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Questions Answered! Tesla Powerwall Battery System: What Is It & How Many kWh Does This Battery System Hold?

When talking to clients about solar power, we often mention how much Tesla stands apart from the competition in this industry. The Tesla Solar Roof has changed the game for homeowners, making solar power more affordable, approachable, and usable. 

One reason we are such big fans of Tesla is the Tesla Powerwall battery system. The Tesla Powerwall stores solar energy so you can power your home even when there’s no sunlight and even if the power grid goes down. But how many kWh does a Tesla Powerwall hold?

Keep reading for a more detailed overview of the Tesla Powerwall and everything we love about it.

The Tesla Powerwall: Defined

A solar system won’t do you as much good if you don’t have a way to store the electricity being produced by your solar array. In the world of Tesla, the Powerwall is the power storage solution. 

This is basically a massive battery. When your Tesla Solar Roof actively produces electricity, that electricity flows to the Powerwall. The Powerwall then stores the electricity for later use.

Your home will pull from the Powerwall’s energy supply whenever you turn on the lights, use an appliance, or otherwise use electricity in your home. Thanks to the Powerwall, you’ll have electricity whether or not your Tesla Solar Roof is actively producing power at that time. If it’s a cloudy day, for example, you’ll still have electricity “built up” in the Powerwall that you can utilize. The same is true at night when the sun is down.


Storage Capacity

Another awesome thing about the Tesla Powerwall is that it’s so easily scalable. A single Powerwall can store 13.5 kWh of electricity. To put that into perspective, according to the US Energy Information Administration, the average American home uses 10,632 kWh of electricity per year. That’s equivalent to about 29 kWh of electricity per day.

So, a single Tesla Powerwall holds not quite half of the electricity that the average American home uses daily. If you live in a sunny climate and your Tesla Solar Roof is almost always producing electricity, then a single 13.5 kWh Powerwall may be sufficient. But if you want more storage capacity, you always have the option of having two or three Powerwalls installed. Two Powerwalls would give you 27 kWh of storage capacity. Three would give you 40.5 kWh of storage capacity.

It is common for our customers to have two or three Powerwalls installed. However, you can install up to 10 as a part of your Tesla Solar Roof system.

Installing multiple Powerwalls does make it easier for you to go off-grid. With more electricity stored, you don’t really need a public electric connection as a backup. Plus, if the public power goes out, you won’t have to worry. You could potentially have several days’ worth of electricity stored. Most homeowners don’t even need a backup generator if they have an amply-sized Powerwall setup.

Other Powerwall Benefits

The Tesla Powerwall has several other benefits for homeowners. By allowing you to disconnect from the grid, it can help reduce your carbon footprint. Solar power is very clean, green energy, whereas public utility companies’ electricity is still produced by burning fossil fuels.

In the long run, installing a Tesla Powerwall can also help you save money. A Powerwall allows you to go fully solar, so you don’t have to pay a power bill anymore. After several years, the money you save on energy will cover the cost of a Tesla Solar Roof and Powerwall, and then every month’s energy savings will just be more money in your pocket.

Having a Tesla Powerwall also gives you peace of mind, which is priceless. You don’t have to worry about power outages or about starting a backup generator if the power does go out. You don’t have to worry about the sticker shock of a high electricity bill at the end of the month, either.

Other Powerwall Specs

Tesla has gone above and beyond to make the Powerwall useful and simple for customers. Powerwalls can be mounted to either your floor or a wall. In Florida, they can be installed either indoors or outdoors, as they are built to be dust and water-resistant. Tesla stands behind their 

Powerwalls with a 10-year warranty – and we can tell you from experience that these systems are as well-built and durable as all of Tesla’s other products.

If you are considering having a Tesla Solar Roof installed, we highly recommend installing a Tesla Powerwall alongside it. The Powerwall allows you to go off-grid, reduces your carbon footprint, and saves you money over time. Contact Kelly Roofing to learn more. We’re Tesla Certified Installers, and we’d love to help you add a Tesla Solar Roof and Powerwall to your Florida home.