Net metering measures the electricity your PV system produces and credits you for it on your electric bill. If you buy electricity from your utility (e.g., basic service or hourly pricing), you must contact the utility to enroll in net metering. If you buy electricity from a Retail Electric Supplier (e.g., through municipal aggregation or an individual contract), you must contact the supplier to enroll in net metering. If you later change your electricity supplier, you will need to re-enroll in net metering with your new supplier. Failure to enroll or re-enroll may significantly impact the value you receive from your PV system.