zivva

Right ... Except there is no reason a battery module gets overcharged because the other one would have stopped charging. Batteries BMS limits voltage & current for each batteries independently.
If one battery stops charging, the other one will only accept voltage & current within limits of its BMS. Same for discharging : within the limits of each battery BMS.
If load > battery capacity : use candle. Communication between inverter & BMS does not change the problem ...
The only way to solve that issue aka good design is oversizing. If ever batteries may develop such issue ... Which is unlikely when the only job of a BMS is to not allow over or under charging or discharging.

Go to basic settings
Untick "lock out all changes"
Validate and type the password 7777 on the next screen ...

Sorry, doesn't work.
RS485 works with the 2/3 battery side - 7/8 inverter side cable.
Doesn't work with battery set to ID 0 though, need to set to ID 1.
 

Not normal, ask for a replacement

Until proven otherwise by reading those magical & unique cells datasheet,you might need to try harder to convince anyone that those cells are rated for 1.5C discharge.
Meanwhile, one can only assume that those cells are rated as all other LFP cells available on the market : 0.5C @ 25°C. Assuming those cells are Grade A automotive cells. Tested & matched.
Greenrich markets their products as able to achieve 1.5C ... But only recommend 0.5C. That 1.5C is nothing more than some marketing gimmick ...
You are right though, a Mercedes can achieve 280 km/h (well, some AMG can, not sure about the Mercedes :p), but it's not meant to be driven at 280 km/h at all time. If ever that was possible At some point it even needs to stop.
.

Not really, just interested & looking for more informations then facts.
Facts at this point are :
- Greenrich does not produce any battery but use the services of a Chinese OEM : Greenway. Nothing wrong with that, it is how technology works these days. Greenrich does not try to hide it : it is written on a sticker of your products & the PDF you attached.
- Greenway (because at this point, Greenrich is nothing else but a marketing brand put on a sticker ...) does not produces battery cells but assemble battery packs using third party cells. Both for NMC & LFP markets :
https://www.greenway-battery.com/about.html
 
Awaiting a datasheet to back up Greenrich marketing statement but looking at the photos you presented in your PDF, here are the specs of the cells you presented : 
https://www.haicenpower.com/products_dt/31.html
3000 cycles @ 100% DOD, 6000 cycles @ 80% DOD. Both ar 0.5C / 25°C per industry standards.
So ...

Somebody tried to bad mouth of Greenrich

If you want to reduce deviation between batteries in //, the only way is using bus bars and batteries wires of *** exactly *** the same size and length, terminated with the exactly same lug with the exact same contact area, torqued at the same strength.
Otherwise ... Electricity will *** always *** follow the path of least resistance : more energy flowing thru the shorter (then less resistance) cable, or with the less contact area etc ...
When I say exactly the same length of cables : millimeters matter
Is it worth the effort ? Probably not for "only" 3 batteries ...

Got the data sheet from the manufacturer of those cylindrical 1.5C / 6000 cycles cells or is it just a marketing claim ?
The problem with high C-rate (anything above 0.5C being the standard in energy storage industry) in general not being only degradation due to temperature but also mechanical stress on electrode particules.
Any case, Greenrich brochures mention "for better battery life, we suggest charge & discharge @ 0.5C @ 25°C" 🥳

Yes, you're right. Victron have no clue about how batteries work! I really have no idea how they have managed to stay in business for about half a century, most of that time as a leading vendor in that market. But not to worry; I'll forward them your URL so they can ask this blogger in Denmark to explain it to them. Once they do that, I'm sure they'll change the software in their products accordingly.
 

There is no reason to only charge your batteries to 90% instead of 100% ...
The less you charge them to the point they get balanced at the end of the charging curve (> 3.5V), the more unbalance you create and the less accurate the SOC gets estimated by the BMS.
If you want to improve battery life, you can choose to only use x% of their capacity but cycling from 100% to 40% is better for the reasons given above than from 90% to 30% ...
Any cases what matters is cells being in balance at 3.5V (> 99% SOC). Only garbage cells are out of balance @ 3.3V (SOC = 30% to 90%, middle of the flat curve, impossible to be precise)

There is no reason to only charge your batteries to 90% instead of 100% ...
The less you charge them to the point they get balanced at the end of the charging curve (> 3.5V), the more unbalance you create and the less accurate the SOC gets estimated by the BMS.
If you want to improve battery life, you can choose to only use x% of their capacity but cycling from 100% to 40% is better for the reasons given above than from 90% to 30% ...
Any cases what matters is cells being in balance at 3.5V (> 99% SOC). Only garbage cells are out of balance @ 3.3V (SOC = 30% to 90%, middle of the flat curve, impossible to be precise)

When the battery reaches the disconnect level it just disconnects and that why the sudden drop to 0% SOC and bounced back when the BMS reconnect. 

From personal experience with a Pace BMS :
- the Battery Charge Voltage displayed & used by Deye is Pack OV alarm set on the BMS : should be 56V in your case then. No idea where comes from your 57.6V that doesn't match any of your BMS setting ...
- the Charge & Discharge current limits are equal to 95% of the CHG / DSG OC alarms
As most BMS these days, SOC is reset to 100% when either 1 cell reaches OV alarm OR pack reaches OV alarm.
That explains why your SOC jumps from 90% to 100% If your cells are unbalanced ... with a cell OV alarm set too low (3.50V)
Maybe try those settings :
Cell OV alarm : 3.65V
Pack OV alarm : 56V 
Unless your cells are totally out of balance, that should leave enough time for the pack to reach 56V without a cell reaching 3.65V first then producing a SOC jump ... and increase cells unbalance in the long run ...

My understanding (could be wrong, is only what I have picked up in the past on the forum) is that the manually set voltages are fall back settings to be used in the event of a comms failure between the Inverter and BMS and that the battery BMS usually controls all the voltages.

As long as both Pace, they will communicate between each others out of the box. Getting the exact same firmware for both should not be needed.

If 2 inverters working independently, you can have different models of inverters & batteries, no problem ...
If you plan to use the 2 inverters in //, you need the exact same model & firmware on both.
Then all batteries should be controlled / connected to the master inverter. For this, 2 options :
- use batteries with the same voltage / cells count & same brand of BMS (typically Seplos or Pace. Meritsun uses one of them) for the batteries to be able to communicate with the inverter & between each others.
- use batteries with the same voltage / cells count but different brands of BMS with no com between inverter & batteries but using voltage settings. No problem whatsoever as long as you know what you are doing about the voltage settings.
 
 

Batteries should reach 100% SOC on a regular basis for cells to be balanced that typically occurs after 3.4V.
When only charging to 70%, cells will remain around 3.25V then never be balanced. Expect more & more unbalance in the long run ...
What matters is the DOD : from 20% to 70% or from 50% to 100% doesn't impact battery health but cells balance.
The less DOD, the longer the battery life. 10 years of cycles life vs 15 years at best. To put in perspective vs how much would you save by using 100% of the energy stored vs only 50% ...

It's parallel connection here, not series.
Manufacturers generally forbid the use of other batteries with theirs ... As they want to sell you their batteries 🥳
Still they have no way to tell if their battery has been used with another one ...

It's parallel connection here, not series.
Manufacturers generally forbid the use of other batteries with theirs ... As they want to sell you their batteries 🥳
Still they have no way to tell if their battery has been used with another one ...

Here is the software for Narada equipped with a Shinwa LM-M01A BMS.
You will need :
- battery dip switch set to ID 0 (all down) or first battery ID 0, second battery ID 1, etc if you have multiple batteries :
- RS485 communication cable : standard RJ45 connected to the RS485 port of the battery, pins 2 & 3 connected to the USB converter.
I'm using successfully an RS485 to USB converter with an FTDI chip (see picture) for both using the Windows software or connecting a PI to use Solar Assistant
 

LM-M01A-ND574_200805.zip

31° is absolutely not an issue but is more or less an expected temperature when charging. You could start to worry above 40° ...

Actually found it :
- yellow pin 4, RS485B
- black pin 6, RS485A
- red pin 8, ground

Looks like the one
You have 3 wires on the cable : RS485A, RS485B, ground ... Red, black & yellow. Can't remember exactly what colors do what though 😂 but I still have the EPEVER wiring diagram, just check the RJ45 end to match. No need for the ground ...

Here's the temps from Solar Assistant.
The MOS temperature is the "ambient temperature" when checking with Seplos software ...
Charging @ 100A, temperatures a bit high 😂