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diy solar

JKBMS Inverter Edition Problems/Issues | No Support / Help to fix major issues. - DO NOT BUY ! Warning (as of Oct.12.2024)

This is my YouTube email which pretty much every solar company has tried to contact at one point in the past. Not a single jkbms email:

Screenshot_20240816_122237_Gmail.jpg
 
Why not use pace BMS? I thought they were better. Active balancing is another additional fault point. Especially for large packs, there no benefit. Why support jk bms?
 
houseofancients said:
Pacebms ( sok, jakiper)
Seplos

Both have good comms, but passive balancing.
Due to victron's way of implementing comms and seperated chargers and inverters may require specific setting

Both solid as a rock
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Exactly. Let's use pace BMS. Passive dissipative balancers are superior. Pace communication is solid too. Why waste our time with these jk BMS. I don't think I've ever used one before.
 
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Actually the active balancer has been rather impressive. The older model JK has kept my battery in better balance than my Overkill batteries.
 
Will Prowse said:
Exactly. Let's use pace BMS. Passive dissipative balancers are superior. Pace communication is solid too. Why waste our time with these jk BMS. I don't think I've ever used one before.
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I prefer seplos..
With a 4a neet active balancer , so far after a year under 2 hours run time, so if properly top balanced and good cells, a passive balancer should do just fine

But to each their own
 
JJJJ said:
Actually the active balancer has been rather impressive. The older model JK has kept my battery in better balance than my Overkill batteries.
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What's the voltage differential before and after, and are you using the same cells as before?
 
Brucey said:
I don't know if you've been keeping track but many owners of the eg4 lifepower4s struggle with battery balance issues. Which could prob be easily resolved if they had active balancing.
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Or the BMS setup correctly

And to add..
Cell being top balanced properly before the batteries are send out
 
Brucey said:
I don't know if you've been keeping track but many owners of the eg4 lifepower4s struggle with battery balance issues. Which could prob be easily resolved if they had active balancing.
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No, that's a problem with the cells. Even a 104kWh Tesla pack uses small passive dissipative balancers. Active balancers are completely unnecessary and that's a fact. And just the design of the circuit increases susceptibility of fault over time. There's no benefit of that added complexity.

Maybe that's why signature solar is having another company build that pack now. I just learned of that last week.
 
I'm glad Steve started this thread and is documenting all of these faults. Same with Andy from off-grid garage. And they're not responding to anybody. Or fixing said issues. They are not located in America so they don't seem to really care what we have to say.

I think we should get in contact with Pace BMS and see if they can make a model with more features.

We need some solutions now. We know what the problem is and we have proven it. What other solutions do you guys have?
 
I don't care if your battery is 100 or a 1000kWh, you don't need active balancing. I cover this in so many videos and proved it with testing multiple times. It's completely unnecessary and increases chance for fault.

If you have good cells, balancing should only be triggered every few months. And a small passive dissipative balancer is more than enough to get the job done. You don't need active balancing.

So the last thing that we need is inverter communication protocol compatibility. And I think Pace BMS can get us there.
 
Will Prowse said:
I'm glad Steve started this thread and is documenting all of these faults. Same with Andy from off-grid garage. And they're not responding to anybody. Or fixing said issues. They are not located in America so they don't seem to really care what we have to say.

I think we should get in contact with Pace BMS and see if they can make a model with more features.

We need some solutions now. We know what the problem is and we have proven it. What other solutions do you guys have?
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Or seplos..
You know their extremely popular Mason 280 diy kit was actually developed by a diysolar forum member from France ?
 
houseofancients said:
Or maybe even better..
Contact Stewart pittaway of diybms..
His hardware and software design is completely opensource, and from what I read and have seen works extremely well
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Except that is really hard to consistently "purchase". He closed the "store" again and parts are frequently not in stock if you try to have them built yourself.
 
rhino said:
Except that is really hard to consistently "purchase". He closed the "store" again and parts are frequently not in stock if you try to have them built yourself.
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And that's why , he ( and others wanting to use his stuff) orders in small quantities..
Imagine what happens if a 1000 or more are ordered .
That would mean it make sense for a supplier to keep stock readily available ( unless something like covidus interruptus happens again)
 
Will Prowse said:
No, that's a problem with the cells. Even a 104kWh Tesla pack uses small passive dissipative balancers. Active balancers are completely unnecessary and that's a fact. And just the design of the circuit increases susceptibility of fault over time. There's no benefit of that added complexity.

Maybe that's why signature solar is having another company build that pack now. I just learned of that last week.
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The lifepower4 or the LL v.2 or both?
 
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