Dynamic Power Limiter Limitations
You are probably expecting a lot from the Dynamic Power Limiter (DPL).
And sometimes you may feel disapointed, realising that the DPL does not balance the "zero feed throttle" (Nulleinspeisung) as well as you would expect.
Although it is understandable you may consider the cause of error to be in the DPL programming, there are some other areas you need to look for:
Community member peff74 made some interesting observations:
On close inspection of the performance of the Hoymiles HM-700, I noticed that an inverter with many Inputs connected to the battery, has a brief power dip of 50W about once a minute.
You can only see this on the electricity meter itself, as it spits out 2 values per second.
If the information one of these power dips reaches the OpenDTU-OnBattery, the DPL will proceed to the necessary adejustmnets and later back again. Result --> oscillation.
I have noticed this particularly strongly at power levels around 100-200W and when many Inputs are connected:
With only one Input connected to the Battery:
With many Inputs connected to the Battery:
whereas as of 250W, the oscillations seems to disappear.
The problem only exists in the 15-35% relative limit range. Whereby it occurs most strongly around 25%.
You can see it clearly in the live view. The limit has not changed, however inverter power jumps almost 20W per channel from one moment to the next:
We can not confirm whether this problem as a general issue of all inverters, or something related to a specific model or specific Firmware Version.