunny Boy [RE-wrenches]

[Doug Pratt]

-----Original Message-----
From: William Miller [mailto:wrmiller at slonet.org]

<snip>The configuration has this disadvantage:  The only available unit
is 2500
watts.  It requires 24 12 volt nominal modules in series.  It has been
difficult for us to put together a scaleable package--one in which the
client can start with a smaller array and increase as funds allow.
<snip>

You can make the Sunny Boy 2500 slightly scaleable by using 75-watt
modules. Start with a single string, add a second string when money
allows. It'll comfortably accept two 75-watt strings of 21 to 23
modules.
Also, be careful about how many modules you put in a series string.
Depending on the particular module selected, and the climate, the
"correct" number can vary from about 18 to 24.  John Berdner has a great
little spreadsheet program for the SB2500 that'll keep you outa trouble.
Have him email you a copy.
-Doug Pratt

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