> Maybe the answer is some sort of resonant system or waveform which "sloshes" energy from place to place instead of a hard on/off (yeah, related to AC). Most

> Maybe the answer is some sort of resonant system or waveform which "sloshes" energy from place to place instead of a hard on/off (yeah, related to AC). Most definitely not. You want to limit is as much as possible, as the reactive power (the "bounce back") still goes thru the resistance of the wire, generating losses. In fact big consumers often get charged when their power factor (the amount of energy "received" vs bounced back) is below a certain value.