Tesla Powerwall 3 Cost and Installation in Massachusetts
Tesla’s most powerful and efficient home battery system has arrived — and Valley Solar is proud to be the first Tesla Certified Installer to bring the Powerwall 3 to Western Massachusetts.
Introducing the Tesla Powerwall 3
The Powerwall 3 represents Tesla’s next generation of home energy storage — combining a high-capacity lithium-ion battery with a built-in solar inverter and new smart-grid capabilities.
Timeline of Tesla’s Home Battery Evolution
- 2015: Tesla launches the original Powerwall, bringing EV-grade battery tech to homes.
- 2016: The Powerwall 2 doubles capacity and streamlines installation.
- 2021: The Powerwall+ debuts with an integrated inverter for solar + storage pairing.
- 2024: The Powerwall 3 officially launches, offering higher output, built-in solar integration, and superior thermal performance.
As of 2025, the Powerwall 3 is widely available in Massachusetts — exclusively through Tesla Energy partners such as Valley Solar.
Key Benefits of the Tesla Powerwall 3
Lower Electricity Bills
- Self-supply mode: Store daytime solar energy and use it at night to reduce grid reliance.
- Grid sharing programs: Participate in ConnectedSolutions and earn seasonal cash payments.
- Utility rate optimization: Smart scheduling avoids charging during high-cost peak hours.
Whole-Home Backup Power
- Instant, automatic backup for your entire home, not just select circuits.
- Powers large appliances, including HVAC and EV chargers.
- Works seamlessly with generator integration for maximum resilience.
Smarter Solar Integration
- Built-in 11.5 kW solar inverter eliminates the need for separate hardware.
- Ideal for new solar installations or retrofits.
- Ready for future automation, including smart load and EV control.
Cold-Climate Ready
- Advanced liquid thermal management ensures stable operation from –20°F to 110°F.
- Designed for outdoor installation — no indoor battery closet needed.
What the Powerwall 3 Can Power
With up to 11.5 kW continuous power and 150 LRA of starting current, a single Powerwall 3 can run virtually any load in a typical Massachusetts home — refrigerators, lights, Wi-Fi, well pumps, sump pumps, HVAC systems, and more.
- Continuous Power: 11.5 kW
- Energy Capacity: 13.5 kWh per unit
- Expandable: Up to 4 Powerwall 3 units (46 kW continuous)
- Backup Duration: 1–2 days typical, extendable indefinitely with solar recharge
In 2025, Tesla also released the Powerwall DC Expansion (DCX) — an add-on module that adds 13.5 kWh of storage to double runtime during long outages.
Powerwall 3 vs Powerwall 2
| Feature | Powerwall 2 / + | Powerwall 3 |
|---|---|---|
| Inverter Integration | Separate / partial | Fully integrated |
| Continuous Power | 5–7 kW | 11.5 kW |
| Scalability | Up to 10 units | Up to 4 units (higher output per unit) |
| Outdoor Rated | Yes | Yes (improved cold-weather performance) |
| Backup Type | Partial or whole-home (limited) | True whole-home |
| Warranty | 10 years | 10 years |
| Inverter Efficiency | ~97% | ~98.5% |
Compact, powerful, and streamlined, the Powerwall 3 delivers more power, fewer components, and faster installation.
How Much Does the Tesla Powerwall 3 Cost?
Tesla Powerwall installation costs are high variable and depend on the unique details of your project. While every project includes hardware and labor expenses for the new equipment, individual Tesla Powerwall costs can decrease per unit with each additional battery installed. It’s important to note that the price of home batteries may be affected if bundled with other energy system purchases, such as new solar panels, an electric panel upgrade or the Tesla Universal Wall Connector . This new for 2024 charger will charge any EV (Tesla and non-Tesla), without adaptors, using the innovative “Magic Dock”.
Tesla Battery Incentives and Financing in Massachusetts
ConnectedSolutions Program
- Available to Eversource and National Grid customers.
- Earn $700 – $1,500+ per year by exporting stored power during peak-demand events.
Mass Save HEAT Loan
- 0% interest loan (up to $25,000) for qualified battery installations.
- Terms up to 7 years for eligible homeowners.
Local Utility Rebates
- Holyoke Gas & Electric, BELD, and other municipal utilities offer additional rebates or connected-device incentives.
Valley Solar handles all enrollment, documentation, and metering setup for ConnectedSolutions and Clean Peak programs.
Why Tesla Chose Valley Solar
Tesla Energy selected Valley Solar as its exclusive launch partner for the Powerwall 3 in Massachusetts, based on proven expertise and reputation.
- Proven Reputation: Over 1,300 installs across Western Massachusetts; 4.9-star Google rating and A+ BBB accreditation.
- Industry Leadership: More residential battery installs than any independent contractor in Massachusetts (Ohm Analytics, 2025).
- Certified Expertise: All work performed by in-house Tesla-certified electricians and designers — never subcontracted.
Quick Specs
| Specification | Powerwall 3 |
|---|---|
| Energy Capacity | 13.5 kWh |
| Continuous Power | 11.5 kW |
| Peak Power (10 sec) | 185 A (LRA) |
| Inverter Type | Integrated hybrid |
| Weight | 287 lb |
| Dimensions | 43.25” × 24” × 7.6” |
| Warranty | 10 years |
Contact Valley Solar for Your Powerwall 3 Installation
If you’re ready to take control of your home’s energy with a Tesla Powerwall 3 — for backup, savings, or total energy independence — Valley Solar can design and install your complete system.