Net Metering Guide: How to Sell Solar Power Back to the Grid
Maximize your solar earnings by understanding net metering policies
Net metering is one of the most valuable policies for solar homeowners. It allows you to send excess solar electricity to the grid and receive credits on your utility bill. When your panels produce more than you use (typically midday), the surplus flows to the grid. When you need more than your panels produce (evenings, cloudy days), you draw from the grid and use your credits. This guide explains how net metering works, how to maximize your credits, and what to do if your utility doesn't offer it.
How Net Metering Works
With net metering, your utility installs a bidirectional meter that tracks both electricity you consume from the grid and electricity you export to it. At the end of each billing period, you're billed for the 'net' difference. If you exported 500 kWh and consumed 700 kWh, you pay for 200 kWh. If you exported more than you consumed, you receive a credit (usually at the retail rate) that rolls over to future bills. Most states require utilities to offer net metering, though policies vary significantly.
Net Metering vs. Net Billing
Traditional net metering credits excess solar at the full retail rate (e.g., $0.15/kWh). Some utilities have switched to 'net billing' or 'avoided cost' compensation, which pays a lower rate for exported power (e.g., $0.05/kWh wholesale rate). This significantly reduces solar ROI. Before installing solar, research your utility's specific policy. States like California have moved to NEM 3.0, which pays lower export rates but allows battery storage to maximize self-consumption.
Maximizing Your Net Metering Credits
To maximize net metering value: (1) Size your system to match your annual consumption — avoid significant overproduction if export rates are low. (2) Shift energy use to daytime hours — run dishwashers, washing machines, and EV chargers during peak solar production. (3) Consider battery storage — store excess solar for evening use instead of exporting at low rates. (4) Monitor your production and consumption — use your inverter's monitoring app to optimize usage patterns. (5) Understand your utility's annual true-up — some utilities zero out credits annually, so plan accordingly.
States with the Best Net Metering Policies
Net metering policies vary by state. States with strong net metering: Massachusetts (full retail rate, no cap), New Jersey (full retail rate), Minnesota (full retail rate). States with modified policies: California (NEM 3.0, lower export rates), Nevada (reduced rates). States with limited or no net metering: Alabama, Tennessee, South Carolina. If your state has poor net metering, battery storage becomes more important to maximize self-consumption and reduce grid dependence.
What If Your Utility Doesn't Offer Net Metering?
If net metering isn't available, you have options: (1) Battery storage — store excess solar for use at night, eliminating the need to export. (2) Load shifting — use high-consumption appliances during solar production hours. (3) Virtual net metering — some utilities offer community solar programs where you can subscribe to a shared solar array and receive bill credits. (4) Sell RECs (Renewable Energy Certificates) — in some states, you can sell the environmental attributes of your solar production separately from the electricity.
FAQ
Do net metering credits expire?
It depends on your utility. Most utilities roll over monthly credits indefinitely, but some have annual 'true-up' periods where unused credits are zeroed out or paid at a lower rate. Check your utility's specific policy. If credits expire annually, size your system to avoid significant overproduction.
Can I get net metering with a battery system?
Yes, and it's increasingly common. With a battery + solar system, you can store excess solar during the day and use it at night, reducing both your grid consumption and your exports. In areas with low export rates (like California's NEM 3.0), batteries are essential to maximize solar value.
How does net metering affect my electricity bill?
Net metering can dramatically reduce or even eliminate your electricity bill. Many solar homeowners achieve 'net zero' — their annual solar production equals their annual consumption. However, you'll still pay fixed monthly charges (customer charges, meter fees) regardless of your net energy usage. These fixed charges typically range from $5-$20/month.