AFAIK and reading numerous sources ....
The inspection is ONLY required to allow you to connect your 'van to the "public grid".... site owners will need to see the report in order before you connect to the EHU. As the busybodies who invented this believe you "may" connect to the public grid at home, if you don't have the inspection done you have to sign a disclaimer at your caravan service centre..... this is to get them off the hook if it all goes pearshaped.
The Inspection includes 500volt insulation testing, so ALL appliances and electronics must be disconnected BEFORE the insulation test is done .. or they'll simply be frazzled .. it takes time to disconnect then reconnect everything
All switches/plugs/wires are inspected. As many of these are behind units/falsework there is a degree of dismantling required .. this takes time.
BTW .. this only applies to 240 system .. not the 12 v system ..... at the moment.
Now the cruncher ..... It is the person who does the inspection who decides when the next one is due, between 12 months and 3 years .... "depending on the circumstances and use of the caravan" ... as they have no idea what usage it will get ... my bet is they all go for 12 months as a "H&S" call

so my place charges £68 an hour ... 4 hours ...?? £272. Every 12 months.... in addition to the compulsory service to maintain the waranty.

And ...... my next bet .... the makers will then insist on this inspection in order maintain the warranty .....
so .. a nice little earner thought up to fleece the actual buyers and users, under the pretence of "H&S" .. again.
I've been 'vaning over 20 years and know of NO instances where injury has been caused by a mains electric problem inside a van.. as the RCD has always tripped .. as it should...
