Side of house - Main panel, utility AC disconnect, and DC Junction Box, Combiner boxes, PV/Combiner Ground junction box. AC wiring is 1/0 (sized for two 60A automatic transfer switch, one in each of 2 inverters). PV wiring is #6 pre-combiner, #2 post-combiner. Generator wiring is #6. Smaller conduit running along larger conduit to the generator has an ethernet cable in it.


The DC junction box next to the utility disconnect has 4 splice blocks to reduce the PV negative from #2 to #6, the maximum allowed for Xantrex charge controllers. PV positive uses the PV circuit breakers as splice blocks. The PV strings tied to each combiner box and charge controllers are completely isolated until they are combined post-charge-controller with sychronized voltage at the big DC bus bars in the PDP. Xantrex charge controllers do not support shared/common negatives with other charge controllers due to the way they do the GFCI fuses, with the sub-arrays completely isolated from each other, shading on one won't affect another at all. The flats out perform at late dusk, neighbor's tree shades 6 panels on the roof at dusk, chimney bites some roof panels in the winter at dusk and right at summer solstice, gets the patio instead at about 6:30PM.