[{"data":1,"prerenderedAt":727},["ShallowReactive",2],{"guide-en-jk-bms-nmc-lto-settings":3,"guides-en":667},{"id":4,"title":5,"body":6,"date":645,"description":646,"extension":647,"keywords":648,"meta":656,"navigation":657,"path":658,"related":659,"seo":663,"stem":664,"updated":665,"__hash__":666},"guides_en\u002Fguides\u002Fjk-bms-nmc-lto-settings.md","JK BMS Settings for NMC and LTO: Safe Per-Cell Values",{"type":7,"value":8,"toc":625},"minimark",[9,13,18,21,34,37,41,44,48,51,55,58,63,66,318,322,325,545,549,558,562,565,569,577,581,585,593,597,600,604,607],[10,11,12],"p",{},"JK BMS settings for NMC and LTO differ from LiFePO4 mainly in voltage. NMC and NCA li-ion cells (3.6 to 3.7 V nominal) charge to at most 4.2 V and are happiest at 4.1 V or lower. LTO cells (2.3 to 2.4 V nominal) charge to at most 2.8 V, and they tolerate cold and fast charging far better than any other lithium chemistry.",[14,15,17],"h2",{"id":16},"how-the-editor-picks-the-chemistry","How the editor picks the chemistry",[10,19,20],{},"JK Preset Studio looks at your Cell OVP and guesses the chemistry. The rule is simple:",[22,23,24,28,31],"ul",{},[25,26,27],"li",{},"Cell OVP of 3.9 V or more: NMC.",[25,29,30],{},"Cell OVP below 3.0 V: LTO.",[25,32,33],{},"Anything in between (for example 3.65 V): LiFePO4.",[10,35,36],{},"The guess only chooses which recommended ranges to show, and you can change it by hand.",[14,38,40],{"id":39},"why-the-top-voltage-matters-for-nmc","Why the top voltage matters for NMC",[10,42,43],{},"Li-ion cells age faster the higher the voltage they sit at. Charging to 4.1 V instead of 4.2 V gives up a small part of the capacity and improves cycle life noticeably. Battery University and Sandia ageing research both point this way. That is why the gentle NMC preset stops at 4.1 V Cell OVP and the hard one uses 4.2 V.",[14,45,47],{"id":46},"why-lto-is-different","Why LTO is different",[10,49,50],{},"LTO cells do not plate lithium easily when charged cold, so many are rated to charge below 0 °C and the temperature limits are much wider than for NMC. They also tolerate deep cycling and high currents. Check your datasheet, because some cells are more conservative.",[14,52,54],{"id":53},"jk-bms-settings-for-nmc-and-lto-per-cell","JK BMS settings for NMC and LTO per cell",[10,56,57],{},"All voltages are per cell. The three levels are the editor presets, and the ranges come from the editor's recommendations.",[59,60,62],"h3",{"id":61},"nmc-values","NMC values",[10,64,65],{},"Sources: Samsung 50E and LG M50LT datasheets, JK manuals, Battery University and Sandia.",[67,68,69,91],"table",{},[70,71,72],"thead",{},[73,74,75,79,82,85,88],"tr",{},[76,77,78],"th",{},"Parameter",[76,80,81],{},"Range",[76,83,84],{},"Hard",[76,86,87],{},"Medium",[76,89,90],{},"Gentle",[92,93,94,112,129,146,162,176,191,206,222,236,250,267,284,301],"tbody",{},[73,95,96,100,103,106,109],{},[97,98,99],"td",{},"Cell OVP",[97,101,102],{},"4.10 to 4.20 V",[97,104,105],{},"4.20 V",[97,107,108],{},"4.15 V",[97,110,111],{},"4.10 V",[73,113,114,117,120,123,126],{},[97,115,116],{},"Cell OVP recovery",[97,118,119],{},"3.90 to 4.10 V",[97,121,122],{},"4.05 V",[97,124,125],{},"4.00 V",[97,127,128],{},"3.90 V",[73,130,131,134,137,140,143],{},[97,132,133],{},"Cell UVP",[97,135,136],{},"2.80 to 3.20 V",[97,138,139],{},"2.80 V",[97,141,142],{},"3.00 V",[97,144,145],{},"3.20 V",[73,147,148,151,154,157,159],{},[97,149,150],{},"Cell UVP recovery",[97,152,153],{},"3.10 to 3.40 V",[97,155,156],{},"3.10 V",[97,158,145],{},[97,160,161],{},"3.40 V",[73,163,164,167,170,172,174],{},[97,165,166],{},"Start balance voltage",[97,168,169],{},"3.90 to 4.00 V",[97,171,128],{},[97,173,128],{},[97,175,128],{},[73,177,178,181,184,187,189],{},[97,179,180],{},"Balance trigger voltage",[97,182,183],{},"0.005 to 0.015 V",[97,185,186],{},"0.010 V",[97,188,186],{},[97,190,186],{},[73,192,193,196,199,201,203],{},[97,194,195],{},"SOC-100% voltage",[97,197,198],{},"3.95 to 4.10 V",[97,200,111],{},[97,202,122],{},[97,204,205],{},"3.95 V",[73,207,208,211,214,217,219],{},[97,209,210],{},"SOC-0% voltage",[97,212,213],{},"2.90 to 3.30 V",[97,215,216],{},"2.90 V",[97,218,156],{},[97,220,221],{},"3.30 V",[73,223,224,227,230,232,234],{},[97,225,226],{},"Cell RCV",[97,228,229],{},"4.00 to 4.15 V",[97,231,108],{},[97,233,111],{},[97,235,125],{},[73,237,238,241,244,246,248],{},[97,239,240],{},"Cell RFV",[97,242,243],{},"3.90 to 4.05 V",[97,245,122],{},[97,247,125],{},[97,249,128],{},[73,251,252,255,258,261,264],{},[97,253,254],{},"Charge OTP",[97,256,257],{},"40 to 45 °C",[97,259,260],{},"45 °C",[97,262,263],{},"43 °C",[97,265,266],{},"40 °C",[73,268,269,272,275,278,281],{},[97,270,271],{},"Charge UTP",[97,273,274],{},"0 to 10 °C",[97,276,277],{},"3 °C",[97,279,280],{},"5 °C",[97,282,283],{},"10 °C",[73,285,286,289,292,295,298],{},[97,287,288],{},"Discharge UTP",[97,290,291],{},"-20 to -10 °C",[97,293,294],{},"-20 °C",[97,296,297],{},"-15 °C",[97,299,300],{},"-10 °C",[73,302,303,306,309,312,315],{},[97,304,305],{},"Charge \u002F discharge C-rate",[97,307,308],{},"none set",[97,310,311],{},"0.7C \u002F 1C",[97,313,314],{},"0.5C \u002F 0.7C",[97,316,317],{},"0.3C \u002F 0.5C",[59,319,321],{"id":320},"lto-values","LTO values",[10,323,324],{},"Sources: Yinlong and Toshiba SCiB data, JK manuals and the DIY Solar Forum. Several LTO ranges are community estimates, so check them against your cell datasheet.",[67,326,327,341],{},[70,328,329],{},[73,330,331,333,335,337,339],{},[76,332,78],{},[76,334,81],{},[76,336,84],{},[76,338,87],{},[76,340,90],{},[92,342,343,358,373,389,405,419,431,446,459,472,485,500,515,530],{},[73,344,345,347,350,352,355],{},[97,346,99],{},[97,348,349],{},"2.60 to 2.80 V",[97,351,139],{},[97,353,354],{},"2.70 V",[97,356,357],{},"2.60 V",[73,359,360,362,365,367,370],{},[97,361,116],{},[97,363,364],{},"2.35 to 2.65 V",[97,366,357],{},[97,368,369],{},"2.50 V",[97,371,372],{},"2.40 V",[73,374,375,377,380,383,386],{},[97,376,133],{},[97,378,379],{},"1.70 to 1.90 V",[97,381,382],{},"1.70 V",[97,384,385],{},"1.80 V",[97,387,388],{},"1.90 V",[73,390,391,393,396,399,402],{},[97,392,150],{},[97,394,395],{},"1.95 to 2.05 V",[97,397,398],{},"1.95 V",[97,400,401],{},"2.00 V",[97,403,404],{},"2.05 V",[73,406,407,409,412,415,417],{},[97,408,166],{},[97,410,411],{},"2.40 to 2.50 V",[97,413,414],{},"2.45 V",[97,416,372],{},[97,418,372],{},[73,420,421,423,425,427,429],{},[97,422,180],{},[97,424,183],{},[97,426,186],{},[97,428,186],{},[97,430,186],{},[73,432,433,435,438,441,444],{},[97,434,195],{},[97,436,437],{},"2.45 to 2.65 V",[97,439,440],{},"2.65 V",[97,442,443],{},"2.55 V",[97,445,414],{},[73,447,448,450,453,455,457],{},[97,449,210],{},[97,451,452],{},"1.80 to 2.00 V",[97,454,385],{},[97,456,388],{},[97,458,401],{},[73,460,461,463,466,468,470],{},[97,462,226],{},[97,464,465],{},"2.50 to 2.70 V",[97,467,354],{},[97,469,357],{},[97,471,369],{},[73,473,474,476,479,481,483],{},[97,475,240],{},[97,477,478],{},"2.40 to 2.60 V",[97,480,357],{},[97,482,369],{},[97,484,372],{},[73,486,487,489,492,495,498],{},[97,488,254],{},[97,490,491],{},"45 to 55 °C",[97,493,494],{},"55 °C",[97,496,497],{},"50 °C",[97,499,260],{},[73,501,502,504,507,510,512],{},[97,503,271],{},[97,505,506],{},"-30 to -5 °C",[97,508,509],{},"-25 °C",[97,511,297],{},[97,513,514],{},"-5 °C",[73,516,517,519,522,525,528],{},[97,518,288],{},[97,520,521],{},"-40 to -30 °C",[97,523,524],{},"-35 °C",[97,526,527],{},"-30 °C",[97,529,527],{},[73,531,532,534,536,539,542],{},[97,533,305],{},[97,535,308],{},[97,537,538],{},"3C \u002F 3C",[97,540,541],{},"2C \u002F 2C",[97,543,544],{},"1C \u002F 1C",[14,546,548],{"id":547},"balancing-on-nmc-and-lto","Balancing on NMC and LTO",[10,550,551,552,557],{},"The voltage curve of NMC and LTO is steeper than LiFePO4, so a small difference in charge shows up as a clear voltage difference over a wide range. The presets start at 3.9 V for NMC and 2.4 to 2.45 V for LTO, with a trigger of 0.010 V. See ",[553,554,556],"a",{"href":555},"\u002Fguides\u002Fjk-bms-balance-settings","JK BMS balance settings"," for how the start voltage, trigger and balance current work together.",[14,559,561],{"id":560},"pack-voltage-and-cell-count","Pack voltage and cell count",[10,563,564],{},"Multiply every per-cell value by the cell count to get the pack value. Common NMC builds are 7S (29.4 V full), 13S (54.6 V) and 14S (58.8 V). A 6S LTO pack reaches 16.8 V at 2.8 V per cell. A 14S NMC pack at 4.2 V per cell can be above the input limit of some 48 V equipment, so set Cell OVP to keep the pack inside what the charger accepts, and set the Cell count to match your pack.",[14,566,568],{"id":567},"the-firmware-chains-still-apply","The firmware chains still apply",[10,570,571,572,576],{},"The JK firmware checks the same order on every chemistry: Cell OVP recovery below SOC-100% voltage below Cell RCV, and Cell UVP below SOC-0% voltage below Cell UVP recovery. Equal values are rejected. All presets above follow these chains. If you edit single values by hand, keep the order or the BMS answers \"This parameter does not apply to the connected device. (Sending failure)\". See ",[553,573,575],{"href":574},"\u002Fguides\u002Fjk-bms-sending-failure","JK BMS sending failure"," for the fix.",[14,578,580],{"id":579},"common-mistakes-and-faq","Common mistakes and FAQ",[59,582,584],{"id":583},"can-i-use-lifepo4-settings-on-nmc-cells","Can I use LiFePO4 settings on NMC cells?",[10,586,587,588,592],{},"No. A Cell OVP of 3.65 V leaves an NMC cell well short of full, and a UVP of 2.5 V is below the safe limit for many NMC cells. Compare with the ",[553,589,591],{"href":590},"\u002Fguides\u002Fjk-bms-lifepo4-settings","LiFePO4 settings"," to see the difference.",[59,594,596],{"id":595},"what-are-good-jk-bms-18650-settings","What are good JK BMS 18650 settings?",[10,598,599],{},"18650 and 21700 cells are usually NMC or NCA, so use the NMC table. Check the datasheet for exact limits, and set Max charge current from the C-rate and pack capacity.",[59,601,603],{"id":602},"can-i-charge-lto-below-freezing","Can I charge LTO below freezing?",[10,605,606],{},"Many LTO cells can, but confirm the lower limit in your datasheet. Never copy an LTO charge UTP onto NMC cells.",[10,608,609,610,614,615,619,620,624],{},"Every parameter is described in the ",[553,611,613],{"href":612},"\u002Fparameters","parameter reference",". Open the ",[553,616,618],{"href":617},"\u002Fpresets","presets page"," for one-click NMC and LTO presets, then ",[553,621,623],{"href":622},"\u002F","connect your BMS or open your .jkcfg"," in the editor to apply them, check the result and write it back.",{"title":626,"searchDepth":627,"depth":627,"links":628},"",3,[629,631,632,633,637,638,639,640],{"id":16,"depth":630,"text":17},2,{"id":39,"depth":630,"text":40},{"id":46,"depth":630,"text":47},{"id":53,"depth":630,"text":54,"children":634},[635,636],{"id":61,"depth":627,"text":62},{"id":320,"depth":627,"text":321},{"id":547,"depth":630,"text":548},{"id":560,"depth":630,"text":561},{"id":567,"depth":630,"text":568},{"id":579,"depth":630,"text":580,"children":641},[642,643,644],{"id":583,"depth":627,"text":584},{"id":595,"depth":627,"text":596},{"id":602,"depth":627,"text":603},"2026-10-02","JK BMS settings for NMC and LTO packs: per-cell OVP, UVP, balance, temperature and C-rate values in three wear levels, plus how the editor detects chemistry.","md",[649,650,651,652,653,654,655],"jk bms settings for nmc and lto","jk bms li-ion settings","jk bms nmc settings","jk bms lto settings","jk bms 6s lto","jk bms cell ovp 4.2","jk bms 18650 settings",{},true,"\u002Fguides\u002Fjk-bms-nmc-lto-settings",[660,661,662],"jk-bms-lifepo4-settings","jk-bms-parameters-explained","jk-bms-balance-settings",{"title":5,"description":646},"guides\u002Fjk-bms-nmc-lto-settings","2026-10-04","tw2XoUjMBJdQNw0Va9OmDC0u09EZ49xWyx5xUh3y1Hg",[668,673,676,680,684,688,691,695,696,700,704,708,712,715,719,723],{"path":669,"title":670,"description":671,"date":665,"updated":672},"\u002Fguides\u002Fjk-bms-bluetooth-browser","Change JK BMS Settings over Bluetooth in Your Browser","Connect to a JK BMS from Chrome or Edge, read every setting, apply a preset and write it back in a safe order with read-back checks. No JK app needed.",null,{"path":555,"title":674,"description":675,"date":645,"updated":665},"JK BMS Balance Settings: Start Voltage, Trigger, Current","JK BMS balance settings explained: start balance voltage, balance trigger voltage, max balance current and the Balancer switch, for LFP, NMC and LTO.",{"path":677,"title":678,"description":679,"date":645,"updated":672},"\u002Fguides\u002Fjk-bms-cell-overcharge-protection-tripping","JK BMS Cell Over Charge Protection Keeps Tripping: Causes and Fix","JK BMS cell over charge protection tripping and releasing every minute? See why a charger set too high causes it, how to tell it from a weak cell, and how to fix it.",{"path":681,"title":682,"description":683,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-detail-log","How to export and read the JK-BMS Detail Log","What the JK-BMS Detail Log contains, how to export it from the app, how to read its events and what the log analysis page tells you about trips and faults.",{"path":685,"title":686,"description":687,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-export-import-settings","Export and Import JK BMS Settings: The .jkcfg File Guide","How to export and import JK BMS settings with the app, what the .jkcfg file contains, why hand edits break it, and how to edit it safely in your browser.",{"path":590,"title":689,"description":690,"date":645,"updated":665},"JK BMS Settings for LiFePO4: 8S and 16S, 280Ah and 314Ah","JK BMS settings for LiFePO4 packs: per-cell voltage, balance, current and temperature values for 8S and 16S with 280Ah and 314Ah cells, in three wear levels.",{"path":692,"title":693,"description":694,"date":645,"updated":672},"\u002Fguides\u002Fjk-bms-log-messages-explained","JK BMS Log Messages Explained: Boot, Time calibration, Protections","What each JK BMS log message means: Boot, Time calibration, APP open charge, protection trips and releases, Discharge On Failed and Unknown Log Code [0].",{"path":658,"title":5,"description":646,"date":645,"updated":665},{"path":697,"title":698,"description":699,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-ocp-scp-settings","JK BMS Overcurrent Protection Settings: OCP and SCP Guide","JK BMS overcurrent protection settings explained: charge and discharge OCP limits, delays, recovery times and SCP, with ranges and sizing for inverters.",{"path":701,"title":702,"description":703,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-parameters-explained","JK BMS Parameters Explained: Every Setting by Group","JK BMS parameters explained in one glossary: cell OVP, OVPR, UVP, UVPR, balance, SOC, RCV and RFV, current and temperature limits, with typical LFP ranges.",{"path":705,"title":706,"description":707,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-password","JK BMS Password: Default Codes, Change and Reset Guide","Your JK BMS password is really two codes: Bluetooth and settings. See factory defaults, how to change them, what to try if one fails, and what to do if lost.",{"path":709,"title":710,"description":711,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-reboots-power-events","JK BMS Reboots and Charge MOS Off: Reading Power Events in the Log","JK BMS reboots or the charge MOS switched off by itself? Learn to read Boot rows and MOS state in the Detail Log and tell expected restarts from real faults.",{"path":574,"title":713,"description":714,"date":645,"updated":665},"JK BMS Sending failure: Causes and Step-by-Step Fix","JK BMS Sending failure on import? See why the firmware rejects settings (voltage chains, write order, SCP delay) and how to fix it step by step.",{"path":716,"title":717,"description":718,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-soc-calibration","JK BMS SOC Calibration: Fix SOC Drift, Jumps and Reset","JK BMS SOC calibration explained: why SOC drifts or jumps, what the SOC-100% voltage and SOC-0% voltage do, and how to set them and recalibrate the pack.",{"path":720,"title":721,"description":722,"date":645,"updated":672},"\u002Fguides\u002Fjk-bms-weak-cell-log","Find a Weak Cell with the JK BMS Log: Trips, Spread and Balance","Find a weak cell in the JK BMS Detail Log: which cell trips first, how wide the spread is at the trip, and whether it is balance drift or a bad cell.",{"path":724,"title":725,"description":726,"date":645,"updated":665},"\u002Fguides\u002Fjk-bms-wire-resistance","JK BMS Wire Resistance: Fix Abnormal Balance Wire Alarm","JK BMS wire resistance explained: what the abnormal resistance of the balance wire warning means, normal values, common causes and how to fix a bad lead.",1791151315732]