In the aftermath of comparing inverter performance it was clear that
a change was needed. So I replaced four Xantrex inverters with three
Sunny Boys.
The mounting technique was much simpler. For each
inverter I attached two channels to the vertical posts, properly spaced
for the inverter's mounting holes. A third channel was needed to support
the external DC disconnect (Square D HU361RB). The Xantrex
inverters include their own internal DC disconnect.
Three of the Xantrex inverters were each wired to five strings of 4
PV panels and the fourth was wired to three such strings. The Sunny Boys
required remapping, each with a single string of 24 panels.
All the DC wiring had to be re-installed.
The upgrade created a lot of leftover wire, which reduced wire
losses significantly.
And there was some other scrap generated. It would have
been nice to have not purchased this to begin with.
