Iota Engineering DLS30 30 Amp RV Power Converter & Battery Charger - Perfect for RV, Marine, and Off-Grid Power Systems

I bought this from Amazon as a used model I think maybe it could have been warranty work or possibly a return it was professionally repackaged with all literature,,, it was wicked easy to set up I had an old pair of jumper cables lying around I cut a little out of that and used it for my cables,,, I crimped pins on the end to insert into the unit itself and then I simply put alligator clamps on the other end that way I can clamp it to battery bank,,,,or another bank quite easily,,,I used the little plug for bulk charging,,,as we've have alot of over cast,,,,rain,,,etc. didn't take long to top off my bank,,,I went ahead and mounted on the wall,,,my only concern is that when I bulk charge with plug inserted into the back that I don't overcharge my bank,,, others here have said there's a light on this for charging and when fully charged,,, I'll have to turn all the lights off in the house and see if I can see it I didn't notice anything like that,,,would this unit turn it's self off when bulk charging like that with the little plug inserted on the back?,,,,or will I have to keep an eye on it.I waited till it was at 14.1 volts and kept it pluged in for about 20 min. or so then unplugged it.don't know if I did this right or not and I have not tried regular charging w/o plug in back inserted,,,I thinking regular charging would be auto.?????if anyone knows more then I do please feel free to tell me all about it ..................::::::regards:::::::::::Bill R..............