Kaneka GSA? [RE-wrenches]

[Brian Teitelbaum]

Doug,

Just to clarify:

If I'm reading the Square-D spec sheet correctly, the HU361RB fused switch
is not UL rated to act as a combiner for output to a single inverter, so it
can't be used to "combine" three strings. The lugs are rated to accept two
#12 or #10 wires, so you can combine two strings per pole, but each pole has
to output to separate inverters, not to one inverter. The fused version is
also only rated to carry 80% of it's rating (the non-fusible unit is rated
at 100% duty)

Here's a link to the Square-D HU361RB white paper:

http://www.sma-america.com/ftp/Square%20D%20HU361RB.pdf

The SMA Combi-Switch comes with 10A fuses, and larger fuses are not allowed.
This means that when using modules with an SC amp rating of more then 6.4A
(10A divided by 1.56 = 6.41A) you have to use a separate combiner. This
wouldn't be an issue with the Kaneka module, but since this module is only
60W, you will likely have more then four strings anyway.



Brian Teitelbaum
AEE Solar


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