Shelly Dimmer 0/1-10V PM well supported in HA?

Hardware
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1

I want to regulate the power consumption of my 2000W electric boiler, using the Shelly Dimmer 0/1-10V PM, and a proportional 0-10V SSR.
Is it easy in HA to set the output voltage of the dimmer, perhaps someone can post some examples ?

What I want to do is, via the Homewizard P1 meter, read how much power my solar panels inject into the electricity network, and set the power consumption of the boiler, so that it only works when I inject power to the grid.
So when I inject 300 W into the grid, the boiler should only consume 300W, and when the solar panels inject more than 2000 W, the boiler can work at its full 2000 power.
The power consumption of the boiler needs to be proportional to the grid injection, in order to always work on solar power, instead of taking power from the grid.

2

I have similar DIY setup, triac based voltage regulator and Esphome controlling heating element based on the excess measured by Shelly EM.
I like your idea of using 0-10V SSR though. I suggest you to get quality SSR, not the $5 one from AE. Also be aware that in 0-10V control one of the devices has to source current. So you should at least have a datasheet for the SSR.
I’m not 100% sure, but I believe gen3 shelly is sourcing type while previous gen2 was sinking type.

3

Thanks for your suggestion about sourcing/sinking, I thought that the Shelly dimmer by default provided the control voltage for the ssr.
The SSR I looked at is a type that is used to drive industrial CNC machine motors, it is specified for 40A, and above 10A it needs additional cooling.
It does not provide a 10V source, so I need to check if the Shelly dimmer is providing the voltage source to drive the SSR.

4

For sure it does, but who is providing the current…
Anyway I’m quite confident gen3 Shelly does it.

5

I found it in the Shelly data, it says current sourcing, up to 35 mA

6

Good.
By the way, read the SSR datasheet carefully, especially minimum load current and firing method applied.

7

The Shelly dimmer arrived, I used the HA built in integration to connect to it, but HA only provides an on-off switch entity, nothing to control the dimmer voltage.
I looked in the HA shelly integration docs, but I don’t see a solution there either, apart from some cryptic sentence

Shelly device relays are added to Home Assistant by default as switch entities. 
A relay can be added as a light entity if EXTERNAL CONSUMPTION TYPE 
value is set to light.

Any ideas on how to control the dimmer brightness ?