Many different stakeholders want to better understand typical size, cost and performance information of installed residential solar systems in Minnesota. However, for understandable reasons, installers are hesitant to share trade secret information, particular as it relates to system components, sizing and particularly system costs.

As a mission-driven organization committed to advancing underserved solar and energy efficiency market segments, Eutectics has collated information about 82 residential solar projects installed across Minnesota between 2015 and 2018. These solar installations represent a wide swath of the state, including installations at homes served by Xcel Energy, Minnesota Power, Otter Tail Power, municipal utilities and electric cooperative utilities.

While this survey is not scientific, nor comprehensive, the projects represent 6 different solar contractors’ approach to the residential solar marketplace in Minnesota.

The 82 projects totaled:

492.1 kilowatts (kW) of nameplate solar capacity;

$1,754,812 in total project cost; and

584,614 kilowatt hours produced in the first full year of operation, resulting in $78,923 in first-year energy savings.

 

Across these 82 residential solar project, a typical solar PV installation averages:

6.01 kW

$21,401.15 total project cost.

7,129 kilowatt hours produced in the first full year of operation, resulting in $1,033.71 in first-year energy savings.