ESB did not upgrade to 100A fuse

So who installed the 80A fuse in your CU? Was it ESBN? As @KCross said, presuming your ESBN fuse is also at least 80A, that is what you have access too. So basically a nearly free upgrade from a 8kVA to a 16kVA MIC 😁

I would stay a good few amps below this so not to risk blowing the ESBN side fuse

In other words: happy days

OK, definitely talk to your electrician then.

ESBn are saying you have an 8kVA connection but you now appear to have the ability to pull 16kVA.

The ESB cable from the pole to the meter box needs to be able to handle that doubling of load. You need to get input from your electrician here based on what ESBn have just told you.

With an 80A CU fuse, you will need to be on a 16kVA MIC for it to be legit (and obviously all other cabling / fuses to be according to the regs)

There are KM and KM of lines that need to be done though.

I'm 5KM from Dublin City Centre and we (and everyone nearby) is on overhead supply.

I happen to have 3-phase but everything is screw in fuses and under powered tails, earths etc.

Oh I'm not making light of the work to be done, it is huge. But ESBN saw it all coming and should have gone all out upgrading everything from about 10 years ago. And it doesn't cost them a cent, whatever the total costs are, with a nice margin for their profit, will be paid for by the end users.

5km from the city centre and your whole area is still on overhead supply? That is mad though. Do you mind me asking whereabouts in Dublin that is? Do you suffer regular power cuts in storms and all that?

I asked this question in the electrics forum and while you will probably get away with it, it doesn't seem a good idea to just "up" the consumer side to 80A while still being on a 12kVA MIC

I would be happy to have the works done like the OP, but not if it isn't 100% legit. Any way we can get this officially confirmed as kosher?

@graememk - "I wouldnt have a 80amp Main MCB on an ESB 80 amp fuse. Too little margin for error. "

But that is exactly what the OP has now?

I wouldn't worry about the margin for error if you have the myenergi hardware. You could just set the max draw to 75A or whatever to be safe. Technically / hardware wise it all seems fine.

I AM worried about the legalities and insurance implications of this setup.

Its the same in many areas of Dublin, lots of streets in Terenure, Templeogue, Rathfarnham, Rathmines are like this.
Total PITA when getting deliveries or doing renovations, I had to get a temporary pole installed to divert the line away from the house.

AFAIR the 100A fuse cut out holder is physically larger than the 63/80A fuse cut out holder as the 100A fuse is physically larger.
Of course as others have said here it depends on the wires coming in to the house and what size they are if they can supply the load you are looking for.

Are you fed from OHL or an underground cable?