1977 dodge sportman

olbaby30 wrote:
so what can a 3000 watt inverter can run in this camper?

Unfortunately I have to answer your question with more questions.

How many batteries does your RV have?
Where are the batteries located?
Are they 6 volt or 12 volt. If not sure you can tell by looking at the water fill holes. 3 holes = 6 volt, 6 holes = 12 volts.

A 300 watt inverter will run a fan. Note that's 300 not 3,000. :)