Take Control of Your Energy Costs
Get a custom proposal and compare top-rated installers in under 2 minutes. 100% online, zero sales pressure.
The same engine Terawatt runs across utility and commercial development — cutting the friction, complexity, and time out of every project it touches.
Trusted by 20+ communities and industry leaders
Three small steps. One giant leap in savings.
Your proposal. At the speed of (sun) light.
Enter your address and monthly bill. Terawatt designs your system with panels modeled on your actual roof. Select equipment, compare financing and review detailed financial analysis on your custom solar project.
Pick your match. Good looks aside.
Get transparent quotes before sharing your contact information. View instant pricing from multiple installers for your custom system. Choose based on reputation, service quality, and verified reviews.
Step forward. Or backward. It's your choice.
Built-in tools like scheduling and messaging put you in control of next steps. Automatic updates keep you in the loop.
Rated 5 out of 5
“Light years beyond anything I've seen in all my solar research.”
More energy. Less effort.
Why Terawatt is the best place to buy rooftop solar.
Instant design. Complete proposal.
See your system design, pricing, and savings in 2 minutes. Move forward when you're ready, not when someone calls you back.
The complete picture. Literally.
Your proposal includes a fully engineered system with panels modeled on your actual roof. See equipment specs, pricing, financing options, and your 25-year savings, all online.
One design. Different installers.
Get an apples-to-apples comparison between installers to eliminate the guesswork.
Complex technology. Simple answers.
Inverters. Megawatts. Net metering. Terawatt AI speaks solar fluently so you don't have to.
Commitments are scary. This one isn't.
Terawatt ensures an additional layer of warranties on top of manufacturer and installer warranties.
Massachusetts Resident?
See what EmPower funded programs are available in your community.
Ready to take control of your energy costs?
Get a personalized solar proposal in minutes. 100% online, zero pressure.