We lived for 7 months in 2007 with an old (mid 1990s) 12V to 240V
inverter with 300W output. It ran the laptop on 240V as it would not fire up on the 12V plug (18V laptop
battery I think), and a video camera recharger.
Nowadays we have a bigger
inverter (2400W) as it runs an air conditioner for a few hours off the leisure batteries when needed (thats noisier than most generators!!). The
inverter will run anything I can plug into it from a satphone to a laptop to power tools.
I'd do some research on a generator versus larger leisure batteries (not car batteries) and an
inverter - inverters are now pretty cheap and pure sine wave ones are very common - maybe the only type now available (?).
You dont want a square wave
inverter or generator that outputs square wave to run transformers for laptops or other sensitive electronics.
There are plenty of past threads and discussions about sizing
solar panels, batteries and generators for your needs.
The one thing I've noticed with (generators and) motorhomes is that not many people stay put in one place for very long if the motorhome is the only means of transport to shops, pub, etc. You end up packing up the genny each time you move, which becomes a serious pain in the derriere after a few weeks. The driving around also recharges the leisure batteries pretty quickly and negates the need for a genny.
You can mount the genny permanently into a vehicle locker, BUT it has to be done with all the risks associated with carbon monoxide getting inside the motorhome. I doubt that Honda or Kipor would approve that type of fitment - you'd need to ask. Diesel gennys seem to be common on larger motorhomes for that reason.
You have all the other hassles of carrying fuel for the genny, extra cables, and often hostility from anyone nearby as they always make a noise (even the silent ones) or produce a "hum" frequency that gets annoying if you are not the recipient of the 240V power (jealousy?).