Purchased 2 4500DF inverter generators. Had to send one back and Walmart immediately replaced. I had one question to ask regarding a charger and had to open a full case just for a question. They wanted serial numbers, proof of purchase, name, address, Phone, etc. Just to ask one question. What a joke after spending nearly $2,500.00 with them. I have never had this bad of service. Sending them back. User's recommendation: Would not do business with westinghouse again.