harry wrote:

Andy Burns wrote:

Seems to be a scroll-compressor run in reverse, they also sell UPSes,
which are based on an air reservoir also driving a scroll-compressor in
reverse.

I have never heard of an ICE scroll engine. It has to be something
super quiet.

Certainly other examples on U-bend aren't quiet.

There economics page is here.
http://www.genlec.com/homeowner/feed-in-tariff.html

The technology overview is here
http://www.genlec.com/products/Technology.html

Reckons to save £555/year

It'll be a marketing bollox number, so hardly worth mentioning.