Luxpower sna5000 inverter not charging battery to 100% anymore

Chao

New Member
Joined
May 7, 2023
Messages
6
Reaction score
2
Hi smart people,

I have a solar system of 3 Lux power sna5000 in parallel and 6 HinaEss power gem 5.12kw battery pack and enough solar panels. Everything working fine until I noticed that the inverters stopped charging the batteries to 100%. It gragually dropped to 94% then 92% now at 88%. My installer says to me that it`s the inverters that is doing it and it`s because they are set to charge the batteries according to the voltages rather %. He didn`t explain to me why I have lost 12% capacity on my battery packs and I am affraid it might continue to drop.

Does anyone have an idea why this is happening?
 
I Have a Luxpower LXP5 and Hubble. Before i had panels, the batteries only charged from AC (Eskom) it would do this often. Charge to 94% then 93% then 92%, every once a month it would charge to 100%.
But since the panels are in, and it's only charging from the panels, it charges to 100% stays there for 45 minutes, then drops to 99%.
Something about the BMS/balancing cells, etc.
Try setting yours to Lead Acid and charge it full that way, then switch back to Lithium.
This worked for several others on luxpower SNA.
Also, join the Luxpower Whatsapp group, link is on the LuxpowerSA Facebook group.
 
I Have a Luxpower LXP5 and Hubble. Before i had panels, the batteries only charged from AC (Eskom) it would do this often. Charge to 94% then 93% then 92%, every once a month it would charge to 100%.
But since the panels are in, and it's only charging from the panels, it charges to 100% stays there for 45 minutes, then drops to 99%.
Something about the BMS/balancing cells, etc.
Try setting yours to Lead Acid and charge it full that way, then switch back to Lithium.
This worked for several others on luxpower SNA.
Also, join the Luxpower Whatsapp group, link is on the LuxpowerSA Facebook group.
Thanks Bunta, sounds like it’s a common issue, I thought my months old battery pack was dying already. I will wait and see if it will bounce back itself. Thanks again for sharing your story.
 
Hi smart people,

I have a solar system of 3 Lux power sna5000 in parallel and 6 HinaEss power gem 5.12kw battery pack and enough solar panels. Everything working fine until I noticed that the inverters stopped charging the batteries to 100%. It gragually dropped to 94% then 92% now at 88%. My installer says to me that it`s the inverters that is doing it and it`s because they are set to charge the batteries according to the voltages rather %. He didn`t explain to me why I have lost 12% capacity on my battery packs and I am affraid it might continue to drop.

Does anyone have an idea why this is happening?
I assume the SOC comes from the battery via coms

Often a bms will only reset the SOC to 100% full if a protection voltage is hit ie either cell or pack or whatever the bms has set as the trigger for soc reset

The bms shunt can drift a bit from reality (it can't count losses)

The reset on full solves this
Normally nothing to worry about , what is your charge voltages
 
Last edited:
I assume the SOC comes from the battery via coms

Often a bms will only reset the SOC to 100% full if a protection voltage is hit ie either cell or pack or whatever the bms has set as the trigger for soc reset

The bms shunt can drift a bit from reality (it can't count losses)

The reset on full solves this
Normally nothing to worry about , what is your charge voltages
Hi Leon, I get the SOC reading from both the luxpower app as well as the solar assistant device I installed for real time data readings. Is it correct to understand that the SOC reading I’m getting doesn’t reflect the real charge situation inside the battery? The battery could still be fully charged even if the SOC reading says 88% in my case?
Not sure what’s the charge voltage, but here’s the screenshots of the settings from the app.
 

Attachments

  • IMG_1171.png
    IMG_1171.png
    476.2 KB · Views: 20
  • IMG_1172.png
    IMG_1172.png
    382.9 KB · Views: 20
I
Hi Leon, I get the SOC reading from both the luxpower app as well as the solar assistant device I installed for real time data readings. Is it correct to understand that the SOC reading I’m getting doesn’t reflect the real charge situation inside the battery? The battery could still be fully charged even if the SOC reading says 88% in my case?
Not sure what’s the charge voltage, but here’s the screenshots of the settings from the app.
Have to say Not familiar with the settings and behaviour of the luxpower

Depends

In rare cases inverter can stop charging and battery SOC does not reset as full

Scenario
1 the voltage is extremely close to the voltage where the bms resets as full but does not hit it, ie imagine if you have a switch right by the top of the neck of your car petrol tank and the tank is filled to just below it but doesn't touch it is the tank full? Yes it is , the same for battery

2 the inverter has a setting that prevents it from charging long enough to charge full amd thus the battery doesn't charge full and resets (how close it comes is anyone's guess )
Example my one inverter different brand has a time limit per stage ie it will progress to next stage if it has spent more time in previous stage in excess of this time, so in my case either upping the charge rate or change float voltage changed behaviour

If it doesn't reset then the SOC can be out of touch with reality how much also depends on cycles from last reset ie the more cycles the bigger the discrepancy can be

Can set the battery type to flooded if you have a 51.2v nominal voltage battery let it charge full and then change back to lithium and see what it says to see if it has hit reset voltage
(i think you have a 51.2v otherwise it would have reset to full at the voltage it is at now)
 
The flooded lead acid charge voltage perfectly matches a 51.2v lithium lifepo4 battery

ie 16 cells at 3.65v full voltage =58.4v which is exactly what the flooded battery charge voltage is, which is why some have the problem solved ie it takes the coms out of the picture and charges the battery full in dumb mode making it easier to hit reset voltages the bms still functions even though it is in dumb mode ie you can't overcharge the lithium

I run my batteries in dumb mode like this, the inverter i have does not support coms to my battery brand
 
I

Have to say Not familiar with the settings and behaviour of the luxpower

Depends

In rare cases inverter can stop charging and battery SOC does not reset as full

Scenario
1 the voltage is extremely close to the voltage where the bms resets as full but does not hit it, ie imagine if you have a switch right by the top of the neck of your car petrol tank and the tank is filled to just below it but doesn't touch it is the tank full? Yes it is , the same for battery

2 the inverter has a setting that prevents it from charging long enough to charge full amd thus the battery doesn't charge full and resets (how close it comes is anyone's guess )
Example my one inverter different brand has a time limit per stage ie it will progress to next stage if it has spent more time in previous stage in excess of this time, so in my case either upping the charge rate or change float voltage changed behaviour

If it doesn't reset then the SOC can be out of touch with reality how much also depends on cycles from last reset ie the more cycles the bigger the discrepancy can be

Can set the battery type to flooded if you have a 51.2v battery let it charge full and then change back to lithium and see what it says to see if it has hit reset voltage
The latest discussion we had with our smart neighbour regarding this problem is that the inverter and battery bms are not communicating correctly due to the fact that the battery brand is set wrongly at the inverter side, and our installer doesn’t have the control over our station account to make a quick correction. Our installer uses some other tech guy as the distributor that controls all his stations. We’re trying to get through to him.
The battery pack is also showing imbalanced charging rate, some fully charged and some not by the time the inverter stops charging. There is a firmware update available that fixes bms communication issues with my HinaEss powergem battery pack, so hopefully it’ll be an easy fix once we get the update.
 
The latest discussion we had with our smart neighbour regarding this problem is that the inverter and battery bms are not communicating correctly due to the fact that the battery brand is set wrongly at the inverter side, and our installer doesn’t have the control over our station account to make a quick correction. Our installer uses some other tech guy as the distributor that controls all his stations. We’re trying to get through to him.
The battery pack is also showing imbalanced charging rate, some fully charged and some not by the time the inverter stops charging. There is a firmware update available that fixes bms communication issues with my HinaEss powergem battery pack, so hopefully it’ll be an easy fix once we get the update.
Do you have more than one battery, or are you referring to cells in a single battery

Assume multiple batteries the one that is full is master?

By setting the battery in dumb mode ie flooded

You can essentially let the charging go on , the one that is full will go into protection mode and stop charging and the rest will charge full
 
Do you have more than one battery, or are you referring to cells in a single battery

Assume multiple batteries the one that is full is master?

By setting the battery in dumb mode ie flooded

You can essentially let the charging go on , the one that is full will go into protection mode and stop charging and the rest will charge full
I’ve got 6 x 5.12kwh batteries, each battery has indicating lights showing the charge status and level. Definitely going to try the dumb mode if the update doesn’t work. Will keep you posted.
 

Attachments

  • powergem-5-12kwh-lithium-ion-battery-hinaess.pdf
    461.1 KB · Views: 9
I’ve got 6 x 5.12kwh batteries, each battery has indicating lights showing the charge status and level. Definitely going to try the dumb mode if the update doesn’t . Will keep you posted.
With the recommend voltage of this battery , you can select gel battery type the voltage matches it closer ie 56.4v is the gel voltage in the luxpower

Or can select a user battery mode and make the charge and float 56.5v until all is full
Then change to current setting again
 
Last edited:
I’ve got 6 x 5.12kwh batteries, each battery has indicating lights showing the charge status and level. Definitely going to try the dumb mode if the update doesn’t work. Will keep you posted.
Nice , first battery i have heard someone in SA owns that is active balance
 
Hi smart people,

I have a solar system of 3 Lux power sna5000 in parallel and 6 HinaEss power gem 5.12kw battery pack and enough solar panels. Everything working fine until I noticed that the inverters stopped charging the batteries to 100%. It gragually dropped to 94% then 92% now at 88%. My installer says to me that it`s the inverters that is doing it and it`s because they are set to charge the batteries according to the voltages rather %. He didn`t explain to me why I have lost 12% capacity on my battery packs and I am affraid it might continue to drop.

Does anyone have an idea why this is happening?
Hi

Jump onto the LuxPower support group. Monitored by LuxPower in China. They will assist with queries. You can also ask them to run a firmware update on your inverter and Hina battery remotely.

Remember before you ask them to do the firmware update to flip your change over switch from inverter to grid(Eskom). Make sure your WiFi is working after this. The inverter reboots a few times during the update. If you don’t change over your power to your WiFi will drop and the upgrade will fail.

Phil from Luxpower/Hina (companies are linked) will help with the updates and can remotely check your configs.

Luxpower
https://chat.whatsapp.com/HYx7K33TWNg0Wg0KWaPnTi

Hina Battery
https://chat.whatsapp.com/KPUBd7ZC89RL7bIeTRVBRs
 
Top
Sign up to the MyBroadband newsletter