this is my ebike hill test. my gps said 22 ride by gps 18.9 I did this on my new trek with gen 4 bosch. I put out 450 watts too. I should've tested this hill with the 11-2 cassette not the 11-32 I put on for more regular riding.
even the ride up to it is 14 to 16% grades. got my heart upto 165 bpm. was only doing about 30 cadence. I should have tried it standing up too.