Just over half an hour without external energy input. Ny Teknik assisted recently in a test where the ‘E-cat’ invented by Andrea Rossi was run in self-sustained mode.
At the new test, the E-cat was first run for 90 minutes assisted with a thermal electric power input of 2.6 kilowatts. The electric power was then cut off and the E-cat continued to operate for 35 minutes without external energy input.