This inverter from KRIGER is designed to do far more than simply charge batteries and electrical devices; however, it certainly has the power and outputs to handle those tasks very easily.
This is really designed as a built-in inverter, and it even has an installation kit on the body so you can mount it vertically on to a wall or on another solid feature. It includes a wired remote control, so you can turn it off without having to leave your caravan or tent.
As a device that throws out considerable power, it comes complete with the level of safety features you would expect. This includes built-in protection from temperature extremes, overloading, and short-circuiting.
This is a premium item, so expect to pay a premium price. But if you rely on access to a good level of power while out and about, this could be a very worthwhile investment.