Commercial battery storage in Washington, DC, where the demand charge does the work.
Pepco's low-voltage general-service demand charge is $28.15 per kW on the monthly maximum, one of the highest in PJM, and the District's transmission tag is worth about $60 per kW-year to an account that can capture it. There is no District storage rebate, and a standalone battery earns no solar renewable energy credits, so the DC case is a demand-charge case. For a building with a sharp peak, that is enough.
Utilities KEEL prices in Washington, DC
Pepco serves the entire District. Two general-service demand classes cover most commercial buildings.
| Utility | Rate classes | Demand charge as read | What it means for a battery |
|---|---|---|---|
| Pepco DC | GT LV (low voltage) | $28.15 per kW-month distribution, on the monthly maximum demand, all hours | The core of the DC case. A battery that clips the monthly max saves the full rate on every kW shaved. Transmission adds $2.39–$2.86 per kW. |
| Pepco DC | GT 3A | $15.11 per kW-month distribution, same basis | Larger accounts at a lower rate; PJM tags carry more of the case. |
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 Washington, DC
A $28.15 per kW demand charge
GT LV bills the highest 30-minute demand in the month at $28.15 per kW. A 250 kW battery that reliably shaves 200 kW could save the property on the order of $5,600 a month on that line alone before transmission.
PJM transmission tag, on the right supply
Pepco's network transmission charge is about $60 per kW-year on the account's transmission tag. On default service it is averaged across the class and the tag saves nothing; on competitive supply with pass-through it is real money.
SRECs, if solar is in the project
DC's solar carve-out is one of the highest-priced solar REC markets in the country, with a 2026 compliance ceiling of $440 per MWh. That value belongs to solar generation. Storage alone earns none of it.
State and utility programs
The District has no storage rebate; its incentive layer is federal, plus solar renewable energy credits where solar is part of the project.
| 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. |
| DC solar renewable energy credits (SRECs) | Market-traded; the 2026 alternative compliance payment ceiling is $440 per MWh, declining $20 per MWh a year | Certified solar generation | Storage alone earns zero SRECs under DC Code §34-1431. How adding storage to certified solar affects SREC metering is not settled in a published rule; KEEL does not assume a retrofit battery is neutral until it is. |
| PJM capacity and transmission tag management | Avoided capacity and network-transmission charges on the account's tags | Accounts on competitive supply with pass-through | On Pepco default (SOS) service the charge is class-averaged and the customer's own tag is not a billing determinant. KEEL checks the supply contract first. |
| District storage rebate | None found | — | The DC Sustainable Energy Utility's business rebates cover lighting, HVAC, refrigeration and motors; the Department of Energy & Environment lists no storage program. Recorded as not found rather than as a confirmed absence. |
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 Washington, DC
- Pepco's current rates were set under a multiyear plan that a court sent back to the Public Service Commission; the rates are in effect but the plan is being re-litigated.
- Tag savings in DC depend entirely on the supply contract. On standard offer service they are zero; KEEL will not show them unless the contract shows pass-through.
- Solar plus storage projects need an answer on how the battery is metered for SREC purposes before the SREC line is relied on.
- DC's corporate franchise tax is 8.25%, which affects the after-tax value of depreciation to a taxable owner.
How KEEL prices a Washington, DC project: model the all-hours monthly maximum against the GT LV or GT 3A distribution rate plus the small transmission demand line, add tag management only where the supply contract shows pass-through, and keep SRECs off a standalone battery entirely. Where solar is in scope, the SREC line is carried on the solar and the metering question is resolved before it is quoted.
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 DC incentive for commercial battery storage?
No storage rebate was found as of August 2026; the District's business efficiency rebates cover lighting, HVAC, refrigeration and motors. DC projects are priced on the federal credit and Pepco's demand charges, with PJM tag management where the supply contract allows it.
Does a battery earn SRECs in DC?
Not on its own. DC law defines a renewable energy credit as energy produced by a renewable source; storage is not one. SRECs belong to the solar generation in a paired project.
Which DC buildings pencil best?
GT LV accounts with a sharp monthly peak, because the $28.15 per kW demand charge is high enough to carry a battery on demand savings alone, and larger accounts on competitive supply where the transmission tag is passed through.
Have a Washington, DC 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.