A new group of portable home batteries is trying to bring backup power to households that cannot justify a permanently installed whole-home system.
Fast Company tested the Pila Mesh Home Battery, BioLite Backup Core and EcoFlow Delta 3 Max Plus. Each plugs into a wall rather than requiring an electrician, making the category usable by renters as well as homeowners.
The test focused on outages and electricity costs
The publication connected the batteries to a refrigerator and simulated grid failures. It also examined energy arbitrage, in which a battery charges when electricity is cheaper and powers appliances during more expensive periods.
That second use matters because a battery can provide value even when the grid stays on. Whether it actually lowers a household's bill depends on local utility rates, time-of-use pricing, battery losses and how often the stored energy is cycled.
Portable systems trade reach for simplicity
The products are meant to keep essential devices running rather than power every circuit in a house. Refrigeration, internet equipment and a few electronics are a more realistic load than central air conditioning or an entire electric home.
Portable batteries avoid the installation cost of systems that can exceed $10,000 before electrical-panel work, but their smaller capacity limits outage duration and the number of appliances they can support. Buyers need to compare usable watt-hours, continuous output, surge capacity and warranty terms against the loads they actually plan to run. Fast Company's test establishes the category's easier setup and practical use case, not a universal savings guarantee.
Technology