Hallo. 

Need an assistant, I am using Growatt 3kva 24v and currently bought an Esener Lithium 25.6v

 

I am struggling to get the correct settings for :

 

2

5

11

19

20

21

 

I don't have panels but using grid to charge the battery

 

Thanks

 

 

 

 

Hi .

I decide ofter a bit of confusion to take a chance with my 4 year +old  inverter and  move from gel to lithium last week  and bought the esener 25.6  . My inverter setting are similar to  yours  and after a solid week of testing different setting I found the sweet spot so hope these setting can help .

2) max charge to 30 amps 

5 ) battery type if you use use then you can set up bulk and float volts 

11) 30 amps 

19) 28.8 bulk allowing for slite imbalance in cells  not for one cell to over volt .

20) 27.2 to 27.5v float I set at 27.3v 

21) 23.5 cut of volts .

I have noticed that float charging between 27.2 to 27.5 my setting 27.3 now  after the lithium absorbing   for hour or two the pv wats slowly  settle down   around 13wats when there's no load on the inverter  and with no charge on the lithium it settles around  26.8 which is 100% for this battery . 

I set the cut off volts at 23.5 as when this lithium is at 95amp to 100a   load normally in the evening with fridge TV light and we use the kettle or microwave the lithium settles at 24v so setting cutoff any higher than 23.5 will make the inverter shut down after a long run with microwave. 

They say BMS starts balancing at around 29v so decided to set charging at 30 amps so the lithium charges a bit slower allowing the BMS chance to balance the cells at around 28.8v  but some say the BMS only balances wonts the amps start dropping and that only really happens then in float charge after an hour or 2 

I charge only using solar so through the night the lithium settles and did notice with the first day or two the volts settled at about 26.6v  but now after a week the volts now settle in the evening at 26.8v so can only guess the battery is now better balance so looks  like these  setting are working 

Edited February 28, 20233 yr by GMAC

Is this your Battery?

https://www.esener.co.za/esener100ah.pdf
 

If so, then it is missing the bulk and float charge data. Only equalization is shown which seems rather steep at 29,2V.
Would recommend the bulk charge set to 28V and float to 27V
, 
2. Max charge the battery is certified for is 100A, recommend you set it to 50A. only in use for solar panels.
5. Battery type USE mode
11. 50A or more up to 100A. just ensure your AC supply cable and trip switch can handle that. This value can never be higher than what is also set in Program code 2
19. 28V
20. 27V
21. 20V as per spec sheet. I suspect that would be 0% SOC. I recommend 22V

Edited February 28, 20233 yr by zsde

I assume but correct me if I'm wrong but this  esener is an 8 cell so as long as the volts don't exceed 3.65 per cell all should be okay this making max volts 29.2 .

Will test the 27v float and see how long the battery absorbs before the wats drop to about 13wats from pv charging 

8 hours ago, GMAC said:

I assume but correct me if I'm wrong but this  esener is an 8 cell so as long as the volts don't exceed 3.65 per cell all should be okay this making max volts 29.2 .

Will test the 27v float and see how long the battery absorbs before the wats drop to about 13wats from pv charging 

As per conversation of the above discussion, what will you recommend or recommendation for this battery with the inveter for the settings, 2,5,11,19,20,and 21

 

I will appreciate the get the 'final' verdict. 

Thanks 

 

 

On 2023/03/01 at 5:59 PM, Furlongs said:

As per conversation of the above discussion, what will you recommend or recommendation for this battery with the inveter for the settings, 2,5,11,19,20,and 21

 

I will appreciate the get the 'final' verdict. 

Thanks 

 

 

Here some reading on the 26.5 battery hope this helps Axpert settings for LiFePO4 https://powerforum.co.za/topic/4614-axpert-settings-for-lifepo4/

Im still stay

30amp Charge 

User setting 

Decided to change  bulk 28.5

Float 27.3

 

Tested today float 27.5 , pv input wats settled 17wat , lithium at rest settled at  26.9  but when under 14 amp load it settled at 26.4 .

Tested also 27v float ,  pv input wats settle at 7wats , at rest lithium  settled 26.8 but under 14amp load it settled at 26.1 

Will test tomorrow 28v float and see what is does but if it still settles at 26.9 then will stay with 27.3 float 

Edited March 2, 20233 yr by GMAC

18 hours ago, GMAC said:

Here some reading on the 26.5 battery hope this helps Axpert settings for LiFePO4 https://powerforum.co.za/topic/4614-axpert-settings-for-lifepo4/

Im still stay

30amp Charge 

User setting 

Decided to change  bulk 28.5

Float 27.3

 

Tested today float 27.5 , pv input wats settled 17wat , lithium at rest settled at  26.9  but when under 14 amp load it settled at 26.4 .

Tested also 27v float ,  pv input wats settle at 7wats , at rest lithium  settled 26.8 but under 14amp load it settled at 26.1 

Will test tomorrow 28v float and see what is does but if it still settles at 26.9 then will stay with 27.3 float 

Thanks

 

Let me know how the tests went, I think that can, might also be helpful in getting the correct settings.

 

Can you assist me:

N.B. How long can I add another Esener 25.6v to my existing one which I bought this year February, I want to add more power but I am not sure how long must I wait to add the second one. Is a year too soon, or too far?

 

Your assistance will be appreciated

 

Thanks 

 

 

 

20 hours ago, GMAC said:

Here some reading on the 26.5 battery hope this helps Axpert settings for LiFePO4 https://powerforum.co.za/topic/4614-axpert-settings-for-lifepo4/

Im still stay

30amp Charge 

User setting 

Decided to change  bulk 28.5

Float 27.3

 

Tested today float 27.5 , pv input wats settled 17wat , lithium at rest settled at  26.9  but when under 14 amp load it settled at 26.4 .

Tested also 27v float ,  pv input wats settle at 7wats , at rest lithium  settled 26.8 but under 14amp load it settled at 26.1 

Will test tomorrow 28v float and see what is does but if it still settles at 26.9 then will stay with 27.3 float 

Hallo.

I also got this settings from Esener, I am also testing them to see how it works, they said it's new updated ones, hope it might also be useful 

 

 

On 2023/03/01 at 5:59 PM, Furlongs said:

As per conversation of the above discussion, what will you recommend or recommendation for this battery with the inveter for the settings, 2,5,11,19,20,and 21

 

I will appreciate the get the 'final' verdict. 

Thanks 

 

 

Here some reading on the 26.5 battery hope this helps https://powerforum.co.za/

Im still stay

30amp Charge 

User setting 

Decided to change  bulk 28.5

Float 27.3

 

Tested today float 27.5 , pv input wats settled 17wat , lithium at rest settled at  26.9  but when under 14 amp load it settled at 26.4 .

Tested also 27v float ,  pv input wats

Check this out a very interesting volts test 

 

Chased the float charge up to 28v for the day .

Pv input volts settled at 18wats .

At rest lithium settles after about hour at 27.11 .

Under 15 amp load volts settled at 26.65v 

Now wondering about balance volts on this lithium BMS as some have reported the cells going out of balance over time at 27v float on othere makes of lithium and they have to chase float up to 28v for the BMS to balance as some states BMS only starts balancing anything from 27.6 v and it does not take an hour to balance it can take days or even weeks as the BMS balances with very small currants .

The problem with this lithium is there no ports to monitor the cells and opening the box will damage the no tamper sticker voiding the warranty so unless someone has more info on balancing volts and installed BMS  we won't know if 27v float is going to do more damage due to unbalanced volts over time and best is then 28v for balancing . 

I also have a esener battery. Been running it for a month on 28 bulk and 27 float. Axpert inverter. However. I had only a day to install and setup. Then i was away for 3 weeks. It did fine during that time. But had no way of monitoring or logging.

 

So over the oast couple of days ive been playing around with setting. And doing various test. From an 2 hour charge on higher volts. And seeinge where it settles. But for me to get any more accurate readings. I will require a smart shunt. Once that has been installed. We will know what goes in.   

 

I have also considered phoning esener and asking them what BMS is installed. And at what voltage they start balancing. 

 

By charging at a higher voltage. I also noticed they settle at a higher voltage. And does not discharge that low after the load shedding cycle. 

 

The axpert is known for "float bug" which i am sure i understand now. It doesnt charge to the bulk voltage. As the battery voltage did not drop down low enough to trigger the charge algorithm. 

8 minutes ago, Flouw said:

I also have a esener battery. Been running it for a month on 28 bulk and 27 float. Axpert inverter. However. I had only a day to install and setup. Then i was away for 3 weeks. It did fine during that time. But had no way of monitoring or logging.

 

So over the oast couple of days ive been playing around with setting. And doing various test. From an 2 hour charge on higher volts. And seeinge where it settles. But for me to get any more accurate readings. I will require a smart shunt. Once that has been installed. We will know what goes in.   

 

I have also considered phoning esener and asking them what BMS is installed. And at what voltage they start balancing. 

 

By charging at a higher voltage. I also noticed they settle at a higher voltage. And does not discharge that low after the load shedding cycle. 

 

The axpert is known for "float bug" which i am sure i understand now. It doesnt charge to the bulk voltage. As the battery voltage did not drop down low enough to trigger the charge algorithm. 

I appreciate the conversation on this topic of an Esener Lithium.

I installed mine two weeks ago with a Growatt 3kva, after days of struggling with settings, I finally got it right more especially with the help from this forum.

Let's keep helping each other. The Esener send me the attached settings which I also tested it for 3days and also works fine with my 3kva Growatt inveter...

 

 

I received the same info from Esener. They responded rather quick. However, how clever the lady behind the phone is i dont know if im going to ask more technical questions. 

 

Would actually like to go visit them. 

 

Regarding the Growat inverter. Does it actually bulk charge properly? Do you ever see the 28v that you set it to? Or does it also stop charging around 27.4V and then settles. 

 

Even setting the float voltage to 28V. It just charges to around 27.4V with fans running. Then switches off. And the voltage creeps to 28V. 

 

This is all leaving me in the dark a little. And the only way for me to monitor it better. I will have to install a shunt..

 

10 minutes ago, Flouw said:

I received the same info from Esener. They responded rather quick. However, how clever the lady behind the phone is i dont know if im going to ask more technical questions. 

 

Would actually like to go visit them. 

 

Regarding the Growat inverter. Does it actually bulk charge properly? Do you ever see the 28v that you set it to? Or does it also stop charging around 27.4V and then settles. 

 

Even setting the float voltage to 28V. It just charges to around 27.4V with fans running. Then switches off. And the voltage creeps to 28V. 

 

This is all leaving me in the dark a little. And the only way for me to monitor it better. I will have to install a shunt..

 

I might not been the correct bulk and float settings, but it's working well and perform according to expected. It start at 26.2v during loadshedding, in an hour's time it will be at 25.9v, when electricity comes back after two hours, it will be at 25.8v

So far I haven't tested it in 4hours loadshedding.

I will love to see how it will perform.

 

I attached the picture of settled.

What is your current settings for Bulk and Float?

I tested 4 hours load shedding last night but it was in 2 intervals. I had the fridge , and fans running . 

I only charge from solar so I pulled the fuzes so I can then check the volts in the morning . 

Volts was 26.4 and according to the chart I use that's 70% so 30% used but the question now is how accurate is this chart so decided to connect my radio controlled wat meter between lithium and inverter and test the amp hours and wats charged.  

Set bulk to 28v and float to 27.3v and 30amp charge .

It took  about 25minute to reach 28v but took about 3 hours for the amps to drop down to 1amp at 27.3v and anothere hour for the amps to drop to 0.15amps .

And the surprising part 30.910ah 817.5w charge that making as close as it's going to get to 70% soc  the chart indicated 

 

@GMAC

Being very new to lifepo4. And the learning curve has been steep. But im a quick learner. 

The reality is. Lifepo4 battery will reach 100% SOC even at a lower voltage. 3.4/3.45v per cell seems to be the sweet spot. The trick seems to be that you dont want to introduce high voltage to them. High voltage charges them up faster. But you risk damaging them. 

Without a amp meter inline im unable to conduct any further tests.

 

My axpert inverter seems to CC charge them at whatever you put in as bulk charge till it reaches the float charge voltage. And then it coasts from there at CV set in float. How long it takes to get tot 0.1amp i dont know. Hence me getting a shunt in there ASAP.  

Dont want to buy a Victron smart shunt. As i would like to have a display without using my phone.

Trying to locate a Junctek as it has display and bluetooth capability. Still cheaper than Victron.

 

I currently have bulk at 28V. And float at 27.6V, left it over night as im trying to see if it will be more stable aftet the charge. Hoping that BMS balance gets triggered aroubd there. Float is going back to 27.4V.

I dont have absorption voltage or time function. So trying to do a workaround.

Once i have the meter in. A can actually plot a graph on how the inverter is charging. And this will clear up a few things.

 

Im also going to contact Esener to find out what BMS is installed. And at what volts do they start to balance.

 

 

Edited March 6, 20233 yr by Flouw

On 2023/03/06 at 7:08 AM, Flouw said:

@GMAC

Being very new to lifepo4. And the learning curve has been steep. But im a quick learner. 

The reality is. Lifepo4 battery will reach 100% SOC even at a lower voltage. 3.4/3.45v per cell seems to be the sweet spot. The trick seems to be that you dont want to introduce high voltage to them. High voltage charges them up faster. But you risk damaging them. 

Without a amp meter inline im unable to conduct any further tests.

 

My axpert inverter seems to CC charge them at whatever you put in as bulk charge till it reaches the float charge voltage. And then it coasts from there at CV set in float. How long it takes to get tot 0.1amp i dont know. Hence me getting a shunt in there ASAP.  

Dont want to buy a Victron smart shunt. As i would like to have a display without using my phone.

Trying to locate a Junctek as it has display and bluetooth capability. Still cheaper than Victron.

 

I currently have bulk at 28V. And float at 27.6V, left it over night as im trying to see if it will be more stable aftet the charge. Hoping that BMS balance gets triggered aroubd there. Float is going back to 27.4V.

I dont have absorption voltage or time function. So trying to do a workaround.

Once i have the meter in. A can actually plot a graph on how the inverter is charging. And this will clear up a few things.

 

Im also going to contact Esener to find out what BMS is installed. And at what volts do they start to balance.

 

 

Hallo.

So far according to your new settings(tests), how far it works, what's your most preferred bulk and float settings.

 

I am still on 28.4v bulk and 27.3 float.

Is there anything I can change or it's balanced?

 

Thanks

 

 

So far all  is good on similar setting only my float is 27.2 but close enough . 

It would be nice to check battery balance but no complaints about this lithium so far . 

Hi

 

I have the same setup here (growatt 3kva, 2.56 Essener and 2 X 540w panels) just recently installed.
My battery doesn't seem to be going beyond 26.8v even when eskom is available, is that normal ? what should it go up to

 

Thanks

7 hours ago, Docs said:

Hi

 

I have the same setup here (growatt 3kva, 2.56 Essener and 2 X 540w panels) just recently installed.
My battery doesn't seem to be going beyond 26.8v even when eskom is available, is that normal ? what should it go up to

 

Thanks

what is your setting on? 

My inverter is still on the standard settings. I see that the battery voltage is now getting up to 27.0v. it's now running for about 30 hours or so should it take some time to balance out.

 

what does your batteries sit on when Eskom is available.

8 hours ago, Docs said:

My inverter is still on the standard settings. I see that the battery voltage is now getting up to 27.0v. it's now running for about 30 hours or so should it take some time to balance out.

 

what does your batteries sit on when Eskom is available.

 

you need to set the inverter according to your and battery requirements. if you read the whole thread, you will be able to see the settings/changes made to the inverter to give the the desired settings. 

 

float voltage and bulk voltage being the most important to set up with your lithium battery

 

Noted will do. What does your battery sit on with the adjusted settings when Eskom is available.

 

 

On a seperate note do you also find the fans run loud for quite a while after loadshedding and battery is charged up

1 minute ago, Docs said:

Noted will do. What does your battery sit on with the adjusted settings when Eskom is available.

 

 

On a seperate note do you also find the fans run loud for quite a while after loadshedding and battery is charged up

 

i dont have a Growatt inverter. i have an Mecer. 

 

the battery voltage will go to whatever you set it to. 

set Bulk to 28.2v, float to 27.2V. this should be more than enough as a start point. and you can always make small adjustments at a later stage, 

 

 

according to my knowledge, the growatt inverter has fans running permanently. it will ramp up during heavy loads while being supplied from DC. and will also ramp up while charging. once the charging is completed, the fans will calm down, but will never switch off. this is according to what i have heard.