Great video, keep experimenting please! Considering the case where power outages happen quite often during the day when the sun is shining, wouldn't it be better to let that hybrid inverter (with a minimal bank of batteries) form the grid and let a microinverter or a grid tied contribute? If I an not mistaken, any excess produced by the panels should be routed by the hybrid inverter back to the batteries to charge them. When the batteries start getting full and there's still an excess of generated solar power, the hybrid inverter would then start to increase the frequency to a certain value where aforementioned microinverters or grid-tied ones will disconnect. How do you find this kind of setup? Your expertise is super valuable on my decision making process. I am considering that kind of deployment since I face this situation a lot.
Hello, Yes your suggestion will work to a point... On the Deye/sunsynk inverters there is also an AUX port which can be for set for a few different uses - Generator, Load control ( for a water heater) and Micro Inverter. If you physically wire in the Micro inverter / other grid inverter into this AUX input then you can set the On/Off thresholds. I'm not sure if this input is still active when the grid is lost...I will have to try it at some point. The other option you could do is wire your "grid inverters" via a Voltage Sense Relay which is attached to the batteries so when they are fully charged then that relay will disconnected your "grid-tied-off-grid inverter"... I hope that makes sense?
@@roadeycarl My proposal was more targeting islanding while the grid is not available. Hence, I would leave the AUX input (I did not know it actually existed though) free in case in the future I have another extra source like a small diesel generator. In my proposal, the point of common connection between the microinverters and the the Deye/ Sunsynk would be at the output of the latter one. With these configuration, the whole wiring would remain unchanged and the microinverters wouldn't even notice that the utility grid is present or not since it's Deye/Sunsynk who's dictating the frequency of the "new grid". Could you try this setup?
Yes this setup works as it's what I'm currently running on my 8kw inverter. You just have to make sure that the grid tie system doesn't exceed the total AC power rating of the sunsynk/deye inverter.
