The meters, supplied by Landis+Gyr, occasionally run fast when experiencing a narrow band of high temperatures, resulting in a miscalculation of energy bills. The error affects fewer than 1,600 of the two million meters Landis+Gyr supplied to PG&E.
The meters will be replaced at no cost to customers. The utility will issue full refunds to customers who received inaccurate bills. The average refund will be about $40 per customer. PG&E will also issue a $25 credit for customer inconvenience and offer a free in-home energy audit to affected customers.
If any additional meters malfunction, diagnostic signals will flag the meters for immediate replacement.