Thanks for the replies.

Apparently G83/1 was introduced in Sept 2003 specifically aimed at small
scale generators, ie: 16Amp export, as opposed to G59 which remains in
place for larger generators. Micro-CHP seems to range between 1KW and
3KW, and (eg) the Whispergen unit has all the G83/1 certification. No
mention of metering though.

It sounds from the replies as though there are a number of metering
possibilities and export arrangements with the supplier, and it's
certainly not clear cut. What I'm trying to work out though is what my
responsibilities are as opposed to by electricity supplier. In
particular, if I simply inform my supplier that I've installed a G83/1
compliant generator and do nothing else, then am I breaking any
regulations? Or is it entirely at the supplier's discretion and the
regulations simply don't cover this situation (yet)? Obviously I'm
happy to be flexible within reason, but if the supplier comes back with
something like 'we need to install new metering and we'll be sending you
the bill for £500', or 'sorry, but you're in breach of contract by
exporting so stop it or we'll disconnect you' then I want to know where
I stand.

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