Tesla Powerwall 2 – 2021 Buyers Guide
Last Updated: Feb 19, 2025The Tesla Powerwall 2 is a rechargeable lithium-ion battery to power your home during peak times, outages, and at night. The Powerwall can recharge from solar or by the grid during off-peak hours to reduce costs. During power outages, solar panels will continue to charge the Powerwall and the house. Before options like this, you'd have to rely on large, expensive battery banks, and additional energy would be wasted or sent back to the grid if that was an option in your area.
Key Powerwall 2 Benefits
- Power your home with solar energy any time of the day
- Reduce your power bills by charging during off-peak times
- Save extra power for your home
- Can be installed and used indoor or outdoor
- Backup your home by keeping lights, refrigerator, and Wi-Fi running during outages
Table of Contents
- How Do Solar Panels Work with the Tesla Powerwall 2?
- How Much Is A Tesla Powerwall?
- How Long Is the Tesla Powerwall 2 Warranty?
- How Long Does a Tesla Powerwall Last Without Solar Panels?
- What Can You Do with the Tesla Powerwall App?
- What Are the Specifications of a Tesla Powerwall 2?
- What Does a Tesla Powerwall Owner Have to Say About It?
- Check out this rundown from Tesla
How Do Solar Panels Work with the Tesla Powerwall 2?
Solar panels absorb photons (sunlight) in a rooftop installation to create DC electricity. DC cannot be used in the home and has to be converted to AC electricity with an inverter. The produced energy can be used to power your house, fed back into the grid (if applicable), or stored using your Tesla Powerwall. You can manage all of this using a cloud-based app. Tesla's Powerwall 2 offers one of the best ratios for energy storage in the US. One Powerwall 2 stores 13.5 kWh, basically enough to run your major appliances for a total of 24 hours. It also comes with the inverter mentioned above.
How Much Is A Tesla Powerwall?
The Tesla Powerwall has a US MSRP of $9,250. Supporting hardware for installation costs $1,550, and the estimated installation cost is $1,300 to $3,900, which is dependent on available professionals in your area. We also suggest keeping an eye out for energy rebates in your area that may help you reduce costs.
How Long Is the Tesla Powerwall 2 Warranty?
The Tesla Powerwall 2 comes with a 10-year warranty.
How Long Does a Tesla Powerwall Last Without Solar Panels?
Based on the average home consuming 28 kWh/day, one Powerwall will be able to power a home for 12 hours. Two Powerwall's will power a home for 18 hours, and three Powerwall's will run a home for 24 hours.
What Can You Do with the Tesla Powerwall App?
The Tesla app allows you to monitor and control your Powerwall remotely on iOS and Android. The app will enable you to see how much energy is stored from solar, current power consumption, and the amount of energy your home is exporting back to the grid.
What Are the Specifications of a Tesla Powerwall 2?
As efficient as it is stylish, the Powerwall is entirely automated, low profile, and requires no maintenance. The Tesla Powerwall 2 has double the storage capacity of the Tesla Powerwall 1, coming in at 13.5kWh. Additional Tesla Powerwall 2's can be added to increase total storage capacity.
- 7kW peak / 5kW continuous
- Floor or wall-mounted rechargeable lithium-ion battery with liquid thermal control
- Dimensions: 45.3" x 29.6" x 5.75"
- Weight: 114kg
- Recommending Operating Temperature: -4°F to 122°F / -20°C to 50°C
- Scale up to 10 Powerwall's
- Sleek, wall-mounted design installed indoors or out
- 10-year manufacturer's warranty
- Cloud-based web and mobile control and monitoring
For information on Tesla Powerwall 2 alternatives, check out this extensive list or read our 6 Best Battery Power Options (with Prices)
EV Chargers
Shop EV chargers for your home to make the most of your electric vehicle. For more information on EV chargers, start your research here.
Emporia Level 2 48 AMP EV Charger UL Listed
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What Does a Tesla Powerwall Owner Have to Say About It?
Nick Pfitzner was the first owner of a Tesla Powerwall in Australia. The original Powerall has a 7 kWh storage capacity. He says he has eliminated 90% of his power bill and that his family has become "smarter" while using their appliances.
I have absolutely no regrets
Mr. Pfitzner told 702 ABC Sydney. He cautions that the cost of the system is still high and may not pay for itself by the time the warranty runs out at ten years, although close. Pfitzner spent $16,000 installing solar panels and their home battery system, the first version of the Powerwall, holding 7 kWh.
He says that his panels power the house on a sunny day and have the battery charged by 11 am. At that point, if solar power is abundant, the excess is fed back into the grid. Pfitzner dreams of enhancing the Powerwall system that can predict cloudy weather and charge the battery ahead of time with off-peak pricing.
Check out this rundown from Tesla
Rise
At Rise, we strive to make sustainable home improvement easy and accessible for everyone. Whether you're building or renovating, our thoroughly vetted building products will help you reduce your carbon footprint, lower energy costs, and create a more sustainable living or working environment.
