Take Control of Your Energy Costs
Get a custom proposal and compare top-rated installers in under 2 minutes. 100% online, zero sales pressure.
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.
"Light years beyond anything I've seen in all my solar research."
Brad M., Terawatt User
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. Make informed decisions based on what is important to you.
Complex technology. Simple answers.
Inverters. Megawatts. Net metering. Terawatt AI speaks solar fluently so you don't have to. Ask in plain English, get real answers.
Commitments are scary. This one isn't.
Terawatt ensures an additional layer of warranties on top of manufacturer and installer warranties. Simple as that.
Transparent pricing.
Choose your path.
Complete pricing upfront. All financing options compared. No salesperson needed.
- •Complete design and pricing upfront.
- •Compare every financing option side by side.
- •Credits and rebates? Already included.
- •Terawatt AI answers anytime, day or night.
Design first. Complete proposal before talking to anyone.
Days of callbacks and home visits.
Compare side-by-side. Choose your options. Proposal instantly updates.
Salesperson walks you through their pitch.
Answers 24/7. Specific to your system.
Limited business hours only.
Track everything. Real-time updates, automatically.
Call to ask. Hope they answer.
Protected forever. Your system serviced for life.
If your installer closes, you're on your own.
Word on the block
"The best pricing, most UX friendly experience, and the process was seamless. If you need solar panels, go to Terawatt first and let their quoting system do the heavy lift"
Stanley Chan
Terawatt customer
"My solar will save me $950 in the first year. My bill is fixed which means that my savings will grow over time. On top of that, every time I pay my energy bill I am paying directly into my home equity and investing in my children's future because I own my solar system."
Sandra Plaisimond
Terawatt customer
"5 months after installation, the electricity bill continues to come to $0."
William Luquis
Terawatt customer
"I was able to cut my average monthly bill from $178 to $115, 35% of my average monthly bill. The solution they recommended cost me nothing but is saving me a lot."
Debora Reis
Terawatt customer
"These guys did all of the heavy lifting (research, planning, and coordinating) to make sure my needs were met. All doing so while saving the environment one roof at a time!"
Fang Yuan
Terawatt customer
Massachusetts Resident?
See what EmPower funded programs are available in your community.
Questions?
Receive a quote in 2 minutes. Choose your installer and financing at your own pace. Average activation takes 45 days. This includes permitting, installation, and utility interconnection approval, all managed by Terawatt AI with your installer.
Not if you don't want to. Get your complete quote, compare installers, and ask questions to our AI advisor—all without a single sales call. Share your contact info only when you're ready to move forward with your chosen installer.
Terawatt provides lifetime system service and warranty support. Even if your installer closes, we ensure your system continues operating and remains under warranty. You're protected for 25+ years.
Yes. Terawatt AI analyzes the roof, energy usage, utility rates, local codes, weather and other relevant data points to model the ideal solar system in seconds.
Terawatt serves all of Massachusetts and Rhode Island and is expanding to additional states in 2026. Enter your address to check coverage, it takes 10 seconds.
Ready to take control of your energy costs?
Get a personalized solar proposal in minutes. 100% online, zero pressure.
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