[RE-wrenches] 600Vdc Transfer Switch Between Charge Controller and GT Inverter

[Matt Sherald]

Hi All,

I've been asked to review a GT-BBUS that was installed with a DC to AC
ratio of 2.14.  The system owner is frustrated b/c his 9.2-kW of PV  is
bottlenecked by an 80A MPPT (~4,300W).  The inverter is a XW-5548 so there
is a second bottleneck to overcome even if an additional CC were added.

My inclination is to install a GT inverter for half the array and make a
separate point of connection.  I have considered adding a transfer switch
on the PV conductors to allow the owner to toggle between this new GT
inverter and the existing CC.  I thought that having the option would be of
benefit during extended outages with little sun.

I'd be curious to know if anyone has had to solve a problem similar to this
one and if they were able to find a suitable switch.  To-date, I have not
located a good transfer switch or breaker assembly with handle-tie etc...
Any thoughts are greatly appreciated.

-- 
Matt Sherald
PIMBY Energy, LLC
NABCEP Certified Solar PV Installer®
304-704-5943

www.getpimby.blogspot.com
www.getpimby.com
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