Hello,
I've search google and BF about this but haven't found anything or relevant experience by someone.

I'd like to try training with powertap or something similar next winter in my basement. However I don't like my trainer. I much prefer doing rollers. I have cycleops roller with the resistance adapter and this works well for me.

Can I have an accurate wattage training using a roller and a powertap wheel ?

How would that compare to the powertap/trainer combination ?

thanks

Yes, the Powertap will accurately measure your power whether you're on the road, trainer or rollers.