This the perfect solution to power my wife's oxygen generator over night. The battery can easily be recharged with the 120 v charger, but it does get very hot. The solar panels generate much less than advertised. They must be frequently reoriented to face the sun. But if there is no other power source this could be a life saver.
Purchased two 6000X units to act as a stacked "battery generator" in case of a power failure. Live in Michigan and we experience a couple of multi-day outages each year. System so far has been able to satisfy heat (hydronic), food storage, and lighting needs for a 3-4 day outage.
Recently we had a neighborhood half-day power outage. Our Yeti, the Tanks, and the Home Integration Kit worked like a charm powering all of our essential circuits, like freezers, refrigerators, and septic pumps.