I haven’t really had an opportunity to use the Battery yet as it arrived a couple of days after I left for a 2 week trip to Europe, I was going to use it with my Delta 2 in an attempt to run my Motorhome for a couple of days, but will have to try that experiment at a later date. What I did find out from Ecoflow though is that if you have an extra battery with your Delta 2 you can not use the Alternator Charger to charge both batteries at the same time, as the Alternator Charger plugs into the Delta 2’s extra Battery Port (disappointing), however I am informed by Ecoflow that they are looking at another charging cable that will run from the Alternator Charger into the Solar Input Socket (I’m assuming at a lower wattage 500w/hr?). I'm not an electrician so please don't take anything above as gospel.