X2 on Progressive Dynamics. Maybe order the 9200 series that has the 5 cent charge controller chip built in. 9200's have a $10.00 override switch monitor add on if you care what it's doing.
Bought the Progressive works great .Love the 3 step charging process. In the float mode it charges at .05 amps which I measured. The tech at the manf. couldn't answer that question.