Pylontech Image

Pylontech

Pylontech und CCGX

Hallo zusammen,


ich habe das Problem das mir meine 4 Pylontech Akkus nicht im CCGX angezeigt werden.


Konstellation ist:

Multiplus 2 48/5000

MPPT BlueSolar 150/30

CCGX

Solaredge SE7K


Verbunden habe ich den CCGX und die Pylontch mit dem vorgegeben Typ B Kabel von Victron.

Im CCGX habe ich dann die Geschwindigkeit des BMS auf 500kbs gestellt, also alles so wie es sein soll, aber leider werden die Pylontech nicht erkannt.


Hat jemand das selbe Problem, oder hat vielleicht eine Idee woran das liegen könnte ?


Das Kabel habe ich auch schon einmal getauscht, das sollte es nicht sein.

Die Firmware vom CCGX, MPPT (über VE direct) und das Bussystem von Multiplus (474) ist aktuell, ein umstellen auf die vorherige Firmware beim CCGX hat auch nicht zum erfolg geführt.


Bin für jeden Tip dankbar !


Grüße


Daniel asked
mikemax answered ·

4 Answers

ESS: Can Pylontech batteries limit inverter output during day when SOC 100% and loads run off solar?

The site has a 7200w solar array.

20 x 360w solar panels

250|100 MPPT

CCGX

2 x 5kva MultiPlus II inverters in parallel.

3 x US3000 PylonTech (under Victron recommendations)

It is an ESS system. (Optimized with Battery life)


after SOC is 100% , when consumption goes >2500w in the day, the panels don't cover the consumption. Can this be because of the continuous discharge rating of the Pylontech batteries? or is this not the issue?


[image]

[image]

[image]


@Guy Stewart (Victron Community Manager) @Johannes Boonstra (Victron Energy Staff) @mvader (Victron Energy)

Can you help, been struggling to find the solution to this problem.

jond asked
stenis answered ·

2 Answers

Inverter maximum battery capacity

Could someone be so kind as to tell me the maximum battery capacity that both the 48v 3kw and 5kw multiplus inverter charger can handle? (Intend I’m using Pylontech 48v us2000).

Merlin asked
Merlin commented ·

2 Answers

Quatro 15KV, MPPT 250/100, CCGX Pylontech Batteries on 51% low battery alarm on Quatro

I got a low battery alarm on the CCGX V257

[image]

The quatro V433 is longer function and the state is FAULT

[image]


I tried to reset the system a few times, no luck

Batteries look okay


Please advice

sytze asked
Alexandra commented ·

0 Answers

Why am I not getting the expected kWhs from Pylontech?

Hi I have a job with 6 pylonTech U2000 connected to a MultiPlus 48/5000/70-100 Firmware 459 and Venus GX Firmware v2.60~35. There is a grid meter, 5kW of fronius solar on the output and 5kW of solar on the input to inverter. I have a number of battery issues that could be related and was wondering if anyone had some Ideas.

1. The GX is telling me the charge current limit is 100Amp But if change Current is 25Amps per battery this should be 150Amps. I have tried multiple times and ways to detect batteries but no luck getting the 150Amp limit. is there another way to see what has been detected by the GX?

[image]

2. The batteries will not charge at more than 40Amps. Excess power is been exported insted of going into battery so battery is not fully charged some days. What could be limiting charge current?

[image]

3. In the ESS I have minimum SOC Set to 0% but the VRM is showing they only discharge to 20%. What could be stopping discharge to 0%? (have tried setting at 10% and 5% but same result)

[image]

4. From a indicated 98% to %20 SOC VRM is telling me I am getting best case around 9.5kWh form the battery a day. if the usable capacity of the pylonTech U2000 is 2.2kW I should technically getting 10.5kWh to 20% SOC from 6 batteries so I'm 1kWh short, Is this normal? But alternatively if I only have 4 batteries as indicated buy the charge current limit I should only be getting 7kWh a day. so it looks like I'm doing better than 4 batteries. Is there another way to tell if all the batteries are working OK?

[image]

Thanks in advance for any tips on these points

Cheers Jon.

Jon_Lowbank asked
Jon_Lowbank commented ·

3 Answers

System overview - Multiplus II + Pylontech US2000 + Fronius Smart Meter + Fronius Inverter Symo + Raspberry (venus os)+ excess feeding

hi all,

I´m planning to install an ESS with the components listed above.

Has anybody realized this configuration already and may support me or has an overview/schematic?


regards,
Thomas

hansbaer asked

0 Answers

Pylontech warning low temp after internal faliure

Hello,

I got this now three times during the past four weeks. Suddenly there is a Notification / alarm when the Pylontech batteries are almost full.


[image]


It starts with a "simple" Internal failure at 12:03 and after some time it is followed by a low temperature warning, today with 23.7°C ;-) followed by a second internal failure alarm at the same time.

Any ideas? Can I try to find it out what happened and what caused it.

[image]

In VRM it shows some more information

Battery Monitor [512] Automatic monitoring Internal error alarm: Alarm 2020-06-18 12:18:19 3m, 46s




I think it might be a sort of communication problem. The pylontech batteries doesn't show any Alarm LED or any other sign of problem. I am still running a release candidate firmware 2.60~23 and there is a some how newer version with 2.60~25 available, but in understanding never change a winning team, if not neccessary, I hope I get some advises here.

I looked at the monitoring during this time

[image]



Here some more detailed screenshot from VRM for battery information for 12:03

[image]


and for 12:18 when the second alarm notification occurred.

[image]

But I couldn't see anything really spectacular. Perhaps it might be interesting that the Pylons BMS changed exactly at the first point of time the CCL down from 80A to 20A.

Any ideas, what I can do to follow the alarms and to find out what did it cause?

Any help is welcome.

DayAndNight

DayAndNight asked
DayAndNight answered ·

3 Answers

MultiPlus-II 48/5000 Low Battery

I have Pylon batteries connected to my MultiPlus-II 48/5000.

The batteries are fully charge at 53V and I did set the MultPlus-II settings as stated in the Victron & Pylontech US2000B Manual, VEConfigure Settings.

The Multi Battery LOW RED LED is flashing and if I disconnect main, the Multi switch off after 30 seconds because of low battery even if the battery is still 53V.

What am i missing??

Hugo_Russouw asked
rnieckau answered ·

2 Answers

3 Phase Multiplus-II system with Pylontech dead after some days

I am fighting with a new install.

Venus GX, 16pcs pylontech, hub, venus, 3x multiplus-II, grid connected
Due to distance to the farm entry where i have the ET340, i use external control and Modbus/TCP to control the system.

The system worked for some days, but strangely the FI in the pumphouse (quite far away) started tripping in the night with no obvious reason, might be unrelated.

Now the system is in error state, "grid relay fault", it constantly throws the SMA solar system off-grid when it tries something, and shows error codes on the multipluses which are not documented. My installer has no clue and things "some problem down the line" but there are no changes and the system worked for some days without any issues.
Hardware defect in the Multiplusses ?

Problem got worse because the Pylontech batteries where pretty discharged and used the rest of the energy to power themselves (and possibly the Multiplusses ?), so now they are "dead", the can hub from pylontech is "dead" as well as it feeds of the 48V of the battery.

I am lost and currently my installer seems to be clueless also, he thinks it is probably my problem as i use external control (ESS mode 3) ...

here a short video of the error blink codes of 2 multiplus, the third one does the same as the right one.

https://www.dropbox.com/s/n7sc9zvfuv6fh5b/IMG_4812.MOV?dl=0


HELP, please. I have now cut the multiplusses from the grid so that at least the solar production works and is not constantly thrown off.

Johannes






jacola asked
dgnevans published ·

3 Answers

Do I multiply charge current with the number of batteries for Pylontech?

The Pylontech US2000s recommended charge current is 25A. I am using 4 on this system. Do I make the charge current 100A (4 x 25A) in VEConfig ?


The max of MPII & Quoattro 48 is 70A? so then should it be set to 70A?

[image]

jond asked
Alexandra answered ·

1 Answer

Phoenix Inverter + Venus GX + Pylontech/BYD?

Hello I have a client who wants to purchase a Phoenix 3000 Smart Inverter, they currently have a 48V battery bank. If my client purchases a GX device such as the Venus will they one day be able to upgrade to Pylontech or BYD batteries even though the Phoenix 3000 Smart uses VE.Direct and not VE. Bus like the multiplus?

I found the below link in the community but the answer was about the multiplus not about the Phoenix.

https://community.victronenergy.com/questions/26738/is-it-possible-to-use-pylontech-batteries-with-mpp.html

I'm assuming the answer is *no* since the below link says all VE. Bus Inverter *are* compatible.

https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom


SparkPoint Solar asked
Powerboy commented ·

3 Answers

Guidance on Multiplus II 3000 fuse and wire for Pylontech batteries

Hi,

Little confused about battery wire requirements and fuses for using the Multiplus II with Pylontech batteries. It would seem that you have to use Pylontech branded cables as the batteries have a proprietary connector on one end to go into the battery. I can see in the manual it recommends 35mm2 cable and a 125A fuse. My dealer gave me a 200A fuse, I read on here, someone else had their distributor give them an 80A fuse. Confusion number one!

Confusion number two, I can't see what the cables provided by Pylontech are in terms of thickness, there doesn't seem to be a rating on them. But like I say, they have a special connector on them so it would seem you have to use them? Confusion number two!

https://www.ebay.co.uk/itm/2m-Long-Cable-set-Pack-Pylon-PylonTech-US2000-Plus-US3000-Phantom-Solar-Battery/253792544671

Then finally, I have seen two installers here in the UK, who don't have a breaker, isolator or fuse on their installs between inverter and battery. Mind you, one of them also puts the batteries below the inverter, which the manual pretty clearly says not to do! Confusion number three! See pics.

Any help advice, particularly from someone who has Pylontech batteries would be much appreciated.

Many thanks,

Gareth.

[image]

[image]

garethcurtis asked
Rob Duthie commented ·

4 Answers

Strange charging behavior, limited power with Pylontech

Hi,

My system consists of Pylontech US2000B Plus 2.4kWh Li-Ion Battery 8 Modules, Quattro 48V/8000VA/110A-100/100/230V, SmartSolar MPPT Charge Controller 250V/100A-Tr with Pluggable Display, Venus GX and 16x Solar Panels ERA 400W PERC Monocrystalline 24V.

The panels are connected in 4 groups of 4, Then into 2 groups of 8. These groups of 8 are independently switched.

I have a strange situation with charging, I never seem to reach any more than about half of what the panels can produce. So I switched off all the panels until the batteries were at a 30% SOC then waited until the sun was at solar noon. Then I switched on one group of 8 and the charge controller display gave a reading of ~2500w. Switching of this group and then turning on the other group also gave reading of ~2500w. Now this is the strange part, when I have both the groups turned on I still only get ~2500.

Have I missed something in the settings?

Any advice would be gratefully received.

Tony

Tony asked
Tony commented ·

1 Answer

Pylontech UP2500 CAN Version - High Voltage Alarm

Hi There

My system is getting "High Voltage warning message" when set to "Keep batteries charged"

I am using the latest firmware on the multi and on the venus.

[image]

[image]

[image]

[image]

I followed the instructions on the below link.

https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom

Please let me know how we can get this issue resolved my system is connected to the vrm portal ad remote support is enabled if needed for debugging.


Regards

Andries

ajm asked
Daniël Boekel (Victron Energy Staff) answered ·

1 Answer

US3000 not shown on venus

I have installed 3 x Pylontech US3000 an a Venus GX device. CAN Bus BMS is sset according to https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom but I don't see y pylontech entry on venus. I checked the wiring of the can cable as in https://www.victronenergy.com/live/battery_compatibility:can-bus_bms-cable all OK, terminator set. What can be the reason that the battery is not shown on venus?

Do I have to set anything else? Are there any settings on multiplus needed that the battery is shown?

nemo5 asked
nemo5 commented ·

2 Answers

Off-grid configuration Multiplus II + Pylontech battery + generator

We are building full Off-grid system for cottage located in Lapland.

I'd like to ask you some advices on the equipment I selected:

Item Qty
MultiPlus II 5000VA 48V 1
48V Pylontech US3000 Battery 2
SS mppt 100/20-48 + 2x 270W panels =540w 1
SS mppt 10/20-48 + S2 x P2 x 270W panels = 1080w 1
one more solar a. 3000w next summer when cottage is completely ready 1
Cerbo GX + GX gsm 1
Diesel generator 3,4kw real power with full automatic 1

Cabin is locat in the north of Finnish Lapland. Middle of winter there’s two months without any sun and generator will make all the electric. Hole system will be kept +7’C or above.

Network control is essential. Is there everything we need on to list? Will everything work together?

The plan has been made for improvements. All suggestions are welcome.


Above the Arctic Circle asked
Mikael answered ·

1 Answer

Pylon Tech shutting down my system

I have a single phase system with 2 x Mulitplus II 5000's and 8 x US3000 Pylon Tech batteries.

The Pylon BMS seems to hit a standstill at 88%, glitch???

The system started shutting down sporadically without any fault indication or errors reported.

I looked into it and saw that the systems charges up and when it gets to 88%, the SOC doesn't advance but current is going into the batteries, it then jumps up after a while to 96%, so it seems the SOC is not reporting correctly in this time. This is happening every day, but once in while the whole system will shut down in exactly this time period for a completely unknown reason.

[image]


This is the typical scenario when the system shuts down:

[image]


There are no errors or notifications I can see of why the system turned off.

Also of concern is that the max charge and discharge currents show under battery parameters are 296A, indicating the data for 4 batteries and not 8. This was like this before I installed the hub and after.

I spoke to a local victron support agent and he said he had the same issues on a site and installing a Pylon Tech LV communication hub sorted out his problem. I installed the hub and everything seems the same. The max charge and discharge currents are still 296A and the system still get's stuck at 88% and the very next day the system shut itself down again without any fault indication.

The hub seems to be working correctly as it's showing a blinking light on the second light, indicating 2 connected banks, all 8 Pylons are all flashing lights in sync.

[image]

The DVCC settings are as follows:

[image]


The only thing I changed is that SCS - Shared current sense was OFF, I turend it ON to mach the settings that is working fine in my BYD system. I did that today after this last system failure.


I have many sites running with Pylon's and GoodWe hybrid inverters that haven't given me a day's problems, I also a have a 3 phase site with Multiplus II's and 3 x BYD 11.8 B-Box's that is running perfectly.


I really need help understanding how to solve this issue.


Thanks

Andries

Andries van den Berg asked
Daniël Boekel (Victron Energy Staff) commented ·

2 Answers

Pylontech US2000 x2 && Multiplus II - SOC never reaches 100%

Hi, any explanation why my two US2000 do not reach 100% even if at 3pm the excess of PV-generated energy already goes to the grid. Is this normal/on purpose.
Typically it ends at 99% - but never goes to the final 100%

Thanks if you have an explanation or idea why it behaves like this

njordan asked
Alexandra answered ·

1 Answer

Pylontech Remote Console - Details missing (?)

I finally bought/received my VenusGX, Multiplus II, 2xUS2000 hardware. Did build it up and now already balancing arround 0W during night hours....so highly pleased.


BUT - i do not see any details about the Battery in the remote console, Any Idea what i did wrong, or why i cannot see anything more.....what would be highly interesting to see :-)


[image]


[image]


njordan asked
njordan answered ·

2 Answers

Not seeing Pylontech US2000B (Battery Monitor) in device list

Hello,


I have the following equipment installed:

1 x Quattro 48/8000 230V

2 x MPPT Smart Charge Controllers 250/100 MC4

8 x Pylontech US2000B Batteries

1 x Venus GX


The batteries are connected to the Venus through one Can port using the VE Can Cable Type B and the dummy plug is inserted in the other port. However, the Venus isn't recognising the Pylontech, it isn't shown in either the device list for the installation (usually shown under battery monitor) or in the device list section of the remote console.

Can-bus profile is set to Can-Bus BMS (500 kbit/s) and DVCC is enabled. Venus is on firmware 2.31 and Quattro is on 459.

Battery monitor under System Setup is set to Automatic but it appears to have auto selected the Quattro on VE Bus and the BMS is set as Off and doesn't give me the option to change it.


Please help me to enable the Pylontech BMS to act as the battery monitor.


Thanks


Hindssight asked
nemo5 commented ·

3 Answers

Pylontech UP2500 connection to Venus GX

I have 4 pylontech UP2500 connected to a VENUS GX and Smartsolart MPPT 150/60. On Victron connect I see a battery percentage on the top level but no battery appearing on the device list. The Smartsolar does appear, as does the Multiplus 5000 inverter. should the battries connect to the Venus GX via the Victron CanBus BMS TYPE B cable or should the batteries connect directly to the inverter using this cable? Help please.

jhass1 asked
nemo5 answered ·

3 Answers

Can I connect more than one BMS to the Venus GX?

I'm trying to connect 2 batteries from 2 different suppliers

  1. A pylontech battery with a builtin BMS that connects directly to the Venus GX https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom
  2. An additional battery with a separate BMS that can also connect to the Venus GX

Can I connect these 2 batteries (through their individual BMSes) at the same time to the Venus GX?

How does the Venus GX manage 2 BMS inputs?

BTank asked
BTank edited ·

1 Answer

SmartSolar MPPT not chargin Pylontech battery

Hi,

I have:

  • Cerbo GX
  • MultiPlus-II 48/5000/70-48
  • Pylontech battery
  • SmartSolar MPPT VE.Can 250/85 rev2

And I set it up for ESS:


And I think most of it works. But the MPPT is not charging the battery. I have no idea where to look for the problem. There are so many settings. Maybe someone can help me. A few screenshots:

[image]

[image]

[image]

[image]


I am happy to provide more information but I am not sure what is helpful.

There are 4000W of solar panels connected. Which works. They were on another inverter before. But it only shows something around 20W now? Strangely it is not 0?

ebber asked
Daniël Boekel (Victron Energy Staff) answered ·

4 Answers

Issue connecting an Easysolar 48/3000-35-50 with Pylontech US2000 (2x) BMS

Followed the " Victron & Pylontech UP2500, US2000, US3000, Phantom-S & Force-L1" instructions and used a made (& tested) cable according to the "VE.Can to CAN-bus BMS cables manual" and have no apparent comms between the Color Control GX (firmware version) and the US 2000 master CAN RJ45. The Pylontech US 2000 is operating as "normal"and the batteries are fully charged. Just upgraded the MultiPlus 48/3000/35-50 to firmware 473. DO not see the Pylontech in device list.

linpe05 asked
linpe05 answered ·

5 Answers

Building three phase ESS with Multiplus 5kW and Pylontech

Hi,


I am planning to install a ESS system according to the simplified schematic below combining 3 x Multiplus 5000VA for timeshifting energy and occasional backup duty. I hope I have gotten it right!


So my questions are,

1. What is the minimum battery requirement with Pylontech US2000 Plus batteries for this system? The Victron guide on Pylontech only covers off grid use which is more demanding compared to ESS. A breakdown of the requirement would also really help so I can think for myself next time :) Inrush currents have been mentioned before but I cannot find any numbers to base my decision on.

2. Can I add more US2000 Plus modules several years later even if they have different state of health?

3. Can I add other battery types in the same installation?


[image]


Regards,

Sven F

S_Forsberg asked
Guy Stewart (Victron Community Manager) commented ·

4 Answers

ESS + Pylontech + MaxDischargePower is not what I expect?

Hello,


I have a question how to understand the MaxDischargePower in an ESS context.

In my setup I have
- 2 Pylontech US2000 on a Multigrid-II
- not limited the inverter power on the Multigrid
- 50A Discharge Current Limit on the Pylontechs

and with this I see a "MaxDischargePower" on the MQTT service of +/-1949 W where my expectation would be somewhat higher around 2400 W.

It seems that this value is dynamically determined since it changes slightly when polling multiple times.


Thanks for any helping answer - kind regards - Volker

Volker asked
Volker edited ·

4 Answers

Comments on design and sizing?

Hi Everybody,

As it happens, my design is very similar to the example given by Victron in the Pylontech manual. The main differences are that I am using two MPPTs and two Quattros (instead of one MPTT and a Multiplus) and I have many PVs (up to 40 panels). So I have "stolen" the Victron schematic drawing and modified it accordingly. Now the questions:

1. Does the design make sense? It's for self-consumption. i.e use solar and batteries as the main source of power, with the grid as back-up and to keep the batteries topped-up.

2. I have ordered for eight Pylontech batteries (US3000). Following the advice of @DayAndNight and because the long (2 metres) Pylontech cables carry a maximum of 120 amps, I have decided to keep the batteries separated in two groups of four. I couldn't find anyone to make cables that carry more current. Moreover, the Pylontech BMS most likely limits the current. I plan to buy eight more Pylontech batteries. The plan is also to put these in two groups of four, so that I have four groups of fours. No question here.

3. I know where to put fuses, but I'm confused as regards the volts! According to various Victron documents, one should get a fuse ideally equal to the system voltage (in my case 48 volts) or the nearest higher equivalent (in my case 58 volts) and the relevant current rating in amps. But according to various websites including Littelfuse, a fuse can only protect wiring or equipment at its stated volts and amps. One should therefore get a fuse at the rated amps and volts (expected volts, not merely system volts). In my case, just one MPTT can output 250 volts and each of my batteries can output 58 volts (remember I have 8 batteries, potentially 16), all obviously more than the 48-system voltage. Most of the fuses go to 150 volts. There are fuses rated to 600 dc volts, but they cost more than 100 US dollars. Moreover, there are specifically-rated photovoltaic fuses which cost even more. What should I get?

4. The same question applies to busbars. Most busbars are not rated, some have amps but no volts (like Victron's) and the rated ones, at least in the US, go only to 150 volts (Blue Sea). I can get a busbar of 1000 amps quite easily, but low voltage. What should I get? I will be dealing with about 1000 DC amps and 1000 DC volts in the busbars as distribution points.

5. The Lynx Ion manual says you can get two Lynx Distributors only but it is quiet about the Power-in. Can you get two Power-ins (without the Lynx Ion shunt and without the Lynx Distributor) and use them as fused "distributors" instead? Do the Lynx Power-in and Distributor really have two busbars each? From the images, I see one "red" fused busbar (positive) and a would-be black (negative) busbar eaten up by space for wires and fuses for the positive line.

6. In terms of communication, the plan is the two MPPTs and the two Quattros to talk to each other and to the Pylontech BMS through the CCGX. The Victron schematic suggests this is possible though some of the manuals say otherwise. Is this possible? (I guess "yes"). Should I wire my loads to the first or second or both Quattros? It doesn't matter to me how they are wired provided they can monitored through one CCGX.

Thanks. Sorry for the many qurstions.

Fideri

Fideri asked
Fideri answered ·

2 Answers

Behavior of system in cold weather

Hi


I am trying to understand how cold weather will affect the system.


Venus GX
SmartSolar 250/100
BMV-712 Smart
Smart BatteryProtect 48v-100A
2 Pylontech US2000


How will the system behave if cold for the battery to charge or discharge. I assume that the BMS will tell the Venus GX that in turn controls the SmartSolar to stop charging the battery.


So down to my question, will we still be able to run DC loads direct from the SmartSolar that is connected in parallel to the battery (when the sun shines of course) without this conflicting with the battery charge or discharge?


Or will all power from the SmartSolar be stopped?


Mikael asked
Jesus Mazo answered ·

2 Answers

Can I install a Pylontech battery in a vertical orientation?

Hello Sirs,

Question...., is it possible install Pylontech batteries upright position, so that all connections pointing to the sky ? I checked from the manual, but no info. Sideways installation is ok, so I guess upright as well..... but im not 100% sure.

I have a big battery rack, but it is too big and high. ....and it eat all extra space from my cabinet, so I would like to remove it.

[image]

Thanks, :)

Kimmo Paukku asked
Jan Zmrhala answered ·

2 Answers

Fine tuning and expierence with Pylontech batteries

Hello Victron universum, hello Pylontech Users!

I run an ESS system with 8 connected Pylontech US2000B+ for more than six weeks and it works very perfect from the beginning with the parameters Victron recommend.

[image]

I read a lot of threads connected in Pylontech batteries questions, facts and ideas. I still have many questions and things I don't understand and I try to puzzle it out. I think it might be helpfully for the community if interested Pylontech users share and collect their knowledge and their experience here in a thread.

Many of the questions here in the forum are directed to how many units should be used as minimum? There are two documents from victron which gives guideline for this:

  1. Victrons document about Pylontech
  2. Victrons document AC-coupling and the Factor 1.0 rule

By observing my logfile I found one fact interesting for the question how many units are necessary, too: CCL - Charge Current Limit I never have seen be addressed here and it might be important in understanding how many units would be useful as minimum set. As running a set with eight units this parameter CCL is normally set by the Pylontech BMS to 8 x 25 A to 200 A current in my installation.

[image]

I found regularly, almost every day, when the batteries are around a SOC level 88%, 89% that following combination of three facts occur in a very, very small gap of time:

  1. During charging the battery, increasing temperature, quite normal I think, but it has the highest value of all the day, a peak of 1°C higher as rest of the day for a small time period starting in this moment
  2. DC voltage suddenly goes higher than 51.0 V. As having only a little know-how about charging batteries I don't understand why? Might be based when changing from bulk -> absorption?
  3. Charge current goes down from 60 A, 80 A, 90 A at this moment to low current some as: 4 A, 2 A or 0 A

In this moment the Pylontech BMS reduces the CCL from 200 A to 80 A limit. I guess it is per unit 10 A. This limit is than over many hours until night valid. I think this is triggered with one of the above three facts or might be a combination of two or all three facts. So in case batteries are later discharged again at this day e.g. -10% SOC and some later charged again, there will be a limitation for charging current and not all available PV energy can be used for charging.

I am wondering what would happen when I increase the number from eight to 10 units, will be this CCL regulation to 100 A as instead to 80 A? Or for people who think to work with a smaller number of batteries e.g. 6 units it will be down to 60 A?

What I want to learn about:

  • Are there other users who made the same or similar notice when looking to the CCL limit during charging process?
  • My batteries are down in cellar in a cool room. But I am sure in high summer temperature will increase some °C.
    • Will higher temperature have a direct influence to the described CCL limitation?
    • Earlier in time?
    • And perhaps higher temperature will have a limit lower than 10 A per unit?
  • How much self cooling is necessary and helpfully for CCL limit?
    • Distance between the Pylontech units?
    • Number of units in closed housing?
  • How and where did you install your Pylontech batteries? I use a server cabinet which is quite good ventilated, very stable and can be easily moved because it is on rolls. And as having view space in my solar room this is somehow useful for me.

and last but not least

  • I want to understand the parameters setup in VE-Config:
    • It is mentioned there the absorbtion voltage of 52.0 V and I found a recommendation in a discussion here to set it to 51.6V - I would be happy to understand why 52.0 or 51.6 V?
    • What happens technically during the absorbtion phase, I would be interested to understand in detail?

As I have still some space in my server cabinet for two additional US2000B+ and as for 10 units it is necessary to use a LV-HUB and divide the 10 units in to two stack, each withfive units.

  • I would be interested if there is somebody out who have already used in a installation this LV-HUB and does it work and can be setup as simply as without the LV-HUB?

I am looking forward to get your feedback, hints, recommendation and all interesting facts around Pylontech batteries.

DayAndNight





DayAndNight asked

0 Answers

123 Posts
158 Users
9 Followers

Topic Experts

Digima
100 Points
Andre de lange
0 Points