Waking up a Pylontech battery

Some feedback, we were able to successfully wake up the inverter with my test kit, the inverter is alive and well, after waking it can happily stay on without the battery.

The Pylontech however just refuses to play nice, the idea was that with the inverter on the battery should be able to get out of idle, no such luck, the battery can start up for a brief moment then switches off again, taking the whole inverter down with it.

According to Pylontech LED status the battery is in normal idle mode, power LED on, no alarm LED and all the SoC LEDs are off. There is DC power from the inverter towards the battery, measured on the cables but I can't pick up anything on the battery, obviously because it's in idle state with no output.

Someone suggested the charging voltage could be to high causing the battery to shut down, I adjusted the voltage to 53V as suggested, still the same, on for a brief moment and shuts down.

Battery is currently off, but it shows that it's charging on the inverter display, inverter is in bypass mode and charging the battery, no idea how if the battery is off but anyway, left it like that hoping to test again after it shows fully charged.

Any ideas?
 
TheChamp said:
Any ideas?
Click to expand...
did the rocker switch off/rocker on/red run button pressed for >4 seconds thing?

spit balling:

maybe set all charging current settings on inverter to lowest possible option. (I read somewhere that if very low charged the battery should initially be charged very slowly -> battery charge state seems unknown so far).

if really desperate and knowing potential impact on warranty you could also check the battery actual voltage by opening the box (have a look here for reference -> individual battery packs should be connected in series with one another with one pack finnaly connected directly to pos terminal of box and one pack connecting Negative to PCB -> PCB then connects to neg terminal of box -> measure voltage between pos of box and negative connector from battery pack that enters PCB). Do not drop any screw drivers/screws/anything that conducts anywhere in that box. Do at own risk...

Edit:
pylontech manual suggests that green "run" LED (as opposed to green power LED at rocker switch) being steadily on should indicate charging (and eventually state of charge LED's will start blinking).... so before surgery leave it to (hopefully) charge.
 
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one poster said:
Edit:
pylontech manual suggests that green "run" LED (as opposed to green power LED at rocker switch) being steadily on should indicate charging (and eventually state of charge LED's will start blinking).... so before surgery leave it to (hopefully) charge.
Click to expand...

I'd vote for this too - leave it on charge overnight and see if it returns to life.
 
one poster said:
did the rocker switch off/rocker on/red run button pressed for >4 seconds thing?

spit balling:

maybe set all charging current settings on inverter to lowest possible option. (I read somewhere that if very low charged the battery should initially be charged very slowly -> battery charge state seems unknown so far).

if really desperate and knowing potential impact on warranty you could also check the battery actual voltage by opening the box (have a look here for reference -> individual battery packs should be connected in series with one another with one pack finnaly connected directly to pos terminal of box and one pack connecting Negative to PCB -> PCB then connects to neg terminal of box -> measure voltage between pos of box and negative connector from battery pack that enters PCB). Do not drop any screw drivers/screws/anything that conducts anywhere in that box. Do at own risk...

Edit:
pylontech manual suggests that green "run" LED (as opposed to green power LED at rocker switch) being steadily on should indicate charging (and eventually state of charge LED's will start blinking).... so before surgery leave it to (hopefully) charge.
Click to expand...
I have read the warranty terms and conditions, the manufacturer must be in a very charitable mood to honour it, there are so many terms and conditions but the clincher is that the battery should be cycled and I know for a fact that it wasn't, so we are trying to exhaust everything before we think about that.

We are not at the tearing down stage for now, next step is to make it a slave to a good battery and see what happens, it's just slightly frustrating because it does not seem to have an error but with the way it is behaving there is just no way of knowing what is wrong with it, if only it could turn on a throw a fault alarm at least.
 
Speedster said:
I'd vote for this too - leave it on charge overnight and see if it returns to life.
Click to expand...
Yeah, it's shows as charging so that's the idea, will hear from him how it looks tomorrow.

I also need to get the comms between battery and inverter sorted, I get an error 61 alarm, no comms when I set the battery to PYL(Pylontech). It has been suggested by people on Power Forum that the comms cable supplied is not properly wired, anyone ever got the battery comms right on Axpert inverters?
 
TheChamp said:
Yeah, it's shows as charging so that's the idea, will hear from him how it looks tomorrow.

I also need to get the comms between battery and inverter sorted, I get an error 61 alarm, no comms when I set the battery to PYL(Pylontech). It has been suggested by people on Power Forum that the comms cable supplied is not properly wired, anyone ever got the battery comms right on Axpert inverters?
Click to expand...
Crimp own cable
powerforum.co.za

Axpert King 5Kw and Pylontech communication ports

Hi All I have a Axpert King 5Kw inverter and a Pylontech US3000 battery. Within the inverter settings I have configuration number 5 set to PYL to communicate to the Pylontech battery and I have the communication cable connected between the inverter and the battery. I am tough receiving an error c...
powerforum.co.za powerforum.co.za
 
TheChamp said:
I have read the warranty terms and conditions, the manufacturer must be in a very charitable mood to honour it, there are so many terms and conditions but the clincher is that the battery should be cycled and I know for a fact that it wasn't, so we are trying to exhaust everything before we think about that.

We are not at the tearing down stage for now, next step is to make it a slave to a good battery and see what happens, it's just slightly frustrating because it does not seem to have an error but with the way it is behaving there is just no way of knowing what is wrong with it, if only it could turn on a throw a fault alarm at least.
Click to expand...
if you manage to get comms cables sorted you could possibly try the diagnostic tool (be careful it can break what is not yet broken).

some overview of the comms cables and take note of the zip archive (work through the linked post and the three posts that follow it). Instructions for install. If not active on powerforum maybe also work through this post. If you run the diagnostic tool and it is in chinese, looking at GUI menus go to 5th from left (contains a "L") - select second option.
 
one poster said:
if you manage to get comms cables sorted you could possibly try the diagnostic tool (be careful it can break what is not yet broken).

some overview of the comms cables and take note of the zip archive (work through the linked post and the three posts that follow it). Instructions for install. If not active on powerforum maybe also work through this post. If you run the diagnostic tool and it is in chinese, looking at GUI menus go to 5th from left (contains a "L") - select second option.
Click to expand...
Thanks, we contacted the supplier and he said we should bring it in for assessment if we don't come right, so that's what we'll do to save time, they probably have better diagnostic resources.
 
TheChamp said:
No comms cable, or at least it's there but not working, apparently the comms cable that was supplied doesn't work and he needed to buy he a specially made one for communication to happen.
Click to expand...
I think it also needs a Raspberry pi computer, CAN or RS485 hat and software. I used free software for Victron (venus os). This is working on a CAN bus cable to the Pylontech. I used a standard network ethernet utp cable and cut off one end and connect 2 wires to the CAN hat using my Pylontech manual for pin numbers.

Pylontech-venus.png
 
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one poster said:
pylontech manual suggests that green "run" LED (as opposed to green power LED at rocker switch) being steadily on should indicate charging (and eventually state of charge LED's will start blinking).... so before surgery leave it to (hopefully) charge.
Click to expand...

My first Pylontech US2000, connected to my RCT Axpert 4kW, has a flashing red light from new which means error. The battery was low from the supplier but it sorted itself out after 2 days on the Axpert and solar panels.
Green light on is power on, flashing is discharging and one soc light flashing means charging. 2 years later and my US2000 says 95% health and is still working.
 
russellw1 said:
My first Pylontech US2000, connected to my RCT Axpert 4kW, has a flashing red light from new which means error. The battery was low from the supplier but it sorted itself out after 2 days on the Axpert and solar panels.
Green light on is power on, flashing is discharging and one soc light flashing means charging. 2 years later and my US2000 says 95% health and is still working.
Click to expand...
This doesn't even have an error led, problem is that it shuts the inverter down so there is no way of even getting it to start to charge, I unfortunately don't have a different inverter to plug it in or a charger, because I believe the bahaviour of the inverter could have something to do with it.
 
TheChamp said:
This doesn't even have an error led, problem is that it shuts the inverter down so there is no way of even getting it to start to charge, I unfortunately don't have a different inverter to plug it in or a charger, because I believe the bahaviour of the inverter could have something to do with it.
Click to expand...
My Goodwe have a setting to force charge batteries that were discharged too much. When that was turned on, it was easy to get pylontech batteries to charge.

I was also very weary of the Axpert inverters which is what swayed me to the goodwe at the time the sunsynks wasn't yet on CoCTs approved list.
 
Tinuva said:
My Goodwe have a setting to force charge batteries that were discharged too much. When that was turned on, it was easy to get pylontech batteries to charge.

I was also very weary of the Axpert inverters which is what swayed me to the goodwe at the time the sunsynks wasn't yet on CoCTs approved list.
Click to expand...
Yeah, I think the inverter just cannot handle whatever is happening at startup. I was hoping to to get an opportunity to pair it with another battery as a slave and see what happens, just to get closure, I will see if I find time for that before it's taken away.
 
Is that Battery still sleeping? TIme to say Goodbye.
 
TheChamp said:
This doesn't even have an error led, problem is that it shuts the inverter down so there is no way of even getting it to start to charge, I unfortunately don't have a different inverter to plug it in or a charger, because I believe the bahaviour of the inverter could have something to do with it.
Click to expand...
Probably not enough power in the batteries to charge the Axpert capacitors. If it is connected to 2 or 3 36V solar panels it will normally switch on I think. My Axpert won't switch on if the battery voltage is less than 48V If you hold the Pylontech on button for 5 seconds with nothing connected the Pylontech should show a voltage, probably 47V or less. I powered my Apert with 4 12V alarm batteries in series and then reduced the shutdown voltage to about 45V. The actual shutdown is 2V higher than this at 47V. Chargin the capacitors causes a good spark on the battery terminal. That is expected.
 
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russellw1 said:
Probably not enough power in the batteries to charge the Axpert capacitors. If it is connected to 2 or 3 36V solar panels it will normally switch on I think. My Axpert won't switch on if the battery voltage is less than 48V If you hold the Pylontech on button for 5 seconds with nothing connected the Pylontech should show a voltage, probably 47V or less. I powered my Apert with 4 12V alarm batteries in series and then reduced the shutdown voltage to about 45V. The actual shutdown is 2V higher than this at 47V.
Click to expand...
Tell me more about the capacitors, why would they not charge from AC? Because I did the same thing, created a 48V battery and managed to successfully power the inverter on, after initializing the inverter can stay on from AC only without the battery, as soon as I close the battery isolator the inverter trips and shuts down.
 
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