Rule 21 Non-Export
The electrical energy produced by non-exporting generating facilities is fully used by the customer. From PG&E's perspective, at all times of the day the power produced by a customer's non-exporting generator should be equivalent to or less than the avoided amount of electricity PG&E would otherwise have delivered to serve that customer.
Interconnection requirements for a non-exporting generating facility are considered simplified because there is no risk of reverse power flow to the Distribution System and of unintended “islanding.” (Islanding is a condition where part of the electric utility’s system becomes disconnected from the rest of the system, continues to operate and creates potentially unsafe conditions for PG&E personnel and equipment.)
>>To apply, go to the Rule 21-Export Online Aplication (Form: 79-974)
Net Energy Metering (NEM) and Other Retail Programs
Net Energy Metering (NEM) allows customers with an eligible power generator to offset the cost of their electric usage with energy they export to the grid. With NEM, the customer pays only for the net amount of energy used from the utility. A specially programmed “net meter” is installed to measure the difference between the electricity the customer purchases and the electricity the customer exports to the grid within given time intervals. NEM customers are allowed to "net" their total annual energy exports to the grid against their annual usage. In some cases, when customers consume less energy than what they generate, the excess energy exported to the grid over this annual period is also purchased by PG&E at our avoided cost.To qualify for net energy metering at PG&E:
- Your generator size must be less than or equal to 1 megawatt (1,000 kilowatts).
- Your generating system must be powered by an eligible renewable power source.
- You are not interconnecting to a secondary network distribution line.
- Your generating system components have been reviewed and approved by PG&E.
- You have first established an electrical account with PG&E at the interconnection site. (If another company supplies your electricity, you must contact that company about net energy metering.)
- You have completed and supplied all required documentation to PG&E.
- You have allowed PG&E to inspect your system and install the required “net meter” accessible to a PG&E meter reader.
- You have received written authorization from PG&E to operate in parallel.
Net Energy Metering in California is available for solar, wind, biomass, biogas, hydro, geothermal and other renewable energy technologies up to 1 MW. PG&E's NEM programs are: Standard NEM, Expanded NEM, RES-BCT and NEMVMASH. The methods of applying credit for exported energy vary with the program.
>> To apply for Standard NEM >30 KW, go to Form 79-1101
>> To apply for Expanded NEM 30KW – 100KW, go to Online Form: 79-974
>> To apply for NEMVMASH Multi-Family – same delivery point – go to Form 79-1109
>> To apply for NEMVMASH Multi-Family – different delivery point, go to Form 79-1124
>> To apply for RES-BCT, go to Form 79-974
Rule 21 Export or Wholesale Distribution
Technically, power exported to the electric grid for sale—regardless of the buyer—has the same requirements as Net Energy Metered export, but it differs significantly on a contractual and jurisdictional basis. Power exported from a generator connected to the Distribution System may be sold under Rule 21 in only one way, and that is to PG&E under a PURPA Power Purchase Agreement. Any other type of resale is considered a wholesale transaction, and the customer must apply under the FERC wholesale tariff and sign a Wholesale Distribution Tariff (WDT) agreement with PG&E.
>> To apply for Rule 21 Export, go to Online Form 79-1145
>> To apply for Wholesale Distribution, go to the Online Form