The Value Stack On Your Con Ed Bill

I · What the Value Stack actually pays for

Maybe you just signed a community solar subscription and the first credit on your Con Edison bill looks nothing like the number the sales rep quoted. Maybe you are weighing panels for a rowhouse roof in Bedford-Stuyvesant and the installer's payback estimate rests on a word you have never seen spelled out. Either way, the gap is usually not a billing error. It is the Value Stack, doing what the state designed it to do.

Since 2017, New York has not paid most new solar projects through net metering (the old one-for-one swap where every kilowatt-hour you export rolls your meter backward at the full retail rate). Projects built after that shift are paid through the Value of Distributed Energy Resources tariff, usually called VDER or the Value Stack, which breaks the worth of your exported power into separate pieces and prices each one on its own. Energy value tracks the wholesale price NYISO (the New York Independent System Operator, which runs the state's bulk power market) sets hour by hour, so it rises and falls with the grid. Capacity value pays a smaller amount for being available when demand peaks, and environmental value is pegged to the state's carbon price or the going rate for a clean-energy credit, whichever is higher at last public report.

II · Why the address matters more here

Two more pieces are where New York City gets interesting. The Demand Reduction Value pays you for easing load during the system's peak hours, and the Locational System Relief Value pays extra in specific pockets of the grid the utility has flagged as strained. For community solar there is also a Community Credit, a flat adder the state set to get projects built. Not every project earns every piece.

In much of upstate New York the energy value does most of the work and the location pieces are small or zero. In Con Edison territory the math can tilt the other way, because the city's grid is dense, old in places, and expensive to reinforce, so the location values can rival or even beat the raw energy value. A rooftop in a constrained Queens or Bronx network may be worth more to the grid, and paid more, than an identical array a few miles away. That is also why the number is opaque to the people signing up: a project's value is set where it connects, not where the subscriber lives, so two neighbors can see different credits from different farms.

III · Reading your own credit

On a Con Ed bill the VDER credit usually shows up as a dollar line, not a reversed meter reading, which trips up people who expected net metering's backward spin. The dollars reflect last month's exports multiplied by the stacked value, and because energy value floats, the credit per kilowatt-hour will not be identical month to month. Save a few bills and you will see it breathe, higher in a hot summer, thinner in the shoulder months.

If you are shopping, ask the installer or subscription company to show the assumed value per kilowatt-hour and which components they counted. A quote that leans hard on the Community Credit, or on a location adder that may not last, is a quote worth questioning, because the state has trimmed some of these adders over time as projects filled the queue. Con Edison publishes the current Value Stack rates, broken out by component and service class, and the Public Service Commission orders behind them are public too. Honest math here means a range, not a single confident figure.

IV · Worth watching this month

1. Con Edison periodically updates its published Value Stack rate sheets, so check the current component values before trusting any quote more than a few months old.

2. The Public Service Commission's long-running VDER proceeding (Case 15-E-0751) still sees filings that can change adders and eligibility, and the comment windows are mostly routine but worth a glance.

3. NYSERDA's NY-Sun program adjusts its incentive blocks as capacity fills, which can shift a new rooftop or community project's economics without touching the Value Stack itself.

4. Watch whether your local network appears on Con Edison's list of areas eligible for the Locational System Relief Value, since that status can be added or removed as the grid changes.

5. NYISO wholesale prices move with the seasons, so expect the energy-value slice of your credit to run higher during summer peaks and lighter in spring and fall.