VW Bay Window 1978 cord/converter

Many thanks!

300 Watts seems a little low.. Figure out the total wattage required to run everything in the rv and add a little extra buffer.

The receptacle on your rv is a recessed 120v polarized grounded receptacle. Uses a standard US 120v extension cord.

Had a similar problem many years ago. I bought a 3000 watt 220-240 volt to 110-120 volt transformer. I mounted it in the camper and converted the US receptacle to euro. std. Don't remember the type.
C of F, That was a long time ago and I have forgotten. I do remember the Mark was .25 USD

This way you will be German on the outside, US on the inside.

Mine was a cheap, temporary solution. easy to convert back.

this will work
https://www.110220volts.com/500-watt.html
probably need to build a case for it.
As for the cord any good 12 gauge outdoor cord will do
https://www.amazon.com/Iron-Forge-Cable-Extension-Grounded/dp/B019P9ZGGO/ref=sr_1_3?s=lamps-light&ie=UTF8&qid=1473946542&sr=1-3&refinements=p_n_feature_keywords_browse-bin%3A4459667011

yes, the camper is 120v US and needs to be run in Germany with 220v.

what do you have 120 volt in the camper?
Fridge, tv, etc

to be honest I do not know exactly, somebody told me 300w

what wattage converter do you need?

http://show.picr.de/26823826cg.jpeg.html