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Let's keep commenting about the bad suppliers such as OYE Store and complacent online business standards that AliExpress has and hopefully google will help get the message out.

JK active balancer gets switched on manually when 16s pack gets to 56V and delta V is > 30mV -50mV maybe X2 /yr aiming for <10mV

I have a standalone 2A 16S JK active balancer that was an add-on to my LiFePo4 300AHr system. This JK active balancer has no ability to turn off below cell voltage of 3.4V, however I have a setting for delta V set to 20mV and this seems to work to allow the active balancer to be not balancing...

For $3200 more you could upgrade to 6500 cycles @ 80%DOD and ? 15yrs warranty. https://greenbanks.com.au/product/green-bank-solar-lifepo4-15-kwh-lithium-battery-48v-280ah-wg48280e-6500-cycles/ But out of stock currently. Can't see any detail about BMS/ cell monitoring/ balancing

@MullerEnergy-Australia feel that Heltec is the way to go

I dont suggest that you directly use the relay logic board connections that connect to the external relay, but set it up as junctek shows for an external relay and use the dry contacts of the external relay to open/close the switch terminals of the heltec capacitor balancer or make/break the B+...

Google 250A BMS muller energy first link

2A 200A JKBMS would be my advice. The active balancer is really only needed to fix up a non perfect setup. In the real world resistance variation by the bus bars and cell internal resistance can put cells out of balance. This is aggravated by large current flows. The JK active balancer in the...

The JK-B2A24S standalone active balancer ( not the JK BMS) has no ability to turn on/off at a set pack or individual cell voltage where as the JK BMS ( BMS +active balancer) does a cell voltage parameter despite both being Jikong. I have raised this issue through various supplier channels, but...

Interesting discussion and some great wisdom shared. Not sure for active balancing the Start Equilibrium Conditions should only be just the pressure difference between cells (delta V) for LiFePO4 sytems. I notice that in some smart active balancers this delta V to start balancing can be set as...

An active balancer enables top balancing of a 16S pack insitu =Seplos BMS + JK Active Balance/ Neey Active Balancer/ Heltec Capacitor balancer $50-$150. The first two have Bluetooth Apps.

The standalone JK active balancers dont have the ability to turn off below 3.4V You can use the equilization voltage setting (delta V) to act as a 3.4V on/off proxy by setting equilization voltage to 20mV this minimises the balancer turning on in the flat of the voltage graph. With this setting...

Only because I can hang out here and gleen knowledge and partake in discussion with others who are true experts.

The relay output on the Junctek Battery Monitor could also be used to trip at desired pack voltage to turn on active balancer. Not used one but appears to have reasonable reviews and available support.

The irony of the increased rooftop fires is due to DC isolators placed on the roof. This was mandated by Australian standards some years back. New Zealand refused to be part of this madness after looking at the European experience.

Here is the youtube where Andy explains that the method the Neely 4A active balancer uses to switch on at say 3.4V is an average cell voltage (ie pack voltage / no of cells) not the first cell to get to 3.4V. He suggests that this may no be ideal in that cells may overshoot before balancing...

I support your attempt to limit your active balancer to balance at greater than 3.4V. Think of it as a system top balance. The deviations of cell voltage in the flat of the curve is not due to cells out of balance but due to current in/out fluctuations. If the active balancer is working in the...

My recollection from my learned mates on this forum is that EVE from last year now make their original labels branded with a "B" for grade B to try and stop resellers upselling them as A (automotive) grade.

here is the link to 48V 100AHR pack on VGlorys website https://www.vglorylibattery.com/with-short-circuit-protection-48v-lifepo4-lithium-battery-7080.html

Each to his own. I was offering a solution for top balancing to the question " how do you top balance after assembly". Also life is not perfect. Cell quality is not perfect and an anticipated lifespan of 10+ years will produce variable degradation. Communication with inverter + passive...

@MullerEnergy-Australia may know all about this but maybe commercial in confidence stuff with JBD?

From recent communication with Hankzor/Jikong "At present, we do not enable the top balancing function for the equalizer." There was nothing said to hint that this maybe a possibility at some stage. Just thinking about your situation where it sounds as though after a year or so your B grade...

Have a Neey 4A active balancer waiting to be added to my 16S LiFePo4 OffGrid system that needs more than a passive balancer. My understanding is the original Neey units did not have the ability to switch off below a set cell voltage. The generation 3 now has this feature ( as of ? 6 months ago)...

As per @Steve_S balancing starts when any cell voltage passes the default "Start Balance Voltage" 3.37V (adjustable) and the voltage difference is greater than default 10mV (adjustable). What you were seeing was a function of the overall charging voltage and what happens as each cell approaches...

All true, consumer pressure seemed to result in firmware/hardware upgrades. The 4th generation Neey 4A may possibly be the Duck's Nuts of add on active balancers for 8 -24S systems, though using current balancing amperage claims between different brands of active balancers may be misleading.

to add to the list of suppliers here in Australia I have had a Deep Cycle Systems 16S 15kWhr LiFePO4 51.2V battery for nearly 2 years now. https://www.deepcyclesystems.com.au/product/pv-series-hybrid-off-grid/ purchased for $10000 - it was a dropin replacement for a 48V Pb Acid 48kWhr bank in...

here is the Redarc Profile for modes A,B,C and LiFePO4 for their BCDC chargers, wish others would follow and produce understandable profiles.

Some active balancers ability to balance is proportional to the voltage difference. So in reality these "active balancers" can hardly push more than passive balancers when dealing with 50mV. Other active balancers like the JKBMS(integrated) and the JK standalone and Neey pulse the rated current...

Went ahead with the deal Amy@Luyuan 4x 105A Eve A Grade, JK BMS 1A 4S + on/off switch comes with a plastic frame for cells/insulation/silicone wire/lugs and a sealable battery box shipped to door (Australia) $433 US + %2.99 for paypal. This DIY build I will do with my son so has a weekend...

Thanks Satmaster2000 for followup. So to summarise there seemed to be an intial version of the JKBMS 4s-8s (?about x20 - according to @Nami) that had DC DC converters that ran hot and the BMS consumed 1600mW causing instability. ( not sure if these were the ones that caused a lot of noise with...