How much power am I contributing?

[Deleted member 4366]

Thanks for that detailed explanation. I'm sure Chris.mitu will find it useful.
Personally I've never used Sports Tracker so know nothing about it. Does it enable you to input the combined weight of bike and rider into the app before starting ?

Yes, sort of. It uses an estimated weight for a MTB or road bike, then you add your own weight, so you can add an additional say 6 or 7 kg to your weight for the electric stuff. Try it. It's free.