Commercial battery storage in Pennsylvania, where the transmission line is the prize.
Pennsylvania has almost no state storage incentive, but it sits inside PJM, where capacity prices have cleared at the cap two years running and large accounts pay transmission on their own peak. PPL rebased its tariff in July 2026 and demand charges rose roughly a third. For the right account the biggest controllable line on the bill is not the distribution demand charge at all; it is the transmission charge a battery can flatten.
Utilities KEEL prices in Pennsylvania
KEEL's Pennsylvania tariff work to date is in PPL Electric territory. The other distribution companies (PECO, Duquesne, FirstEnergy's Met-Ed, Penelec, Penn Power and West Penn) are screened from the bill on request.
| Utility | Rate classes | Demand charge as read | What it means for a battery |
|---|---|---|---|
| PPL Electric | GS-3 (general service) | $5.156 per kW distribution, effective July 1, 2026 (up 29%) | Transmission is billed per kWh on GS-3, so the battery earns on the distribution demand charge and demand response only. |
| PPL Electric | LP-4 (large power) | $3.452 per kW distribution plus $21.647 per kW-month transmission on the account's own monthly peak | The transmission charge is larger than the distribution charge itself. A battery that clips the monthly 15-minute peak cuts both. |
| PPL Electric | LP-5 (large power, transmission) | No distribution demand charge; transmission billed on the PJM peak-load contribution at $18.663 per kW-month | Value comes from being discharged during the five PJM-zone peak hours each year. Three of the last five fell on January mornings, so a summer-only dispatch misses most of it. |
Rates as read from the filed tariffs in August 2026. Utilities re-file often; KEEL re-reads the effective sheet on the day a project is priced.
What a battery earns in Pennsylvania
Distribution demand charges, up a third
PPL's July 2026 rebase lifted GS-3 to $5.156 per kW and LP-4 to $3.452 per kW. PPL's increase is one data point; delivery rates move both ways across PJM, which is why KEEL re-reads the sheet at pricing.
Transmission on your own peak
LP-4 accounts pay $21.647 per kW-month on their monthly peak. That is the single largest controllable line on the bill and the one most proposals miss.
PJM capacity and transmission tags
Capacity has cleared at the cap (about $333 per MW-day for 2027/28). Accounts on competitive supply with pass-through can cut both capacity and transmission tags by discharging in the handful of peak hours that set them.
State and utility programs
Pennsylvania has one small state instrument for commercial storage and otherwise relies on the federal credit and PJM.
| Program | What it pays | Who can claim it | Notes |
|---|---|---|---|
| Federal investment tax credit (§48E) | 30%+ of eligible cost: a 30% base (prevailing-wage rules apply at 1 MW and above) plus a 10-point adder for domestic content | The owner of the equipment; nonprofits and public bodies by direct pay | See the federal guide. |
| Act 129 Phase V C&I Peak Load Shift Pilot (PPL) | Up to $100 per kW, capped at $100,000 per project | C&I customers; the rebate is assignable to a third party | $1 million statewide budget with two or three projects expected. Worth applying for, never worth underwriting. |
| PJM capacity and transmission tag management | Avoided capacity and network-transmission charges on the account's tags, sized per account from the cleared auction price and the filed transmission rate | Accounts on default service billed on their own tag, or on competitive supply with pass-through | On a fixed all-in supply contract the supplier keeps the saving. KEEL checks the supply contract before booking a dollar of it. Capacity-tag avoidance and PJM demand-response payments cannot both be taken on the same kW. |
| State storage rebate | None found | — | Beyond the Act 129 pilot, KEEL found no open state rebate or PEDA solicitation for behind-the-meter storage as of August 2026. |
Read from program documents and filed tariffs in August 2026. Programs open, fill and change; KEEL confirms each line against the live source before it goes in a proposal. The federal credit applies in every state on top of what is listed here, subject to the conditions in that guide.
What to watch in Pennsylvania
- PPL's LP-5 transmission rate moved from $28 to $56 to $18.66 per kW-month within six months. KEEL does not book a ten-year line off one snapshot; it models a range.
- Peak-load contributions are set a year in arrears, so a battery installed this year produces tag savings starting next year. The lease is priced with that lag.
- Batteries are exempt from PPL standby charges under Rule 6.A(5), and PPL's Rule 12 interconnection explicitly covers third-party-owned storage. Good facts for a lease.
- Pennsylvania's corporate net income tax is 7.49% for 2026 and steps down annually to 4.99% by 2031.
How KEEL prices a Pennsylvania project: read the rate class first. On GS-3 it models the distribution demand charge; on LP-4 it models the account's own monthly peak against both the distribution and the transmission charge; on LP-5 it back-tests dispatch against the actual PJM-zone peak hours, winter included. Tag savings are included only after the supply contract shows the customer is billed on its own tag. The Act 129 pilot is listed as upside, never as a line the payment depends on.
What to send
Twelve months of electric bills for the meter you have in mind (interval data if you have it), the service address and the rate class printed on the bill. That is enough for a first read on demand charges, program eligibility and a monthly payment range. See Lease vs. Buy for how the numbers land under each structure, or schedule a property review.
Common questions
Is there a Pennsylvania incentive for commercial battery storage?
Only a small Act 129 pilot at PPL, worth up to $100 per kW and capped at $100,000 per project from a $1 million statewide budget. KEEL found no general state rebate or open PEDA solicitation as of August 2026. Pennsylvania projects are priced on the federal credit, the tariff and PJM.
What is a PJM tag and why does it matter?
Each large account carries two tags set by its load in a few peak hours of the prior year: a capacity tag (five PJM system peaks) and a transmission tag set by the zone's own peak hours (on PPL, five zonal peaks across a November–October year, several of them winter mornings). Capacity and network transmission charges for the following year are billed on those tags. A battery that is discharging in those hours lowers next year's tags and the charges that ride on them. The saving only reaches you if your supply contract passes those charges through.
Which Pennsylvania accounts pencil best?
PPL LP-4 accounts with a peaky load, because the transmission charge on their own peak is the largest controllable line on the bill, and larger accounts on competitive supply where the PJM tags are passed through.
Have a Pennsylvania building in mind?
Send the address and a bill. KEEL returns the demand-charge read, the program lines the site qualifies for and a monthly payment range, with the source for each.