At Terawatt Solar, we offer homeowners a free evaluation of their roof’s potential for solar. We use design strategies and select technologies to optimize solar yield and minimize cost.

A first analysis is done remotely. Our team then visits your home for a second, detailed analysis.

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If you want to get a general idea of whether your roof is a good fit to install solar panels under one of our two solar programs, here are some things we look at in determining your earnings potential:

Orientation: Roofs with southern exposure are ideal when it comes to installing solar panels, south-western and south-eastern facing roofs are generally not too shabby either and east and west-facing roofs can also still generate sufficient amounts of energy to make a solar panel installation on your residential home worthwhile.

If you don’t know which way your roof surfaces are facing, the satellite view in Google Maps can be very helpful.

Angle: The ideal slope for a solar panel installation on a pitched roof is 30-40 degrees. A minimum of 15 degrees is needed for any kind of dirt or snow to slide off the panel.

Flat roofs generally work for solar panel installations but are not eligible for our FREE Solar program as they require different mounting solutions.

Obstructions and shading: Don’t get us wrong, we love trees but they may cast shades on your solar panels that limit energy production. Similarly, we lookout for larger buildings or structures that may cast a shadow on your solar panel system. Last but not least, your vent may stand in the way of optimal solar production.

Roof condition: While shingle replacement is possible after you’ve installed your solar system, you want to get off to a good start on shingles that are in good working order. After all, your solar system may be with you for the next 40 years!