Your 120v items will not work on 230v. If you can run off battery power just get a 230v RV converter (&battery charger) and plug in with a separate cord. Be sure to have the proper Schuko or other plug adapter as needed.
DLS 240-45 (220 VAC 12 VDC 45 Amps) $265You could run 120v stuff from the batteries and an inverter. You may need extra batteries for a large inverter. Air conditioner is pretty much no go.
Also consider about 200 watts of solar to keep the battery charged if power proves unreliable or you are between outlets for a couple days.
http://electricaloutlet.org/You may also want to figure out propane refill connections. Maybe a non-issue.
