From memory: with an arc of 100 amps: yield of 110% COP = 1.1
with an arc of 1000 amps efficiency of 140% COP = 1.4
Heat pumps can have a COP reaching 5 ... what's the point of its technology? If it is not to demonstrate that a 'certain' surunity is possible? You still have to see your outfit over time ....