HRS §269-108
What happens to extra electricity you produce each month
If you generate more electricity than you use in a month, the utility keeps the extra kilowatt-hours but gives you a credit that can lower future bills within the same 12-month period. The utility checks your total production and use each year. You are not paid for extra electricity unless you have a separate purchase agreement.
The statute, as written — Net electricity producers; excess electricity credits and credit carry over
At the end of each monthly billing period, where the electricity generated by the eligible customer-generator during the month exceeds the electricity supplied by the electric utility during that same period, the eligible customer-generator is a net electricity producer and the electric utility shall retain any excess kilowatt-hours generated during the prior monthly billing period; provided that the excess electricity generated by the customer-generator, if any, in each monthly billing period shall be carried over to the next month as a monetary value to the credit of the eligible customer-generator, which credit may accumulate and be used to offset the compensation owed the electric utility for the eligible customer-generator's net kilowatt-hour consumption for succeeding months within each twelve-month period; provided further that the electric utility shall reconcile the eligible customer-generator's electricity production and consumption for each twelve-month period as set forth in section 269-106. The eligible customer-generator shall not be owed any compensation for excess kilowatt-hours unless the electric utility enters into a purchase agreement with the eligible customer-generator for those excess kilowatt-hours.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.