Sun, 17 May 2026 02:51:33 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18430&Focus=310680#Comment_310680 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18430&Focus=310680#Comment_310680 Sat, 16 May 2026 10:39:24 +0100 djh Posted By: WillInAberdeenIt's no different from if you have 16 panels and a bunch of microinverters on your roof, if the mains goes off they all trip.When we installed ours there was a length of SMA coming down from the roof and lying in a coil for a while. The installer said I could put the end of the cable in my mouth and be quite safe. I was never that brave but I did check the voltage on the end of the cable - nothing.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18430&Focus=310683#Comment_310683 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18430&Focus=310683#Comment_310683 Sat, 16 May 2026 15:59:30 +0100 WillInAberdeen
Interesting comment, prompted weekend reading! (Sorry this is off topic:)

France, Germany, UK and most of the world all use the same MCBs, designed to IEC60898.

In France they will be labelled NF EN 60898, in UK they are BS EN 60898, in Germany DIN EN 60898, so on. But same device.


Like light switches, you can get multiples of the same MCB stuck together to give single pole, double pole, single pole +neutral, 3-pole, so on.

France apparently likes to use 1p+n for domestic MCBs where Germany and UK just trip L and leave N connected. There are good historical reasons for both setups. In some places eg UK hospitals we disconnect both L+N.

Similarly RCBs/RCBOs are 1p+n in France, but elsewhere they can be either kind : leave the neutral connected, or disconnect both L+N. The ones in my house disconnect both L+N.



Unlike the mains, plug-in solar microinverters don't have one connection grounded to Earth so they don't really have a L or N connection polarity as such, either connector could be L or N. Their Schuko plugs can safely be plugged in either way round in countries with reversible sockets.

You can disconnect the inverter on either the live and/or the neutral side and the inverter will stop, as unlike the mains it cannot circulate current through Earth, or through somebody standing on Earth.]]>