As the #1 selling home standby generator brand, Generac's EcoGen Series generators provide the automatic backup power you need to protect your home and family during a power outage. Generac's EcoGen Series 15kW backup generator provides home and business owners with an outstanding backup power solution. Whether the off-grid lifestyle is a choice or a necessity, you are responsible for producing the energy you consume even when theres no sun or wind. Ensure you never have dead batteries with the Generac EcoGenthe only automatic standby generator designed and warrantied specifically for off-grid use with an alternative energy system.