[Jeremy Harris]

The Zappi has far and away the better open PEN fault protection system of the two, the Hypervolt uses a crude voltage sensing system I believe, so will false alarm if the supply voltage is on the high side and may not always detect a true open PEN fault either. I don't have a Zappi, or any connection with them, but did recently install an Eddi and have to say I'm very impressed with both the engineering and the firmware. It seems that Myenergi have put a great deal of effort into making their products as versatile and easy to use as possible.

 

[Jeremy Harris]

Definitely worth considering the Indra, IMHO. The two best charge points (in terms of the effectiveness of their safety provisions) are the Indra and the Zappi, AFAIK no others come close.

 

[Jeremy Harris]

Myenergi used to have a very detailed article on their website explaining open PEN faults and their protection solution, but seem to have pulled it. Which is a shame.

They seem to have lost a lot of stuff on their website over the past couple of days. I was part way through reading the wiki on the Eddi when it disappeared, seems they have pulled a lot of content off the site for some reason. There's an efixx video with Dr Chris Horne from Myenergi covering the open PEN protection which is worth a watch, I linked to it in this post: British Gas Hive EV charger - Alfen Eve S-Line