Battery Storage for Ohio Businesses: Uses and Economics
The short answer
A behind-the-meter battery earns money in Ohio mainly by lowering two costs: monthly demand charges and the capacity tag set during PJM's summer peak hours, which costs about $120 per kW a year at the 2026/27 capacity price. PJM's last three capacity auctions all cleared at the price cap, so that value is known through May 2029. Backup power and solar pairing add value; buying cheap and using expensive (arbitrage) rarely justifies a battery on its own when you're on standard fixed-price supply. The federal storage investment credit continues at full value for projects beginning construction through 2033, subject to sourcing rules, while Ohio utilities offer no storage rebates.
This page covers whether storage fits and what it's worth. For running a battery once it's installed — dispatch, safety, warranties — see operating battery storage. For the charges a battery targets, see lowering peak demand charges and capacity tags explained; for equipment costs under current tariffs, see solar and storage equipment costs.
Four use cases
| Use case | How it earns | What must be true | Watch-outs |
|---|---|---|---|
| Demand-charge shaving | Discharges during your monthly peak intervals so the meter sees less kW | Demand-billed rate schedule; short, sharp peaks | Battery must still have charge when the peak arrives; long peaks need more kWh |
| Capacity-tag reduction | Discharges during PJM's summer peak hours, lowering next year's tag | Contract passes capacity through, or re-prices when your tag changes; reliable peak-day forecasts | Missing one peak hour can erase much of the saving |
| Backup power | Keeps critical loads running during an outage | Islanding-capable inverter and switchgear; a reserved state of charge | Reserve reduces capacity for daily savings; duration is limited |
| Solar pairing | Stores midday solar for use later in the day | On-site solar; limited export value | Net-metering credits are at the energy component of the default price, so stored self-use is often worth more than export |
A fifth stream, price arbitrage, only matters if you're on time-of-use or hourly index pricing; on a fixed all-in price there's no spread to capture. PJM demand response can add revenue through a curtailment service provider — see demand response programs.
Which sites are good candidates
Stronger fit:
- Peaks that are high but short — a low load factor — such as morning start-ups, batch processes, or EV and forklift charging.
- A meaningful demand charge on your rate schedule.
- A capacity tag that is high relative to your average load, on a contract that passes capacity through.
- Critical loads where outages are costly.
- Solar already installed or planned.
Weaker fit:
- Flat 24/7 loads with few spikes.
- Peaks that last several hours, which require a much larger (and costlier) battery.
- Small accounts on the utility's default service, where capacity is built into the per-kWh price and lowering your individual tag changes little.
Start with 12 months of 15-minute interval data. The shape of your peaks decides the battery's power (kW) and duration (kWh).
Illustrative economics
Assumptions, not quotes: a 250 kW / 500 kWh battery at a site on a demand-billed schedule with a demand charge of $10 per kW-month, on a supply contract that passes capacity costs through.
Demand charges. The battery reliably shaves 150 kW off the monthly peak in 10 of 12 months (it misses two months with unusually long peaks): 150 kW × $10 × 10 months = $15,000 a year
Capacity tag. The battery discharges 200 kW during every PJM peak hour in summer 2027, lowering the tag for June 2028–May 2029 at $325.00/MW-day (about $118.63 per kW-year): 200 kW × $118.63 = $23,726 a year
Total: about $38,700 a year before operating and maintenance costs and battery degradation.
If the installed cost after tax benefits were an assumed $300,000, simple payback would be about $300,000 ÷ $38,726 ≈ 7.7 years. Get real quotes, model your own interval data, and treat capacity savings as at risk if a peak hour is missed.
Federal and state incentives in 2026
- Federal storage investment credit. Under P.L. 119-21, full value continues for projects beginning construction through 2033, then steps down to 75% in 2034, 50% in 2035 and zero in 2036.
- Foreign-entity-of-concern rules. Projects beginning construction after December 31, 2025, face sourcing restrictions that can disqualify the credit. Battery supply chains make this a real diligence item — ask the vendor to document compliance.
- Solar pairing. If the battery is part of a solar project, the solar credit has its own, tighter deadlines: construction started by July 4, 2026, or placed in service by December 31, 2027.
- Depreciation. 100% first-year bonus depreciation is available for eligible property acquired after January 19, 2025.
- No utility rebates. Ohio's investor-owned utilities don't offer business storage incentives.
- Financing. C-PACE for property owners in participating communities, equipment financing, or third-party ownership.
Confirm eligibility for any federal credit or depreciation with a tax adviser.
Backup power: what a battery can and can't do
A battery sized for demand shaving typically covers critical loads for hours, not days. To provide backup at all, it needs an inverter and switchgear that can island your building safely from the grid, and you need to reserve part of its charge — which reduces what's available for daily savings. For long outages, a generator or a battery-generator hybrid is usually more practical. See backup power mistakes.
Questions to ask before buying
- Has the vendor modeled savings from your interval data, month by month, including months the battery misses?
- How will the system forecast PJM peak days, and what is its track record?
- Does your supply contract pass capacity costs through, or will it re-price when your tag drops?
- What do the warranty's cycle and throughput limits allow, and how does the dispatch plan stay within them?
- Has the design been reviewed against fire codes such as NFPA 855 and product listings such as UL 9540, and has your utility approved interconnection?
- How will the sourcing rules be documented for the tax credit?
FAQ
Does battery storage pay off for Ohio businesses?
It can, at sites with short, sharp peaks, meaningful demand charges and a capacity cost they can actually reduce. At about $120 per kW-year, capacity-tag savings are a much larger part of the case than they were before 2025.
How does a battery reduce my capacity tag?
By discharging during PJM's summer peak hours, which set your tag for the year starting the following June 1. It works only if the battery runs in every peak hour that counts.
Is there still a federal tax credit for commercial batteries?
Yes. The storage investment credit remains at full value for projects beginning construction through 2033, then phases down, subject to foreign-entity-of-concern sourcing rules. Confirm with a tax adviser.
Can a battery replace a backup generator?
For short outages and critical loads, sometimes. For multi-day outages, a generator or hybrid system is usually needed.
Sources
- PJM capacity market (RPM): https://www.pjm.com/markets-and-operations/rpm
- P.L. 119-21 (H.R. 1, 119th Congress): https://www.congress.gov/bill/119th-congress/house-bill/1
- Ohio Adm. Code 4901:1-10-28 (net metering): https://codes.ohio.gov/ohio-administrative-code/rule-4901:1-10-28