Works well for me This is the second one I have bought from Revain no option to set up lithium batteries on the unit itself but with a bluetooth adapter or Wi-Fi adapter you can download android app and setup for lithium battery. I'm in Quartzsite, Arizona during the winter and by 10:30 or 11 I'm fully charged with my new panels and charge controller, so my new controller is helping me get through the winter.
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