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How long will a 4.8kWh battery last in a blackout?

Posted in Getting battery storage

Infographic: how long will a 4.8kWh battery last in a blackout

If the power goes out, because of extreme heat, fire or wild weather, there’s not usually much you can do about it. But if you’ve got a solar battery, you could keep the internet connected, the lights on and the fridge running thanks to blackout protection. 

Determining how long your battery will last in a blackout comes down to understanding a few factors:

  • The size of your battery – how much electricity can it store?
  • Do you have ‘whole of house’ or ‘emergency’ blackout protection? – Whole of house keeps the electricity flowing to the whole house, while emergency power supply keeps the electricity on to some (not all) electrical circuits in your home
  • How many and what appliances are running during the blackout?
  • The size and energy efficiency of those appliances
  • How much energy you’ve got left in your battery when the blackout hits

Assuming your battery was fully charged when a blackout hit, we’ve pulled together some likely scenarios. With a 4.8kWh battery system, you could power the TV, the fridge and freezer and your kitchen and living room lights for around 10 hours*.

Infographic: how long will a 4.8kWh battery last in a blackout


Blackout protection included at no extra cost 

If you’re getting a solar battery for security in a blackout, it’s important to be aware that not all batteries come with this feature. 

The DC Power Co Solar Battery Package is high-quality, affordable and comes with blackout protection included at no extra cost. 

Compatible with any existing solar system, you can set a ‘reserve capacity’ to make sure there’s always some energy reserved in your battery in case of a power outage, and at times of crisis you can set it to store 100% of the energy for an emergency. 

Find out more about the DC Power Co Solar Battery Package


Don’t have solar panels yet? Our solar and battery package is designed for people adding solar and a battery at the same time. It combines world leading solar panels, an Australian-designed battery system and local, experienced installers. Find out more here. 


*Assuming a 4 star, 50” TV, 2-2.5 star ~450-500L fridge/freezer, 10 LED lights

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