A Guide to Photovoltaic and Wind Generator Systems

Interconnection Requirements If you choose to install a photovoltaic (PV) or wind power source and operate it in parallel with the Ameren distribution system, the following is required for interconnection: Ameren must review your project BEFORE operation to determine whether the PV or wind system could adversely affect the safety, reliability or quality of local electric utility service.
		1.	Ameren engineers will perform an Interconnection Study (at your expense) to review your equipment. Your system must include all necessary equipment to properly protect Ameren’s employees and other customers from any disruption or hazardous condition that could be caused by your PV or wind system. Requirements can vary depending on the size, type and location of your PV or wind system.
		2.	A Parallel Operating Agreement must be executed. This is a contract between you and Ameren that authorizes you to operate your PV or wind system in parallel with the Ameren system.
		3.	Once your system is installed, Ameren will conduct a final inspection before allowing parallel operation of the PV or wind system.
Your PV or wind system must comply with all applicable codes, laws and regulations. Your PV or wind system must be capable of automatically disconnecting from the company system. During an outage on the utility system, an interconnected PV or wind system can back-feed an Ameren line, creating a hazardous condition. To prevent this, the PV or wind system must either automatically disconnect from or cease to energize Ameren electric lines when a loss of the utility company’s supply occurs. Your PV or wind system must be installed in accordance with current IEEE standards and be UL-listed. Non-islanding inverters are required. For PV or wind systems greater than 10kW output, you must submit operating and instruction manuals for the specific model of equipment being installed to Ameren for review prior to connection of the equipment. Your system must include a manual visible disconnect that is accessible to Ameren staff and lockable with Ameren locks. This allows utility company crews to disconnect the PV or wind system from the utility company system for maintenance, reliability and safety concerns. Your system must include appropriate wiring and metering if you want to sell excess electricity from your PV or wind system back to the Ameren system. Also, sales of electricity are regulated by various state and federal agencies. It is strongly recommended that you discuss the details of your project with Ameren personnel at the earliest possible time and investigate all state and federal agency requirements before proceeding.
				If you decide to proceed with a PV or wind project: In Illinois, call 888.327.2477 or email renewablesillinois@ameren.com In Missouri, call 314.554.2646 or email lcosgrove@ameren.com Review the factors to consider before starting a renewable energy project.