Shop expansion batteries for increasing runtime and storage capacity on compatible power stations and energy systems. Expansion batteries are useful when a standard power station does not provide enough capacity for longer outages, larger appliances or extended off-grid use. Compare compatibility, usable capacity, charging behavior and supported system models before adding extra storage. Use this collection to compare equipment by size, compatibility, voltage, capacity, output and system fit before building or expanding your power setup. Use this page to compare compatibility, system size, voltage, capacity, output rating and supporting accessories before choosing the right equipment.