Utility rate history across four solar markets
Explore five completed years of utility-reported residential charges, then compare available 2026 default-supply snapshots. Every line identifies whether it represents bundled, delivery-only, or energy-only service.
Do not add the charted series together. Bundled service can include supply and delivery. Delivery-only and energy-only series are separate utility-reported service types. A 2026 supply snapshot is not an all-in bill rate.
Before quoting solar savings
- Confirm the utility and residential rate class on the actual bill.
- Use 12 months of usage, not one high or low month.
- Verify current interconnection and export-credit rules.
- Show supply, delivery and fixed charges separately.
Sources and method
The annual values equal residential revenue divided by residential sales for each utility and reported service type. Revenue is reported in thousands of dollars and sales in megawatthours, producing cents per kilowatt-hour. EIA says its average price is a weighted average of revenue and sales and may differ from a tariff rate paid by an individual customer.
- EIA-861 annual detailed files, 2021–2025
- EIA definition of average residential price
- Massachusetts DPU Basic Service data
- Maine PUC Standard Offer rates
- Pennsylvania Power Switch and Price to Compare
- New Hampshire Public Utilities Commission
Coverage: all EIA reporting entities in the four states with residential customers and utility ownership classifications other than retail power marketer or behind-the-meter provider. Municipal utilities and cooperatives are included. 2026 annual EIA values are shown as unavailable because the year is incomplete. Published 2026 supply snapshots appear only where a reviewed source supports the exact value and period.