Oregon's net meter law, enacted in 2007, requires all investor owned utilities to offer net metering to customers that install up to a 2MW solar PV system. Net metering is the law that enables consumers to 'spin their meters backwards' by producing their own power.

Renewable energy systems that qualify are solar, wind, hydro,biomass, and fuel cells.

Net metering is the measured difference, or 'net', between the amount of power you consume and the amount of power your RE system produces. During each billing month the exchange between you and your utility is a kwh-to-kwh power exchange. If the net flow of power goes to the consumer, you pay for that power. If the net flow of power goes to the utility, they pay you for that power. Your other service costs remain the same.

For example, if your total power consumption in one month is 800kwh and your RE system produces 400kwh you pay for the net difference - 400kwh (plus your normal service costs) at the end of the month. If your total power consumption in one month is 500kwh and your RE system produces 700kwh your utility owes you for the net difference of 200kwh (you still owe your normal service costs).

Each utility can have different rates at which you are compensated if you have excess production. Check with your local utility to find out about interconnection agreements and compensation rates.

You have several options at the end of the year as well. The normal recourse is to credit the consumer any outstanding credit or money owed. You also have the option to donate your credits to low-income assistance programs. Contact your utility if you have questions.