Jump to content

Axpert KS 1KVA not charge battery


mohfamous
 Share

Recommended Posts

Hello 

I have Solar inverter ( Axpert KS 1KVA )

the utility (AC in ) comes, the inverter shows on LCD charging the battery but actually I have measured the charging current on clipampere it does not charge the battery, what are the problem ?

thanks guys 

Link to comment
Share on other sites

the battery (12v/100AH New) voltage when the inverter charge it is 13.2 but there is no current, I wait for 6 hours, the inverter shows the battery is full but when I connect the load inverter stars beeb the battery is empty ?

what is the problem ? 

 

Link to comment
Share on other sites

13 minutes ago, mohfamous said:

... 13.2 but there is no current ...

Batteries could be full.

13 minutes ago, mohfamous said:

when I connect the load inverter stars beeb the battery is empty

Batteries or a battery are/is faulty. Test each battery using a load tester, same one as they use at the car battery places to test your car's battery.

Link to comment
Share on other sites

2 hours ago, mohfamous said:

13.2 but there is no current

13.2V is a bit low for float voltage on a lead acid. You generally want it to be around 13.5V to 13.8V. It depends on the type of battery of course. Perhaps you have the float voltage configured too low?

When a battery is full very little current will flow. At 13.2V on a battery that size it might be in the order of tens of milliamp at most. So that you see no current is not necessarily a bad thing.

These Voltronic inverters use voltage to gauge SoC and voltage is not a good measure at all. So you should not trust the inverter's state of charge display. In addition, a charger can also go to float too soon (there is a bug in some Voltronics that does this), so this might even be the inverter/charger itself not doing it's job properly.

What is more, you will never charge a battery properly at just 13.2V. You usually have to take it up to 14.5V at least and hold it there for as long as it takes for the charge current to drop to around 2% of the battery battery capacity (around 2 ampere in your case). This is known as the absorption phase of charging. At that point the battery is around 90% full and you can go to float.

So my advice would be to somehow get your charger back into absorption mode and hold the battery at 14.5V until you see the charge current drop.

If the battery does not accept much charge, even at a higher voltage, and still dies quickly, then the battery itself is damaged and will need replacement.

Link to comment
Share on other sites

4 hours ago, mohfamous said:

the battery (12v/100AH New) voltage when the inverter charge it is 13.2 but there is no current, I wait for 6 hours, the inverter shows the battery is full but when I connect the load inverter stars beeb the battery is empty ?

Sounds like faulty/damaged battery.

Link to comment
Share on other sites

6 hours ago, Coulomb said:

40A of current from the battery

Good point! It's a 100Ah battery. Anything over 200 watt is enough to seriously draw down the voltage even if the cables are all perfectly sound and even if the battery is brand new.

C5 is sort of the limit, that is, divide the capacity by 5. That's 20 amps. And that is optimistic, it's going to be less than 20 because of Peukert.

Link to comment
Share on other sites

On ٣‏/٧‏/١٤٣٩ هـ at 9:29 AM, plonkster said:

C5 is sort of the limit, that is, divide the capacity by 5. That's 20 amps. And that is optimistic, it's going to be less than 20 because of Peukert.

Where is the C5 located in the circuit or what its capacitance ? 

 

Link to comment
Share on other sites

1 hour ago, mohfamous said:

Where is the C5 located in the circuit or what its capacitance ? 

C5 is shorthand for C/5 or capacity divided by 5, or rather, the rate at which you can discharge that will leave the battery empty after 5 hours. I'm just saying you cannot discharge at a sustained rate of more than 20 amps.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...