All good stuff but all I have done for years is to charge my batteries (2 in parallel) with jumper cables with a plug on one end. I have a receptacle on the exterior of the house. Depending on either ice or weather conditions, I charge off my truck, atv or snowmobile. Takes some fuel but beats lugging around a generator. I run a tv, dvr, lights and computer fans. I give the batteries a charge before I leave for the day. If I'm out for the day and running the tv and dvr I'll charge for 15 minutes or so every hour. Current batteries are about 5 years old and going strong. Have never had a problem with the truck, atv or sled equipment. Just seems like a simple solution to me.