I bought the P5000 kit & used 1 time as the power was outages; it is more quiet than the gas generator; I used for lamp, fridge, freezer, & phone charger without any problems. It provided enough power to use for my appliances for overnight; but I don’t know how many days that is out of battery; so, so far so good & will update it more later. Customer services is fast to respond to all my concerns. Thanks