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How to charge a Pylontech US2000 with SmartSolar 150/50 ?


is it possible to charge a Pylontech US2000 with a SmartSolar 150/50 ?
What do i need to make communication between Smartsolar and battery ?

Thank you

aquadiscount asked
wkirby answered ·

1 Answer

Intermittent VE Bus state OFF, no warnings. Lost power 30seconds

Any gurus out there have any ideas on this problem?

8kW Quattro, 7 x Pylontech Force 1, 2 x Blue Solar chargers commissioned this week. System ticks away quite nicely then randomly the inverter appears to switch off very briefly. Owner complains of losing power for around 30 seconds. Happened twice yesterday and twice the day before. Can see the event in advanced logging (VE Bus state briefly off) but no warnings generated. Rest of system unaffected. Doesn’t seem to correspond to anything unusual… no large loads at the time, etc. We’ve had storms the last day or two, not sure if this would be a factor. Anyone have any ideas??

timapex asked
dafyddhirst edited ·

1 Answer

Pylontech modules blocking charge / discharge

I have 4 x 3000 pylontech and 4 x 3000c batteries connected together with one of the C models as master. I have noticed on the Venus GX under the Pylontech section that sometimes it indicates that only 4 batteries are online and 4 modules blocking charge / discharge. This mostly happen at night but during the day it indicates 8 modules are online. Is there a problem with my configuration?


ronnie-verhoeven asked
Alexandra commented ·

0 Answers

Pylontech High voltage: 53.96V when DVCC set to limit at 52V...

Good day!

I have an existing Pylontech installation that suddenly started pushing voltages too high.

The only change was ESS set from "Keep batts charged" to "Optimized with battlife"

By returning it to "Keep batts charged" does not help

The errors then started. It seems to be the MPPT not following the set voltages.



All settings were confirmed with this guide:

System details:

  • Venus GX
  • Quattro 48/8000/110-2x100 rev2
  • SmartSolar Charger MPPT 250/100 rev2
  • 2x Pylontech US3000B
  • 3x Pylontech US3000C
  • All firmwares updated to latest when errors started - did not help.

Venus GX settings


(Charge voltage was set here to 52V only as a test, it did not help)

Quattro settings:


MPPT Settings:


Any assistance ill greatly be appreciated!


goose asked
goose commented ·

3 Answers

RS 48/6000 and Pylontech batteries (how many?)

Hello everybody,

I have an offgrid installation with RS 48/6000 and 2x US2000 Pylontech batteries and I am wondering if two batteries is enough.

I can see that Victron has suggestion on how many batteries one needs for a properly functioning system depending on what Inverter/Charger one has. But the latest RS 48/6000 in not on the list!

It would be greatly appreciated if someone can provide any suggestions on how many Pylontech batteries are needed in a system with RS 48/6000.



Oleksandr asked
daniel87 commented ·

2 Answers

Pylontech battery cable spec


Can someone please clarify the following:

The Pylontech 2m external power cables (both + and -) is labelled 4AWG. The Pylontech US3000 manual (page 12) rates this as a 120A cable. AWG 4 translates to a 21.2mm2 cable with a current carrying capability of 70A at 60 deg C. (

A Pylontech US3000 battery (page 4 of manual) has recommended charge/discharge capacity of 37 A. This cable should work fine with a single module. However 2 modules in parallel will double the current capacity while voltage remain at 48V. Are we really using a 70A cable on a 74 A supply source? Obviously the max current per single US3000 is much higher.

The Pylontech cables does not appear to be a copper cable. The wire strands are silver.

Thank you


jeanmc asked
yoki answered ·

5 Answers

Pylontech battery shows as not connected

I have 2 modules of pylontech US2000C and it shows not connected, I cannot see the parameters, in the cerbo GX it is connected to the BMS-CAN with can type A cable. How can I solve see the batteries connected?


mahely asked
mahely commented ·

2 Answers

Pylontech & ESS problem

Good day,

I am having difficulty with my Pylontech & Quattro setup with ESS....

Current Frimwares:

Quattro 48/8000: 2655469

SmartSolar MPPT 250/100 rev2: v1.46

Venus GX: v2.52

The installation was done precisely as described here:

Current ESS settings on GX:



BUT with the above settings, the ESS runs like this:


When I set the Minimum SOC to 90% for example, the ESS acts like this:


Disabling "Feed in excess solar" also works but only when I had the minimum SOC to 90% for example:


It seems like when the battery hits the minimum SOC, it prevents the MPPT to work....

Thank you in advance!

goose asked
goose answered ·

3 Answers

Please Clarify the Victron-Pylontech Compatibility Manual for me

I read the Victron-Pylontech Compatibility manual. Every page. My conclusion is that I just hook my batteries to my Smart Solar 250/100, Multiplus 48/5000 and CerboGX; and the Pylontech BMS and the Victron system takes care of everything automatically. No setting of parameters required via VEConfigure as long as I've updated all my Victron components with the latest firmware.

I have 4 Pylontech US3000 batteries in parallel, and according to the Victron-Pylontech Compatibility manual, I dont even need to adjust the dip switches on the batteries.

Are my conclusions correct? If so, why does the manual have all the sections about configuring with VEconfigure and VictronConnect if everything is automatically configured already?

agroventuresperu asked
Matthias Lange - DE commented ·

5 Answers

Pylontech (with needed ESS?) in an offgrid-installation


in the Victron product compatibility-list the pylontech batteries are listed to only can be used in an ESS-system. I think this is necessary of the CAN.Bus-Communication. This means that communication only works with the ESS assistant (why)?

I have to wait further 6 months for grid-connection to be built. For that time I want to build a small DC-Coupled PV and a Multiplus with Pylontech-Batteries. A big AC-coupled 30kWp-PV will follow next year. Since I wanted to install a Victron-ESS anyway I am wondering if I could use the pylontech also in an offgrid installation until the grid is ready?
Alternatively I wanted to install the ESS-Assistant offgrid and hoped i can use the pylontech without discharging them to 0% when grid isn't available at no time. I also don't know if a generator would be accepted in the AC-In then when a grid code has to be chosen.

I red that ESS shouldn't be used in an offgrid-installation neither. I know that ESS doesn't make sense in that situation, but it has du be used to use the pylontechs?
So is there a solution to use these components until grid will be available?

Thank you!

porcini asked
christian-valdivia commented ·

4 Answers

Victron Multiplus 5000 24v 120A and Pylontech UP2500 24V Batteries

I have the above inverter with Rolls 5000 6CS25P batteries (supported with PV panels) which are 14 years old and have done great job. I am thinking of replacing them with Pylontech UP2500 24v batteries but cannot find any confirmation that they are OK with Multiplus as above. All advertising notes them as suitable for backup or UPS but not for daily cycle solar power. My alternative is to get a new 48v Multiplus, which would be a shame as this one is only 3 years old, with the Pylontech US2000B or US3000B batteries. Any thoughts much appreciated.

jhass1 asked
Mike Dorsett answered ·

3 Answers

High charge current warning with Grid feed-in


every day when my battery charges and is at around 97% I get the error "Cerbo: High charge current warning on Battery Monitor". The error clears when the battery is at 100%. This only happens when Grid feed-in is enabled. If I disable this the error doesn't appear.

I think all the firmwares are the latest version available. Feed-In settings see screenshot. I have 4 Pylontech batteries connected to my MultiPlus-II 48/5000/70-48 with 2x SmartSolar MPPT VE.Can 250/85 rev2. ESS.


ebber asked
lukas edited ·

1 Answer

Multiplus II entlädt die Batterien nur bis 97%. Ohne Solareinspeisung MPPT 150/35 wird überhaupt nicht entladen. Gelöst.

Das Problem hat sich mit der neuesten Firmware gelöst!



Ich werde es noch ausgiebig testen und berichten. Die Sonne geht gerade bald unter.

Hallo an alle.Ich habe seit Oktober einen Multiplus-II, Cerbo GX, MPPT150/35 und 3 Pylontech US2000. Auf dem Dach sind je 6 Solarmodule an der Ost- und Westseite montiert.

Alles zusammen funktioniert soweit problemlos. Gedacht ist es als UPS für kritische Lasten (Server, Telefoanlage, Heizung, Beleuchtung, Gefriertruhe). 50% der Kapazität der Batterien reicht für den unabhängigen Netzbetrieb über die Nacht aus, bis wieder Solarenergie zur Verfügung steht.

Der SOC Mindestwert ist ist im ESS auf 50% gesetzt. Das hat aber keinen Effekt! Steht Solarenergie zur Verfügung und ist die Ladung bei 100%, wird kurzfristig die Last aus der Batterie und Solarenergie versorgt, bis der Ladezustand bei ca. 97% ankommt. (49,7V an der Batterie). Danach wird die Batterie wieder geladen. Kommt mehr Solarenergie an , als benötigt, wird in das Hausnetz eingespeist. (Gridmeter soll auf 0W gehalten werden.)Bleibt die Solarenergie aus, wird die Batterie nicht mehr entladen und bleibt bei anfangs 100%.

Ich würde gerne die Batterie über Nacht bis zu der eingestellten Grenze von 50% entladen und erst dann Energie aus dem Netz nutzen.

Das gelingt mir nur, wenn biem Multiplus-II "Netz ignorieren" aktiv ist.(Trennung vom Netz bis eingestellte Grenze erreicht ist) In dieser Einstellung funktioniert das Einspeisen ins Hausnetz aber nicht mehr. Bei guter Sonneneinstrahlung wird der MPTT gedrosselt und ein Teil der Energie geht "verloren", den ich im Hausnetz hätte nutzen können.

Die Firmware habe ich bei allen Komponenten im Oktober aktualisiert.

Ich habe schon zahlreiche Konfigurationen durchprobiert, kann aber den gewünschten Ablauf nicht erreichen. Stehe ich hier selber auf "meiner Leitung"?
Irgenwie finde ich den Einstellknopf nicht!

Für Hilfestellung bin ich dankbar.

christoph asked
Matthias Lange - DE commented ·

3 Answers

How can I prioritize MPPT DC Solar over Generator in Off grid application

Hi community.

I have got a large number of Victron-Pylontech off-grid systems with Smartsolar MPPT installed. The inverters and MPPT are programmed as per the victron-pylontech instructions . As these are off-grid installations with generator, I can not run ESS assistant.

I have realized that when solar power is available but the inverters call the generator because the load is too high, as soon as the inverters sync with the ac source, the inverters take all the charge and the MPPT DC charge goes to something neglectable. When the inverters stop syncing with the AC source the solar power raise again. Needless to say this is not desirable and client not happy with it.

I have seen others threads with similar problem but honestly a lot of ramblings and not really any clear solution.

The questions I think it is very simple. On an off-grid installation (with no ESS Assistant), How can I prioritize DC Solar over Generator?

Jesus Mazo asked
Alexandra commented ·

2 Answers

Cerbo Alarm "Unknown No data Communication Monitoring"


I keep on getting this intermittent alarm:


The system:


Quattro 15000

10 X Pylontech US3000C


Any help much appreciated as the alarm doesn't point to any problem, so I am unsure where to look.

Many thanks,

Obo asked
Alexandra commented ·

0 Answers

US2000B vs US2000C Pylontech batteries

Hello everyone. I've read some people have problems with mixing both. Has anyone tried a system with only US2000C and how is it going with Victron devices?

I also read that they have got rid of the RJ11 connector to use the RJ45 insteaed.


tpwchr asked
Maruis Tegang answered ·

1 Answer

Pylontech SoC jumping Up and Down

Dear Community

Till now, at least for me, the expected behaviour of the Pylontech SoC on the Dasboard Overview graph was a point over time, with little variance within the same hour.

That would result in a graph like this.


However, in latter installations, done with multiple US2000C (and using a LV HUB), the behavior of the systems has a wide range of SoC, that does not correspond to reality.


For sure there is a communication problem, as current SoC moves from 100% to 50% within minutes and then comes back again, and that results in the chart above with the "undefined" SoC.

Another example (another installation also using 18 Pylontech US2000C and the LV Hub):


This one is even stranger, as the consumption adheres to the production, but I will ask for it in a different topic.

Note: it was hard to put the 18 Pylontech working right with the LV Hub, as the communication cabling is different from Pylontech US2000B.


Pylontech type B, use the Victron CAN cable type B.

Pylontech type C, use the Victron CAN cable type A

Which cable is the more accurate for the Pylontech LV Hub, using the new Pylontech type C?

Can you get me a updated manual on this type of installation with multiple Pylontech C batteries?

Best regards and thanks in advance.

Nuno M. G. Santos

nuno-m-g-santos asked
Ned Yu (Pylontech) answered ·

1 Answer

2 Pylontech US2000C charges only with ~ 12,5 A

Good morning,

my two Pylontech US2000C do only charge and discharge with 12,5 A. Also both batteries show CCL and DCL 25.0A. What goes wrong and how can I fix this. The cabeling is OK and checked.

The other eqiupment:
MultiPlus-II 48/3000/35-32 (V 481) , Cerbo GX (V 2.66), EM24

mac asked
Rob Fijn answered ·

3 Answers

Off grid 1 to 1 rule for PV ac coupled solar

Off grid installation

I have currently 8.7kw solar through a Fronius 8.2 primo ac coupled to AC1 out on a 10000va Quattro +
Us2000 Pylontech X 5 batteries. 28kw single phase generator and Color GX to monitor and control with a lynx dc
I have a further 8Kw of solar still to be fitted

Current settings

Fronius limited to 6kw output max (just to be safe - I hope to increase this to 8.2kw after input from this thread)

Generator configured to come on when SOC falls to 20% to protect batteries

Plan - questions

I am considering placing to 8 kw on the dc side with a Victron charger (could you recommend one)

Using the 1 to 1 rule am I right in saying i can safely go up to 10kw of ac coupled solar (possibly by adding a second smaller ac coupled Fronius) note that the actual charger on the Quattro states 140amp as the charging max.
if I put the other 8 Ish solar on the dc side will this have any effect on what I should limit the ac solar too?

I am thinking to add a further 3 pylon tech to the system to bring me up to the 8 max they allow without a separate controller but I read somewhere on Victron that I should have 4.8kw of storage for each 1.5kw of solar - this is an awful lot of storage !? Is there a reason for this ?

I intend to program the Fronius to reduce its output to 50% when the SOC is above 90% to protect the batteries and attempt to stop them going all the way to100%

I am having great results currently running completely off grid - tumble dryer, washing machine, dishwasher electric ovens etc - AND charging an Audi etron but I am trying to organise myself for winter

Thank you for your replies

tas6 asked
shaneyake commented ·

2 Answers

2 pylontech CAN BMS on one Cerbo gx

I have 2 arrays of pylontech batteries (each 8 pieces). They are on the same voltage rail. But im only able to connect one of the can BMS connectons, when i connect the second one, i don´t see a second battery. The values on the screen switch ( 1 sec the values from the first 1 sec. the values from the second array). The both communicate, i see the current is slightly differnt. is it bossible the get 2 batteries in the visualisation? Thanks

hgut asked
wkirby answered ·

1 Answer

Charging electric car at night without draining solar batteries


Solis solar inverter
Victron Multiplus 48v 3000VA 35A
Victron Colour Control unit
Pylontech battery

I want to get a Zappi to charge an electric car I'm planning on getting. Is there a way to set the system up so if I charge the car at night it draws only from the grid and not from my solar battery? I presume in the daytime I can tell the Zappi to only use exported solar power when the battery is full.



gingernuts asked
Alexandra answered ·

1 Answer

Multiplus-II shut down with PV inverter


My setup is as follows:

MultiPlus-II with 2,4kWh Pylontech LiFePO4 battery module. AC-1 out is connected to the loads AND the PV inverter (Zeversolar). See here:


I turned on the MultiPlus-II with the switch to I (what is II?) and the battery is getting charges fine. Also the PV inverter is charging the battery. After battery is full the MultiPlus-II shuts down and "battery low" and "overload" LED's are on. If I disconnect the PV inverter the same thing happens but without the two red LED's.

Is there anything I have to setup in software? I'm using this system pretty much out of the box and only setup the correct battery type (LiFePO4).

Thanks in advance!

rv112 asked
marekp commented ·

2 Answers

quattro 15000 / cerbo / 24x us3000 not detecting correctly

We have installed 2x quattro parallel with 24x pylontech us3000 and cerbo gx and 450/100 mppt and 2x fronius 8.2kw primo.

Battery information is only reporting 444A max charge/discharge rate where i would be expecting to see 888A if the cerbo is indeed seeing all 24 us3000.

We have 2x of the lv hubs and have tried many different configurations.

note: 2 hubs are installed to allow for future upgradeability.

The us3000s are arranged in 4 groups of 6 in 2x racks.

I have checked all dip switch settings and cables, all as per manuals.

Tried just 1 lv hub and all 4 groups connected to it, tried 2 hubs with 2 groups on each and hubs interconnected as per pylontechs manual with hubs addressed as per manual.

Still only seeing 444A.

Primos are currently off and only charging with the 450/100, the cerbo reports the mppt charging at 74A yet battery is reporting only 37A yet when i test charge current to each cabinet of 12 us3000, i am seeing 34A per cabinet which matches with the mppt output.

Batteries are staying alive so all 24 are communicating to the cerbo (i'm assuming)

Am i missing something here?

hooky asked
Ned Yu (Pylontech) edited ·

2 Answers

Can a Phoenix 48/500 work with a Pylontech US2000 without a GX device?

I've read the document, according to me it is not possible. I have a potential client that thinks it is possible.

I've referred him to 1.2 of this document:

Then with a GX device:

As long as you are using the appropriate model for the nominal battery voltage, all VE.Bus inverters and inverter/chargers are compatible.

a phoenix 500/48 does not have a VE.Bus port, like the 1200 model.

Just want to confirm this?

jond asked
jond commented ·

1 Answer

Multiple Pylontech Banks connected to cerbo

Can I use the two BMS ports for two separate Pylontech banks and then connect a third bank of Pylontech for a third a bank on the CAN-bus? Will I still have full communication between battery and GX with normal operation?

jaqibar asked
jaqibar commented ·

1 Answer

Pylontech unbalanced cells

Hello everybody,

I have a system with 1 Victron Quattro, 1 VenusGX, 2 Victron MPPT chargers and 12 Pylontech US2000 batteries.

I am currently having high voltage problems in one of my batteries.

I have contacted Pylontech technical support to find a solution, since the problem has not disappeared for about 1 month.

I have sent all the data extracted from my batteries to Pylontech and we have seen which battery is causing high voltage problems.

They tell me that a possible solution would be to disconnect the affected battery from the system and charge it externally for 8-12 hours at 53.2v i 2-3a

Currently I do not have a charger capable of reaching these voltages and amperages and I do not want to buy one to only have to use it once. I think this is a waste of money.

The same Pylontech technician tells me another solution would be "set your inverter in force charging mode" in this way I would not have to buy an external charger.

My Questions:

1 - Is it somehow possible to activate this forced charging mode with VenusGX or Quattro?

2 - What would happen if I disconnected the communication cable that goes from my VenusGX to the master battery of my system? (CAN port)

3 - Would I continue to charge and discharge the batteries through the MPPT chargers or would the system stop working?

4 - Would this be a solution to the problem of cell imbalance?

I would like you to help me solve this problem, since the system works wonderfully, but every day I have the problem of high voltage messages and I cannot solve it.

Thanks in advance.

Javier Pardo asked
Javier Pardo commented ·

5 Answers

MultiPlus II GX disconnecting devices

Hi All,

I have a Victron ESS that consists of the following:
MultiPlus II GX 48/5000
1 x Victron BlueSolar 150/35 (Connected via VE.Direct) - 2kWp Solar Array
1 x Victron SmartSolar 150/35 (Connected via VE.Direct) - 2kWp Solar Array
2 x Pylontech US3000B Lithium Batteries
1 x ASS030720018 - VE.Can to CAN-bus BMS type B Cable 1.8m
1 x Carlo Gavazzi ET112 Grid Meter

The GX device is frequently losing connection to all of the peripherals - The 2 solar charge controllers, the grid meter and sometimes the canbus battery.

The worst is when it disconnects from the Pylontech battery, because then the battery is not receiving the "Keep-alive" signal and the system will consequently trip/shut-down after some time.

To resolve this, I need to reboot the GX device each time using the Remote Console.

The inverter has been updated to firmware level 482 and the GX device is on firmware level 2.66.

Does anybody have insight into this problem?

Nicholas Herbst asked
yann answered ·

1 Answer

Adding new Pylontech US3000C to system

Hi guys

New here. I've added 1 new US3000C bank to my existing setup as below:

Victron EasySolar 3kva with built in BlueSolar Charger MPPT 150/70

12 PV panels x 250w

Pylontech 2 x US2000 and 1 x US3000

I've made the US3000C the master and got the batteries to balance. Their voltages are almost the same when I tested them. I'm getting an error code #38 input shutdown due to battery over voltage. As per Victron, I've disconnected the PV and batteries from the system. I then added the batteries and then the PV back. The error code still keeps coming back.

Do the batteries need to be left for a day or so to balance?

Also need to know if I need to increase the charge current from the PV?



dessen asked
dessen answered ·

1 Answer

State Of Health Degradation Rate - Pylontech US3000


These Pylontech batteries have been around for a while. The design life on the US3000 is advertised at 10+ years at 25℃.

I understand that SOH is directly affected by usage, charge state and operating temperature. No two installations will be the same.

I am interested in your experience with these batteries specifically around State Of Health (SOH) rate of degradation. What is the average SOH degradation rate (% per year) across your installations? Is this more or less linear?

Thank you


jeanmc asked
Murray van Graan commented ·

1 Answer

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