New JK-BMS Firmware 15.30 fixes everything? Well, at least a lot...

JK-BMS has just sent me the brand new firmware 15.30 for their inverter BMS for testing. It is good progress in the right direction with some major fixes. I'm really glad, I have access to one of their engineers again and can work through some of the major issues and complaints about the BMS.

This new firmware fixes the following issues:
- sets the default UTP to realistic values
- shows correct cell type
- fixes the negative current problem
- enables alarm notifications for parallel batteries
- shows details about battery and cell for voltage and temperature
- fixes Bluetooth loophole

Download the new JK Inverter BMS firmware here. (V14 will be coming soon:

JK Inverter BMS, great good, not so great, bad and fantastic again. Still the best on the market.

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[jcgcs]

Great work Andy! Please let JK put all your default settings under the lifepo4 button. Safe everybody a lot of time

[SayWhaaaaaaaaaaaaaaaaaaaaaaat]

JK got lucky to have FREE R&D team such like you.

[danfitzpatrick]

You and a couple other battery, solar, BMS Ytubers are.... and have been at the forefront for bringing the quality of these products UP to an amazing level so that everyone in the world can benefit from you're work. Industry changing really...
Something to be proud of for sure!
Thank you for all you do Andy. (Almost up to 100k!) and for good reason... 🤘

[aukemeijer]

Thank you, Andy, For all your work and the brilliant videos. It makes it so much easier for all of us to choose the right products. Just received 2x EEL battery vertical housing (with JK-PB2A16S20P), 2x “Peter Board” + 32 Gobel Power MB31's and lot's of Victron equipment. All based on the info from your videos. Thank you so much!!

[TrevorFraserAU]

Well done Jikong, Andy, and mostly this community!!!

[wayne]

Thanks Andy, What a great result and you mentioned in the comments "JK will have an import/export function soon" It just keep getting better 👍

[EastLondonKiwi]

Great work Andy getting JK to engage with you again. A feature I'd like to see is the ability to save configurations to an external file, and then upload configurations from an external file. So that you can have your config backed up, as well as making setting up multiple batteries much faster in the configure one, then apply to all others approach. Take care D

[MichaelSchmidt-rngg]

Andy, you made my day! Danke daß Du so hartnäckig drangeblieben bist!🎉

[SunInLithium]

100% soc charging cut out is a big issue for the AIO inverters.

Intrested to see how this is addressed in the next video.

Also, i would really like to see. The heater control logic with its own set points.
Right now, it will turn on at charge UTP and of at charge UTPR. Which results in a constant cycling. Between charging and heating.

[GregOnSummit]

Fantastic Andy and community!! This is giving me the incentive to keep buying. Love the part where the battery ID is shown when using multiples. Awesome Andy all 👍

[leumel]

we really had an impact! thanks a lot Andy for the voice of the community!! 🎉🎉🎉😁😁

[philbrooke-little]

Well done, great result. As a recent convert to JK I do have one observation that it would be nice to address: Most programable BMS have a pack over voltage disconnect as well as a cell over voltage disconnect the JK doesn't seem to have this and everything is done on a cell voltage basis. As I often use the frankenstein approach due to my source of cells this can be a problem. I would normally have a pack charge disconnect of 3.5vpc (56v) and a cell over voltage disconnect of 3.65vpc this gives best balancing performance as it enables the pack to continue charging while the high cell(s) is / are being brought down. If the cell over voltage is set to 3.5v this causes a pack charge disconnect while the other cells may be in a relatively low state of charge and the balancing at this level doesn't last long before the 3.5v cell is down with the others however it is still well out of balance with the result that it never really comes back into balance. This is the situation with the JK BMS and i have to set the cell disconnect voltage a lot higher than 3.5v to get good balancing yet, when balanced, I want to keep it at a pack disconnect of 56v which means I have to constantly change the settings. As this is for propulsion packs on boats they can spend some time at a full level and i prefer this to be 56v rather than around 58v. So, in summary, I think it would be good to have a pack disconnect independent of cell over voltage disconnect. This would then also make it suitable for use in hybrid systems which have an increasing following for those retrofitting lfp to boats with lead acid charging equipment and where the balancing effort is important due to the limited time in normal use that it is available for.

[Carsten-PV-DIY]

Best wishes from Hamburg, Germany. Well done. Great job delivered with the community tackling the issues. 😂❤❤❤❤

[melbuh]

ja! ja! ja! ja! sag niemals Weihnachten und Ostern können also doch auf einen Tag fallen! 🎉🎉🎉
Thank you for your effort, and Thank you JK for listening to us!

[PhilippeCJR]

You cant imagine how happy I am Andy! 3x JK bms + 3x Luyuan diy Box + 3 sets of MB31 on the way!! :D Feels like Christmas already in hot summer Netherlands! jahwohl! 15.30 is available for some days already from the jk site ;)

[tomarq]

Wonderful. I have 5 of the v14s and am awaiting the new firmware.

[bitcointabs]

Thanks for your work with JK! I'm going to test the BMS with SMA (Sunny Island 6.0H-13). According to their marketing material it should work, but we'll see.

[Skypower-Diepenveen]

Fantastic work Andy!!, thanks also to JK for a listening ear and direct approach.

[oguzcav]

Thank you very much for the firmware Andy. Just to let you know that we can still reach DIY Eve batteries with JK with 15KW under 1650 Euros in Europe.

[zonta]

Thank you Andy. I ordered and waiting for the JK inverter bms 2A200A version.