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Basen Green DIY Case 48V V2

So sorry for not posting sooner, was busy travelling a lot in the last month. So I got the units, assmbled them and got them into use. The manual is a bit crap, but they also had a video so two combined I was able to build it up. In my unit it also has an active balancer so I think there are different versions out there and it also has I think a proper cells placement as all busbars are the same length. I've added pics from during assembly.

The default settings of course were a bit crap. First off when trying to discharge below 20% it started to oscillate around 16% range. That was cured by a firmware update I got from Basen. Then it started to oscillate at ~4% range. The reason of course was that the BMS parameters were weird. Their default values seem decent and match my MB31 cells, but the actual values when read from BMS were off by a lot (weirdly high under voltage alarm in comparison to setpoints, same for over voltage). After I saved those parameters manually to proper ones the battery is now behaving nicely with a discharge to 0% meaning around 2.8V and 100% is 3.55V, which is well within the 2.5V-3.65V for the cell. I guess I won't push it beyond that.

Haven't had too many cycles yet after I reconfigured the BMS parameters so can only report after a week on how this progresses.
 

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Two BasenGreen 48V 314Ah installed tonight in parallel with 3x64V 100AH EG4 LL
18kPV

BMS is "Titanpower". Haven't attempted to have closed loop comm with 18kPV yet.

Active balancing, working great, installation was not bad. Very heavy, three guys moving them into place.
 
So sorry for not posting sooner, was busy travelling a lot in the last month. So I got the units, assmbled them and got them into use. The manual is a bit crap, but they also had a video so two combined I was able to build it up. In my unit it also has an active balancer so I think there are different versions out there and it also has I think a proper cells placement as all busbars are the same length. I've added pics from during assembly.

The default settings of course were a bit crap. First off when trying to discharge below 20% it started to oscillate around 16% range. That was cured by a firmware update I got from Basen. Then it started to oscillate at ~4% range. The reason of course was that the BMS parameters were weird. Their default values seem decent and match my MB31 cells, but the actual values when read from BMS were off by a lot (weirdly high under voltage alarm in comparison to setpoints, same for over voltage). After I saved those parameters manually to proper ones the battery is now behaving nicely with a discharge to 0% meaning around 2.8V and 100% is 3.55V, which is well within the 2.5V-3.65V for the cell. I guess I won't push it beyond that.

Haven't had too many cycles yet after I reconfigured the BMS parameters so can only report after a week on how this progresses.
Someone said don't stand them up like that. The bottom batteries will get too much weight on them.
 
Also the cells are recommended to have compression somewhat :) The case wasn't as tight as I had assumed. As the batteries came also with the same isolator as the case I put the isolators double, only then did I get any kind of compression when attaching the front. Otherwise the batteries were somewhat free to move.
 
I have an off the grid system with a 12kW Sol Ark inverter, solar panels, and a battery bank. I just assembled this DIY from Basengreen, I want to add it to my system . I wired it up in parallel with my older battery bank. I'm getting an error. Any advice? Thanks.
 
I have an off the grid system with a 12kW Sol Ark inverter, solar panels, and a battery bank. I just assembled this DIY from Basengreen, I want to add it to my system . I wired it up in parallel with my older battery bank. I'm getting an error. Any advice? Thanks.
I also have a Sol Ark 12K with 6 AG4 batteries, I added a 15K Basengreen, all batteries are open loop, so far the Basengreen balancing works good, but the VOC is way off sometimes, Sol Ark and AG4 agrees on VOC but usually Basengreen is 20% or more off of what Sol Ark and AG4 show. For that reason I will not connect it to Sol Ark unless they fix the VOC with software updates.
In terms of support, I ordered a 2nd battery kit with cells, the balancing circuit had a bulging electrolytic cap for the last couple of weeks I try to resolve that, initially I was told this board is not part of the kit when I show them the picture I was told that I misswired the system which I did not.
I am planning to get 10 more battery kits with cells for friends and neighbors but it will not be Basengreen especially with the support they have.
 
I also have a Sol Ark 12K with 6 AG4 batteries, I added a 15K Basengreen, all batteries are open loop, so far the Basengreen balancing works good, but the VOC is way off sometimes, Sol Ark and AG4 agrees on VOC but usually Basengreen is 20% or more off of what Sol Ark and AG4 show. For that reason I will not connect it to Sol Ark unless they fix the VOC with software updates.
In terms of support, I ordered a 2nd battery kit with cells, the balancing circuit had a bulging electrolytic cap for the last couple of weeks I try to resolve that, initially I was told this board is not part of the kit when I show them the picture I was told that I misswired the system which I did not.
I am planning to get 10 more battery kits with cells for friends and neighbors but it will not be Basengreen especially with the support they have.
Where are you thinking buying from next?

I think I still want Basengreen cases and get the batteries elsewhere. I hear about Amy Wan (search forum for her) but I don't think her store has 314Ah batteries right now.

Two of my DIY Basengreen have been working for a few days now. I guess I'm lucky.

Have you see this dude https://jag35.com/

He has 314Ah, for 32 cells and factoring the cases, it would be $1k higher than from Basengreen.
 
Where are you thinking buying from next?

I think I still want Basengreen cases and get the batteries elsewhere. I hear about Amy Wan (search forum for her) but I don't think her store has 314Ah batteries right now.

Two of my DIY Basengreen have been working for a few days now. I guess I'm lucky.

Have you see this dude https://jag35.com/

He has 314Ah, for 32 cells and factoring the cases, it would be $1k higher than from Basengreen.
I already ordered one unit from https://www.alibaba.com/product-det...a2756.order-detail-ta-ta-b.0.0.2d552fc20iXpYB with 302 cells, the cost came a bit lower than Basengreen. It has a JK BMS and a few more features than Basengreen.
 
I've got 3 of the Basen Green DIY's hooked up to my two EG4 18kpv inverters.
All open loop communication... Can't get the closed loop to work yet..

Anyway, I'm not sure if it's an EG4 thing or a Novice Greg thing, but the batteries are showing 0% SOC on their displays when I get down to 50 volts on the inverter's displays...
I know that I'm using the full 43000+/- watts - So they really are getting down there...

I've been charting it for a couple days - And comparing the voltage reading on the Battery display to the inverter display - Voltages are about the same...

Something I'm overlooking or ignorant to?
 
I've got 3 of the Basen Green DIY's hooked up to my two EG4 18kpv inverters.
All open loop communication... Can't get the closed loop to work yet..

Anyway, I'm not sure if it's an EG4 thing or a Novice Greg thing, but the batteries are showing 0% SOC on their displays when I get down to 50 volts on the inverter's displays...
I know that I'm using the full 43000+/- watts - So they really are getting down there...

I've been charting it for a couple days - And comparing the voltage reading on the Battery display to the inverter display - Voltages are about the same...

Something I'm overlooking or ignorant to?
Well that sucks.
Maybe replace all BMS with a brand that works. I'm on open loop comm too. I got tired of trying to get 18kPV to talk to my EG4-LL
 
Did finally get my Basen Green batteries to communicate with my paralleled EG4 18kpv's, and I ordered 3 more batteries

Anyway, here's a link to the thread where I cover what I did (and didn't do) to get them talking - In case this can help someone else

 
Can anybody confirm whether this kit will heat the batteries? I ask only because on their website under the BMS section they suggest it does heating and cooling. Does that mean heaters can be wired into the BMS?

heat.jpg
 
Guys,

Anyone order from Basen Green? I stumbled across them on Projects with Everyday Dave on Youtube (
) and was impressed with the pricing and mainly how it was extremely cost effective to build. Any thoughts on the company or quality of the case? Safety is another concern on my end as well. Another question would be how to rack mount these behemoths.
Just got my 48volt V2 put together with 314 amp hour batteries, case arrived damaged. When I plugged in the battery equalizer it smoked and I cannot log into the BMS. The 888888 password does not work. Basen green tech has been of little assistance, I'm trying to figure out which PC software to download now. I'm hooking it to my 6000 XP with an eg4 280 indoor amp hour battery already hooked up.Tap on a clip to paste it in the text box.1000001039.jpg1000000058.jpg
 
I ordered one in July and assembled it 2 weeks ago. The assembly was easy. But I could not make it communicate with my Inverter with the CAN bus. I checked with my oscilloscope and could not see anything out of the CAN port.
I tried the Lead Acid mode on my inverter (Sofar Solar), but it's not great because the inverter cuts charging too early and I could not use the full SOC of the battery.
Then I took an old Raspberry Pi and plugged in a USB-RS485 adapted to the Basengreen BMS port, a USB-CAN adapter to the Inverter CAN port. I reverse engineered Basengreen protocol to extract the data from the BMS and used SMA CAN protocol to push a couple of CAN packets to the inverter every second. It has been working flawlessly for 1 week now. The bonus is that I can push all the data to a MQTT / Influx / Grafana and get some details graph with a resolution of 1 second. This might deserve a dedicated thread if some people are interested in more details.
I also designed a custom PCB to do all this more elegantly/permanently without the Raspberry Pi. It's arriving tomorrow.

When I discharge to 0% SOC, I end up with the cells in the range 3.01~3.04V. There is apparently no balancing a low SOC. It stayed for 10 hours with exactly this same voltage spread.

I charged only twice to 100% (yesterday and today). Yesterday it stopped with the cells in the range 3.46~3.66V and today it was 3.52-3.66V. So with only 2 data points I suppose I see the effect of the balancer here. I'll see in the coming days if the spread decreases.

I attached 4 days of graphs (with some, now fixed, minor glitches on the cell voltages due to my reverse engineering).

I saw 1 jump of SOC from 4.19% to 1.00%. But as it was the first cycle of the cells I won't blame the BMS for that. Appart from that the data looks coherent with what the inverter reports. I'll soon have my inverter data pushed to my MQTT/Influx, so that will be easy to compare data and spot the discrepancies.
Hello. Have you shared somewhere your reverse engeenering of basengreen protocol on github or somewhere else?
 
Hello. Have you shared somewhere your reverse engeenering of basengreen protocol on github or somewhere else?
New to the DIY solar scene. Jumped in with one of these batteries and a 6000XP. Their support misunderstood my question and sent me these instructions for closed loop communication. Straight from Basengreen hope it helps

1733884527141.png
 
So sorry for not posting sooner, was busy travelling a lot in the last month. So I got the units, assmbled them and got them into use. The manual is a bit crap, but they also had a video so two combined I was able to build it up. In my unit it also has an active balancer so I think there are different versions out there and it also has I think a proper cells placement as all busbars are the same length. I've added pics from during assembly.

The default settings of course were a bit crap. First off when trying to discharge below 20% it started to oscillate around 16% range. That was cured by a firmware update I got from Basen. Then it started to oscillate at ~4% range. The reason of course was that the BMS parameters were weird. Their default values seem decent and match my MB31 cells, but the actual values when read from BMS were off by a lot (weirdly high under voltage alarm in comparison to setpoints, same for over voltage). After I saved those parameters manually to proper ones the battery is now behaving nicely with a discharge to 0% meaning around 2.8V and 100% is 3.55V, which is well within the 2.5V-3.65V for the cell. I guess I won't push it beyond that.

Haven't had too many cycles yet after I reconfigured the BMS parameters so can only report after a week on how this progresses.
Where can I find the software that lets you changed the BMS parameters? The only software I have found from them let's you read not write parameters
 
From my VERY novice experience so far. I downloaded the same software everyday dave used on his BMS and the config screen is now blank. No parameters are editable from what I can tell.
 
Just got my 48volt V2 put together with 314 amp hour batteries, case arrived damaged. When I plugged in the battery equalizer it smoked and I cannot log into the BMS. The 888888 password does not work. Basen green tech has been of little assistance, I'm trying to figure out which PC software to download now. I'm hooking it to my 6000 XP with an eg4 280 indoor amp hour battery already hooked up.Tap on a clip to paste it in the text box.View attachment 262027View attachment 262029
Finally got the BMS basen green software downloaded and opened And in config. There's no place to enter the password to unlock it, just like I can't unlock it through the display interface. They told me that if I downloaded the software I would be able to and cannot. I'm really pissed!
 

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Finally got the BMS basen green software downloaded and opened And in config. There's no place to enter the password to unlock it, just like I can't unlock it through the display interface. They told me that if I downloaded the software I would be able to and cannot. I'm really pissed!
I'm an early adopter, I have the V1 without the breaker, and while it has given me some trouble I did manage to get it to work to my liking. It did also need a software update I got from them over WhatsApp.

This is really badly designed and counter-intuitive, but, theres a very small fieldbox that I do not see on your screen but that is because it is likely minimized. Maximize the screen and you should be able to see it. It will be located at the bottom right corner (see below)

Screenshot 2024-12-13 082350.png

Type in the password 888888 and it will show up as *'s. Once filled in, the settings will appear, and you will be able to change the settings.
 
I'm an early adopter, I have the V1 without the breaker, and while it has given me some trouble I did manage to get it to work to my liking. It did also need a software update I got from them over WhatsApp.

This is really badly designed and counter-intuitive, but, theres a very small fieldbox that I do not see on your screen but that is because it is likely minimized. Maximize the screen and you should be able to see it. It will be located at the bottom right corner (see below)

View attachment 262675

Type in the password 888888 and it will show up as *'s. Once filled in, the settings will appear, and you will be able to change the settings.
Thank you, that's what it was. I could barely see the top line of where you enter the passcode. Changing resolution didn't help but was finally able to get the code entered and parameters changed.1000001282.jpg
 
Thank you, that's what it was. I could barely see the top line of where you enter the passcode. Changing resolution didn't help but was finally able to get the code entered and parameters changed.View attachment 262848
This doesn't look healthy :D Either you have some weird settings that it can't read the values properly or ... There are different passcodes for being able to write to different locations. I've not had to do it now for a while so can't remember, but I think it was 8888 and 6666 or was there a third one as well. I know I needed a different one to change the capacity (defaulted to 280Ah, I installed MB31, which is 314Ah).
 

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