Dashboard
Cost, consumption, demand, and rates across your billing history.
Energy delivery vs. demand delivery
Your delivery bill has two very different meters running. One tracks how much energy you use; the other tracks your single highest spike, and the spike is what dominates.
Charged on the total volume of energy you move all period. A small per-kWh rate on every kWh used.
251,800 kWh × 5.281¢$13,298/yr
Charged on your single highest 15-minute peak. A steep rate on one moment of power, not on volume.
peak 148 kW at $17.60/kW$25,091/yr
Demand delivery is 1.9× energy delivery over this period. Because it is a rate on your peak kW, shaving that one spike cuts it dollar for dollar.
Demand charges are about 38% of your bill. Cutting your monthly peak 10% could stop wasting roughly $2,509 a year.
Peak demand vs contract (kW)
- Peak demand
- Contract demand
- Demand rate
Each bar is that period's peak demand, your highest power draw, in kilowatts. The stepped line is your contract demand, the level you commit to. The right-axis line is the demand rate, the price per kW. Peak times rate is the demand charge shown in the Demand cost chart.
Demand cost
- Demand charge
- Demand share of total cost
The bars and the line can move in opposite directions, and that is expected. The line is the demand charge as a share of your whole bill, so when summer energy use lifts your total cost faster than the demand charge itself, demand dollars can rise while demand's share of the bill falls.
Shaving your busiest moments
Based on the interval data you uploaded.
Con Edison charges you in two ways. One is the total electricity you use. The other is a separate fee set by your single busiest moment in the month, the one time the most equipment happens to be running at once, for example a hot afternoon with everything going together. Even if that moment lasts only a few minutes, it sets that fee for the whole month.
A small battery that quietly covers the top during those few busy minutes could stop you wasting roughly $2,927 a year, about a tenth of what you pay for peak demand, without changing anything about how you run the place.
Each bar is a month's busiest 30 minutes. The dashed line is where a battery would hold your demand, at 104 kW. The orange tops are the waste it would remove, about $2,927 a year.
To hold your demand at 104 kW, you would need about 6 home battery units (about the size of a Tesla Powerwall each). That is roughly 44.0 kW of output and 71.6 kWh of storage.