classic33
Leg End Member
The law say that electric vehicles are treated different?Because that is what the law says.
It isn't anybody here arguing about the physics, or how it should be measured. It is about how the law defines it. Which, as often with laws, is not necessarily the same as the average man in the street (or physicist!) would define it.
Constant maximum output, as per the EPAC regulations is defined in the same regulations "as the power output allowed when in use". Not as you have tried to say over a thirty minute period.
As for testing, roadside dyno, as used in parts of Ireland. Question that result and you take it to a testing station, at your own expense, to prove it's legal.