I looked around at this when doing our kitchen, We wanted an induction hob as they are the most efficient (at moment). We found a hob from Neff that could be switched to take a lower load as they can take 7kW on power up but at end of day have never used that function because we installed a battery with our PV so that works to top up the solar rather than take from the grid. Even so when we put anything on the hob we ramp the power up on the "ring" because a big load at once will take a spike from the grid as the system works out what it needs to provide. I would think that what you are looking for won't exist but I may be wrong.

As a keen cook, I've wondered why you can't get ovens that modulate - it's either 2.2kW peddle to the metal or off. I'd like a more consistent temperature rather than it fluctuating above and below the target temp. For some things like meringues or custards you really don't want over heating.

Posted By: philedgeA power limited hob that fires individual rings in sequence will help but the wife turned white and started shaking when I mentioned 'power limited'!! Finding out how to bypass the limit will likely be the first time shes ever read an appliance manual in her life!!

FWIW, we got an induction hob in 2015. It's highish power (it's own 40A MCB from memory) because SWMBO is Chinese and does frequent stir frying. So far we're still happily married :) Around the same time some friends, again a Chinese wife, got a then-new Neff induction hob limited to 13A because they were retrofitting in an existing kitchen. AFAIK they've been happy with it, which has surprised me. So I guess the power-saving features work.

Posted By: WillInAberdeenWouldn't work (I guess) with an induction hob

Induction hobs are basically a load of electronics. They like a reliable, good quality electrical supply so the electronics works properly. PV diverters slice up the waveform something awful (some in different ways to others) but I wouldn't want to feed their output into an electronic device. Basic resistance heaters, yes, can cope with a dirty supply.

That was what I assumed when I guessed it wouldn't work. However, thinking about it, the control electronics will run off low voltage DC, so there must be a rectifier, buck converter and smoothing filter in there, before the messy mains gets anywhere near the control electronic bits. The induction heater itself is just half of a transformer (the pan is the other half). Power is rectified to DC then chopped up again to a very high frequency AC, so it has a rectifier, a very high frequency inverter with resonator and large filters on the way in and out.

So overall the waveforms inside the induction hob are far more messed up than anything the PV diverter can do. So it might well work.

Experiment at your own risk!

Edit: somebody measured the waveform of an induction hob element: frequency ~20kHz , voltage is a kind of half-wave shape ~ +50/-900 V, current is out of phase, so real power will be quite noisy. This must be pretty well filtered from the mains, and vv.