The pump can be run safely on anything from 12-24V. We also sell the factory power supply for pretty much the same as you can find them at electronics stores, in town they range from $40-$70 and the factory one with 12,18 and 24V settings is about $57. The wattage and amperage of that power supply is actually slightly higher than our power supply so there is no issue there. Ours is 50W.