Basen Green DIY Case 48V V2

[obsoletion]

This may be a dumb question, but how do you change the protection setting in the BMS? I entered the password but it won't let me change any of the protection values? Do you have to download the setting and change them offline and then upload them? If so does anyone have a good set of parameters in a file already?

 

[Mav986]

Yes my version doesn't show the SOC on the main display.
Also, I find it annoying to have to push a button and wait for the data to load on the screen... WTH?

Have you guys tried the Bluetooth app with the "Massage"?

 

[Mav986]

This may be a dumb question, but how do you change the protection setting in the BMS? I entered the password but it won't let me change any of the protection values? Do you have to download the setting and change them offline and then upload them? If so does anyone have a good set of parameters in a file already?

So in the password box, you enter either 666666 or 888888 (no enter) depending on the page. As soon as it accepts the password, you should see the fields you can change. Click on the field on the left of the screen then on the right it will show you the modify box. Change the value and hit "write". You can change anything in the Alarms and Protection screens under the Info tab.

 

[altenergy21]

OK well was this pack top balanced? Is this the first time you power it up and connect to the software?

I would either suspect a bad connection or bad cells. But double and triple check that you connected your BMS sense wires and balance wires correctly and torqued the nut with 5-6 N-m.

I swapped BMS and the problem persists.
I isolated it to the PCB1 rail.

I wonder if I can just run a straight wires for those two wires - 5,6

 

[obsoletion]

Was your v1.0.0 also the one which did not show the SOC on the display?

It still doesnt show SoC on the display

 

[obsoletion]

So in the password box, you enter either 666666 or 888888 (no enter) depending on the page. As soon as it accepts the password, you should see the fields you can change. Click on the field on the left of the screen then on the right it will show you the modify box. Change the value and hit "write". You can change anything in the Alarms and Protection screens under the Info tab.

Well... That resolved my issue, i was able to change parameters using the 666666 password. I never thought the password on one settings screen would be 888888 and then on a different screen be 666666, but that is what is going on WTH

 

[obsoletion]

I swapped BMS and the problem persists.
I isolated it to the PCB1 rail.

I wonder if I can just run a straight wires for those two wires - 5,6

I would think you would be fine doing that. Are you saying the PCB has bad traces?

 

[obsoletion]

I still have the issue that I cannot have more than 10 packs connected in parallel. I can have 0-9 and it all talks fine to the EG4 Flexboss, as soon as I add one more, I get the red battery indicator and W000 error (communication loss)

 

[altenergy21]

I would think you would be fine doing that. Are you saying the PCB has bad traces?

I ran a continuity test and it seems I have an open circuit for pin 5,6. This PCB came wrapped tightly in plastic sheets. All other PCBs weren't wrapped.

 

[Mav986]

I ran a continuity test and it seems I have an open circuit for pin 5,6. This PCB came wrapped tightly in plastic sheets. All other PCBs weren't wrapped.

OK there you go. Let them know of the defect obviously, but you can just solder extensions to salvage this one I would think.
I've been lucky so far all is good. Just trying to get the pack to top balance nicely. Getting there.

 

[obsoletion]

Yes my version doesn't show the SOC on the main display.
Also, I find it annoying to have to push a button and wait for the data to load on the screen... WTH?

Have you guys tried the Bluetooth app with the "Massage"?

I have but to see any real data it asks for a password I can’t seem to find or guess

 

[PhotonionV]

Hi everyone and a big thanks for all the useful info in here!

Last November I bought a BASEN DIY v2 battery kit with EVE 314Ah cells.
It was easy to put together, however, I am afraid I never managed to get it working properly with my inverter, a Growatt 6000ES+ 6kW single phase unit.
During first connection and initial use, using either the RS485 or CAN protocol for communication with the inverter my battery SOC would jump from 70% to 100% suddenly after a few minutes of charging.
When I applied a load on the inverter (2.5kW) the SOC would immediately drop to 5% and the inverter would shut the output.
No matter what I tried I never managed to get the BMS properly communicate with the inverter, therefore I used the 'US2' option on the Growatt inverter to get some usability out of my battery pack.
For a few months it worked OK, but not perfect in any case, but at least I could manage to charge and discharge the battery, albeit at ~70% of its capacity.

Unfortunately, in the last few weeks my battery would stop charging at a rate higher than 250W (5A @ 50V) and stays at a maximum voltage of 51.9V (checked @ the battery terminals using a multimeter). On the other hand, at the BASEN BMS terminals the reading is 54.5 V (the float voltage setting) and therefore charging stops. I also get a Charge MOS failure and a cell overvoltage protect alarm, although ALL cells are around 3.234V with 3-10 mV variations between them....

I think I have a faulty BMS and thinking of replacing it with a JK BMS which seems to have a better reputation and I can find the settings easily.

Unfortunately BASEN customer support is practically useless... They just tell everyone to cycle for a few times and then.... probably pray

 

[Mav986]

Hi everyone and a big thanks for all the useful info in here!

Last November I bought a BASEN DIY v2 battery kit with EVE 314Ah cells.
It was easy to put together, however, I am afraid I never managed to get it working properly with my inverter, a Growatt 6000ES+ 6kW single phase unit.
During first connection and initial use, using either the RS485 or CAN protocol for communication with the inverter my battery SOC would jump from 70% to 100% suddenly after a few minutes of charging.
When I applied a load on the inverter (2.5kW) the SOC would immediately drop to 5% and the inverter would shut the output.
No matter what I tried I never managed to get the BMS properly communicate with the inverter, therefore I used the 'US2' option on the Growatt inverter to get some usability out of my battery pack.
For a few months it worked OK, but not perfect in any case, but at least I could manage to charge and discharge the battery, albeit at ~70% of its capacity.

Unfortunately, in the last few weeks my battery would stop charging at a rate higher than 250W (5A @ 50V) and stays at a maximum voltage of 51.9V (checked @ the battery terminals using a multimeter). On the other hand, at the BASEN BMS terminals the reading is 54.5 V (the float voltage setting) and therefore charging stops. I also get a Charge MOS failure and a cell overvoltage protect alarm, although ALL cells are around 3.234V with 3-10 mV variations between them....

I think I have a faulty BMS and thinking of replacing it with a JK BMS which seems to have a better reputation and I can find the settings easily.

Unfortunately BASEN customer support is practically useless... They just tell everyone to cycle for a few times and then.... probably pray

Hey sorry to hear your issues.

Lots of questions but the first is:

Did you top balance your cells before putting the pack in service?
Did you go back and verify all your balance and sense leads were correctly attached to the correct cell and torque to 5-6 N-m?

If the BMS is seeing 54.5V and the battery is at 51.9V then the charge and discharge MOS are open.
Make sure your BMS settings are correct.
Just forget the comms for bow and run in open loop and see if it helps.

 

[PhotonionV]

Hey sorry to hear your issues.

Lots of questions but the first is:

Did you top balance your cells before putting the pack in service?
Did you go back and verify all your balance and sense leads were correctly attached to the correct cell and torque to 5-6 N-m?

If the BMS is seeing 54.5V and the battery is at 51.9V then the charge and discharge MOS are open.
Make sure your BMS settings are correct.
Just forget the comms for bow and run in open loop and see if it helps.

Thank you Mav for the reply!

Concerning your first question:
When I first installed the pack the initial battery SoC was ~70% as indicated by the PC Software (which connects to the BMS) and the same SoC was reported on the inverter after successful communication of the battery pack with the inverter.

Then, I let the battery charge from the PV arrays (this is DIY off-grid system, there is no AC input) and after a few hours (of very low sunshine, it was November) I saw a sudden jump from 75% to 100%.
Nevertheless, the next day, I left the battery pack to remain at 100% in order to balance. However, I don't know if this ever happened, since the BMS-inverter communication was in any case so bad, I have no clue if any balancing took place. At least I tried
A day later (after spending 24hrs at 100%, a small discharge during the night and recharge of this lost percentage in the morning), I decided to test discharging the battery. I plugged in my mobile phone and everything worked like a charm.
However, when a higher load was plugged in (2.6kW) the SoC immediately dropped to 5% and the inverter stopped the AC output supply.
Letting the battery charge without a load returned the SoC to 100% after 30 minutes
Now coming to your second question:
Last Sunday I went back to my pack, opened up the cover and started checking the wiring and did some continuity tests on the BMS balance leads. Everything seems OK, but I probably need to test once more after disconnecting everything and removing the busbars. I also measured the battery cells individually and they were all around 3.23 V with minor differences between them (I guess that's good news).

As you mentioned, I can verify your remark about the discharge MOS, where I get an error in the PC software (see attached Figure).
Probably the BMS settings are totally off, but no matter how many times I have asked BASEN to provide me with a list of the recommended settings for the LPF batteries they tell me to fully charge and discharge . I guess even if I go back to them and say that the whole battery pack is on fire, they will probably recommend the same action.

Finally, concerning the comms, yes, it's been the last 3 months that I have been using the pack without any comms with the inverter (they never worked together) and used the inverter 'custom' battery management mode, where I used a float value of 54.7V, A charge voltage of 55.2V and a cut-off voltage of 47V. Things worked (almost) fine, until the last 2 weeks, when I realized I cannot charge using a current higher than 5A and cannot charge beyond a voltage of 53V....

This is my first DIY battery pack installation and I thought it would be easier, but unfortunately I underestimated all the factors and things that can go wrong, along with probably the worst customer service I have ever experienced...

Again, thank you for the reply, much appreciated!!!

Here is the PC software status screenshot and a picture from my pack:

 

[Mav986]

Thank you Mav for the reply!

Concerning your first question:
When I first installed the pack the initial battery SoC was ~70% as indicated by the PC Software (which connects to the BMS) and the same SoC was reported on the inverter after successful communication of the battery pack with the inverter.

Then, I let the battery charge from the PV arrays (this is DIY off-grid system, there is no AC input) and after a few hours (of very low sunshine, it was November) I saw a sudden jump from 75% to 100%.
Nevertheless, the next day, I left the battery pack to remain at 100% in order to balance. However, I don't know if this ever happened, since the BMS-inverter communication was in any case so bad, I have no clue if any balancing took place. At least I tried
A day later (after spending 24hrs at 100%, a small discharge during the night and recharge of this lost percentage in the morning), I decided to test discharging the battery. I plugged in my mobile phone and everything worked like a charm.
However, when a higher load was plugged in (2.6kW) the SoC immediately dropped to 5% and the inverter stopped the AC output supply.
Letting the battery charge without a load returned the SoC to 100% after 30 minutes
Now coming to your second question:
Last Sunday I went back to my pack, opened up the cover and started checking the wiring and did some continuity tests on the BMS balance leads. Everything seems OK, but I probably need to test once more after disconnecting everything and removing the busbars. I also measured the battery cells individually and they were all around 3.23 V with minor differences between them (I guess that's good news).

As you mentioned, I can verify your remark about the discharge MOS, where I get an error in the PC software (see attached Figure).
Probably the BMS settings are totally off, but no matter how many times I have asked BASEN to provide me with a list of the recommended settings for the LPF batteries they tell me to fully charge and discharge . I guess even if I go back to them and say that the whole battery pack is on fire, they will probably recommend the same action.

Finally, concerning the comms, yes, it's been the last 3 months that I have been using the pack without any comms with the inverter (they never worked together) and used the inverter 'custom' battery management mode, where I used a float value of 54.7V, A charge voltage of 55.2V and a cut-off voltage of 47V. Things worked (almost) fine, until the last 2 weeks, when I realized I cannot charge using a current higher than 5A and cannot charge beyond a voltage of 53V....

This is my first DIY battery pack installation and I thought it would be easier, but unfortunately I underestimated all the factors and things that can go wrong, along with probably the worst customer service I have ever experienced...

Again, thank you for the reply, much appreciated!!!

Here is the PC software status screenshot and a picture from my pack:

View attachment 279154


View attachment 279155

OK first problem:

You didn't top balance your cells before putting the pack into service.
So what I would do (if not too late) is get a benchtop power supply (60V - 5A or higher) and do a proper top balance.
(search this forum there are many folks that have documented proper top balancing techniques). This can take many hours even days.

Also, you need to understand that the SOC in % as reported by the BMS is often erroneous and not accurate at all, especially when the pack is brand new, first charge... so I would not have gone right to closed loop coms before making sure the pack has been top balanced and brought up to 100% SOC and BMS has reset SOC and capacity.

It looks like you would need to increase your bulk charging voltage to 56.0 to 56.8 at least so as to get the BMS to reset etc...

I would take photos of the BMS protection and alarm parameters pages. But the original BMS parameters should have not been so out of wack as to create these issues IMO.

Your cell delta V does actually look good. Not sure how you have set up the Balance parameters on the Param Protection page. That could be an issue as well...

BUT... your MOS fault is concerning. Have you talked to Basen Green tech support?

Lastly, you also have to suspect something with the inverter or settings there so make sure all that is good. Again, if you charge the pack correctly from an external power supply (not the inverter solar charger), then there might be an issue with how the inverter is charging the pack.

 

[PhotonionV]

OK first problem:

You didn't top balance your cells before putting the pack into service.
So what I would do (if not too late) is get a benchtop power supply (60V - 5A or higher) and do a proper top balance.
(search this forum there are many folks that have documented proper top balancing techniques). This can take many hours even days.

Also, you need to understand that the SOC in % as reported by the BMS is often erroneous and not accurate at all, especially when the pack is brand new, first charge... so I would not have gone right to closed loop coms before making sure the pack has been top balanced and brought up to 100% SOC and BMS has reset SOC and capacity.

It looks like you would need to increase your bulk charging voltage to 56.0 to 56.8 at least so as to get the BMS to reset etc...

I would take photos of the BMS protection and alarm parameters pages. But the original BMS parameters should have not been so out of wack as to create these issues IMO.

Your cell delta V does actually look good. Not sure how you have set up the Balance parameters on the Param Protection page. That could be an issue as well...

BUT... your MOS fault is concerning. Have you talked to Basen Green tech support?

Lastly, you also have to suspect something with the inverter or settings there so make sure all that is good. Again, if you charge the pack correctly from an external power supply (not the inverter solar charger), then there might be an issue with how the inverter is charging the pack.

Thanks again Mav for the help and guidance.

I have already contacted BASEN concerning the MOS Fault error and their reply is: "your battery is fully charged, you can now discharge it and use it normally"... I have also attached the screenshot with the error message and the cells @ 3.25V and they keep insisting that everything is fine...

In any case I'll try to get a snapshot of the parameters screen and see if something is really off there. I'll share once I have them.
I'll also consider top-balancing, I need to get a becnhtop power supply though.

I'm thinking of getting a JK BMS that might be easier to set-up... I don't know... I'll keep you updated once I have the parameters screens and - once more- thanks for the precious help and guidance!

 

[Mav986]

So the I believe the BMS is NOT TitanPower but it IS TianPower indeed.

Tianpower Telecom Bms 15s 16s 48v 50a 100a 200a Lifepo4 Battery Management System For Base Station Backup Power Supply. - Buy Backup Power Bms bms Telecom battery Management System lithium Iron Phosphate Bms lfp Bms Product on Alibaba.com

Tianpower Telecom Bms 15s 16s 48v 50a 100a 200a Lifepo4 Battery Management System For Base Station Backup Power Supply. - Buy Backup Power Bms bms Telecom battery Management System lithium Iron Phosphate Bms lfp Bms Product on Alibaba.com

www.alibaba.com

Trying to find out what is the brand of the 2A Active Balancer though...

 

[Ersus]

I bought a assembled 30kWh battery from Basen. The SOC is also jumping but mostly if the battery is reaching full / higher voltage.
I did read on the forum that also other BMS systems can have a lot of trouble. Its my first build with Victron... But The Basen Battery worked out of the box with Pylon protocol on the Victron system.

 

[Mav986]

So I spent the last couple weeks babysitting the new BasenGreen DiY battery to try to get it perfectly top balanced.
In then end, I got it perfectly balanced at 0.005V delta. The trick was to monitor the cell with highest voltage and make sure I kept the inverter charge current to less than 2a or so to prevent tripping UVP. I also had to increase the full charge protection voltage setting to 57.2 because it would trip it as well at 56.8. Then I left it there overnight at 56.8V float. These are the REPT 280aH cells and I'm pretty happy with them. I had to adjust the capacity up to 300aH to match the performance... So these cells are more like 300aH.