Declares that "meter aggregation" means the administrative combination of readings from and billing for all meters, regardless of the rate class, on premises owned or leased by a customer-generator located within the service territory of a single electric utility.

Provides that, if a production meter and software is required by the electric utility to provide meter aggregation under RCW 80.60.030(4), the customer-generator is responsible for the purchase of the production meter and software.

Provides that, if a customer-generator requests, an electric utility shall provide meter aggregation.

Provides that: (1) For customer-generators participating in meter aggregation, kilowatt-hours credits earned by a net metering system during the billing period first shall be used to offset electricity supplied by the electric utility.

(2) Not more than a total of one hundred kilowatts shall be aggregated among all customer-generators participating in a generating facility under this act.

(3) Excess kilowatt-hours credits earned by the net metering system, during the same billing period, shall be credited equally by the electric utility to remaining meters located on all premises of a customer-generator at the designated rate of each meter.

(4) Meters so aggregated shall not change rate classes due to meter aggregation under this act.