Had a reply to my email from Hildebrand & Glow support who currently maintain the EnergyHive / Engage server and here is what they said
“We have not heard from the efergy team in a very long time and no idea what is happening.
As you know we do power their dashboard. Are you aware that we retired our energyhive service around seven years ago? We try to keep it going but can’t promise anything.
My colleague did fix something that was affecting data storage recently on energyhive - hopefully this has addressed the point you raised. FYI, you could use your efergy credentials to login to energyhive.”
So it seems the Efergy service is no more and therefore all our equipment is redundant and useless which is such a shame as it did work nicely for a long time and I had hopes it would continue to do so.
In future I shall make sure any replacement kit I purchase allows local storage/display of data on a PC or NFS device rather than a cloud based solution. Just annoying that no-one bothered to contact users to advise us before pulling the plug.