I purchased the 4kw unit. Looks like the one posted but i ordered it with a Honda generator with auto choke /start. Love, love. love it. I was always worried if and when the power grid would fail. It did yesterday in 106 degree temperature. For 5 hours. It made me think about third world countrys with no power or water and what if it could happen to us. No one had power but my home, Lights, fans,and pumps. I ordered this unit for the reasons of having a off grid emergency power source. I looked at home solar and wind systems but if I sold the property the systems would stay. So I started thinking outside the box. what if I could build a system that could be hook up to your home and if you decide to go to the cabin or for you preppers out there your bug out places. A wind, solar, marine battery's, and generator, be portable and big enough to power to cover your power needs. All on a trailer to hook up too was a real winner. I found Black Sage. Talked to one of the owners told him what I wanted and he said they could build it. So i purchased it. I am glad I did. Outstanding product. Great company!