Posted By: djhWhat makes hydrogen-making special?

Whereas metal smelting presumably has to be continuous, I'd a thought that hydrogen hydrolysis could be intermittent?

Posted By: djhneed amortising like every other application

So *no* applications can be intermittent?

There's an awful lot of "thread hijacking" on this forum, I'm undecided if this is postive or negative ... it's a bit like trying to keep a local council meeting on subject :)

Posted By: minisaurusA reason to buy a battery I guess

I don't know. Here most load shedding involves contracts with large consumers and historically has been kept away from domestic consumers. They're now trialling a domestic load shedding service where you can volunteer to take part, and for that it's very handy to have a battery.

Posted By: fostertomLike you've just done! No, it's good.

Well, since minisaurus started the thread, he can hardly hijack it! What he wants to talk about wins.

DJH said "Could you provide a link to the figures please? I'm having trouble finding them."

Sorry for delayed reply. No figures sorry. I was just looking at last years generation chart to see how much wind there was when solar was doing its bit in the sunnier months. Seems to me that any curtailment of wind isn't due the presence of excess solar but more likely transmission restrictions??

Posted By: djhNormally things are costed on the basis of continuous use. It costs money to have equipment sitting there that is waiting for spare power to become available.

Of course.

We're talking about beneficial industrial use of the more peaky/intermittent bits of the electricity generation curve, as an alternative to batteries, pumped storage etc, or paying windmills to be wheel-clamped. All of those have large costs; the cost penalty of having expensive hydrolisation plant intermittently standing idle may well be less than the other ways mentioned, to balance the grid.

But metal smelting as such 'beneficial industrial use' is out of the question, as technically the heat input has to be continuous, from first commissioning to final closure, otherwise the 'fire brick' lining cracks up.

@ revor, It's why I prefer NOT to go with Octopus. I prefer simple tariffs without the remote management.

@Gareth J - it appears I underexaggerated re. the income. I actually received 1733 + 462 kronor for 2024 = 2195 kronor = £163. However, I overexaggerated the income per kWh: £163 / 7028 kWh = £0.02 or 2p/kWh ... must have got my öre and pennies mixed up (again)

Ah, what a rubbish export value!

" domestic load shedder in my consumer unit,"

That sounds an interesting device, I've never heard of, Is a CU module or a separate add on?

Posted By: Mike1It's a CU module - I chose the Hager 60060, though there are a few others on the European market (I know of the Legrand 412021 & Delta Dore GP50).

Did not know that, learn something every day. How is it wired in? Is it just inputted from RCD and then into the UFCH and /DHW CB's?.

Posted By: revorHow is it wired in? Is it just inputted from RCD and then into the UFCH and /DHW CB's?.

Not quite - mine will be supplied via a 2A MCB, but it supplies (or cuts) up to 3 x 63mA control signals that can each switch one (or more) contactors on or off, rather than directly supplying CBs - I'll be using it with the Legrand 412501 contactor.

The 3 signals are switched off (or on - it can do NO or NC switching) in sequence. So if switching the 1st circuit cuts enough load, the other 2 will remain active. It will then try to reconnect them every 6 minutes until successful.

Posted By: djhin French :(

It's not quite as comprehensive as the French version, but this covers most of it :)
https://assets.hager.com/step-content/P/HA_22820422/Document/std.lang.all/60060_6LE007129A_L-A4-B_EN_WEB.pdf

Posted By: djhcascadocyclic

It was new to me too, but my understanding is:

- cascade = turns off one circuit then (if necessary) a 2nd, then a 3rd (cumulative: A then A+B then A+B+C)

- cyclique = tries each circuit in turn until if finds one that sheds a enough load (one at a time: A or B or C)

- cascadocyclique = combines the above. That is, tries to shed load via cyclic shedding, but if that doesn't work, adds cascading (A or B or C or A+B or A+C or B+C or A+B+C)