I've got the Ryobi 18V version of this edger … never knew hey offered a 24V version until now. It could definitely be more powerful but if I go slow it works acceptable for me and can get all my edging done on 2 4Ah batteries.
Tried out one of the Ryobi Xpand-It Edger attachments (my brother has one) with my attachment capable 40V Greenworks Brushless String Trimmer head, and now appreciate the 18V Ryobi even more.
The blade turns the opposite direction on the Xpand-It throwing the cuttings back at you instead of forward and away from you like the 18V Ryobi. They have a mud flap to block the debris, but that drags on the ground and is irritating.
Also you would assume the 40V Greenworks would have felt more powerful, but that was not the case … probably due to the fact that this Xpand-It attachment was originally designed for a gas powered head with more torque. It likely had a little more power compared to the 18V Ryobi, but was more difficult / awkward to use which I think is mostly due to the rotating direction of the blade that just seems to work sooooo much better.
I don't own any 40V Ryobi, but I agree that they should come out with a 40V version of this edger, that would be much better than 18 or 24V.
Doug