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Missouri Interconnection Standards

Date Last Updated8/13/2014
Policy TypeInterconnection Standard
Policy Administrator/Contact OfficeMissouri Public Service Commission (PSC)
Policy Initiation Date6/25/2007
Policy SummaryMissouri PUC requires all of the state's electric utilities, including investor-owned, municipals and electric cooperatives, to offer standardized interconnection to renewable energy systems including CHP up to 100 kW.

Under the state rules, utilities must offer a net-metering tariff or contract that is identical in electrical energy rates, rate structure, and monthly charges to the contract or tariff that the customer would be assigned if they were not operating a distributed generation including CHP system. Utilities may not charge the customer any additional standby, capacity, interconnection, or other fees that are not charged to all customers. In June 2009 the PSC adopted a minimum liability insurance requirement of $100,000 for systems >10 kW, whereas systems up to 10 kW are not required to have additional liability insurance.

Interconnected systems must meet all applicable safety, performance, and reliability standards established by local code authorities, the National Electrical Code (NEC), the National Electrical Safety Code (NESC), the Institute of Electrical and Electronics Engineers (IEEE), and Underwriters Laboratories (UL) for distributed generation including CHP. Prior to interconnection, a customer must furnish the utility with certification from a qualified professional electrician or engineer that the installation complies with the established safety and operating requirements. Utilities may require customers to provide an external disconnection switch. Utilities must review and respond to the customer within 30 days for systems up to 10 kW, and within 90 days for systems >10 kW.
CHP Eligibility RequirementsFuel cells using renewable fuels are eligible under the standards and potentially other sources of energy that are certified as renewable by the Missouri Department of Natural Resources (DNR).
Eligible Project Size (MW)Standardized interconnection applies to systems up to 100 kW.
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