You've got the circuit correct @blastfromdapast - the 5-amp switch could be under the limits but that depends on power supply and the final configuration. 60 watts is 12V at 5A. I can pull 80-90 watts on several caps if I give it the juice. Will the 5 amp switch work? sure - but if you are pulling more, it might fail at some point. Always nice to have a way to measure power input to know how the unit is operating.