Generac PWRcell is a grid tie with backup battery for production from 3 kwh to 11 kwh modular power with 9 kwh to 19.2 kwh per system with excellent company warranty. These systems are AC Couple. This $149.99 is a monthly payment base on credit score. Restrictions apply. For a Quotation call Mr. Jiménez at 939-438-5182 se habla español.