FWIW, make sure those are power meter KJ and not calories.
If those are KJ per hour, time to sign up for some stuff. As 900 KJ an hour outdoors is around 250w average power per hour. I say outdoors because outdoors you're not going to be putting out 250w nonstop. Some will be less for downhill and other stuff, some more. So you'd be averaging perhaps up to 275 to 300w for all the time you're making up for going less in an hour to make up the difference.
I find the calorie estimates to be dubious. I go strictly by KJ.