An off-grid system is designed for the power needs of mid- to large-size homes. Unlike grid-tied solar systems, off-grid systems have no connection to the utility grid, and must make all the electricity necessary to power your home.
Off-grid solar systems operate from the stored energy in a battery bank. Solar panels generate power to charge the battery bank. Your off-grid solar system must be sized properly to meet your daily power needs and replace the stored energy pulled from the battery bank.