Solar, batteries, heat pumps & more in Waltham, MA.
Nexis Power is the Forbes #1 home-energy team serving Waltham: licensed for solar, battery storage, heat pumps, roofing and electrical, all under one roof. $0 down, every rebate filed for you.
Your local energy team
Why Waltham homeowners choose Nexis
From two-families near Moody Street to capes and colonials in the Highlands and Warrendale, Waltham homes have real Massachusetts energy costs and real savings on the table. Nexis designs, permits, installs and services solar, batteries, heat pumps, roofing and electrical for Waltham families, and we handle the Mass Save and SMART paperwork so you don't have to. Waltham homeowners get the full Eversource incentive stack, and we are close by in Waltham for assessments and service.
Because we're licensed across five trades in-house, your solar, roof, panel and heat-pump work happens on one timeline with one accountable team — not a chain of subcontractors pointing fingers.
What we do in Waltham
Every home-energy service, one licensed team
Solar
Owned rooftop solar that offsets your bill for decades — net metering + the 20-year SMART incentive.
Explore Solar →Battery Storage
Keep the lights on in outages and earn ConnectedSolutions payments for stored power.
Explore Battery →Heat Pumps & HVAC
Retire the oil burner — whole-home comfort with up to $8,500 in Mass Save rebates.
Explore Heat →Roofing
Durable, warrantied roofs built for New England winters — and solar-ready if you want it.
Explore Roofing →Electrical & EV
Panel upgrades, SPAN smart panels, and Level 2 EV chargers by licensed master electricians.
Explore Electrical →Commercial
Solar, storage and heat pumps for MA businesses — modeled around your ROI and incentives.
Explore Commercial →Why choose Nexis
The most credible energy company in Massachusetts
Forbes #1 in Boston
Ranked the #1 solar company in Boston in 2024 and 2025 — with a 5.0★ rating across 139+ reviews.
Licensed across 5 trades
Solar, roofing, HVAC and electrical in-house (MA HIC #209646 · CSL CS-106943 · Master Electrician 8785 A1) — one accountable team, no subcontractor finger-pointing.
Mass Save HPIN installer
On the Heat Pump Installer Network, which is what unlocks the top-tier rebates — and we file every form for you.
$0 down to start
Flexible financing on every service, and we handle all rebate and permit paperwork end to end.
Massachusetts pays you
Waltham qualifies for the full incentive stack
Most Waltham homes are served by Eversource, so they can stack net metering, the 20-year SMART solar incentive, up to $8,500 in Mass Save heat-pump rebates (up to $16,000 if income-eligible) plus the 0% HEAT Loan, and battery ConnectedSolutions payments. We model exactly what your address qualifies for and file all of it.
See the details on our Massachusetts incentives page.
Recent work near Waltham
Trusted equipment we install
5.0★ · 139+ reviews
What our customers say
Nexis handled our solar, panel upgrade and battery as one project — one crew, one timeline, and they filed every rebate. Painless.
They actually knew the Mass Save program cold and got us the full heat-pump rebate. No other quote came close on value.
Forbes #1 for a reason. Professional, licensed, and they didn't disappear after the install like our last installer did.
Waltham FAQ
Answers for Waltham homeowners
Yes. Waltham is part of our Middlesex County service area. We're close by in Waltham, with same-week appointments across Waltham.
Eversource delivers power in Waltham, so Mass Save rebates, net metering and the SMART incentive all apply.
Usually within the same week. Waltham is a short drive from our Waltham headquarters.
Yes — MA Home Improvement Contractor #209646, Construction Supervisor CS-106943, Master Electrician 8785 A1, and a Mass Save Heat Pump Installer Network member. Fully insured.
Most projects start at $0 down with flexible financing, and the assessment is always free with no obligation.
Ready when you are
Book your free Waltham assessment
Same-week appointments across Waltham and nearby towns. We bring the rebate math — you get a lower bill and a more comfortable home, $0 down to start.