Chris is Gibraltar If you wish to use a EU built boat in the USA you have the opposite problem that I am preparing for i.e. using a USA built boat in the EU. Chris in Gibraltar, We will be leaving Fort Lauderdale on May 16th and arriving in Gibraltar with the "Nordhavn Atlantic Rally 2004" boats on or about Saturday June 26th after stop overs in Bermuda and Azores. My suggestions for your 220 to 110 power system: 1.Verify from your equipment manuals that your 50 cycle equipment can run on 60 cycle - this is generally easier than running 60 cycles equipment on 50 cycle because the 50 cycle input makes the equipment run hotter. 2. Verify that your inverter and charger will function properly on 60 cycles (the same applies as above) 3. Note that electric clocks that depend on 50 cycles for their accuracy with run at 6/5's speed - ignore them 4. If the frequency is OK then you have to decide what you are going to do about the voltage. Some docks (maybe 1/3 of them on the Great Loop) offer 220 V 60 cycle power at some or most slips. This will tend to be at the slips that accommodate larger boats. You will need a custom cable adapter and careful verification of the grounding system to connect to these posts 5. For the other docks you will need a 110 to 220 V transformer. For our use in the EU we have a 4 KVA 230 to 115 V waterproof transformer that is readily available in many EU countries because it commonly required at large construction sites for all tools. We estimate that this will be enough to run boat dock side equipment and one air conditioner unit, if we are careful with power management. It weights about 40 pounds, and can sit on the deck or the dock i.e. outside. I don't know if you can use one of these in reverse as a step UP transformer, but you might inquire of the EU manufacturers. I don't know if your schedule allows a visit in Gibraltar but you would be welcome aboard from 24 hours after our arrival until at least July 3rd. Let me know by personal e-mail whether this might be of interest. I may be able to find some additional information on power if you have specific questions. Best Regards, John Harris Nordhavn 46 "World Odd-at-Sea" PS For those interested in such things the "NAR 04" trip can be followed during the time of transit at WWW.NORDHAVN.COM, go to the second screen and click on the blue and white "NAR 04" logo. Additional pictures and text will be available every day or two. There is already some information there.