Battery - to take advantage of 2am to 5am cheap rate electricity - v2

You are wrong again. Those fuses haven't been used for many decades. You state with authority that I have one. I don't. Never had. My tails are 16mm2. I have a modern MCB. Stop scaremongering.

You could consider both viewpoints right. The upper limit of the house is 63amps usually. The ESB fuse is 80 amps. You need a significantly higher load or a moderately sustained load over the rated to pop them. The wiring to the meter would be rated to take at least 63amps or significantly higher in most places. Although in older properties that could be questionable. And in newer properties its probable that with good tails they can come close to the 80amps, if they want to pay the ESB for the privilege of getting a thumbs up from them.

In the past, you would define a standard like the MIC and set it at something like 12kVA. Since, the vast majority of high load electrical items in the past just pulled power without awareness, you created some headroom like the roughly 20% I see right now. And wiring in the house you would use that as the upper limit for combined load, again having some headroom so you don't blow fuses all the time.

With modern setups where they have meters, current clamps, invertors and informed intelligence, so they can in fact ignore the headroom and aim right for the limit because they can mitigate that fuse pop. So a smart system can in fact sit around that 60amp mark easily, but a dumb system would be a single device pulling its 13amps at the plug away from a breaker trip.

And claiming the tails/board of one person can't take 63amps, when he has 16mm tails there but my house can take circa 50 amps sustained with 10mm tails is a bit of a stretch of logic to prove a point which isn't needed. Also in theory nowadays, a house can have far more then 12kw total going through it, since it can be pulling from the grid and pulling from solar too.

I am curious now though, does upping the MIC increase your standing charges or rates? Is the board MCB set at 80amps too? Or do ESB up their fuse again to something like 100amps.

Not sure if it increases the standing charge, but I did just have a quote for MIC increase to 16kva from ESBN done recently and they came over inspected the ESB box and said they just change the fuse to 80a for the "low low" price of €2000, which would mean the existing one is 63a.

Funny thing the technician told me you can go to 20kva or even 29kva on singe phase 😍

You're already on 16kva if they installed the 80a fuse since for 16kva they upgrade from 63a to 80a if I'm not mistaken.

Ok so then if I'm on 12kva there is an 80a fuse already and they put a 100a one if going for 16kva upgrade.

Which would make sense that I didn't blow the esb fuse at 15kw o'clock

I've been saying that. If the government wants to be serious about moving away from fossil fuels, they would need to nudge people toward electric. An important part of that plan would be to pay ESBn to perform MIC upgrades that are free to the public (home owner pays for any internal upgrades to consumer unit etc.). I certainly won't pay €2068 for ESBN to just swap their fuse from an 80A one to a 100A one so I officially have a 16kVA MIC, but I have no problem paying for any upgrade work needed on my side

Government should also provide a premium for having gas disconnected. At the moment you pay a near 4 figure fine for doing that. I sure won't pay any fine. I will keep my gas until I am incentivised to stop using it