How Long Does a Tesla Powerwall Last? A Comprehensive Guide

how long does a tesla powerwall last

The capacity of a car battery storage depends on how you use them. So, how long does a Tesla Powerwall last? Continue reading to find out.

You can calculate the capacity of your Tesla Powerwall by analyzing how long it lasts you per single recharge. This also depends on the maximum wattage and capacity of your battery.

For instance, it’ll have a capacity of about four hours if you own a 13.5 Kilowatt-Hours Tesla Powerful and are using it to operate 3250W devices.

With these certain aspects in mind, let’s dive in.

How Long Does a Tesla Powerwall Last Ideally?

Car Taking Power From Tesla Powerwall

In this section, we’re going to talk about two aspects relating to powerful solar energy batteries: Their lifespan and their capacity per single charge.

The lifespan of a Tesla Powerwall

Ideally, these batteries have a lifespan of around 20 years. However, the actual shelf life of any electrical appliance varies greatly depending on a few factors. These range from how much power you’re using daily and how often you’re using it.

User reports suggest that many owners have been able to stretch the shelf life of Tesla Powerwall batteries to 25-26 years without facing any major issues. Therefore, it strongly depends on how you’re using your battery and whether or not you’re maintaining it.

Conversely, the lifespan of your battery will be less than 20 years if you don’t maintain it. Using an undersized system also leads to draining the battery even more, diminishing its shelf life.

Here’s our guide on How To Clean Solar Panels On the Roof. Check it out.

Capacity Per Single Charge

The capacity of a battery per single charge depends on what you’re using the Tesla Powerwall for.

We don’t advise using these batteries to power home appliances that require a large amount of power, like air conditioning systems.

On the contrary, it can easily last you around 13.5 hours on a single charge if you’re using it to power around eleven 100W light bulbs.

Therefore, you must calculate how much power you require to know exactly how long a Tesla Powerwall lasts. Let us help you out.

Tesla Powerwall Capacity Based on Usage and Devices

In this section, we’ll take into account certain home appliances and find out how long your Tesla Powerwall should last based on energy usage and the powered device.

Your Tesla Powerwall can easily last for about 2,250 hours if it’s powering one 6W Wi-Fi router individually. Similarly, 540 hours for one 25 W smartphone charger, 135 hours for five 20 W bulbs, 67.5 hours of power for one 200 W home fridge, 45 hours for one 300W Smart TV, and 4 hours power for one 3500 heat pump.

Therefore, the maximum duration and original capacity of your Tesla Powerwall greatly varies depending on what you’re using it to power. At the same time, you can efficiently raise the duration and capacity of your power output by stacking more Powerwall batteries in the grid.

How Long Does a Tesla Powerwall Last for Your House?

Generally, the per day energy consumption for an average household is about 25 kWh. It can be as high as 40 kWh for a large household and as low as 10 kWh for a small household. So, one Tesla Powerwall will last a different amount of time for each type of household. So, take the charging duration of the battery and the power your home appliances require into account to know how long your Tesla Powerwall will last.

What we suggest is to figure out the home appliances you’ll require in case there’s a power cut or possibly a blackout scenario. Depending on that, you can find out exactly what appliances you need the Powerwall to power and how long it’ll last.

It can easily power appliances like lights, refrigerators, phones, and Wi-Fi for up to 24 hours without a stretch. At the same time, the backup power and hours will significantly reduce if you were to power an air conditioner, TV, or other high energy-consuming appliances as well.

One Tesla Powerwall will typically last you about 12-15 hours on average. But that’s assuming yours is an average power-consuming household with 750-1000 W power requirement during the whole blackout process and 2 kW during the blackout.

How Much Power Do You Require from Your Tesla Powerwall?

Electric car being recharge

The maximum energy capacity of your battery is about 13.5 kWh. It comes fitted with three types of operation modes. These are Time-Based, Backup Only, and Solar Self-Consumption Control Modes. Moreover, it offers you a constant power output with a maximum battery capacity of over 9.6 kW.

Therefore, depending on these figures, you need to calculate the power requirements of your house. Furthermore, that will help you know how long the Tesla Powerwall will be able to support your power requirements.

Calculating Your Home Power Needs

Calculating the total power needed in your home will help you figure out how long a single charge of Tesla Powerwall will last you.

In case you didn’t know, Kilowatts (or kW in short) are measured by this formula.

kW = (voltage x amps) / 1000

This is specifically done to make the units of your home appliances and that of the Tesla Powerwall, which makes calculations much simpler.

Once you figure out the exact number, you’ll know exactly how long a Tesla Powerwall will last.

You can even stack a maximum of six Tesla Powerwall batteries together at once to increase the power output, which will help you run appliances that a single Powerwall isn’t capable of. Moreover, a single Powerful has a power output of about 21 amps.

Take into account the following factors to find out whether or not you require more than one Powerwall:

  • Grid Outages: If you’re using one, make sure to account for the devices you’re powering with the Powerwall.
  • The maximum power you wish to store using the Powerwall.
  • The maximum power you require daily.

These factors will help you figure out how much power you require out of your Powerwall and how many of these batteries you need.

Keep in mind that Tesla doesn’t sell Powerwall batteries individually. You’ll have to purchase the Tesla solar power panel system or solar installations for the roof. These aspects raise the total price of the batteries, so we recommend taking these things into account when buying the Tesla Powerwall.

At the same time, you can approach a Tesla-certificate solar installer and check whether they offer standalone Powerwall batteries. If so, you can get individual batteries from them without needing to install the entire solar panel system.


How long will my Tesla Powerwall last?

How long your Tesla Powerwall will last depends on what you’re using it for. It can easily last you for days if you’re simply using it to power home appliances like Wi-Fi routers or light bulbs. On the contrary, it will last you just 4-5 hours if the Powerwall is powering high energy-consuming appliances like refrigerators.

How many Tesla Powerwall batteries should I get?

The number of Tesla Powerwall batteries you should get depends on your continuous power requirements and the energy-intensive nature of your electrical appliances.

If you’re hoping to power only the outlets, lights, and emergency circuits, one Tesla Powerwall will suffice. On the contrary, we advise getting about three Tesla Powerwall batteries and stacking them together to power appliances requiring a high amount of power.

Moreover, don’t forget to study our article on How To Calculate How Many Solar Panels To Power A House.

Is it worth it to get a Tesla Powerwall?

It may not make much sense to get this battery in the short term, but its long-term benefits are many. Surely, getting one of these batteries isn’t a simple task – they do cost quite a bit. But you won’t be incurring charges once you’ve installed these solar batteries into your electrical grid. Therefore, you’ll be able to save quite a significant amount of money in the long term, which makes getting this battery worth it.

Closing Thoughts

We hope we’ve helped you figure out how long a Tesla Powerwall lasts for your home. These batteries are among the best ways to store backup power. They are versatile and can be used to power the majority of home appliances with ease.

You can also monitor and analyze your usage by making use of the Tesla mobile app. It comes with many user-friendly features and customizations based on your power usage and requirements. One such feature is the Maximizing Protection feature which comes extremely in handy during power cuts.

Lastly, if you’re curious about power units, read our blog on What Does Ah Mean On A Battery.


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