I have about a 7 Kw LP Kohler Backup Generator as part of my solar electric system at my off-grid cabin in Michigan's Upper Peninsula. I use it to condition my batteries, and during late grouse season and deer season when there's little sun it runs to charge the batteries about once every other day for two hours. Just sits there from the end of November to the 1st of May when I can't get in due to snow. I had it installed about 2010. Change the oil and filter each spring, and the battery once every 3-4 years. Never had a problem with it.
