Basics of net metering policies
Net metering is a billing arrangement that credits solar system owners for electricity they export to the grid. When the system produces more than the home uses, excess energy flows to the grid and earns credits on the homeowner’s utility bill.
How net metering generally operates:
- Metering: A bi-directional meter records energy imported from and exported to the grid.
- Credits: Exported kilowatt-hours (kWh) offset future consumption, often at near retail rates under traditional net metering programs.
- Billing cycle: At the end of a billing period, net usage is the difference between consumed and exported energy; credits can roll over in many programs.
Policy variations and considerations
- Compensation rates: Some utilities credit exports at full retail rate, while others use reduced or time-varying rates.
- Caps and limits: Some regions limit system size eligible for net metering or the total program capacity.
- Time-of-use rates and value-of-solar: Advanced rate structures may value exported energy differently by time of day.
Practical implications
- Net metering improves economics by reducing net electricity bills and shortening payback periods.
- Always check local utility rules and state policies since net metering details vary widely and have major financial impacts.
Understanding your local net metering rules helps size the system appropriately and estimate financial benefits accurately.