Importing too much from grid
I've run into a bit of a deadend with an issue I'm having with my Sigenstor settings.
I have 15kW solar PV feeding a 48kWh 3PH Sigenstor battery with a 25kW inverter. My power plan has a 3 hour period for free gris imports (11am-2pm) capped at 24kWh. I have set up a time-based Operational Mode between 11:00-14:00 with maximum power for importing from grid set to 8kW and maximum power for charging battery set to 8kW. However, today I noticed that the solar PV was generating at around 9kW, Load was around 6kW and the battery was charging at about 17kW with 14kW draw from the grid, meaning that the 24kWh free energy cap was breached.
It looks like my settings are applying the full 8kW allowable from the grid to charging the battery plus all of the power generated from the solar PV with the load being fed from the grid. What I was expecting was that the load would be fed from the solar PV with excess charging the battery along with 8kW from the grid charging the battery – no grid power being used for the load unless the power from the solar fell below the load. The Solar Producing Source Priority is set to Basic Load > Sigen Battery > Grid.
It looks like I should be able to set a Grid Import Power Limit but this option is disabled (Grid Settings are either locked or disabled, with the exception of Block Battery Grid Export). I'm also not sure whether I can just set this limit to 8kW to apply only during this 11:00-14:00 period. I've read about custom modes being able to unlock some of the grid settings but I can't see anywhere to set any custom modes.
What am I missing here? All I want is for the system to draw from the grid to prioritise charging the battery at up to 8kW and direct nothing for the load, unless there is insufficient solar to cover the load.
Also, just starting today, the Energy Statistics, Sankey Diagram, Power Metrics Chart and Battery SOC Chart have all started lagging by over 2 hours in both the app and on the web interface. All software is up to date.