How does net metering or net billing affect the economics of a project?
Net metering and net billing policies determine how you're compensated for excess solar energy sent back to the grid, directly impacting your project's financial returns.
Net metering is a policy that credits you at the full retail electricity rate for any excess energy your solar system sends back to the grid. When your system produces more than you consume — typically during peak sunlight hours — that surplus flows to the grid and you receive a credit on your bill. You can then use those credits when your system isn't producing enough, like at night. This one-to-one exchange makes net metering one of the most financially favorable policies for solar project economics.
Net billing is a newer policy structure gaining traction in states like California (under NEM 3.0). Unlike net metering, net billing compensates exported energy at a lower rate than what you pay for imported energy. This means the electricity you send to the grid is worth less than the electricity you pull from it.
Why it matters for project economics
Under net metering, oversizing your solar system carries less financial risk because every kilowatt-hour exported earns full retail value. Under net billing, the incentive shifts toward self-consumption — using as much of your solar production on-site as possible, which is where battery storage becomes particularly valuable.
The distinction between these two policies can significantly affect your project's payback period and overall return on investment. A system that looks highly profitable under net metering may need to be resized or paired with storage to achieve similar returns under net billing.
Before investing in a solar project, confirm whether your utility offers net metering, net billing, or a hybrid approach. Policies vary by state and utility territory, and some are actively transitioning from one to the other.
Net billing is a newer policy structure gaining traction in states like California (under NEM 3.0). Unlike net metering, net billing compensates exported energy at a lower rate than what you pay for imported energy. This means the electricity you send to the grid is worth less than the electricity you pull from it.
Why it matters for project economics
Under net metering, oversizing your solar system carries less financial risk because every kilowatt-hour exported earns full retail value. Under net billing, the incentive shifts toward self-consumption — using as much of your solar production on-site as possible, which is where battery storage becomes particularly valuable.
The distinction between these two policies can significantly affect your project's payback period and overall return on investment. A system that looks highly profitable under net metering may need to be resized or paired with storage to achieve similar returns under net billing.
Before investing in a solar project, confirm whether your utility offers net metering, net billing, or a hybrid approach. Policies vary by state and utility territory, and some are actively transitioning from one to the other.