Solar installers in Mercer County
91 companies have installed solar on 2,714 homes here since 2023. Covers Hamilton Township, Trenton, Ewing Township, Lawrence Township, West Windsor Township, Princeton and nearby towns.
Ranked by homes installed, which shows who’s active here, not who’s best. Prices are each company’s median for systems sold outright, shown when it sold at least 10.
Towns in Mercer County: Hamilton Township, Trenton, Ewing Township, Lawrence Township, West Windsor Township, Princeton, East Windsor Township, Robbinsville Township, Hightstown, Pennington, Hopewell, Groveville.
Other New Jersey counties
How much does solar cost in Mercer County, NJ?
There weren't enough Mercer County systems bought outright for a county figure. Across the U.S., homes paid a median $4.10/W installed in 2023–2025, about $26,700 for a 6.5 kW system.
Which solar companies install in Mercer County, NJ?
91 installers have put in home systems in Mercer County since 2023, the busiest being Sunrun, SunnyMac, Momentum Solar, Trinity Solar, Tesla.
Installed prices and installers from public installation records: Lawrence Berkeley National Laboratory’s Tracking the Sun (systems installed through 2025) and state program files from California, New York, New Jersey, Connecticut, Illinois and Oregon, which run into 2026. Prices are in dollars per watt of panel capacity (DC), before rebates and tax credits, for homes that bought their system; leased systems and systems with batteries are left out.