Connecticut - Requirements for Solar Power Installation

Connecticut State licensing requirements for solar power installers and solar power installations

The rules that regulate the installation of solar powersystems are different in each state and even sometimes from county to county. It is important that you are aware of these rules as a potential customer because often it is a condition of receiving rebates and incentives that your system meets these requirements. We have created pages which will help you make sure your installer is properly licensed and assist you to ask your installer the right questions about the system they are proposing to install for you, generally the following needs to be considered;

  • Licensing requirements for Solar Installers in each state
  • Equipment Standards or Certification
  • Interconnection Standards and other requirements

We have done our best to get as much info as we can, as always the people who know the current state of play in your area are you local solar power professionals.

Licensing requirements for Solar Installers in Connecticut

Solar Installers are required to register with the Connecticut clean energy finance and assessment authority (CEFIA), CEFIA has approved a group of PV contractors (Approved PV Contractors) and they can be found on their website. All systems must be installed by appropriately licensed Connecticut electricity contractors.

Building Energy Code

In Connecticut residential solar power installations must conform to; 2009 IECC, mandatory state wide; may use REScheck to show compliance.

Interconnection Regulations (small generator)

In Connecticut residential solar power installations must conform to; Connecticut's interconnection guidelines, like FERC's standards, include provisions for three levels of systems:

  • Certified, inverter-based systems no larger than 10 kilowatts (kW) in capacity (application fees: $100);
  • Certified systems no larger than 2 megawatts (MW) in capacity (application fees: $500); and
  • All other systems no larger than 20 MW in capacity. Note that the guidelines include "additional process steps" for generators greater than 5 MW (application fees: $1000, study fees will also apply).

Connecticut's guidelines include a standard interconnection agreement and application fees that vary by system type. However, Connecticut's guidelines are stricter than FERC's standards, differing from the federal standards in several significant ways:

  • Customers are required to install an external disconnect switch and an interconnection transformer.
  • Customers must indemnify their utility against "all causes of action," including personal injury or property damage to third parties.
  • Customers are required to maintain liability insurance in specified amounts based on the system's capacity.
  • In addition, the utilities were required to collaboratively submit to the DPUC a status report on the research and development of area network interconnection standards.

The guidelines address requirements for study fees and include technical screens for each level of interconnection. Utilities and customers must follow general procedural timelines.


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