In theory, a home battery can power your home for extended periods when paired with solar panels, but it's optimistic to plan on more than 7 consecutive days. Solar panels power your home during the day and recharge the battery, and the battery powers your home at night. Without solar panels, the duration of power will vary depending on the size of your battery and how much energy you use. In general, we advise homeowners to size their system to provide at least 12 hours of backup power, but during storms or situations where solar energy production is hindered, the battery will not be able to recharge.