Comment was to long winded so figured I'd start a discussion. I'll start by saying I use a few mods but I don't see them being the issue as all other trailers work as intended. After playing with it a bit I came across a couple issues (with generator trailer). When it comes to regular batteries it appears you can only place batteries with some charge remaining in them into the generator and they don't appear to actually charge. Mechanics menu says ("battery 10%") when you have a battery installed into one of the slots. If you have a dead battery it does not give you the option to install. I let the trailer run overnight which leads to the next problem i ran into. Upon waking up i could not access the information screen or the mechanics screen. Generator was not making any sound but still had the option to turn it off which did not appear to do anything. I was still able to turn the spotlights on and off. Reloading the save fixed everything. Generator was off upon reloading and the battery was still there but no charge was gained. I have not tired charging car batteries yet.