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ASE Module Quality

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Posted by Ron Rosenfeld on August 3, 2003, 7:28 pm
Anyone know anything about ASE large wattage modules?  (Now RWE Schott).  I
see some 195W @ 34V modules for sale for a good price.  The dealer says
they would work fine in a 48V system (wired to 68V) with an MPPT

Comments would be welcome.


-- ron  (off the grid in Downeast Maine)

Posted by Eric Scott on August 4, 2003, 12:14 pm
Has ASE been sold?   I didn't know that!

Posted by R. H. Allen on August 4, 2003, 3:18 pm

I don't remember the full story, but as I recall it's simply a name
change to that of the parent company. The German ASE became RWE nearly
two years ago, while ASE Americas changed its name fairly recently. I
don't think there was a sale involved, or at least if there was it
happened in 2000 or 2001.

Posted by Steve Spence on August 4, 2003, 11:37 pm

Steve Spence

Posted by Anthony Matonak on August 4, 2003, 2:43 pm
 Ron Rosenfeld wrote:

It sounds like you are talking about their off-spec panels. The 300 Watt
48V panels ASE makes have 6 bypass diodes in a junction box on the back.
Defective panels usually only have a few cells which are open-circut or
in some other way do not work correctly. Due to the design of these
panels they can bypass 1/6th of the panel simply by shorting across the
relevant bypass junction. This means that although 1/6th of the panel
may not work, the other 5/6th's does. You just lose 1/6th of the voltage
and current that the panel would have produced. The panels remain
defective, in part, and will take up more space due to the dead sections
than their regular panels.

This is a good deal if you are using a 600V DC system such as the
sunnyboy inverters take or have a MPPT that can deal with a little
less voltage. You typically also have to buy these panels in groups
of 20 or by the crate.


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