I have 3 inverters in Paralel. The one in the middle has a 80 error code. How can I correct it?

Hi

I have a 3kva Axpert inerter (new)

I installed it yesterday and from switching on it gives me a fault code 13 and I can’t get rid of it. Your expertise and help would be greatly appreciated 

Derick

 

Code 13 is a Warning indicator. Solar charger stops due to high PV voltage. Maximum voltage should be on the sticker on the side of the inverter. What PV voltage is displayed on the display panel.

On 2023/04/21 at 5:05 PM, Coulomb said:

I believe that warning 70⚠ is a little more serious, in that the BMS is saying that the inverter must charge the battery if at all possible to avoid potentially shortening battery life.

Warning 69⚠ was so benign that it happened all the time, and caused unnecessary worry by the users. So it's now been removed from later display firmwares (you will never see it in these later firmwares).

So now, hopefully, warnings are not terribly serious, but not totally benign either.

what is mean if error code 70 appears while the battery still 20% capacity with 25V in 24system? it happened lately many times

5 hours ago, salmoallemi said:

What does it mean if warning code 70 appears while the battery still at 20% capacity with 25V in 24system?

I'd say it means that the cells in your battery are unbalanced. So one of the 15 or 16 cells needs charging, yet the total cell voltage is 25 V.

This can happen when the battery is new, having sat on a shelf for possibly months.

It can also happen if you parallel a new battery module with an existing module, without equalising the states of charge. Then possibly all the cells in one battery module are low and needing charge, while the cells in the other battery module are still fine and could be holding up the total battery voltage.

Finally, hopefully least likely, there could be one or more weak cells in your battery. If you tell us more details (e.g. capacity and inverter(s) rated power), we may be able to help further.

A common problem is starting with a too-small battery, and working the battery too hard. 24 V systems often draw a lot of current; for example a 3 kW load requires some 137 A with sag and losses. For this, at least a 200 Ah (5 kWh) battery should be used, preferably higher, unless 3 kW loads are very rare and short-lived. Many 24 V inverters these days are rated at 4 kW (183 A and 6.7 kWh respectively).

7 minutes ago, Coulomb said:

I'd say it means that the cells in your battery are unbalanced. So one of the 15 or 16 cells needs charging, yet the total cell voltage is 25 V.

This can happen when the battery is new, having sat on a shelf for possibly months.

It can also happen if you parallel a new battery module with an existing module, without equalising the states of charge. Then possibly all the cells in one battery module are low and needing charge, while the cells in the other battery module are still fine and could be holding up the total battery voltage.

Finally, hopefully least likely, there could be one or more weak cells in your battery. If you tell us more details (e.g. capacity and inverter(s) rated power), we may be able to help further.

A common problem is starting with a too-small battery, and working the battery too hard. 24 V systems often draw a lot of current; for example a 3 kW load requires some 137 A with sag and losses. For this, at least a 200 Ah (5 kWh) battery should be used, preferably higher, unless 3 kW loads are very rare and short-lived. Many 24 V inverters these days are rated at 4 kW (183 A and 6.7 kWh respectively).

the inverter capacity and rated power as it is in the attached file notice that there are only 8 cells, also i bought the battery more than a month ago

Ok, the battery is presumably just barely large enough.

Is the battery's BMS port (probably RS-485) connected to the inverter by a cable?

Or perhaps to a Raspberry Pi or other computer running monitoring software?

I assume it must, for warning code 70 to appear.

I have a feeling that these batteries Leoch batteries are made for cell tower use; if so, it may be used. Is there any indication of manufacturing date? They may well also be sold for other purposes; hopefully it's legitimate.

Have you had a run of bad weather lately, so that the battery has not had a chance to get to 100% and balance before the sun goes down?

39 minutes ago, salmoallemi said:

the inverter capacity and rated power as it is in the attached file notice that there are only 8 cells, also i bought the battery more than a month ago

https://leoch.com/uploads/ueditor/file/20221216/6380680816436179649903741.pdf

1 hour ago, Coulomb said:

Ok, the battery is presumably just barely large enough.

Is the battery's BMS port (probably RS-485) connected to the inverter by a cable?

Or perhaps to a Raspberry Pi or other computer running monitoring software?

I assume it must, for warning code 70 to appear.

I have a feeling that these batteries Leoch batteries are made for cell tower use; if so, it may be used. Is there any indication of manufacturing date? They may well also be sold for other purposes; hopefully it's legitimate.

Have you had a run of bad weather lately, so that the battery has not had a chance to get to 100% and balance before the sun goes down?

 

For the connection between the inverter and battery is  RS-485

Mostly everyday it chareged till 100% 

I had the error code 70 just this week 

Also the weather is good between 5C and 28C here in Yemen Sana'a city 

Sadly, it's looking more likely that there is one weak cell.

If you're prepared to open the battery, you could check the voltage of each cell, or perhaps you can read that from special battery software.

If one cell is noticeably lower in voltage than the others, you could attempt to manually charge that one up with a bench  power supply. Overshoot the average cell voltage slightly, as the cell voltage will relax back after charging.