It's time to start working on that van conversion or vintage rv rehab. I have a 55amp power converter just what you need for your van or trailer conversion. It converts 110v to 12v. I got this for a lithium battery conversation on my 5th wheel. The converter is compatible with a lithium battery but will not charge the lithium battery fully in other words I bought the wrong converter. This converter will work with any lead acid battery be it a 12v set up or a 6v. I used it for a week trip and my very expensive lithium battery preformed no better than previous lead acid battery, so when we got back I removed this one and replaced it with one that was only for lithium. Was only used for one week. I am selling it for $80.00. It is new and sells on amazon for $133.00