Thank you @B51-technician b51 for the additional information.
Can you please advise if this is the style of anti vibration wall plug that you used:
I deployed those ones here:
Thank you for the info. It appears that the plugs you used are only available in Germany. I think the ones I posted are about the best I will get in the UK.
Amazon sells it in Germany as well. Maybe they ship to UK. The one on your picture might not isolate enough and might not take the weight of an MPII mounted on a stone brick wall.
I checked online and unfortunately they do not ship to UK. It is now my challenge to find a local retailer.
For mounting a few Multi / Quattro’s I’ve used Rawplug Rawlnuts in the UK from Screwfix: https://www.screwfix.com/search?search=rawlnut
Hello Community,
is anyone having experience with multiple different MultiPlus hardware versions regarding fan and hum noise? In particular, are there models known as more quiet and others as tentative loud?
regards, Alfredo
Thanks @Al-2.0 They look very similar to the ones I posted but probably a better quality. Can I be a bit pedantic, as I only want to take the heavy machine off the wall once. Did you go for an M6 size with 50mm length and use a cheese head screw (it is not clear how much clearance there is between the bracket and the machine for say a rubber washer plus bolt head)? Did you also have a rubber grommet on the Victron mount to reduce vibration transfer?
At the moment, using your information and that from @B51-technician , I am intending to remove the transformer and put a rubber isolation pad behind it, install the Rawl Flexi Plug, with grommets and cut the edge of the fan to stop the power cable being squeezed between it and the case.
I am hoping to be able to remove the strap to stop the enclosure from vibrating, but I doubt that will be the case. I have already glued sound proofing to the back of it.
In answer to your question @B51-technician my serial number starts HQ2315, it is meant to be quiet but it is far from being that.
Like others I struggle to understand why Victron would spoil a great product by not taking some basic measures.
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In Our company, we have some Fronius Tauro 50 kW.
They are hanging at chains from the steel beams and only touching the wall with some rubber-spacers.
Chains are also “decoupled” by using some rubber spacers that are usually used along with ships to give towing a bit of flexibility.
These guys here:
Works quite well, could imagine that might silence the multis as well 
(Well at least avoids vibrations to spread out through walls and stuff)
Good find Tony, I was wondering what to use for mounting. Is the threaded insert slightly set in from the front so that the rubber bunches up when tightened and holds into the hole? If not then it’s just a thread in a rubber mount and the hole needs to be carefully-sized for a friction-fit to have any pull-out resistance. The multiplus is almost entirely loaded in shear but it’s also bloody heavy so I want to be sure it will stay in the wall!
Pack of 50 at £27 is tiresome when I want 3 (i.e £1.50-worth). Has anyone bought a pack of these and is prepared to post them in 3s for Multiplus mounters at reasonable cost? Should be a nice little ebay sideline.
EDIT: turns out Namrick Nutstore is already doing this on ebay: 5 off M5x40 for £7.47. Rubber Ankernut - Rawlnut - Ramnut M5 M6 M8 M10 | eBay
3 for a fiver would have been nice, but this will do.