The adapters that you need are available at any RV dealer. I suspect that your unit has a 50 amp service, or maybe a 30 amp. You can by a 50 to 30 and a 30 to 20 amp adapter to plug into any normal household outlet. You will not be able to run many of the systems with this, but you will be able to operate the lights and get the battery charged. If you were to attempt to run the air conditioner you will probably pop the circuit breaker. In our case we had a 30 amp outlet installed near where we park. I can plug in and run most systems in the coach. I keep it plugged in 90% of the time when parked here at home. It allows me to run all systems (not necessarily at the same time) and keeps the house batteries fully charged. We are fortunate that we can park it here at home without hassle. As we live in sow country, it also serves as emergency housing if the power show go out.
Tom and Barb
'07 Winnebago Voyage 35L
Workhorse W22 chassis FMCA 219315