I am trying to find firm answer on whether Deye hybrid inverters (like SUN-3/4/5/6/8/10/12K-SG05LP3-EU-SM2, SUN-5/6/8/10/12K-SG04LP3-EU) support the same functionality like Victron Multiplus II combining power from different sources - especially when power from solar or/and battery is insufficient Victron MP adds as much power from the grid in order to compensate this insufficiency so it can comply with the load demands at the specific moment rather than switching completely to the grid.
After short conversation with chatgtp it says that this should not be possible:
Deye Hybrid Inverter Behavior: Most hybrid inverters, including the Deye SG05 series, are designed to optimize power usage by prioritizing solar first, then battery, and lastly grid power. However, the inverter typically works in a way that ensures solar and battery power are fully used before drawing grid power.
Grid Power Integration: In the scenario where solar and battery power are insufficient, the inverter can indeed draw power from the grid, but in most hybrid systems, the inverter will typically prioritize solar power and battery storage. Once these are insufficient, the inverter will switch completely to the grid to maintain the load, rather than blending the grid power with the available solar and battery resources.
Some valuable practical experience is needed here.
Thank you for sharing your experience @Vassen.
In the specs of the above mentioned three phase models, there is a parameter:
Max. Continuous AC Passthrough (grid to load) (A) 45.
I suppose there is 45A transfer switch for each phase, isn;s it? I hope 45A is no the total amps the inverter can pass from the grid to the loads since this is even bellow the inverter rated power?
In Victron Multi the total power it can supply is the inverter power rating + the power it can take from the grid (once available) and pass through the transfer switch (32A in 3000VA multi, etc).
I support it should be the same for Deye.
In my experience with a 5kVA Deye hybrid - it is able to do 5 kW of its own (i.e. battery and/or solar combined) + 5 kW from the grid without complaining. Past the 5kW from the grid it then complains as overload, etc. This is how it deals with non-essential loads too that are rated above its capacity. It’ll supply the bit that it can, and the rest comes from the grid.
OK, but you are most probably concerning single phase models.
Once speaking about 12kW three phase model for example, 45A transfer from the grid is insufficient, it is even less than the power of the inverter itself. My assumption is that it is 45A per phase, but need someone to confirm or deny this.
The pass thru for the 12 kW 3 phase is indeed listed at 45A per phase, although, in my installations I use 40A breakers on the grid and 32A on the load
