Hi and
to the forum.
You are not going to achieve 35mph going up any reasonable hill with a 1,000W motor, never mind 45mph.
I haven't done the maths, but I suspect that you would probably need at least 5,000W of power to climb a 5% gradient at 45mph.
Therefore, I feel that your goal is unrealistic for a 1000W mid-drive setup, but it might be achievable with a 5,000W direct drive hubmotor
(the exact power requirement will vary considerably, dependant upon the steepness of the hill).
Alan
