How does Tesla Powerwall work?

Powerwall reduces your reliance on the grid by storing your solar energy for use when the sun isn’t shining. Use Powerwall alone or combine it with other Tesla products to save money, reduce your carbon footprint and prepare your home for power outages. With the Tesla app, you can monitor your home’s energy production and consumption in real time.

What is a Powerwall battery & how does it work?

Powerwall is a battery that stores energy, detects outages and automatically becomes your home's energy source when the grid goes down. Unlike generators, Powerwall keeps your lights on and phones charged without upkeep, fuel or noise. Pair with solar and recharge with sunlight to keep your appliances running for days.

Does the Powerwall really work?

The Powerwall also has a feature called StormWatch that claims to prioritize charging the battery in anticipation of significant weather events (just in case you need backup power). Reviews are mixed. Some owners claim it works no problem, others claim it never works, or only works intermittently.

How much does a Powerwall cost?

The Powerwall just costs less than almost all of them. On the EnergySage Marketplace, the typical quoted all-in cost of installation for a single Powerwall with everything included (battery, inverter, backup switch and load manager, permitting, and labor) is about $1,065 per kWh of capacity so far in 2024.

How much power does the Powerwall 3 provide?

The Powerwall 3 provides 11.5 kW of continuous power, which is more than double what it used to be, and much higher than many other batteries on the market. Continuous power refers to how much power the battery can manage at any given time.

How many Powerwall 3 units can you put together?

According to Tesla, you can string together up to four Powerwall 3 units in a series, which is enough power to keep most homes running for a couple of days, even without solar power refilling the system. That said, some other brands do still offer more flexibility for making your system size larger, now or in the future.