Ken Ward wrote:
On 14/11/2015 09:03, Chris J Dixon wrote:
Basil Jet wrote:

https://www.youtube.com/watch?v=sxScXvX1Dv4

I'm a little surprised that they claim it uses less power than a
conventional lift. If you have to raise a given mass through a
given vertical distance, shouldn't the answer be the same?


Some form of energy recovery on down cycle maybe?

Yes, as mentioned upthread, there's a big yellow counterweight visible in
the video. If the lift is lightly loaded, it'll use more energy going down
than up.