Morning everyone

I have just made the move from gel batteries to lithium. I acquired 2 x Greenrich UP 5000 lithiums

From a battery power perspective, everything seems to be working well, I am just struggling to confirm communication between the Voltronic and the batteries.

I have tried numerous cable pinouts, CAN, RS485 port, but it does not seem as if I am getting it right.

Currently I am connecting a cable from the RS485 port to the Inverter's (Axpert King(Voltronic)) Lithium connector, using RJ 45, with pins on the cable as follows:

Inv Pin 3 to bat pin 8, Inv pin 5 to bat pin 7

I have also configured the Inverter's battery setting's as "Use", with voltages set to 56volt for both bulk and float charge.

Any assistance in terms of both Inverter to battery BMS cable pinouts as well as Inverter setup will be appreciated as I am not seeing things like proper SOC, nor do I see the cycle counter going up.

2 hours ago, Gerhard van Venrooy said:

I have also configured the Inverter's battery setting's as "Use", with voltages set to 56volt for both bulk and float charge.

In order for the inverter to read from the BMS you need to change the battery setting to PYL or one of the other lithium settings available. I am not sure which lithium setting to use with the greenrich, but I know the PYL setting uses the pylontech protocol over RS485, some apparently use CAN and/or other protocols, but I don't know what they are, there is no info in the King manual. If you switch to the PYL setting and the inverter doesn't give you an error after 1min then it should be working.

Hopefully someone with a greenrich can let you know what setup they have for comms wrt pinouts and dip switch settings if that doesn't work.

@jumperhas some very good points, sadly I am also not too familiar with Greenrich but I know Voltronics. Just to add on to the RJ45 cable PIN configuration. After checking the manual for the battery, your PINS seem fine but you should have wires in pins 4-8 on the battery side and the invert should have cables in 3,5,6,7 and 8. If you already have the RS485 and CAN both wired with 5 strands on each side please ignore me, but I know a lot of people think you need to wire one or the other but both should be done to limit frustrations during setup. Plus it sounds like the PIN config will DC anything unnecessary with resistance if configured right so hopefully someone else will be able to0 confirm what's the right DIP config.

 

Otherwise, "User Defined" works using the voltmeter (Which can be a little hit or miss) and that is how the inverter works out SOC etc. So user defined should work normally but it can give you some odd readings...

 

Hi guys, resurrecting this thread. I have the same issue - no communication between Greenrich U-P5000 and RCT/Voltronic Axpert Max 8kw. Just installed Solar Assistant today and using Emulate BMS mode to at least try get an 'accurate' reading of battery capacity. Battery to Solar Assistant cable on the way which will give me real-time data on battery state. But I SHOULDN'T need to jump through all these hoops if the installer supplied the correct comms cable between the battery and inverter in the first place, right? (Or was even aware that you needed one...)

This shouldn't be rocket science and yet it feels like it is...

I also wish my inverter supported solar energy priority (so I could direct PV power to charge the batteries first and fill in the load gap with the gird until the batteries are full), but alas, I didn't know any of this stuff before I bought into the solar system rush.

Edited February 13, 20232 yr by gLer

15 hours ago, gLer said:

Hi guys, resurrecting this thread. I have the same issue - no communication between Greenrich U-P5000 and RCT/Voltronic Axpert Max 8kw. Just installed Solar Assistant today and using Emulate BMS mode to at least try get an 'accurate' reading of battery capacity. Battery to Solar Assistant cable on the way which will give me real-time data on battery state. But I SHOULDN'T need to jump through all these hoops if the installer supplied the correct comms cable between the battery and inverter in the first place, right? (Or was even aware that you needed one...)

This shouldn't be rocket science and yet it feels like it is...

I also wish my inverter supported solar energy priority (so I could direct PV power to charge the batteries first and fill in the load gap with the gird until the batteries are full), but alas, I didn't know any of this stuff before I bought into the solar system rush.

You are correct that it shouldn't be necessary to jump through hoops to get your battery and inverter to communicate properly. Ideally, the installer should have provided the correct communication cable and ensured that the system was set up correctly from the start.

Unfortunately, in some cases, installers may not have the necessary knowledge or experience to properly set up and configure a solar system, including communication between the battery and inverter. In addition, some inverter models may not support certain features such as solar energy priority.

Hi - I am also experiencing a fault with my communication between Greenrich battery and Axpert/Voltronic/ inverter. Has anyone had any resolve?