When the power goes out on your street, a home battery is the difference between a dark, quiet house and one where the fridge is running, the Wi-Fi is on, and the sump pump is doing its job. The Tesla Powerwall 3 is the battery a lot of New Jersey homeowners ask us about first.
Here's what it is, what it costs in 2026, what it can realistically power, and who it makes sense for.
What the Powerwall 3 is
The Powerwall 3 is Tesla's current home battery. It hangs on a wall or sits on the floor, indoors or outside, and stores electricity so you can use it later, especially during a power outage.
The big change from older Powerwalls is that the Powerwall 3 has a solar inverter built in. An inverter is the box that turns the power from your solar panels into the kind of electricity your home uses. With Powerwall 3, the battery and that inverter are one unit, which can mean less equipment on your wall when you install solar and a battery together.
The specs, in plain English
Straight from Tesla's spec sheet:
- Storage: 13.5 kWh. That's how much energy it holds. For a sense of scale, the average New Jersey home uses about 22 kWh a day.
- Power: up to 11.5 kW at once (depending on how it's set up). That's how much it can deliver at the same moment, enough to run a lot of the house together.
- Starts big motors. It's built to handle the surge when things like a central air conditioner or a well pump kick on.
- Handles up to 20 kW of solar panels through its built-in inverter.
- Expandable. You can add expansion units, 13.5 kWh each, to store more.
- Built for weather. Rated for indoor or outdoor installation and temperatures from -4°F to 122°F.
- Warranty: 10 years, with Tesla promising it will still hold at least 70% of its original capacity at the 10-year mark for normal home use.
How long will it run my house?
It depends on what you ask it to power. Using the New Jersey average of about 22 kWh a day:
- Running the whole house normally: one Powerwall 3 lasts roughly 15 hours with no sun to recharge it.
- Running only the essentials (fridge, lights, Wi-Fi, a few outlets): often well over a day.
- With solar panels: the battery recharges from your panels whenever the sun is out, even while the grid is down. That can stretch backup over a multi-day outage.
Big loads shorten the clock fast. Central air, an electric dryer, or an electric range will drain a battery much quicker than lights and a refrigerator. That's why most battery designs choose between backing up the whole home or just a panel of essential circuits. We'll help you pick based on what you actually need to keep running.
One important point: a regular solar system without a battery shuts off during a blackout for safety reasons. If backup power is your goal, the battery is the piece that makes it happen. We explain why in do solar panels work during a power outage.
What does a Powerwall 3 cost in New Jersey?
Prices vary by installer and by house, but industry pricing in 2026 gives a useful ballpark:
- Quotes gathered from Tesla's own website in several U.S. markets have run about $15,300 to $16,200 for one Powerwall 3 before incentives.
- EnergySage reported a typical installed price of about $13,500 before incentives in May 2026.
So for one unit, plan on roughly $13,000 to $16,000+ installed. Things that move your number:
- How many units you want (more storage, more cost)
- Whether you're installing solar at the same time
- Whether your electrical panel or wiring needs work
- Whether your home can use Tesla's Backup Switch, a compact device that installs at your electric meter. Tesla lists PSE&G, JCP&L, and Atlantic City Electric among the utilities that allow it, which can simplify the installation.
We offer financing and leasing options for qualifying customers, so a battery doesn't have to be a single large payment.
Incentives in 2026: what's real right now
This is where a lot of online information is out of date, so here's the current picture.
Federal tax credit: gone for purchases. The 30% federal credit that homeowners used for batteries ended for systems installed after December 31, 2025. If you buy a Powerwall in 2026, there's no federal credit for it.
PSE&G GridSmart Battery Program. PSE&G announced this program in August 2026. It offers a $5,000 instant rebate plus up to $25,000 in interest-free repayment on your PSE&G bill for qualifying home batteries installed through participating contractors. Terms can change, and eligible equipment and contractors should be confirmed before you sign anything.
JCP&L customers: Tesla's Virtual Power Plant. Tesla runs a program with JCP&L that pays Powerwall owners for letting their battery help the grid during a limited number of high-demand events each year. Tesla lists payouts of up to about $360 a year per Powerwall 3. You choose how much of your battery to keep in reserve for your own backup. Learn more on our virtual power plant page and in our post on how Powerwall owners can get paid to support the grid.
A statewide battery program is coming, but isn't open. In August 2026, New Jersey's Board of Public Utilities proposed a program to pay homeowners with batteries over 10 years for helping the grid. It's still a proposal. There's nothing to sign up for yet, and the final amounts and dates aren't set.
Can I add a Powerwall 3 to the solar I already have?
In most cases, yes. Tesla allows the Powerwall 3 to be added to an existing solar system, within limits on how large that existing system can be. Your current panels keep working, and the battery stores their extra power for later. We cover the pros and cons in adding a battery to an existing solar system.
Is a Powerwall 3 worth it in New Jersey?
Let's be honest about what a battery does and doesn't do here.
It's not mainly a bill-saving device in NJ. New Jersey's net metering still credits the extra power your panels send to the grid at the full retail rate. That means your solar panels already do most of the money-saving work. A battery adds some savings on top, and programs like the ones above can add income, but it usually won't pay for itself on bill savings alone.
It's a resilience upgrade. The Powerwall 3 is worth it when keeping your power on matters to you. It tends to make the most sense if you:
- Work from home and can't afford to lose power or internet
- Rely on medical equipment, a well pump, or a sump pump
- Live in an area that loses power during storms
- Want quiet, automatic backup with no fuel and very little upkeep
- Are going solar anyway and want the battery and inverter in one unit
If none of those describe you, solar on its own may be the better starting point, with a battery added later.
Frequently asked questions
How much is a Tesla Powerwall 3 in NJ?Expect roughly $13,000 to $16,000 or more installed for one unit before incentives in 2026, depending on your home, how many units you need, and any electrical work.
How long does a Powerwall 3 last during an outage?About 15 hours for an average New Jersey home running normally, longer if you power only essentials, and longer still if solar panels recharge it during the day.
Is there a tax credit for Powerwall 3 in 2026?Not for homeowners who buy one. The federal residential credit ended for systems installed after December 31, 2025. PSE&G's GridSmart program and JCP&L's Tesla virtual power plant are the main NJ options right now.
Does Powerwall 3 work without solar panels?Yes. It can charge from the grid and provide backup during outages. With solar, it can also recharge during a multi-day outage.
What's the warranty on Powerwall 3?Ten years, with at least 70% of original capacity guaranteed at 10 years for normal home use.
Thinking about a Powerwall?
We install Tesla Powerwall battery systems across New Jersey, on their own or with solar. Request a free consultation and we'll look at what you need to keep running, what your utility offers, and whether a battery makes sense for your home.
