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Indiana Interconnection Standards

Date Last Updated8/12/2014
Policy TypeInterconnection Standard
State/FederalIN
Policy Administrator/Contact OfficeIndiana Utility Regulatory Commission (IURC)
Policy Initiation Date3/6/2006
Policy SummaryThe IURC adopted rules governing the interconnection of distributed generation (DG), including CHP. Indiana's interconnection rules require the state's investor-owned utilities to provide three levels of interconnection to customer-generators:
  • Level 1: applies to inverter-based systems up to 10 kW. These systems must comply with IEEE 1547 and UL 1741 standards. There are no application fees or other fees. There are specific limits on a single system's potential impact and the aggregate potential impact on the grid under Level 1 interconnection.
  • Level 2: applies to systems up to 2 MW. These systems also must comply with IEEE 1547 and UL 1741 standards. A utility may charge fees of up to $50, plus $1 per kW of the system's nameplate capacity, plus the cost of any minor modifications to the electric distribution system or additional review. Costs for engineering work may not exceed $100 per hour. There are specific limitations on a single system's potential impact and the aggregate potential impact on the grid.
  • Level 3: applies to systems that do not qualify for either Level 1 or Level 2 interconnection procedures. For Level 3 interconnection review, a utility may charge up to $100 plus $2 per kW of the system's nameplate capacity, as well as charge for actual time spent on any impact or facilities studies required by Indiana's rules. Costs for engineering work done as part of any impact or facilities study may not exceed $100 per hour.
A mutual indemnification provision and reasonable time limits on application review are included in Indiana's interconnection rules. Customer-generators must obtain "only reasonable amounts of insurance against risks for which there is a likelihood of occurrence." Utilities may require customers to install an external disconnect switch at the customer's expense. Any disputes between customers and utilities will be settled according to the IURC's consumer-complaint rules.
CHP Eligibility RequirementsBoth fossil-fueled and renewably-fueled CHP systems are eligible for standardized interconnection.
Eligible Project Size (MW)All sizes are eligible for standardized interconnection.
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