Specs and Tariffs

Community Local Generation (DG) Projects

Community DG Procedural Requirements (PDF)

Systems Over 5 MW

If you’re installing a system above 5 MW, email DGExpert@conEd.com for guidance on specification.

Con Edison Distributed Generation Guide (PDF) for a system over 5 MW or emergency generation.

General Guides and Specifications for Local Generation Customers Who Do Not Earn Private Solar Credits

Interconnection Guide for Large Combined Heat and Power Projects for projects between 5 and 20 MW.     

Local Generation General Requirements: Con Edison's handbook of general requirements for electrical service to dispersed generation.     

Generator Operation and Maintenance: General requirements for the operation and maintenance of local generation equipment at your site.   

Specifications for High-Tension Service Customers (for Local Generation Voltage Connection > 4KV)

High-Tension Customer Service Requirements (PDF): Con Edison's general specification for high-tension service customers.     

High-Tension Customer Operation and Maintenance (PDF): Operation and maintenance of all equipment if you have high-tension service at your premises.     

Specifications for Emergency Generation

Emergency Generation “Break-Before-Make” Switch Load Transfer (PDF): This describes the requirements for the transfer of load from the company's supply to or from your emergency generators.

Emergency Generation Transition Switch Load Transfer (PDF): This describes the requirements for a switch that allows for uninterrupted power while transferring load from emergency generation back to Con Edison supply, through a brief “make-before-break” transition switch.

Definitions of Electric and Gas Service and Billing for Local Generation Customers

Tariff for Net Metered Customers only: Rider R, page 70: The rules and rates for customers with local generation who qualify for private solar credits.     

Tariff for all other customers using local generation to sell electricity, SC-11, page 83: The rules if you sell power to Con Edison but do not qualify for private solar credits. This service is called “buy back” because Con Edison purchases your energy.     

Tariff for emergency export program, General Rule 8, page 78: The rules for emergency export to the company's distribution system. This category applies only if your generation is connected at the high-tension level, and is limited to generation in excess of your load.     

Tariff for all customers using local generation to support their own load: Standby Service, page 154: The rules if you use local generation strictly to support some or all of your own load, and do not sell any to Con Edison. This service is called “standby” because Con Edison must be prepared to support all of your load in the event that local generation is not available.    

Rider H Commercial, page 37

Rider J Residential, page 57

Steam tariff SC-4, page 24: For customers who install combined heat and power local generation in Con Edison’s steam service territory and use Con-Edison-supplied steam for backup or supplemental use.

Offset Tariff FAQ

How We Cash Out Your Excess Energy

Residential customers (PDF): If you’re a residential customer, your excess solar credits are cashed out every January by default. You can choose to cash out in any month you’d like. But, you can only change your cash-out month once. Most customers choose to cash out their solar banks during a month when they anticipate having the fewest solar credits. This is because the cash-out value – the avoided cost of energy – is less than the value of applying your solar credits to your energy consumption. For this reason, it is recommended that you monitor your energy use for a full year before changing your cash out month.

Micro-CHP customers (PDF): If you have micro-CHP, fuel cell, or farm waste electric generating equipment, all excess kilowatt hours of energy sent to the grid are “cashed out” after every billing cycle. We do this by multiplying the excess kilowatt hours by the avoided cost of energy. The avoided cost of energy is determined by the average wholesale price of energy for the year, increased by 6.6 percent. The resulting dollar value is applied to your account as a credit and your kilowatt hour bank is reset to zero.

Demand-billed customers (PDF): If you’re a demand billed customer with solar or wind electric generating equipment, all excess kilowatt hours of energy sent to the grid are “cashed out” after every billing cycle. We do this by multiplying the excess kilowatt hours by a rate approximate to your retail rate for that month. The resulting monetary credit is applied to the account up to the total amount of other charges (i.e. basic service charges and demand charges) in the billing period. Any credit in excess of the billing period’s other charges is converted back to kilowatt hours and carried forward to future cycles.

Energy-only customers (PDF): If you’re an energy-only customer with solar or wind electric generating equipment, all excess kilowatt hours of energy sent to the grid are carried forward and used to offset energy consumption in future billing cycles. There is no cash out.

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