Tesla Powerwall Storage Capacity: How Long Can a Tesla Powerwall Power a House? 

Storage capacity is one of the most important factors to consider when installing a solar battery. The more storage capacity your battery has, the more electricity it can store and the longer it will last during a power outage.

Tesla Powerwall batteries have an impressive storage capacity, which is a big part of why Tesla Powerwall is worth the cost

Keep reading to learn more about Tesla Powerwall battery capacity and what it means for you during an outage. 

How Much Electricity Does a Powerwall Hold? 

Just how much power does a Tesla Powerwall hold? A single Tesla Powerwall solar battery can hold 13.5 kWh of electricity! Powerwall batteries have one of the highest storage capacity ratings of any solar battery on the market—the industry average is about 10 kWh. 

How Long Does a Tesla Powerwall Last? 

Tesla Powerwall is designed to provide whole-home backup during a power outage. It can support standard, 120V loads including outlets, lights, refrigerators, and small appliances as well as larger 240V loads such as an air conditioner or EV charger

But that doesn’t necessarily mean that you’ll be able to run every appliance in your home continuously—doing so would drain your battery fast. Instead, your battery will backup essentials as you use them, and loads will be prioritized based on need. So, for example, your refrigerator will run continuously but power will only flow to your microwave or TV when you’re using it. 

Exactly what your system can back up and for how long depends on how many batteries you install and how much energy you consume. One fully-charged Powerwall will provide several hours of backup power for essentials like a refrigerator, WiFi router, and a few outlets. You can extend your battery life by managing your loads within the Tesla app and making sure nonessentials are turned off. 

How Many Tesla Powerwalls Do You Need? 

The number of batteries you need to back up your home depends on how much electricity you use and what you want to back up. If you want to power a few essentials like a refrigerator, some lights, and a few outlets, you will likely need just one Powerwall. For continuous, whole-home backup, you will need multiple Powerwall batteries. 

Element Electric installs custom, residential solar panel and battery solutions for homeowners in Dixon, Davis, Vacaville, and the surrounding areas. We will analyze your home’s power consumption and talk to you about your backup power expectations so we can recommend the right size storage system for your home. We specialize in solar battery installation and will make sure you get the backup power you need to stay safe and comfortable during a power outage! 

Tesla Power Certified Installers in California 

Element Electric is a certified Tesla Powerwall installer! Our technicians are specially trained to size and install Powerwall solar batteries and will ensure a smooth installation. If you’re looking for Tesla Powerwall installation in Sonoma County, Napa County, Yolo County, or Contra Costa County, we are the company to call.

Protect your home against power outages with Tesla Powerwall. Call 707-693-1651 or contact us for a free estimate!