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I would like to ask why its possible that this work.

www.everwatt.myffi.biz/en/

And as I found out it does work but I can't tell why. exsept what they say at the company homepage.

Do any here have a good answear at this, I mean the company says so and so and the papers say the same +++ a lot of info on how it works and why it is possible and there is video also explaining by animation how and why.

My big Q is do any here have a more good story to tell on how its possible?

Documents for tests and so on can befound here

Dave