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Balancing troubles...
#51
Correct, but the hybrid inverters and automatic fuses give pretty good protection.
The equalizer gives some protection also, not so easy to cook an individual cell since it tries to keep the 6P cells similar to the other 6p cells. 
I am going to have, to start with, 20S6P 40Ah LTO pack.

Now I have played with just 6 in series, Diff Cell Voltage 0.004V right now.
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#52
There are no buts... It does not give any protection against individual cell voltages that goes over or under.

The balancer does not give any protection... It have no chance in the world to catch up the current that a high load or short can create.
individual cell level protectection is a must. Therefore is a BMS of some kind a must.


Piglet: Start your own thread for your questions or problems for future things.
The Ultimate DIY Solar and build place
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Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
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#53
(07-03-2019, 06:22 PM)daromer Wrote: Piglet: Start your own thread for your questions or problems for future things.

????  I am sorry, I did not realize that this is Your private thread. Huh


Since You ask, I have no problems for future things. 

I have had a solar system for several years, now 36pcs 300W mono panels, 4 hybrid 5kW Chinese MPPT inverters in three phase,  40kWh AGM right now and building LTO-packs using 40Ah LTOs because they have a very long life compared to the penlight batteries some prefer.

I never had a BMS and have been very happy with everything working beautifully without one.


Now I am testing an active equalizer since it is almost obligatory when using LTOs.
Those who know what very low IR means when charging LTOs, understand this.

This far I think that an active equalizer is very good and does not cost much anything!  
Are You allergic to active equalizers?

/Piglet
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#54
Piglet: this is not my thread but HughF. If you have questions or want to share something that isnt related to the his original question please create your own thread for it. Not sure what your setup have to do with the question regarding BMS or not BMS...

I did not ask anything? I just stated the obvious that a balancer does not protect your battery bank. its just a way to manage them in terms of balancing. Passive or active doesnt matter.
Allergic? I think you should read my answer once more. Just because it have worked for you doesnt make it safe to run without protection. Does it make it more safe to drive your car without seat belt just because you havent crashed?
I know its fully possible to run without BMS. Me among many have tested it. I also know the advantages of having active balancers since I do have that too... Wink

Neither less. If you have further questions or want to share more information start your own thread.
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
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#55
(07-03-2019, 07:35 PM)daromer Wrote: Piglet: this is not my thread but HughF. If you have questions or want to share something that isnt related to the his original question please create your own thread for it. Not sure what your setup have to do with the question regarding BMS or not BMS...

I did not ask anything? I just stated the obvious that a balancer does not protect your battery bank. its just a way to manage them in terms of balancing. Passive or active doesnt matter.
Allergic? I think you should read my answer once more. Just because it have worked for you doesnt make it safe to run without protection. Does it make it more safe to drive your car without seat belt just because you havent crashed?
I know its fully possible to run without BMS. Me among many have tested it. I also know the advantages of having active balancers since I do have that too... Wink

Neither less. If you have further questions or want to share more information start your own thread.

OK, You are right in that. 

/Piglet
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#56
Running a couple of weeks now at 55v absorb with a 20 min absorb time - still nicely balanced, no cells drift up and plenty of spare sun when in float to fill up my Ampera... Now to track down some erroneous issues that are giving me a critical fault once or twice per day, at some odd time of the night.
Korishan likes this post
Current system: 9.6kWh wet Nicad batteries, 16S1P Calb LiFePo4, 210aH, Batrium WM4, Outback vfx3048 inverter, mx60 mppt controller, flexware 500 mounting hardware, 2.4kW solar array, 6kW lister diesel genset.

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