Net Metering in Ohio: How It Works and What to Expect

Net metering is the billing mechanism that determines how Ohio residential and commercial solar owners receive credit for electricity sent to the grid when their systems produce more power than on-site loads consume. The Public Utilities Commission of Ohio (PUCO) establishes and enforces the rules governing this arrangement, making it a foundational element of any solar financial analysis in the state. This page covers Ohio's net metering structure, the mechanics of credit calculation, regulatory boundaries, persistent misconceptions, and a structured reference table comparing key program parameters.

• Definition and Scope
• Core Mechanics or Structure
• Causal Relationships or Drivers
• Classification Boundaries
• Tradeoffs and Tensions
• Common Misconceptions
• Checklist or Steps
• Reference Table or Matrix
• References

Definition and Scope

Net metering in Ohio is defined under Ohio Revised Code § 4928.67 as a billing arrangement in which a retail electric customer who operates an eligible electricity-generating facility receives a credit for electricity delivered to the distribution system. The statute covers systems that use solar, wind, biomass, landfill gas, or hydropower as the generating source, though photovoltaic solar accounts for the dominant share of installed systems operating under net metering agreements in Ohio.

The eligibility cap for individual systems under Ohio's statutory framework is set at 120% of the customer's average annual electricity consumption (Ohio Revised Code § 4928.67). Systems sized above that threshold do not qualify for net metering credits on excess capacity.

Scope and Coverage Limitations

This page covers net metering as administered under Ohio state law and PUCO jurisdiction. Federal-level policy—such as FERC interconnection standards—applies in parallel but is not within PUCO's authority. Municipal electric utilities operating under their own charters, including those in Columbus and Cleveland that have their own distribution infrastructure, are not required by state statute to offer net metering identical to investor-owned utility programs. Cooperative utilities may have distinct program terms. Rules applicable to neighboring states—Pennsylvania, Michigan, Indiana, Kentucky, or West Virginia—are outside this scope entirely. For a broader understanding of how Ohio's regulatory environment shapes solar adoption, see the regulatory context for Ohio solar energy systems.

Core Mechanics or Structure

Under net metering, a bidirectional meter measures both electricity drawn from the grid and electricity exported to the grid. The utility calculates the difference on each billing cycle—typically monthly. When generation exceeds consumption during the billing period, the surplus kilowatt-hours are credited to the customer's account at the retail rate charged by that utility.

Ohio's investor-owned utilities—American Electric Power Ohio (AEP Ohio), FirstEnergy subsidiaries (Ohio Edison, Cleveland Electric Illuminating Company, Toledo Edison), and Duke Energy Ohio—each file their net metering tariffs with PUCO. The tariff specifies the exact credit rate, any applicable fees, and interconnection requirements. In Ohio, the statute requires that credits be valued at the full retail rate, not a reduced wholesale or avoided-cost rate, which distinguishes Ohio's program from lower-value structures found in other states.

Excess credits that accumulate beyond a monthly bill do not convert to cash payments from investor-owned utilities under the standard program. Instead, they roll forward as kilowatt-hour credits to subsequent months. Annual true-up provisions vary by utility tariff: some Ohio utilities reset accumulated credits to zero at the end of a 12-month period, forfeiting any remaining balance; others permit indefinite rollover. Customers should request and read the specific net metering tariff on file with PUCO before installation.

The physical infrastructure requirement is a UL-listed bidirectional meter or a second meter. Under PUCO's interconnection rules, inverters must meet IEEE 1547-2018 standards for grid interconnection, which govern voltage, frequency, and anti-islanding protection. Anti-islanding is the automatic shutdown of a solar inverter when the grid loses power, a critical safety function that prevents energized lines from presenting hazards to utility workers. For a technical foundation, the conceptual overview of Ohio solar energy systems provides relevant context on system architecture.

Causal Relationships or Drivers

Ohio's net metering structure reflects several intersecting policy drivers:

Legislative mandate. Ohio Revised Code § 4928.67 was enacted to remove utility discretion over whether to offer net metering, standardizing access for eligible customers across investor-owned utility territories.

Retail-rate credit value. The decision to credit surplus electricity at the full retail rate—rather than the wholesale rate—significantly changes financial return timelines. Ohio retail electricity prices have averaged between 11 and 14 cents per kilowatt-hour for residential customers across recent years (U.S. Energy Information Administration, Ohio State Profile). When credits are issued at retail rather than wholesale (which can be 3–5 cents per kilowatt-hour), the payback arithmetic changes substantially for systems with moderate export volumes.

System sizing incentive. Because the 120% cap links eligible capacity to historical consumption, the rule creates an economic incentive to size systems close to but not above that threshold. Oversized systems lose the credit mechanism for output above what the cap permits, reducing effective return on investment.

Grid infrastructure costs. Utility arguments for net metering reform center on cost-shifting: customers with solar use the grid as a backup resource but receive retail-rate credits that embed distribution infrastructure costs. This tension has driven PUCO proceedings in which utilities have proposed alternative compensation structures. For a detailed account of how utility policy intersects with solar economics, see Ohio electric utility rate structures and solar.

Classification Boundaries

Ohio net metering programs can be classified along three axes:

By utility type:
- Investor-owned utilities (IOUs): Subject to PUCO net metering rules under ORC § 4928.67. AEP Ohio, Ohio Edison, CEI, Toledo Edison, and Duke Energy Ohio fall in this category.
- Municipal electric utilities: Not subject to ORC § 4928.67. May offer net metering voluntarily. Terms vary by municipality.
- Rural electric cooperatives: Similarly exempt from the statute. AES Ohio (formerly Dayton Power and Light, a cooperative-adjacent utility) operates under a hybrid structure.

By system capacity:
- Systems up to 120% of average annual consumption: fully eligible for statutory net metering credits.
- Systems above 120% of average annual consumption: excess capacity is outside statutory net metering protection; utilities may negotiate separate power purchase agreements.

By technology:
- Solar PV with no storage: qualifies under standard net metering.
- Solar PV paired with battery storage: qualifies if the battery does not export stored utility-supplied electricity to the grid—only generation from the solar system may be credited.
- Standalone battery storage without co-located generation: does not qualify.

Tradeoffs and Tensions

Net metering at the retail rate has been contested by Ohio utilities in PUCO proceedings. The core tension is between two legitimate interests: distributed solar customers who invested based on assumed credit values, and non-solar ratepayers who may cross-subsidize solar customers' use of shared grid infrastructure.

PUCO has the authority under Ohio Revised Code § 4928 to modify net metering compensation structures through tariff proceedings. Changes enacted after a system's installation may or may not be grandfathered, depending on PUCO's order language. Ohio does not have a statutory grandfathering provision that locks in net metering terms for a defined period following interconnection, which creates regulatory uncertainty for long-payback-period investments.

A second tension involves time-of-use (TOU) rate structures. As utilities shift customers to TOU pricing—where electricity costs more during peak hours—net metering credits earned during off-peak midday solar production hours may be worth less than electricity drawn from the grid during evening peak hours. This mismatch can erode the financial assumptions of systems sized under flat-rate billing assumptions.

Community solar in Ohio presents an adjacent model that bypasses some of these tensions by allowing subscribers to receive virtual bill credits without on-site generation, but community solar in Ohio operates under a separate, less-developed regulatory framework compared to individual net metering.

Common Misconceptions

Misconception 1: Net metering means the utility pays cash for excess solar output.
Ohio's investor-owned utility tariffs credit excess generation as kilowatt-hour account credits, not cash payments. Surplus credits offset future bills but are not redeemable for cash at year-end.

Misconception 2: All Ohio utilities offer identical net metering terms.
Only investor-owned utilities are subject to ORC § 4928.67. Municipal and cooperative utilities are not bound by the same statute and may offer different rates, system size limits, or no net metering at all.

Misconception 3: A solar system eliminates the electric bill entirely.
Monthly fixed charges—customer charges, distribution access fees—appear on utility bills regardless of net energy consumption. A 100% offset of energy charges still leaves fixed monthly costs, which range from approximately $7 to $20 per month depending on the utility and rate class.

Misconception 4: Oversizing a system earns more credits.
Systems above 120% of average annual consumption lose statutory net metering eligibility for the excess capacity. Credit value for above-limit output, if any, is determined by negotiated agreement rather than statute.

Misconception 5: Battery storage always qualifies for net metering credits.
Batteries charged from the grid that later export electricity do not qualify. Only solar-generated electricity may be credited under net metering. Mixed systems require metering configurations that distinguish solar generation from stored grid energy.

For related cost and credit considerations, the pages on Ohio solar incentives and tax credits and Ohio solar renewable energy credits address parallel financial mechanisms.

Checklist or Steps

The following sequence describes the stages involved in establishing net metering interconnection in Ohio. This is a structural description of the process—not professional or legal advice.

1. Confirm utility territory. Identify whether the property is served by an investor-owned utility subject to ORC § 4928.67 or a municipal/cooperative utility with separate rules.

2. Review the applicable net metering tariff. Request the current PUCO-filed net metering tariff from the utility or locate it on PUCO's tariff portal. Note credit rate structure, annual true-up date, and any fixed fees.

3. Size the system against the 120% cap. Calculate 120% of the property's average annual consumption using 12 months of utility billing data. System capacity (in kilowatt-hours of expected annual output) should not exceed this figure for full statutory eligibility.

4. Submit an interconnection application. File the utility's interconnection application, which includes inverter specifications, a single-line electrical diagram, and system description. PUCO interconnection rules establish timelines for utility review.

5. Complete local permitting. Obtain the applicable building and electrical permits from the local authority having jurisdiction (AHJ). Ohio's permitting process for solar PV is addressed in detail at permitting and inspection concepts for Ohio solar energy systems.

6. Pass inspections. The AHJ inspects the installation to verify compliance with the National Electrical Code (NEC), currently adopted from NFPA 70 2023 edition, and any local amendments. The utility conducts its own inspection prior to authorizing interconnection.

7. Install the bidirectional meter. The utility installs or reprograms the meter to measure both import and export. Customers do not procure or install the meter themselves.

8. Receive permission to operate (PTO). The utility issues PTO after passing inspection. The system cannot legally export to the grid before PTO is issued.

9. Monitor billing. Verify that monthly bills reflect net metering credits. The Ohio solar installation process page provides further context on post-installation verification steps.

Reference Table or Matrix

Ohio Net Metering: Key Parameter Comparison by Utility Type

Tariff terms are subject to change through PUCO proceedings. The figures above reflect statutory structure; individual tariff details should be confirmed directly from PUCO's tariff portal or the utility's current filed rates.

For broader context on Ohio's solar landscape, the Ohio Solar Authority home page provides an entry point to the full site structure.

References

• Ohio Revised Code § 4928.67 — Net Metering
• Ohio Revised Code Chapter 4928 — Competitive Retail Electric Service
• Public Utilities Commission of Ohio (PUCO) — Electricity Resources
• PUCO Interconnection Standards for Distributed Generation
• U.S. Energy Information Administration — Ohio State Energy Profile
• IEEE 1547-2018 — Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces
• National Electrical Code (NFPA 70), 2023 Edition — National Fire Protection Association
• Database of State Incentives for Renewables & Efficiency (DSIRE) — Ohio