Block S10E from exporting to grid

[sjongele]

Since we regularly have negative pricing for selling power to the grid, I would like to stop the S10E from exporting PV power to the grid. Has someone found a way to do that using the integration?

On a day with a decent amount of sun, I use the integration to:

1. block battery charging during the morning when prices are high: it is more attractive to sell PV power at this time,
2. start battery charging when prices get low: better to store the PV power than sell it at low or negative prices

At some point however, my batteries are full, the car is charged, the e-bikes are charged and the airco cannot consume all PV power. This means the system starts selling at negative prices. With negative prices occurring for up to 11 hours per day, with peaks down to -35 ct/kWh that is not very desirable.

The "power reduction from" option appears to potentially provide a solution, but I haven't found a way to use it using the integration.

[torbennehmer]

The integration doesn't support something like that at the moment. If you speak a bit of Python, you could try it yourself using RSCP manually. PRs would be welcome here, I currently don't have that much time for the integration. I believe, that it should be possible to limit grid-output in some way, as the units did so back in the times when small PV installations were limited to 60 or 70% when selling. Needs some research and reverse-engineering though.

[torbennehmer]

@sjongele
You may be able to implement something like that using new features in https://github.com/torbennehmer/hacs-e3dc/releases/tag/v3.11.0

https://github.com/torbennehmer/hacs-e3dc?tab=readme-ov-file#set-power-mode
Set Power Mode allows you to be more finegraind in the way you manually override the way E3DC handles energy management. This would address both pieces, you'd have to script your own triggers here.