Will the Index Storage Credit raise my Con Edison bill?

Probably a little, since the credit is funded through the electric system, but the amount is small and hard to isolate on a statement. Batteries can also lower peak prices, which offsets part of the cost, so the net effect is genuinely uncertain.

Is this the same thing as the incentive for rooftop or community solar?

No. Those are separate programs aimed at smaller, customer-side systems. The Index Storage Credit is built for large, bulk-scale batteries that sell into the wholesale market.

What is a strike price, in plain terms?

It is a fixed reference number set when a project wins its contract. The credit then settles the gap between that number and what the battery earns in the market, paying up or clawing back.

Does winning a credit mean a battery is about to be built near me?

Not necessarily soon. An award still has to clear fire review, permitting, and interconnection, which in this city can take a year or more and sometimes stalls.

Lead story

Markets · Analysis

The Index Storage Credit: How New York Pays to Build Its Batteries

New York has promised a large build-out of battery storage by 2030, and it is paying for much of that build through a little-known contract called the Index Storage Credit. Here is how the credit works, who runs it, and what it means for a city that is wary of fire.

Filed: October 29, 2026
Section: Markets
Read time: 6 minutes

I · How the Index Storage Credit works

If you have seen a notice for a battery project on a lot in Sunset Park, the South Bronx, or along the Brooklyn waterfront, it is probably chasing this credit. The state wants roughly 6 gigawatts of energy storage on its grid by 2030 (a gigawatt is a billion watts, enough to cover a large slice of the city's demand at a given moment), and the Public Service Commission's storage roadmap leans on the Index Storage Credit to get the biggest, bulk-scale projects financed and built.

The credit is a contract-for-differences, which is a deal that settles the gap between two numbers. One number is a fixed strike price set when a project wins a competitive NYSERDA solicitation. The other is what the battery actually earns in the wholesale markets run by the New York Independent System Operator, the nonprofit that dispatches the state's grid. When the battery's market earnings fall below the strike, the credit pays the difference; when they run above it, the developer can owe money back. The exact settlement formula and the reference prices are spelled out in NYSERDA's solicitation documents, and they are worth reading before you trust any single headline number.

II · The honest math, and who pays

A strike price is meant to work as a floor. A battery that knows it has a predictable revenue floor can borrow money more cheaply, which lowers the cost of building it and, in theory, lowers what the public pays overall compared with letting projects sink or swim on volatile market prices alone. The credit is funded through the electric system, which means Con Edison customers and other ratepayers across the state carry some of it on their bills.

How much it adds to your bill is genuinely hard to pin down, and honest analysts disagree. The strike prices depend on each auction, on interest rates, and on interconnection costs that have been climbing. Batteries also push down peak prices by charging when power is cheap and discharging when it is dear, which can claw back part of the cost, so the net effect on a monthly bill is closer to 'it depends' than to any clean figure. Treat round numbers here with suspicion.

III · Who actually runs it

Four bodies share this work, and it helps to keep them straight. The Public Service Commission sets the targets and the policy through its energy storage proceeding. NYSERDA, the state energy authority, runs the solicitations and holds the contracts. NYISO operates the wholesale markets where the batteries earn and get dispatched. Con Edison, the local utility, handles the interconnection where a project plugs into the city's distribution grid.

That division matters for anyone trying to track a specific project. A siting fight plays out at the city and utility level; a question about the subsidy's size lives in NYSERDA's filings; a question about whether the whole target is on schedule lives at the Commission. No single agency can answer all three, and anyone who tells you otherwise is guessing.

IV · Siting a battery in a fire-wary city

New York City is dense, and it has watched lithium-ion battery fires make the news, from e-bike packs in apartments to outdoor storage sites upstate. After several battery fires in 2023, the state convened an inter-agency fire safety working group and tightened its guidance, and the FDNY already runs one of the stricter permitting regimes in the country for outdoor battery storage. Projects generally must pass large-scale fire tests (the industry standard is a protocol known as UL 9540A) before they are allowed near people.

This is why most bulk-scale projects land on outer-borough lots, former industrial parcels, or upstate sites with room for setbacks, rather than in the middle of Manhattan. It also means schedules slip. A project can win an Index Storage Credit award and still spend a year or more in fire review and interconnection study, so an award is a start, not a ribbon-cutting.

V · Worth watching this month

1. Watch NYSERDA's energy storage page for the schedule and results of the next bulk Index Storage Credit solicitation, which sets the strike prices that drive everything else.

2. Watch the Public Service Commission's energy storage proceeding for status filings on whether the roughly 6 gigawatt by 2030 target is on pace, routine paperwork that occasionally carries real news.

3. Watch NYISO's market and interconnection-queue reports for how much storage is actually clearing, a better reality check than any target.

4. Watch for FDNY and state fire working group updates, since a change in siting or testing rules can move more projects than any single auction.

5. Watch your own Con Edison bill and its supply charges over the coming year, the one place this policy eventually shows up for you.

Questions

Will the Index Storage Credit raise my Con Edison bill?

Probably a little, since the credit is funded through the electric system, but the amount is small and hard to isolate on a statement. Batteries can also lower peak prices, which offsets part of the cost, so the net effect is genuinely uncertain.
Is this the same thing as the incentive for rooftop or community solar?

No. Those are separate programs aimed at smaller, customer-side systems. The Index Storage Credit is built for large, bulk-scale batteries that sell into the wholesale market.
What is a strike price, in plain terms?

It is a fixed reference number set when a project wins its contract. The credit then settles the gap between that number and what the battery earns in the market, paying up or clawing back.
Does winning a credit mean a battery is about to be built near me?

Not necessarily soon. An award still has to clear fire review, permitting, and interconnection, which in this city can take a year or more and sometimes stalls.

Sources

NYSERDA, Energy Storage program, State energy authority (.gov); where the solicitations and the storage roadmap are posted. · www.nyserda.ny.gov/All-Programs/Energy-Storage
New York Department of Public Service, document search, State regulator (.gov); use its document search for the Public Service Commission's storage orders and status filings. · www.dps.ny.gov
New York Independent System Operator (NYISO), Grid operator for the state; markets, dispatch, and interconnection-queue reports where storage actually competes. · www.nyiso.com
FDNY, energy storage systems, City fire department (.gov); the siting and permitting rules for batteries in the five boroughs. · www.nyc.gov/site/fdny/index.page
Con Edison, The local utility; your bill, supply charges, and the interconnection of projects into the city grid. · www.coned.com