Rooftop solar systems sized to your household's energy use, installed by our in-house crew across the Greater Toronto Area.

A residential solar system converts sunlight into electricity your home uses directly, with any surplus exported to the grid under Ontario's net metering rules. We design every system from twelve months of your actual utility usage so the array is sized to what your household needs, not an arbitrary roof-filling package.
Every residential install from Terawatt Solar includes a site assessment, structural review of your roof, a custom layout, permitting and utility interconnection paperwork, installation by our own certified crew, and a 25-year equipment and workmanship warranty.
Most residential projects move from signed proposal to permission-to-operate in six to ten weeks, depending on your local utility's interconnection queue and municipal permitting timelines. Physical installation itself is typically completed in one to two days.

A homeowner
Our design team modeled twelve months of utility usage and roof conditions before proposing a system sized to the property's needs.
The system was installed by our in-house crew within the proposed timeline and is performing in line with the original production estimate.