Yes the source is a 1600V 3300uF capacitor bank. So thats just over 4000Joules of energy. The energy stored in inductor depends on it's inductance and the aplied potential. So there shoudn't be any more energy delivered to the transient supressor than the inductor can store. If I knew the inductance I could easily calculate the max energy. But I have no way of measuring the inductance of my coils, that are just a flat #8 AWG wire with very few turns. However thats only for inductrion luncher, I have no info yet on any other coils I am going to use.