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thanks for your reply Frank, you're right, it's a 14S battery, as far as I know, the install is per the manual and wiring diagram for the JK indeed, I have Both the silver coloured cheaper BMS, and the Black 'expensive' type, both behave the same sure, it's not the end of the world, and the...

thanks for your replies, bad connection is probably unlikely as firstly, I know they're all solid, and the whole thing is as cool as a cucumber under the thermal camera. theres 1400 cells in total, and whilst not perfectly in balance across the pack, at the point immediately after UVP cuts the...

Aliespress seller claims that it's not faulty, he says that my balance trigger voltage of 0.005 is to blame, I took this literally from the user manual to suit my particular size of battery. Unfortunately a partial language barrier and a seeming lack of actually wanting to help are the issues...

further tests show the same, pack hits UVP voltage and turns off the pack, BMS turns load back on within 5 seconds whilst massively below UVP-reconnect voltage, load pulls power, BMS shuts off at UVP voltage within 5 seconds and process repeats I tried to contact JK BMS but no reply via contact...

Hi, thanks for your reply, I have two JK BMS, a BD6A17S8P, and B2A20S20P All balance wires and power to the BMS wiring is correct, both checked and verified on the app and by lack of any error messages, balancing works fine, as does Undervoltage Protection what I wrote previously is pretty...

further to this original post, I had a second slightly different JK BMS, I've swapped out the original for this new one, but it works exactly the same, cut off correctly at UVP, but (in the presence of any kind of charger) it just turns back on and doesn't wait for the UVPR, shame for JK, surely...

Forgive me if you've seen my other couple of posts discussing an issue with my JK BMS (both of them) where after correctly cutting off at UVP level (when a small charger is connected during discharge) the BMS turns back on without waiting for the pack to reach UVPR using the charger. I've tried...

I wonder if you can help. I have a basic YZRELB 3000watt intvertex, the type with just an on switch and no settings. My issue is what happens to the inverter when it reaches it low cutoff voltage and a charger / solar is connected to the pack. Imagine a day with variable sunshine or a low...

thanks for your reply, what does a voltage relay board do ? its different to a conventional relay ? I'm very much in the early stages of learning, but I'm so interested and keen, I hope you can forgive my numerous newbie questions, sometimes its the best way to learn

thanks for your reply, the battery capacity is around 75% of what I could typically use in an average day, my solar capacity may keep up with my usage on a sunny day, and my battery capacity would be depleted on a winters day (all hypothetical since the build isn't finished. my primary use is...

Solder ? oh yes, extremely neatly, understand electronics ? not a clue, it's powered by elastictrickery I think ?

you're right, I wonder why the seller on Aliexpress hasn't responded since I said the item, could be faulty ? better brakes can help you stop and possibly avoid and accident and injury to others, having a working seatbelt is just protecting you. If I had defective brakes and seatbelt, which...

Probably one of my issues is that my inverter is rather dumb, in the case of 'wanting to continue charging whilst inverting' the inverter just doesn't know, and can't be programmed to stay off until the voltage in the pack is restored by charging. JK have responded numerous time saying their...

Victron..... I just can't afford that brand :(

Hi, please could I ask your advice, I'm not sure if my device is faulty. for my Li-ion 14S battery pack I set my JK BMS to UVP of 3.0v, it turns off as expected, however turns back on straight away (on App shows 'DISCHARGE OFF' then 'DISCHARGE ON') even though UVPR is set to 3.5v - this...

interesting, I never knew such a thing existed, electronics are absolutely fascinating !

thanks for your reply. it's a 14S / 52v pack, charge voltage is 58.8v if the BMS is to protect the battery and not manage it, what is it that keeps the load disconnected until the charger/solar reaches a sensible voltage to reconnect the load ?

are you sure ? 52V Chemistry: Li-Ion. Configuration: 14s. Max Voltage: 58.8V. Nominal Voltage: 52V. 19 Aug 2022 — Nominal voltage chart for 52V Li-Ion Ebike batteries showing the percentage. 14 Cells x 4.2 Volts/Cell = 58.8 Volts Fully Charged Voltage 58.8V 6A 14S Lithium Battery Charger -...

thanks for your reply, top balance is close, 0.007A I think, granted, it does drift off as the cells discharge, but I'm not convinced this is the cause of the issue, when the BMS turns off due to OVP voltage, all of the other cells are way below the UVP-recovery/restart voltage, yet only as soon...

Thanks Rich. You’ve got UVP and OVP mixed up. It’s the bottom end where the problem lies. You’re right though, but the issue seems regardless of the settings Look at it this way : 1, if inverter has a under voltage cut off, the dumb inverter will continually start back up each time the sun...

Some times you feel like your in over your head ! I’ve just been looking at the user manual for my Epever Tracer AN charge controller (yet to be installed) and whilst it has versions setting for UVP and OVP, it would seem that these setting are for its load terminals which are either intended...

Re your reply above, the inverter itself has no setting, but I think we could take control of its on switch vis the relay / load output terminals of the charge controller ?