Hi all,
Have a solar roof install scheduled for install later this month and trying to understand the interconnection process with PG&E so that I can minimize any back and forth.
Reading through the PG&E net metering interconnect agreement and it states "NEM systems should be sized with an estimated annual production no larger than 110% of the Customer’s total previous 12 months of usage (annual usage) and projected future increase"
I will have a 11.2kW solar roof (estimated 15,367 kWh production in the 1st year per the tesla docs) and my trailing 12 months of electrical usage is a hair under 12,000 kWh. 15,367 kWh / 12,000 kWh = 128%, so I'd be generating an extra 18% over the 110% limit before considering that I'm charging my Model 3 at home now instead of at work and plan on getting a hot tub installed next year.
For those that that have solar connected through PG&E (and East Bay Community Energy, which my city, Fremont, is part of) did you have issues getting approval when your generation is expected to exceed 110% of usage? I plan on filling in the "I plan to increase my annual use by" field to account for the hot tub and additional home charging (which should easily cover the 18% difference over the 110% limit) but is PG&E a stickler for that field?
Also, how does PG&E determine what the annual production is? The pdf mentions "Solar CEC-AC rating" but does anyone know how I get that value? The footnotes say:
That value that gets multiplied by 1664 to arrive at the total energy production in kWh.
thanks,
-norm
Have a solar roof install scheduled for install later this month and trying to understand the interconnection process with PG&E so that I can minimize any back and forth.
Reading through the PG&E net metering interconnect agreement and it states "NEM systems should be sized with an estimated annual production no larger than 110% of the Customer’s total previous 12 months of usage (annual usage) and projected future increase"
I will have a 11.2kW solar roof (estimated 15,367 kWh production in the 1st year per the tesla docs) and my trailing 12 months of electrical usage is a hair under 12,000 kWh. 15,367 kWh / 12,000 kWh = 128%, so I'd be generating an extra 18% over the 110% limit before considering that I'm charging my Model 3 at home now instead of at work and plan on getting a hot tub installed next year.
For those that that have solar connected through PG&E (and East Bay Community Energy, which my city, Fremont, is part of) did you have issues getting approval when your generation is expected to exceed 110% of usage? I plan on filling in the "I plan to increase my annual use by" field to account for the hot tub and additional home charging (which should easily cover the 18% difference over the 110% limit) but is PG&E a stickler for that field?
Also, how does PG&E determine what the annual production is? The pdf mentions "Solar CEC-AC rating" but does anyone know how I get that value? The footnotes say:
California Energy Commission Alternating Current, refers to the inverter efficiency rating (Quantity of PV Modules x PTC Rating of PV Modules x CEC Inverter Efficiency Rating)/1000
That value that gets multiplied by 1664 to arrive at the total energy production in kWh.
thanks,
-norm