Working on a 7,000 sqft new construction build, solar is an afterthought, solar crew just wants 10/2 Romex stubbed to multiple points on the roof and landed in nearest subpanels.
Service entrance is a 600a 120/240 MSB, runs through an ats then to a distribution panel with a 400a feed to the residence and various distribution to refeed existing utility buildings.
There will be a 400a main breaker panelboard at the residence, feeding a 200a and a 125a subpanel in the house, 200a main breaker subpanel at the detached garage. They are proposing 80a solar backfired at the detached garage, and 80a solar backfeed at the main residence.
Not looking to derate any of the main breakers in this setup, load clac is already pushing 590a for the service.
All the service equipment is purchased and onsite. I'm guessing the 600a distribution panel at the service would also be undersized with 160a of solar backfeed. 120% of 600 is 720, solar backfeed + main would come out to be 760a. Also concerned with the solar interconnections being downstream of the 100kva standby generator.
I'm thinking a supply side tap ahead of the ATS would be the only practical solution. Running into pushback because of having to run additional conduits ~500ft back to the service for it. Still waiting to hear back from the electrical engineer.
Service entrance is a 600a 120/240 MSB, runs through an ats then to a distribution panel with a 400a feed to the residence and various distribution to refeed existing utility buildings.
There will be a 400a main breaker panelboard at the residence, feeding a 200a and a 125a subpanel in the house, 200a main breaker subpanel at the detached garage. They are proposing 80a solar backfired at the detached garage, and 80a solar backfeed at the main residence.
Not looking to derate any of the main breakers in this setup, load clac is already pushing 590a for the service.
All the service equipment is purchased and onsite. I'm guessing the 600a distribution panel at the service would also be undersized with 160a of solar backfeed. 120% of 600 is 720, solar backfeed + main would come out to be 760a. Also concerned with the solar interconnections being downstream of the 100kva standby generator.
I'm thinking a supply side tap ahead of the ATS would be the only practical solution. Running into pushback because of having to run additional conduits ~500ft back to the service for it. Still waiting to hear back from the electrical engineer.