Riverside client discovered SCE has been overcharging them for 6 years due to wrong rate schedule. SCE only wants to refund 2 years but they backbill for 4 years on undercharges. Fair?
California Edison backbill vs refund asymmetry
California utilities love this double standard. CPUC Rule 10 should apply equally both ways. File a complaint if they won't match the refund period to their backbill policy.
Had exact same issue with SDG&E in San Diego. They eventually agreed to 4-year refund to match their backbill policy after formal complaint. Got client additional $45,000.
The asymmetry argument works well with California PUC. Utilities can't have different standards for backbills vs refunds when both involve their billing errors. Document their published backbill policies and demand equal treatment.