{"product_id":"12v-sodium-ion-bms-4s","title":"12V Sodium-Ion Smart BMS for 4S Packs, JK B2A8S20P, 200A, Bluetooth, 2A Active Balance, Pre-Programmed (NFPP or Layered Oxide)","description":"\u003cp\u003e\u003cstrong\u003eA JK smart BMS set up for sodium-ion before it ships.\u003c\/strong\u003e Most lithium BMS boards ship with LFP or Li-ion limits that cut a sodium pack off early or let it charge past the cell's limit. We program this JK B2A8S20P with a sodium-ion profile for your cells (NFPP or layered oxide), check the cutoffs on our bench, and put a settings card in the box.\u003c\/p\u003e\u003cp\u003eSet up for: 4S sodium-ion packs (12V class), including cold-climate builds. Most 12V inverters cut out at 10.0–10.5 V (2.5–2.6 V per cell) before the BMS limit is reached, so the BMS cutoff is your backstop.\u003c\/p\u003e\u003ch3\u003eWhat we set for you\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePer cell\u003c\/th\u003e\n\u003cth\u003eCharge cutoff \/ resume\u003c\/th\u003e\n\u003cth\u003eDischarge cutoff \/ resume\u003c\/th\u003e\n\u003cth\u003eBalance start\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNFPP 18650 (our cell)\u003c\/td\u003e\n\u003ctd\u003e3.70 \/ 3.60 V\u003c\/td\u003e\n\u003ctd\u003e2.00 \/ 2.20 V\u003c\/td\u003e\n\u003ctd\u003e3.30 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNFPP 160Ah prismatic\u003c\/td\u003e\n\u003ctd\u003e3.45 \/ 3.35 V\u003c\/td\u003e\n\u003ctd\u003e2.00 \/ 2.20 V\u003c\/td\u003e\n\u003ctd\u003e3.30 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayered oxide 18650 (our cell)\u003c\/td\u003e\n\u003ctd\u003e4.00 \/ 3.90 V\u003c\/td\u003e\n\u003ctd\u003e2.00 \/ 2.20 V\u003c\/td\u003e\n\u003ctd\u003e3.40 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayered oxide 32140 10Ah\u003c\/td\u003e\n\u003ctd\u003e3.95 \/ 3.85 V\u003c\/td\u003e\n\u003ctd\u003e2.00 \/ 2.20 V\u003c\/td\u003e\n\u003ctd\u003e3.40 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayered oxide 210Ah prismatic\u003c\/td\u003e\n\u003ctd\u003e3.90 \/ 3.80 V\u003c\/td\u003e\n\u003ctd\u003e2.00 \/ 2.20 V\u003c\/td\u003e\n\u003ctd\u003e3.40 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eEvery charge cutoff sits at or below the cell datasheet maximum. We also set the low-temperature charge limit and pack capacity, then lock the settings with a parameter password so a tap on a preset in the app can't overwrite them. Ask us for the password if you want to change them yourself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePick your cathode, then tell us the cell.\u003c\/strong\u003e NFPP and layered-oxide cells need different limits, and cells within each cathode differ, so add your cell model in the order note. Other cell? We set it from your datasheet.\u003c\/p\u003e\u003ch3\u003eThe hardware: JK B2A8S20P\u003c\/h3\u003e\u003cp\u003eThis is the JK B2A8S20P from JK BMS (Jikong), the smart BMS most DIY Solar Forum builders now use. We buy it direct from the factory, set it up for your cells, and test it on our bench in Michigan before it ships.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/JK-B2A8S20P-datasheet.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eDownload the JK B2A8S20P datasheet (PDF)\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\u003ch3\u003eSpecs\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e200A continuous discharge, 2A active balancing (moves charge from high cells to low cells)\u003c\/li\u003e\n\u003cli\u003eBluetooth app for iOS and Android: live cell voltages, current, temperature and state of charge\u003c\/li\u003e\n\u003cli\u003eUART and display port standard\u003c\/li\u003e\n\u003cli\u003eStays powered down to a 7.5 V pack, so it keeps protecting a 4S sodium pack all the way to its low cutoff\u003c\/li\u003e\n\u003cli\u003eBoard size 152 × 127 × 16 mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJK B2A8S20P BMS with P- and B- terminals\u003c\/li\u003e\n\u003cli\u003eBalance lead harness\u003c\/li\u003e\n\u003cli\u003eTemperature sensors (2 external, 1 on the board)\u003c\/li\u003e\n\u003cli\u003eSettings card with every value we set\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOther cell counts\u003c\/h3\u003e\u003cp\u003eThis listing is set up for 4S. The same board covers 4S to 8S sodium-ion. Building something less common, like 5S, 6S or 7S? Order this listing, put your cell count and cell model in the order note, and we program it for your pack. Not sure it fits? Ask before you order.\u003c\/p\u003e\u003ch3\u003eBuild the rest of the pack\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:8px 0 18px;\"\u003e\n\u003ca href=\"\/en-au\/products\/12v-sodium-ion-battery-charger-4s\" style=\"display:block;flex:1 1 150px;max-width:210px;border:1px solid #e2e2e2;border-radius:8px;padding:8px;text-decoration:none;color:inherit;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/12V-Sodium-Ion-Charger.png?v=1\u0026amp;width=360\" alt=\"12V Sodium-Ion Charger\" loading=\"lazy\" style=\"display:block;width:100%;aspect-ratio:1\/1;object-fit:contain;margin:0 0 6px;border-radius:4px;\"\u003e\u003cspan style=\"display:block;font-weight:600;font-size:14px;line-height:1.3;\"\u003e12V Sodium-Ion Charger\u003c\/span\u003e\u003cspan style=\"display:block;font-size:12px;opacity:.75;margin-top:2px;\"\u003eProgrammed to match\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/en-au\/products\/battery-pack-hardware-kit-280ah?variant=67651856302230\" style=\"display:block;flex:1 1 150px;max-width:210px;border:1px solid #e2e2e2;border-radius:8px;padding:8px;text-decoration:none;color:inherit;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/IMG_4557_jpeg.jpg?v=1\u0026amp;width=360\" alt=\"Battery Pack Hardware Kit, 4S\" loading=\"lazy\" style=\"display:block;width:100%;aspect-ratio:1\/1;object-fit:contain;margin:0 0 6px;border-radius:4px;\"\u003e\u003cspan style=\"display:block;font-weight:600;font-size:14px;line-height:1.3;\"\u003eBattery Pack Hardware Kit, 4S\u003c\/span\u003e\u003cspan style=\"display:block;font-size:12px;opacity:.75;margin-top:2px;\"\u003ePlates, busbars, dividers, covers\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/en-au\/products\/battery-fuse-class-t-110-to-400-amp?variant=43579235467414\" style=\"display:block;flex:1 1 150px;max-width:210px;border:1px solid #e2e2e2;border-radius:8px;padding:8px;text-decoration:none;color:inherit;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/9_FB2-400-7_530x_2x_20f16a8f-78e0-4fdd-acc4-7f0f79ca315f.jpg?v=1\u0026amp;width=360\" alt=\"Class T Fuse, 250A\" loading=\"lazy\" style=\"display:block;width:100%;aspect-ratio:1\/1;object-fit:contain;margin:0 0 6px;border-radius:4px;\"\u003e\u003cspan style=\"display:block;font-weight:600;font-size:14px;line-height:1.3;\"\u003eClass T Fuse, 250A\u003c\/span\u003e\u003cspan style=\"display:block;font-size:12px;opacity:.75;margin-top:2px;\"\u003eAlways fuse the pack\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\u003ch3\u003eHow it ships\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003ePre-order: ships in 4–6 weeks.\u003c\/strong\u003e Our first batch is on the way. Every unit is set up and checked on our bench in Michigan before it ships.\u003c\/li\u003e\u003c\/ul\u003e","brand":"OGSolarStore","offers":[{"title":"NFPP","offer_id":67664702079126,"sku":"BMS-JK8S-200-12-NFPP","price":188.0,"currency_code":"AUD","in_stock":true},{"title":"Layered oxide","offer_id":67664702111894,"sku":"BMS-JK8S-200-12-SIB-LO","price":188.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/12V-Sodium-Ion-BMS-JK.png?v=1793710289","url":"https:\/\/ogsolarstore.com\/en-au\/products\/12v-sodium-ion-bms-4s","provider":"OGSolarStore","version":"1.0","type":"link"}