You can change the power supply but be aware that if you don't buy it from Tunze SA your warranty will be through Germany only, you will incur all the shipping expenses in case something does go wrong and add to that you will have to buy the 230V power supply which will run $72 in addition to buying the pump with US power supply. Tunze SA (AquaAfrika) would have no obligation to honor the warranty claims on something they did not sell since there labor or shipping expenses are not compensated by Tunze, they rely on the profits from the sale to make the money to cover such expenses. I know the prices are higher in SA but the tariff rates are the cause of that. Buying the pump through the proper distribution channels is really in your best interest in the long run.