EYE IZ LOZT.
It doesn’t produce electricity, it produces heat.
400 watts constant input to produce (and here’s the ? part) 15000 (potential/maximum/then it blows up) watts of HEAT.
I didn’t know heat was measured in watts.
Energy is measured in watts, joules, and many other units of measurement. Most power plants work by generating heat (whether by nuke, coal, or whatever), using that heat to boil water into steam which then turns a turbine which drives a generator.
If this thing can generate enough heat to create steam, then it can create electricity. If the output water temp is limited, it can still be used to heat buildings in the winter.