Water heating with excess energy

[reef yacht]

Hello,
i want to heat my water with my excess energy.
As Sungrow cant display my Battery as excess i need to confuigure a device, something like a pi or similar.
I know how it should work im just not experienced enough to create it.
The plan:
SH 20RT + SBR256 -> Rasepery Pi -> dig. Relay open/close -> heating rod (MyPV AC-Elwa2)
The Pi should read if there is excess energy (more than 1,5kW) or if the Battery is between 5-100%. in both cases the relay should open and if both are not true the relay should close.
if anyone has a Solution or Support i would be really thankfull!

[bleak walrus]

Are you already using home assistant?

[polar brook]

Would you have export before you charge up your battery? If not, it could be as simple as getting a CT clamp on your electricity meter tails like a Shelly EM and have a Shelly relay to turn on the heater.

[reef yacht]

No. Im looking for someone who can provide me with the right software and hardware, beacause i dont know how to code it. I can only install a finished Product.

[bleak walrus]

I'd say home assistant isn't the right solution for you if you don't want to invest any time into learning how to use it

[silent moon]

what kind of money are you looking to spend? you can hire an engineer to build it for you

[bleak walrus]

That's obviously an option as well

[reef yacht]

Im working at a company we are looking for someone to biuld this for us. If anyone can do it please let me know how much.

[reef yacht]

I´m looking for someone to build it because we as a company don´t have the capacity for it.

[bleak walrus]

https://github.com/mkaiser/Sungrow-SHx-Inverter-Modbus-Home-Assistant there seems to be a HACS integration for the inverter - without having spent too much time on it I'm pretty sure it is possible to do. The problem is just finding someone doing it for you without you investing any time into it.

creating the automation logic itself is trivial