Depending on how much power you want (joined this thread late) you could just use a standard inverter and a power pack. A power pack will produce a 12V or 24V DC source for you and an inverter designed to supply 220V 50Hz from a car battery can be made to take it's DC input from that instead. A quick web search for "inverter" "50Hz" throws up 210V, 220V, 230V and 240V inverters pretty easily. Then you can work out the power source, car batteries, power pack, DC power rails or some combination. (Australia is 240V 50Hz on the east coast, and I think it's still 250V 50Hz on the west coast, it used to be 260V and in some sites [eg, BankWest tower upper floors on weekends, ie, where the microwave gear for the academic network is located] I've seen up to 270V.) David, hoping all his equipment which claims to be 110V-240V supports the US voltages and frequencies next week :-)) -- David Luyer Phone: +61 3 9674 7525 Engineering Projects Manager P A C I F I C Fax: +61 3 9699 8693 Pacific Internet (Australia) I N T E R N E T Mobile: +61 4 1111 2983 http://www.pacific.net.au/ NASDAQ: PCNTF