Battery bank or generator? How to choose best backup power for home during outage

With extreme weather events causing more frequent and longer-lasting power outages, consumers are increasingly seeking reliable backup power solutions for their homes. The market offers a range of options, from portable battery banks to traditional generators and whole-house systems, each with its own advantages and limitations.

For those needing to power essential small devices like cellphones and laptops for short durations, portable battery banks are a practical and often affordable choice. These devices, some no larger than a smartphone, can recharge devices multiple times and typically cost under $100. Larger, more powerful versions are available for a few hundred dollars and can accommodate multiple items, but they are generally not sufficient for major appliances like air conditioners or dishwashers.

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If you’re deciding between different backup power options for what you need, different conditions are going to require different elements, like a heat wave versus a hurricane.

Traditional portable generators, fueled by gasoline, diesel, or propane, offer more power and can run appliances such as refrigerators, window air conditioning units, and televisions. However, these generators must be operated outdoors due to the emission of harmful carbon monoxide gas. Their price can range from several hundred to over a thousand dollars, and users must also factor in ongoing fuel and maintenance costs.

Experts emphasize that the choice of backup power depends heavily on individual needs and the expected duration of outages. Noah Kittner, an associate professor at the University of North Carolina, notes that different conditions, like heat waves versus hurricanes, may necessitate different backup strategies. Mark Dyson, a managing director at energy nonprofit RMI, highlights that the standard fuel tank capacities of conventional generators may no longer be adequate for the multiday outages becoming more common due to extreme weather, requiring significant fuel storage.

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The standard designs for fuel tank capacity are no longer sufficient to deal with multiday outages, which we’re increasingly seeing due to extreme weather.