Feature Request: allow changing of DC Charger Mode without need for EMS operating mode

[ryanmcgoldrick47]

▎ The integration currently exposes switch.sigen_inverter_dc_charger_dc_charging for on/off control of the DC charger, but there is no entity to control the DC charger operating mode.
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▎ In the MySigen app, the DC charger has a separate mode selector (independent of the EMS work mode) with options including at minimum: Fast Charge, PV Surplus, and V2X (vehicle-to-grid/home discharging).
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▎ Request: Please add a select entity for the DC charger operating mode, similar to how select.sigen_plant_remote_ems_control_mode works for the EMS. This would allow users to switch between charging modes from Home Assistant without needing to change the EMS mode away from VPP scheduling.
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▎ The underlying Modbus register for this likely sits alongside the existing DC charger registers. The entity would ideally be something like select.sigen_inverter_dc_charger_operating_mode.
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▎ Hardware: Sigenergy inverter with integrated DC charger (EVDC)
▎ Integration version: 1.2.0

reason dont want to use EMS as with energy retailer Amber with VPP and it boots their control off if home assistant is set to EMS for signergy.

but want to be able to change charger mode between PV surpluss fast charge etc like I still can in the mysigen app.

[LeighBicknell]

To my knowledge the ModBus does not yet support this.

Suggest reaching out to Sigenergy to add support, or to Amber and ask them to allow self managed automation (where you hit their API to get event information, and then update the Sigen settings yourself.