Good day all,

I have a Sunsynk inverter with the "Smart" output. I am not currently using the output for anything, but I do have a use case for it. But I thought without running cables to it to possibly integrate it to Home Assistant and switch smart switches when there are excess generation.

I currently so have a feed from SolarAssistant to Home Assistant via MQTT. I do not see an entity that pertains to the smart output or anything relating to excess power generation (I might be looking for the wrong stuff as there are a lot of entities).

My question, If the entity doesn't exist, is it possible to calculate excess generation to trigger events where smart switches can switch on or off?

Thanks

What is a smart output ?

I dont think a solar system can generate "Excess" energy as it would be against ohms law. You could however deliberately  induce a temporary load to test your panel's current capability to calculate how much extra generation you can get over and above the current load.,. By current capability I mean time of the day, cloudy or not etc.

 

I may be wrong dont take what I said as fact.

 

 

 

 

Sunsynk has this feature where it will change the generator input to an output (if a generator is not connected). You can then set a value of "additional capacity" where it will start outputting on this line once it reached the value set. For example, if you set the value to 1000W above current generation and your usage is let's say 1200W, it will then check if there is additional generation capacity available and once it hits the 2200W mark it will make the output available. They call it "Smart" or "Aux" output. I'm not sure how it works though, I would think that the inducing a fictitious load somehow which will only pull from the panels. Here is a link I just found on the subject explained in detail by "GreenFields" 

 

I was thinking of running a load load every 20 minutes or so to check what the current output is, but that seems counter productive. I would rather want to tap into that signal, as you can clearly see on the display when the "Smart" function is enabled...it is actually quite interesting to watch on a cloudy day, as it will appear and disappear as the clouds move.