{"product_id":"jkbms-smart-bms-4s-8s-40a-0-4a-active-balance-built-in-bluetooth-with-rs485-pcb-battery-protection-board-li-ion-lifepo4-lto-battery-pack-jk-bd4a8s4p","title":"JKBMS JK-BD4A8S4P | 40A BMS for RV, Marine \u0026 Portable Power | 3S-8S LiFePO4 Li-ion | Bluetooth + Optional RS485\/CAN","description":"\u003ch2\u003eCompact \u0026amp; Lightweight for Mobile Power — JKBMS JK-BD4A8S4P 40A Smart BMS for 3S–8S\u003c\/h2\u003e\n\n\u003cp\u003eThe JK-BD4A8S4P is a compact 40A BMS for LiFePO4, Li-ion, and LTO battery packs — designed for RV auxiliary batteries, marine electronics, portable power stations, and light backup power applications where size and weight matter. Bluetooth monitoring is built in; RS485 and CAN are available as optional add-ons.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible chemistries: LiFePO4 \/ Li-ion \/ LTO\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eJK-BD4A8S4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Configuration\u003c\/td\u003e\n\u003ctd\u003e3S–8S (LiFePO4 \/ Li-ion) · 7S–8S (LTO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current\u003c\/td\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Balance Current\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Communication\u003c\/td\u003e\n\u003ctd\u003eBluetooth + UART (LCD display port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Add-ons\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4, Li-ion, LTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-charge, Over-discharge, Over-current, Short-circuit, Over\/Under-temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: LTO (Lithium Titanate) cells require a minimum of 7S configuration.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eVoltage Platform \u0026amp; Load Class — Where This BMS Fits\u003c\/h2\u003e\n\n\u003ch3\u003e📊 3S–8S (LiFePO4 \/ Li-ion) — Light Load Applications\u003c\/h3\u003e\n\u003cp\u003eThe 3S–8S platform covers RV auxiliary batteries, marine electronics, portable power stations, and light backup power systems. At 40A, this BMS is sized for light-load applications — powering lighting, small appliances, and electronics rather than high-draw inverters or motors.\u003c\/p\u003e\n\n\u003ch3\u003e🔋 7S–8S (LTO) — Lithium Titanate Configuration\u003c\/h3\u003e\n\u003cp\u003eFor LTO chemistry, this BMS supports 7S–8S configurations, offering superior cycle life and low-temperature performance for demanding environments.\u003c\/p\u003e\n\n\u003ch3\u003e⚡ 0.4A Active Balancing — Cell Health for Light-Duty Packs\u003c\/h3\u003e\n\u003cp\u003eActive balancing continuously transfers energy between cells, keeping your pack balanced through every cycle — more usable capacity and longer pack life compared to passive alternatives.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWho Is This BMS For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🛥 \u003cstrong\u003eRV auxiliary battery systems\u003c\/strong\u003e (light load)\u003c\/li\u003e\n\u003cli\u003e⛵ \u003cstrong\u003eMarine electronics battery banks\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e🔦 \u003cstrong\u003ePortable power stations\u003c\/strong\u003e and camping power\u003c\/li\u003e\n\u003cli\u003e🔋 \u003cstrong\u003eLight backup power systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eOEM manufacturers\u003c\/strong\u003e of compact 40A lithium battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCustom Configuration Available\u003c\/h2\u003e\n\u003cp\u003eAll JKBMS products support feature customization for OEM orders — including communication interfaces, protection thresholds, balance parameters, and hardware configuration. \u003cstrong\u003e📩 \u003ca href=\"\/en-eu\/pages\/contact\"\u003eContact us\u003c\/a\u003e to discuss your custom requirements.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eOEM \/ ODM \u0026amp; Bulk Orders\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e📩 For wholesale pricing, MOQ, and custom configurations, please \u003ca href=\"\/en-eu\/pages\/contact\"\u003econtact us\u003c\/a\u003e directly.\u003c\/strong\u003e\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"JK-BD4A8S4P","offer_id":47769218842762,"sku":"JK-BD4A8S4P","price":30.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/BD4A8S4P_b8ab8a1f-92e8-446d-94cb-5d1e383ea52b.jpg?v=1775496330","url":"https:\/\/jkbms-ess.com\/en-eu\/products\/jkbms-smart-bms-4s-8s-40a-0-4a-active-balance-built-in-bluetooth-with-rs485-pcb-battery-protection-board-li-ion-lifepo4-lto-battery-pack-jk-bd4a8s4p","provider":"JKBMS-ESS","version":"1.0","type":"link"}