Anyone got a Deye 10kW inverter - thoughts and experience?

[Crossy]

The ferrite rings are a new thing, only my latest inverter came with them. They are supposed to reduce EM (electromagnetic) interference, I admit mine are still in the bag

 

What communication protocol is supported by your existing batteries??

[Sophon]

58 minutes ago, Crossy said:

The ferrite rings are a new thing, only my latest inverter came with them. They are supposed to reduce EM (electromagnetic) interference, I admit mine are still in the bag

 

What communication protocol is supported by your existing batteries??

 

I have no idea. I have two 280aH batteries connected in parallel without communication with the inverter, everything is controlled by voltage. One of my packs is a DIY job, while the other is the same Liyuan battery (with JK BMS) that you have.

 

If the Deye inverter doesn't work without communication established, can I just connect the communication cable between the inverter and the Liyuan battery pack?

[Crossy]

The Deye unit works just fine with no BMS comms, many people like to run "open-loop" like this because it give them "more control" over the charge parameters. Personally I run everything "closed-loop" (with comms) which allows the BMS(s) to control what the inverter does.

Each to his own.

 

I'm pretty sure the Deye will talk to the JK BMS (you will need to verify which protocols are supported by each). Note that our Liyuan boxes have Seplos BMS's

 

I was running for a while with several non-communicating packs in parallel with ones that communicated. It worked just fine in both open and closed loop.

 

[lom]

16 hours ago, Sophon said:

 

The incoming supply to the house is buried underground, so connecting the two earths would mean digging up the NYY cable and run a wire between the two earths. Not really something I want to do if I can avoid it.

 

With regards to the PV panel surge arresters, I was thinking of running each of the three strings through one of these so-called "combiner" boxes:

 

If I were to do that, what MCB amperage should I go for? My current panels have open circuit amperages of 8.79 to 10.12A, but I would like to have the flexibility to easily connect future panels with different specs (maybe even connect two strings in parallel). Would 25A be a reasonable compromise between safety and flexibility?

 

When open circuit there will be no current, the current will flow first when the MPPT draws current from the panels.

If you plan for connecting two strings in parallel in the future then use two of the single string boxes above and one 2-to-1 box. The combiner boxes has glass fuses, surge protectors and an MCB for each input string and the combine of two string into one is done on the output of the MCB so you can at any time disable one of the combined strings.

[lom]

16 hours ago, Sophon said:

I could optimize the production from each string. It would also free up space in my existing CU, as I would no longer need the MCBs to be in there.

Never mix DC and AC in the same CU...

[lom]

31 minutes ago, Sophon said:

If the Deye inverter doesn't work without communication established, can I just connect the communication cable between the inverter and the Liyuan battery pack?

Deye uses the Pylon protocol to speak with a master BMS over CAN and the masters uses RS-485/Modbus to speak with the slaves. I'm not sure if you can have one brand of BMS as Master and another brand as slave but if you use all your batteries as slave then Deye can speak with all of them over RS-485/Modbus and you will be able to see each battery's parameters/status in the Deye battery setup.

[Sophon]

11 minutes ago, lom said:

Never mix DC and AC in the same CU...

 

What is the reasoning for this?

[Sophon]

4 minutes ago, lom said:

Deye uses the Pylon protocol to speak with a master BMS over CAN and the masters uses RS-485/Modbus to speak with the slaves. I'm not sure if you can have one brand of BMS as Master and another brand as slave but if you use all your batteries as slave then Deye can speak with all of them over RS-485/Modbus and you will be able to see each battery's parameters/status in the Deye battery setup.

 

Because of the location I will not have the inverter connected to WIFI, so if I want to see data/status I have to physically go down to my equipment. So seeing the batteries parameters in the inverter doesn't really give me any benefit, I can just check the batteries directly.

 

There is one place in the house that I am able to pick up the bluetooth from my DIY battery pack, but not from my Liyuan pack.