I got this one, link below. We have LED's and only run a couple at most. Also the pump and a movie on a 19 in lcd. That's about it. The TT is a 2012 and it will bring my batteries up from 11.7 (30%) in the mroning to 12.9 (90%) in about 1 hour (2 group 24 12v). We fire it up around 10am and this recharge is with no lights or any other draw. at 10am everyone is out of the TT and playing. At night I'll have to run it about 1.5 hours to get it back up due to trailer usage at night. I also the little voltage meter too so I dont over run the generator. You'll have to shut off the plug at the generater to test where your at voltage wise after an hour or so. I have it down to a routine. I just set my watch for 60 min in the am and 190 in the pm and it's always up to 12.9-13. just like clockwork. I don't even think about it anymore.
Champion GeneCheep Volt Meter