Which utility serves this customer?
Each Ohio utility has different net metering rules, rebate programs, and pitch angles. Selecting here loads the right calculator math and proposal template.
AEP Ohio
AEP Ohio · Columbus, Newark, Lancaster · central & eastern Ohio (61 counties, ~1.5M customers)
Net Energy Metering Service (NEMS) — net billing, not true 1:1 net metering: imports billed at the full bundled retail rate, exports credited at the generation-related energy charges only (the SSO Price-to-Compare, ~10.1¢/kWh as of June 2026, which floats with each SSO auction). Credits roll forward; a customer may request an annual (12-month) true-up refund capped at accumulated credit. Ohio nets all charges at the full retail rate within the billing month on a single register, so a battery does not reduce the monthly bill here (bill arbitrage ~0) — only the net monthly excess is credited at the generation rate (a better excess rate than most states). Net-metering eligibility is the 120%-of-annual-usage sizing rule (25 kW is the Level-1 interconnection threshold, not a NEM cap). Grandfathering is expressly disclaimed in the tariff. Residential customer charge $13.50/mo (Schedule RS, eff. 4/10/2026, Case 25-392-EL-AIR). NEM applies to standard-service-offer customers; shopping (CRES) customers are credited per their supplier contract. AEP proposed weakening net metering in 2025; PUCO declined on Jan 7, 2026 (Docket 25-0349-EL-ORD).
Lead with: NEMS net billing + documented 2025 NEM-reduction filing (reviewed, kept, refile risk) + winter resilience
Duke Energy Ohio
Duke Energy Ohio · Cincinnati metro & southwest Ohio (Hamilton, Butler, Clermont, Warren counties · ~750K customers)
Monthly net metering: imports at full retail, excess exports converted to a monetary credit at the SSO energy component that rolls forward indefinitely (NO cash-out — forfeited if the customer stops taking service). NEM rider = P.U.C.O. Electric No. 19, Sheet 48 (eff. 1/2/2019). Ohio nets all charges at the full retail rate within the billing month on a single register, so a battery does not reduce the monthly bill here (bill arbitrage ~0) — only the net monthly excess is credited at the generation rate. Note: Rider RE is a CHARGE (~7.7¢/kWh), not a credit. Residential customer charge $8.00/mo (Rate RS). NEM sizing is the 120%-of-usage rule (25 kW is the Level-1 interconnection threshold). NEM applies to standard-service customers; shopping (CRES) customers are credited per their supplier contract. Duke removed retail 1:1 net metering in North Carolina and the NC Court of Appeals upheld it (Sept 17, 2024) — the same-parent precedent. Duke's Ohio ESP orders a base distribution rate case filing by 6/30/2027.
Lead with: Winter resilience + Duke's NC playbook (removed NC 1:1 NEM, courts upheld it) + generation-component NEM
AES Ohio
AES Ohio · Dayton metro & western Ohio (Montgomery, Greene, Miami, Clark counties · ~527K customers)
Formerly Dayton Power & Light (DP&L). Monthly net metering: imports at full retail, excess exports credited at the SSO energy component (Sheet G10, ~10.9¢/kWh eff. 6/1/2026) as a rolling monetary credit — NO cash-out, forfeited at account closure. NEM sizing is the 120%-of-usage rule (25 kW is the Level-1 interconnection threshold). One-time $95 meter-exchange fee (~$130 average with processing). Residential customer charge $9.75/mo (eff. 1/1/2026). AES all-in is ~20.75¢/kWh at 1,000 kWh (eff. 7/1/2026) — the HIGHEST of the six Ohio utilities, and the steepest recent climb. Ohio nets all charges at the full retail rate within the billing month on a single register, so a battery does not reduce the monthly bill here (bill arbitrage ~0) — only the net monthly excess is credited at the generation rate. NEM applies to standard-service customers; shopping (CRES) customers are credited per their supplier. Current rate case 24-1009-EL-AIR (Order 11/5/2025, ~9% residential increase).
Lead with: Highest OH all-in (~20.75¢) + steepest rate climb + Dayton storm resilience (2019 tornadoes)
Ohio Edison
Ohio Edison (FirstEnergy) · Akron, Youngstown, Canton, Warren, Mansfield · northeast & central Ohio (~1M customers)
FirstEnergy company — shared net metering with The Illuminating Company and Toledo Edison: imports at full retail, each exported kWh offsets delivered energy 1:1 within the billing period, excess credited at the Rider GEN generation component (~7.3¢/kWh; OE 7.2774¢ eff. 6/1/2026) as a rolling credit, with a customer-requested annual 12-month true-up refund. Ohio nets all charges at the full retail rate within the billing month on a single register, so a battery does not reduce the monthly bill here (bill arbitrage ~0) — only the net monthly excess earns the generation rate. NEM sizing is the 120%-of-usage rule (25 kW is the Level-1 interconnection threshold). Service charge $6.50/mo; distribution energy 4.0988¢/kWh (eff. 3/1/2026). FirstEnergy Ohio 2025 supply-rate impact was ~11.8% total-bill at Ohio Edison (June 1, 2025; the higher supply-hike figure is FE's West Virginia pattern). The PUCO base rate case (24-0468-EL-AIR, Order Nov 19, 2025) adopted a consolidated ~+$34M for the three Ohio Companies combined at a 9.63% ROE (tariffs eff. 3/1/2026). NEM applies to standard-service customers; shopping (CRES) customers are credited per their supplier.
Lead with: FirstEnergy OH supply climb (~11.8% 2025) + winter resilience + generation-component NEM
The Illuminating Company
The Illuminating Company (FirstEnergy) · Greater Cleveland · Cuyahoga, Lake, Lorain, Ashtabula, Geauga counties (~750K customers)
FirstEnergy company (also known as CEI) — shared net metering with Ohio Edison and Toledo Edison: imports at full retail, each exported kWh offsets delivered energy 1:1 within the billing period, excess credited at the Rider GEN generation component (~7.3¢/kWh; CEI 7.2774¢ eff. 6/1/2026) as a rolling credit, with a customer-requested annual 12-month true-up refund. Ohio nets all charges at the full retail rate within the billing month on a single register, so a battery does not reduce the monthly bill here (bill arbitrage ~0) — only the net monthly excess earns the generation rate. NEM sizing is the 120%-of-usage rule (25 kW is the Level-1 interconnection threshold). Service charge $6.50/mo; distribution energy 4.8397¢/kWh (eff. 3/1/2026). FirstEnergy Ohio 2025 supply-rate impact was ~12.5% total-bill at CEI (June 1, 2025; the higher supply-hike figure is FE's West Virginia pattern). The PUCO base rate case (24-0468-EL-AIR, Order Nov 19, 2025) adopted a consolidated ~+$34M for the three Ohio Companies combined at 9.63% ROE (tariffs eff. 3/1/2026). NEM applies to standard-service customers; shopping (CRES) customers are credited per their supplier.
Lead with: FirstEnergy OH supply climb (~12.5% 2025) + Cleveland lake-effect winter weather
Toledo Edison
Toledo Edison (FirstEnergy) · Toledo, Sandusky, Fremont · Lucas, Wood, Ottawa, Erie counties (~310K customers)
FirstEnergy company (smallest of the three Ohio FirstEnergy utilities) — shared net metering with Ohio Edison and The Illuminating Company: imports at full retail, each exported kWh offsets delivered energy 1:1 within the billing period, excess credited at the Rider GEN generation component (TE 7.3661¢ summer / 6.9966¢ winter, eff. 6/1/2026) as a rolling credit, with a customer-requested annual 12-month true-up refund. Ohio nets all charges at the full retail rate within the billing month on a single register, so a battery does not reduce the monthly bill here (bill arbitrage ~0) — only the net monthly excess earns the generation rate. NEM sizing is the 120%-of-usage rule (25 kW is the Level-1 interconnection threshold). Service charge $6.50/mo; distribution energy 3.6046¢/kWh (eff. 3/1/2026). FirstEnergy Ohio 2025 supply-rate impact was ~13.3% total-bill at Toledo Edison (June 1, 2025; the higher supply-hike figure is FE's West Virginia pattern). The PUCO base rate case (24-0468-EL-AIR, Order Nov 19, 2025) adopted a consolidated ~+$34M for the three Ohio Companies combined at 9.63% ROE (tariffs eff. 3/1/2026). NEM applies to standard-service customers; shopping (CRES) customers are credited per their supplier.
Lead with: FirstEnergy OH supply climb (~13.3% 2025) + Toledo lake-effect winter weather