I think I was recently quoted a price for a box that would do this.. I was actually trying to convert 220/60hz single phase to 220/60/3-phase .. the ¡°box¡± was essentially a VFD (I think) with variable output for voltage, frequency, and phase.
I was looking to drive a large table saw, so was pricing units rated for 7kW at 220v - the price FOB from china to USA was <$500. ?I would guess half that for the size you need. ?I found the supplier thru .
I did not implement the solution, though, so cannot guarantee that this would work for you, but might be worth looking into. ?Theoretically, will also act as a surge suppressor (although it might do so by falling on its sword)
-Rob
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Ok, a couple of thoughts. It seems easier to use a transformer for your needs than to reconvert the entire boat. And more cost effective. One avenue is to have an AC to AC converter and run with the different frequency. I would think over time this method may cause interesting problems that will cost more down the line to correct. The other option is to convert everything to DC then use inverters to convert to the power you need(you already have the inverter for the house). You could find a 240 50hz battery charger for your house bank then find the inverter you need to power house and another inverter to power the washer. This way would require more parts (3) but "portable in nature". Now you can adapt to your surroundings as the need arises. If one of those parts fails, replace as needed. Move to another country, now you only need to change one part, the battery charger. Your ONAN already runs the house. Each country you visit will most likely have a battery charger to fit your needs. This method requires much fewer parts than converting to the 50 hz for the entire house.?
On July 14, 2018 at 7:19 PM "milan via Groups.Io" <milanvotrubec@...> wrote:
Hi Simon,
By now I'm quite overwhelmed by all the great responses. ?Thankyou. I'm on the Gold Coast. I'm a little concerned about changing the boat over to 240v even though i know the onan can be changed.... I'm just wary of the can of worms that may be opened. If you can put my mind at ease after doing it yourself that may help. It would obviously be desirable to have it all on 240v.
The AC units are definitely 115v 60Hz Cruiseairs with Dometic motors. Not sure if maybe just the motors may need changing?? Perhaps someone may be able to advise here? And the water heater element sticker clearly states 110v. I'm guessing that changing a hot water element would note be a big issue.?
Definitely concur with your solar thoughts as well as a Rainman high output water maker.?
--
-Rob H
Pacific NW, USA
No sailing vessel at the moment
