Waking up a Pylontech battery

If would have thought regardless of the state of the battery that as long as AC is present the invertor should power up
 
Tun@ said:
If would have thought regardless of the state of the battery that as long as AC is present the invertor should power up
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I am not sure how it works, but I know someone else with the same inverter, will ask him to check what happens when he turns the battery off.
 
TheChamp said:
It's off, the assumption was that it's off because it cannot detect the battery, I don't remember if the Axpert can power on without the battery.
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But you said the battery had an LED on, but the SoC lights were all out (ie, battery is pap?)
 
Sinbad said:
But you said the battery had an LED on, but the SoC lights were all out (ie, battery is pap?)
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Correct, I don't know if the battery is pap or if it has gone into sleep mode due to inactivity.

The inverter is also off, my initial assumption being that it is off because it cannot detect te battery, there is power on the incoming line so the inverter is getting its AC. My assumption that the inverter needs the battery to wake up is informed by how the cheaper Mecers behave, they don't turn on without the battery.
 
Not sure if this can be done with other types of batteries but last week I had two rechargeable AA cells that have been standing for so long the voltage was too low to charge. A youtube vid said to take a fully charged battery, touch both cells negatives together then use a cable to connect both the positives for a few seconds.

Then it was able to charge.
 
Rickster said:
Not sure if this can be done with other types of batteries but last week I had two rechargeable AA cells that have been standing for so long the voltage was too low to charge. A youtube vid said to take a fully charged battery, touch both cells negatives together then use a cable to connect both the positives for a few seconds.

Then it was able to charge.
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yeah not something I'd do with a 48V lithium battery :D

Is the comms cable between the inverter and battery good?
 
Sinbad said:
yeah not something I'd do with a 48V lithium battery :D

Is the comms cable between the inverter and battery good?
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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.
 
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.
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So I think we might have found the problem?
How does the BMS tell the inverter how to charge it?
 
fetchimage
 
Sinbad said:
So I think we might have found the problem?
How does the BMS tell the inverter how to charge it?
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The BMS measures cell information. When the cell specifics reads outside of programmed permiters it goes into a fault state. Not protecting the battery but rather protecting the owners house from burning down when the energy stored by the Lithium battery gets released in thermal form and not electron from.

Sad Part is I throw away thousands of brand new batteries that went into fault mode because they are simply too dangerous to use in my line of work.

My boss of course tries to revive them every chance he gets. It is simply just too dangerous.
 
Magnum said:
The BMS measures cell information. When the cell specifics reads outside of programmed permiters it goes into a fault state. Not protecting the battery but rather protecting the owers house from burning down when the energy stored by the Lithium battery gets released in thermal form and not electron from.

sad art is I throw away thousands of brand new batteries that went into fault mode because they are simply too dangerous to use in my line of work.
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I know that. Pylontech batteries have an internal BMS that should be communicating with the inverter which apparently is not happening
 
Sinbad said:
I know that. Pylontech batteries have an internal BMS that should be communicating with the inverter which apparently is not happening
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BMS cuts out completly in under voltage state. YOU NEVER DRAIN LITHIUM. Even phospate. the owner gone goofed. Even if he can somehow get it to charge back up without flaming, it will not have the original storage. And if a cell is completely dead that pack will not work.

Not the first Pylontech to have been murdered.
 
you do get 48V lithium ion standalone battery chargers.. worth a short to buy one and try recharge that battery, then if it chargers it up to 100%, plug it all back together.
 
Why not just disconnect the battery and checking the AC feed to the inverter?
It might well be that it doesnt need a battery to function and that there is a problem with the input feed.
 
Rocket-Boy said:
Why not just disconnect the battery and checking the AC feed to the inverter?
It might well be that it doesnt need a battery to function and that there is a problem with the input feed.
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I did, mentioned it in an earlier post, AC incoming is present at the inverter.

I am waiting for someone with the same setup to confirm what happens when he switches the battery off and restarts the inverter without it.

I am struggling for time during the week to do proper diagnosis, will probably find time on weekend, I need to isolate what exactly is the problem, I will have to get hold of a 48V battery to test the inverter with.
 
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