Kg808
Member
- Location
- California
Hey everyone. I am bidding on a solar project and have a situation I haven't ran across before.
Pretty simple scenario: 18 KW system. 400 Amp main panel.
Option A: Ground mount all of the panels and just back feed straight to the main. Problem is there is limited 'unshaded' ground space available.
So my Option B: There are 3 dwellings on the same property all fed from the same meter/main (400A). Is there any reason I cannot install a roof mounted system w/ inverter on each dwelling?
Dwelling A: 100/100A end-fed sub panel - proposed 20A backfeed
Dwelling B: 100/100A End-fed Sub panel - proposed 20A backfeed
Dwelling C: 200/200A End-fed sub panel - Proposed 40A backfeed.
Total backfeed: 80A. which is totally doable for the 120% rule on the 400A main.
I have tied my backfeed OCPD into many sub panels before. But never ran into this situation to use multiple roof spaces and sub panels to backfeed one main/meter. Again just to be clear this is one meter feeding the entire property. Not an aggregated situation. And if it matters, I am in PG&E territory.
I'm hoping someone has ran into this before. I can't find anything that disallows this.
Thanks for your help and the free education.
Pretty simple scenario: 18 KW system. 400 Amp main panel.
Option A: Ground mount all of the panels and just back feed straight to the main. Problem is there is limited 'unshaded' ground space available.
So my Option B: There are 3 dwellings on the same property all fed from the same meter/main (400A). Is there any reason I cannot install a roof mounted system w/ inverter on each dwelling?
Dwelling A: 100/100A end-fed sub panel - proposed 20A backfeed
Dwelling B: 100/100A End-fed Sub panel - proposed 20A backfeed
Dwelling C: 200/200A End-fed sub panel - Proposed 40A backfeed.
Total backfeed: 80A. which is totally doable for the 120% rule on the 400A main.
I have tied my backfeed OCPD into many sub panels before. But never ran into this situation to use multiple roof spaces and sub panels to backfeed one main/meter. Again just to be clear this is one meter feeding the entire property. Not an aggregated situation. And if it matters, I am in PG&E territory.
I'm hoping someone has ran into this before. I can't find anything that disallows this.
Thanks for your help and the free education.