I cant help you with wattage but it will pull about 25-30 amps when it starts and drop back to about 7-9 amps.
That info is close for a 1/2 and 3/4 H.P. pump. A 1 H.P. will be a little higher.
Hopefully you can use amps to convert to wattage?
I have our 10K generator running our pump when we loose electric power, it is a deep water submersible 220.
I take no chances with my water supply in the back woods.
The 10K electric start Generator runs the entire Log settlement, including safety lighting/security system, kennels and Pivilions. Always bring enough Power & Gun.
Up here my well is 120' deep and I have a 1 hp pump that is 220V - a buddy was the electrical engineer for the project - and he used an online calculator to establish just how much power it would require to run the pump - cause my well is 1200 ft from the house (we don't have water tables up here - you have to hit the water vein to get any water) anyways we had to use 6 ga wire - that was not a cheap date!! that was the reason for a 1 hp pump because of the long run back to the house..FYI