We recently had a solar system installed. It has 11kw of panels with an 8k Deye hybrid inverter. Most of our appliances are small fans and our three air-conditioners are all inverter types. What I failed to disclose to the installers was we also have a ShopVac (1,500w) and a pressure washer (2,200w). Fearing that repetitive usage of these might cause premature failure to the hybrid inverter, AND due to the DIY itch, I thought of having a Multiplus II 48V 5000VA 70/50 sit in between the hybrid inverter and the mentioned appliances to prevent any inrush current from propagating to the hybrid inverter.
Since the deye is 8kVa and the victron is 5kVa the answer is you should not.
This is an AC couple design and it should follow the 1:1 rule of ac pv to inverter size. (You don’t show a battery on the deye so i assume its in ac pv mode?)
You are correct. It’s a cascading system. I read that it’s not supported so I really don’t plan on burdening Victron’s support about this; thus, I reached out to the community for some feedback.
The entire house is connected to the Deye on its critical out. We peak at 5kw at times but it’s usually 4kw. The ShopVac (1,500w) and a pressure washer (2,200w) are the appliances that I am afraid to connect to the Deye due to their high inrush current. I am thinking that the Multiplus II would be able to prevent the inrush current generated by these appliances from propagating to the Deye by the help of the settings below.
In rush is more of an issue (on the output of an inverter) if there is no grid connected to supplement. Are you wanting to move the loads there (so potential short peak overloads if they run one at a time)?
The CT for the deye will allow solar to cover the load once the inrush was taken up by the grid.
So what is the end goal here? To have the victron act as grid/generator for the Deye and there is no grid available?
In rush is more of an issue (on the output of an inverter) if there is no grid connected to supplement
This is good information! So does this mean that my fear of frying the MOSFETs of the Deye inverter is wrong?
Are you wanting to move the loads there (so potential short peak overloads if they run one at a time)?
I want to move the loads with high inrush currents to the Multiplus II’s side so the Deye’s MOSFETs won’t get burdened by it.
So what is the end goal here? To have the victron act as grid/generator for the Deye and there is no grid available?
The original end goal was to protect the Deye inverter from the inrush current generated by the motor-driven appliances. But if you say that the inrush current won’t hurt the Deye since it’s connected to the grid, then I can just directly connect the motor-driven appliances to the Deye’s output.
I would no longer use my Multiplus II in this cascading setup. I will use it in another project.
I am guessing you are speaking from a 1st-world country.
I live in a country where Victron products are hard or too expensive to obtain. I checked Victron’s website for an official distributor for my country. I found several and messaged them. I got no response. I jumped in to Amazon and purchased SmartSolar MPPT 100/20 in increments so I do not need incur taxes. I have two now. Unfortunately, some constraints could not be overcome and I ended up purchasing a solar system from an installer.
Please don’t read it like I am getting support from Deye from the Victron community. I did try to reach out to support from their community but I didn’t get a definitive response. Will I end up with the same with Victron?
If you’re doubting me, here’s the test setup. I am only missing the batteries because they are expensive now in our country due to the war. Everyone wants solar. I just got lucky that I was able to purchase the Deye setup mere days before the war started. My DIY heart still wants a Victron.
Just tongue in cheek. No stress.
There is no better diy or customisable platform than victron.
We have good representation here on the forum. This new version came about to accommodate the growing diy and mobile user base.
We can’t solve everything but we do try.
I would personally have the bigger loads on the victron output on the ac out of the Deye let that power assist the loads off the Deye. (Not ESS maybe solar wind priority if you want to use the solar more)
If i recall their passthrough power is not quite what the label says.
PS add some battery balancers to those 12v, you will be having problems if you don’t.
Thank you for the suggestion. I guess that confirms that my setup would solve my concern.
As for the battery, they’re there for testing. I am still trying to talk to a supplied of a Dyness or Pylontech battery in our country. I want to verify their warranty process first. While waiting, I am exploring the firmware and attempting to gather behavioral and performance (solar production, charging) data.
I’m looking forward to having this commissioned. I appreciate that Victron is so versatile and its features are well documented. As a programmer with an background in electronics, reading their documentation and discovering that they published the VE.Direct protocol, are some of the reasons why I have high admiration of the brand.
