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Incentives/Policies for Renewables & Efficiency

Printable Version
Interconnection Guidelines   

Last DSIRE Review: 04/18/2013
Program Overview:
State: Missouri
Incentive Type: Interconnection
Eligible Renewable/Other Technologies: Solar Thermal Electric, Photovoltaics, Wind, Hydroelectric, Fuel Cells using Renewable Fuels
Applicable Sectors: Commercial, Industrial, Residential, Nonprofit, Schools, Local Government, State Government, Fed. Government, Institutional
Applicable Utilities:All utilities
System Capacity Limit:100 kW
Standard Agreement:Yes
Insurance Requirements:Vary by system size and/or type; levels established by PSC
External Disconnect Switch:Utility's discretion
Net Metering Required:Yes
Web Site:
Authority 1:
Date Enacted:
Date Effective:
R.S. Mo. ยง 386.890
Authority 2:
Date Enacted:
Date Effective:
4 CSR 240-20.065
02/28/2009 (subsequently amended)
Missouri enacted legislation (S.B. 54) in June 2007 requiring all of the state's electric utilities -- including municipal utilities and electric cooperatives -- to offer net metering to customers with systems up to 100 kilowatts (kW) in capacity that generate electricity using wind energy, solar-thermal energy, hydroelectric energy, photovoltaics (PV), fuel cells using hydrogen produced by any of these resources, and other sources of energy certified as renewable by the Missouri Department of Natural Resources. Systems must be intended primarily to offset part or all of a customer's own electrical energy requirements, and must be located on a facility owned, operated, leased or otherwise controlled by the customer. Administrative rules to implement S.B. 54 adopted by the Missouri Public Service Commission (PSC) took effect in February 2009. A subsequent June 2009 rulemaking order revised insurance requirements for customer-generators, effective September 30, 2009.

The PSC's rules only apply to the state's investor-owned utilities. Utilities not regulated by the commission -- electric cooperatives and municipal utilities -- were required to adopt initial rules by October 1, 2008, including regulations ensuring that simple contracts will be used for interconnection and net metering. The adopted rules include an all-in-one document that includes a simple interconnection request, simple procedures, and a brief set of terms and conditions.

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 the customer were not an eligible customer-generator. Utilities may not charge the customer any additional standby, capacity, interconnection, or other fee or charge that would not otherwise be charged if the customer were not an eligible customer-generator.

Systems must meet all applicable safety, performance, interconnection and reliability standards established by any 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. Utilities may require customers to provide a switch, circuit breaker, fuse or other easily accessible device or feature that allows the utility to manually disconnect the system.

In June 2009 the PSC adopted a minimum liability insurance requirement of $100,000 for systems larger than 10 kW. Systems of 10 kW and smaller are not required to have additional liability insurance. Insurance requirements may be met with an additional insurance policy or an endorsement on an existing policy. These requirements replace the former $100,000 minimum requirement for systems of up to 10 kW and $1 million minimum requirement for systems larger than 10 kW.

Applications for interconnection must be accompanied by a plan for the customer's system, including a wiring diagram and specifications for the generating unit. Utilities must review and respond to the customer within 30 days for systems up to 10 kW, and within 90 days for systems greater than 10 kW. 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.

Any costs incurred by a utility under Missouri's net-metering statute are recoverable in the utility's rate structure. The estimated generating capacity of all net-metered systems counts towards the respective utility's accomplishment of any renewable-energy portfolio target or mandate adopted by Missouri. Each utility must file an annual report describing the status of its program.

  Energy Loan Program
Missouri Department of Economic Development
Division of Energy
301 W. High St., Rm 720
P.O. Box 1766
Jefferson City, MO 65102-0766
Phone: (855) 522-2796
Phone 2: (573) 526-7770
Web Site:
  Dan Beck
Missouri Public Service Commission
P.O. Box 360
Jefferson City, MO 65102
Phone: (573) 751-7522
Fax: (573) 751-0429
Web Site:
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Disclaimer: The information presented on the DSIRE web site provides an unofficial overview of financial incentives and other policies. It does not constitute professional tax advice or other professional financial guidance, and it should not be used as the only source of information when making purchasing decisions, investment decisions or tax decisions, or when executing other binding agreements. Please refer to the individual contact provided below each summary to verify that a specific financial incentive or other policy applies to your project.

While the DSIRE staff strives to provide the best information possible, the DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. make no representations or warranties, either express or implied, concerning the accuracy, completeness, reliability or suitability of the information. The DSIRE staff, the N.C. Solar Center, N.C. State University and the Interstate Renewable Energy Council, Inc. disclaim all liability of any kind arising out of your use or misuse of the information contained or referenced on DSIRE Web pages.

Copyright 2013 - 2014 North Carolina State University, under NREL Subcontract No. XEU-0-99515-01. Permission granted only for personal or educational use, or for use by or on behalf of the U.S. government. North Carolina State University prohibits the unauthorized display, reproduction, sale, and/or distribution of all or portions of the content of the Database of State Incentives for Renewables and Efficiency (DSIRE) without prior, written consent.