I've chosen a grid supplier that operates on variable wholesale rates which includes the FiT.
As the FiT ventures in to negative territory between roughly 10am to 4.30pm most days I need to somehow stop it from exporting once the batt is full.
I've currently got mode schedule for 2 x discharges at peak tariff times when it's over 20c/kWh but having the excess go back to grid through the day is literally costing me money at the moment.
Re: How to stop export of solar?
Posted: Fri Sep 19, 2025 8:46 am
by Dave Foster
There is no easy way to do that, if you have installer or agent access to the system you can manually change the exportlimit setting to stop production.
A couple of thoughts, the system supports DRM - can your grid supplier signal to it via DRM to stop export ?
The OpenAPI supports the ability to set the Export limit via an app (the Energy Stats app does this), but it isn’t automatic. If you have any programming skills the OpenAPI would let you write your own system to modify the export limit several times a day.
Finally the inverter can be connected over RS485/modbus to a home assistant and that would easily let you control in real time what the inverter is doing (no internet or cloud needed) - it could look at solar forecasts and if there is an API for the FiT prices to could easily automate the whole process.
Re: How to stop export of solar?
Posted: Fri Sep 19, 2025 8:47 am
by Will
Manually:
You'll want to set your export control to 0 which disables export.
Automatically:
Using a smart relay like a shelly integrated with home assistant, you can use the DRM pins to automatically tell the inverter to stop exporting when the rate is below zero.