Currently have the Delta Pro Ultra with 3 batteries, Delta 2, Delta 2 max and an extra battery. DPU is wired to my house and has been a life saver for power outages. Will be adding more solar eventually but currently have enough to get me through outages. The Delta 2 and the Delta 2 max are mainly used for my bbq setup for Sunday football games. Love the Ecoflow products and will be a customer for life!