I'm building a detached ADU (Accessory Dwelling Unit) in the back yard. Main house has a 100A main electrical panel with solar panels (not Tesla) that has Enphase microinverters.
I will be installing additional Tesla solar panels and 3 Powerwalls for the ADU.
Tesla designed the system based on existing 100A panel. They they can integrate new solar panels with the existing solars panels which will charge the Powerwalls which in turn can backup both the main house and ADU.
My question...if I upgrade my main panel after solar panel/Powerwall installation from 100A to 400A will I need to call Tesla to make any adjustments to the system? Any idea how much it would cost? Will it be difficult?
Tesla site technician came out for initial assessment and he recommended waiting until I upgrade to 400A panel first and then have Tesla do the install. Talked about having to do new calculations and that it'd be a headache to come back later and redo everything.
The problem is PG&E is taking forever to come back with a proposed design for my underground powerline upgrade. It's already been 4 months with no answer. ADU will be completed next month. Don't want to wait another 6 months+. I'm not sure if city will sign off on the ADU without the required solar panel system installed.
Thoughts?
I will be installing additional Tesla solar panels and 3 Powerwalls for the ADU.
Tesla designed the system based on existing 100A panel. They they can integrate new solar panels with the existing solars panels which will charge the Powerwalls which in turn can backup both the main house and ADU.
My question...if I upgrade my main panel after solar panel/Powerwall installation from 100A to 400A will I need to call Tesla to make any adjustments to the system? Any idea how much it would cost? Will it be difficult?
Tesla site technician came out for initial assessment and he recommended waiting until I upgrade to 400A panel first and then have Tesla do the install. Talked about having to do new calculations and that it'd be a headache to come back later and redo everything.
The problem is PG&E is taking forever to come back with a proposed design for my underground powerline upgrade. It's already been 4 months with no answer. ADU will be completed next month. Don't want to wait another 6 months+. I'm not sure if city will sign off on the ADU without the required solar panel system installed.
Thoughts?