It would be fantastic to be able to set a mode where you can request a discharge over and above the current usage. It would be like doing a force discharge while in self use mode.
Real world scenario. Globird's Zero Hero tariff. If you use less than 0.03kwh in the period you get a credit. Additionally there is a bonus FIT for export during this time.
It would be great if I could say discharge from the battery at 5kw OVER what ever my current usage is. I.e. If my load is currently 0.8kw I would discharge from the battery at 5.8kw with the excess going to the grid. If my AC turns on and my load increases to 6.8kw the batteries discharge rate would increase to 11.8kw.
Currently if I want to export 5kw to during this tariff period using force discharge it will only discharge at 5kw. If my load increases beyond 5kw I will draw from the grid, which when you think about it is silly if I have the storage and headroom in the inverter.
I believe this is technically possible as it would pretty much be like setting the meter compensation to 5kw (at least in theory in my head) during this work type period.
This would allow me to use power as normal and export power without ending up importing if load increases.
You can use export limits to do that. If you set export limit to 5 kW, it will feed in at 5 kW during force discharge, and will cover the house load too.
You can change it on the inverter but the new app has the setting in quick settings menu too.
You can change it on the inverter but the new app has the setting in quick settings menu too.
I made a post just a few minutes ago about Force Discharge and how it works with your Self-use.
Video at bottom to view.
viewtopic.php?p=12928#p12928
I would say, you can ONLY convert xx kW from your DC into AC power, that is the limit if your hardware on your Inverter. My EP11 can supply almost 25kW for 60s (65Amps at 384V nominal) but the Inverter can only supply 7kW.
Video at bottom to view.
viewtopic.php?p=12928#p12928
I would say, you can ONLY convert xx kW from your DC into AC power, that is the limit if your hardware on your Inverter. My EP11 can supply almost 25kW for 60s (65Amps at 384V nominal) but the Inverter can only supply 7kW.
Thanks, I will need to take a read and wrap my head around it.
What I am after is wanting it to vary its discharge rate to match my houses load (as in Self Use mode) + what I want it to export.
So im using 1kw load and want it to export 5kw above my load. My load then increases to 7kw when the AC is on or 10kw when the AC and Spa are on, so it would discharge at 15kw (or my inverters Max, or maximum discharge rate set in config) so that I can self use 10kw and export 5kw to the grid . I didn't think that is how any force discharge mode works. It was my understanding that with a 5kw force discharge it will only discharge at 5kw and if my load increases it will reduce my Export to the grid and when my load exceeds the 5kw forced export I will end up importing the exceed required from the grid.
That's how it works with export limit - you set the maximum limit in the force discharge setting (60 kW is the default) but due to export limit the inverter will throttle the battery discharge rate (and PV output if any) to cover the load and do feed in but do not exceed the export limit (i.e. if you house consumes 2kW and export limit is set to 5kW, battery will discharge at 7kW)
This already works fine, if you viewed my video it's pretty clear showing it working.
My KH7 Inverter has 7kW it can generate, my export limit hard coded at 3.9kW for regulations (G99 certificate in UK)
At the start of the video, the system is set to "Feed-in" so I don't use PV to charge battery at all. I then turn on Force Discharge mode, that shows at 9s and off again.
Timeline @8s: Inverter is supplying house load only
Load (Home) = 299 W
Battery = 282 W
Grid = 17 W
Timeline @9s: Inverter is Force-Discharge mode to Export to grid
Load (Home) = 422 W
Battery = 4333 W
Grid = 3910 W
As you can see from the video and the timeline, the 7000 Watts that the Inverter can produce, it still has headroom. So if my Load (Home) increased to 5000 Watts, the "spare" 2000 Watts would be exported to grid, as it is less than the 3900 Watt "Cap" set by my export limit.
My KH7 Inverter has 7kW it can generate, my export limit hard coded at 3.9kW for regulations (G99 certificate in UK)
At the start of the video, the system is set to "Feed-in" so I don't use PV to charge battery at all. I then turn on Force Discharge mode, that shows at 9s and off again.
Timeline @8s: Inverter is supplying house load only
Load (Home) = 299 W
Battery = 282 W
Grid = 17 W
Timeline @9s: Inverter is Force-Discharge mode to Export to grid
Load (Home) = 422 W
Battery = 4333 W
Grid = 3910 W
As you can see from the video and the timeline, the 7000 Watts that the Inverter can produce, it still has headroom. So if my Load (Home) increased to 5000 Watts, the "spare" 2000 Watts would be exported to grid, as it is less than the 3900 Watt "Cap" set by my export limit.