--- product_id: 690127817 title: "JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P）" brand: "jkbms" price: "€ 182.36" currency: EUR in_stock: true reviews_count: 5 category: "Jkbms" url: https://www.desertcart.sk/products/690127817-jkbms-smart-bms-4s-8s-200a-1a-active-balance-build store_origin: SK region: Slovakia --- # 200A max current Bluetooth + RS485 connectivity 4S-8S battery compatibility JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） **Brand:** jkbms **Price:** € 182.36 **Availability:** ✅ In Stock ## Summary > 🔋 Power Smarter, Live Better — Stay Connected, Stay Charged! ## Quick Answers - **What is this?** JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） by jkbms - **How much does it cost?** € 182.36 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/690127817-jkbms-smart-bms-4s-8s-200a-1a-active-balance-build) ## Best For - jkbms enthusiasts ## Why This Product - Trusted jkbms brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Compatibility:** Supports Li-ion, LiFePO4, and LTO battery types, perfect for RVs, solar setups, UPS systems, and more—future-proof your energy solutions. - • **Ultimate Battery Guardian:** Comprehensive protection against overcharge, overdischarge, overcurrent, short circuits, and temperature spikes keeps your investment safe and sound. - • **Hassle-Free Setup & Support:** Complete with all essential wiring and components plus dedicated 1-year after-sales support to keep you powered without pause. - • **Smart Control at Your Fingertips:** Seamlessly monitor and adjust your battery’s performance via the JK BMS app on Android and iOS with built-in Bluetooth connectivity. - • **Active Balance for Peak Performance:** Advanced active equalization technology extends battery lifespan and maximizes efficiency—because your power deserves the best. ## Overview The JKBMS Smart BMS 4S-8S 200A 1A is a high-performance battery management system designed for Li-ion, LiFePO4, and LTO batteries. Featuring robust safety protections, active balancing, and Bluetooth plus RS485 connectivity, it enables real-time monitoring and control via a mobile app. Ideal for RVs, solar power, and UPS applications, it ensures extended battery life and reliable operation with easy installation and dedicated customer support. ## Description Description:Accessory Type : Battery AccessoriesBrand Name : JKBMSOrigin : Mainland ChinaModel Number : 4S-8S 200ABattery Type : Li-ion,LiFePO4,LTOEqualization Method : Active BalacnceApplications : 3.2V LiFePO4,3.7V Li-ionVoltage : BMS 12V - BMS 24VTemp Sensor : YESBluetooth : Built-inCertification : ISO/ FCC/ RoHS/ PSE/ CEOvercurrent protection : YESOver charge protection : YESOver discharge voltage : YESShort circuit protection : YESTemperature protection : YESBalance function : YESGPS function : according to Cusotmer needCAN communication : according to Cusotmer needRS485 function : according to Cusotmer needJKBMS Brand Promise：Non-human damage、1 year manufacturer，Provide after-sales technical support.Package：BMS【Bluetooth Built-in】*1Wires (70cm)*1Switch(50cm)*1NTC(40cm)*1Screw*4Operate manual*1NOTE：Strictly forbidden to reversely connect the B- and C- cables of the BMS, forbidden to confuse wiring.Wiring must start from B- to B+ and be connected in sequence.Measure the voltage of each battery string with a multimeter to ensure the correct line sequence.Connect B- of BMS to the total negative of Battery Before Pluging the sampling cable into the BMS, Otherwise, the board will be burnt.Please operate in strict accordance with the instruction manual and the guidance of customer service personnel when installing the BMS. If the BMS does not work or is damaged due to misoperation without following the instructions and customer service instructions, customer need to pay for repair or replacement. Review: This is used in my camper in a 12v system. It replaces a Daly BMS that I have never been happy with. With this BMS, I now am able to fully charge my battery, and in fact, I have probably 40% more battery power available. Second, the active balancing of this BMS is far superior. Third, the Daly BMS app always asked for permissions from my phone that I did not feel comfortable giving. This app has no such problems. In summary, Daly is prettier, but the JK functions much better. I wish I bought it a couple of years ago. Review: thank you ## Features - Enhanced Safety: Safeguard your battery with protection against overcharging, overdischarging, overcurrent, short circuits, and temperature extremes. JKBMS Active Equalization extends battery life and enhances performance - Easy Connection: Effortlessly manage your battery with JK BMS mobile app for Android and iOS. Bluetooth connectivity allows you to monitor status, adjust settings, and control charging/discharging from your device - Wide Application: This versatile BMS works with Li-ion, LiFePO4, and LTO batteries. Ideal for RV, Solar Panel, and UPS Power Supply and so on, it offers seamless integration and top performance - After-Sales Support: If you have any questions or concerns, please contact us through your order page. We are committed to providing assistance and ensuring your satisfaction with our 1-year support - Packing List: Includes Smart BMS (JK-B1A8S20P) * 1,Wires (70cm) * 1,Switch (50cm) * 1,NTC (40cm) * 1,Screws * 4,Operate manual * 1,(RS485 converter not included).Everything you need for setup and operation ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D14FT2M5 | | Best Sellers Rank | #184,050 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #828 in Cordless Tool Accessories | | Brand | JKBMS | | Color | JK BMS | | Customer Reviews | 4.8 4.8 out of 5 stars (12) | | Input Voltage | 24 Volts | | Item Dimensions | 15.3 x 12.6 x 1.8 centimeters | | Item Weight | 0.77 Pounds | | Manufacturer | JKBMS | | Mfr Part Number | B27028 | | Model Number | JK-B1A8S20P | | Output Voltage | 24 Volts | | Plug Type | Micro USB | | Unit Count | 1.0 Count | ## Product Details - **Brand:** JKBMS - **Colour:** JK BMS - **Input voltage:** 24 Volts - **Item dimensions L x W x H:** 15.3 x 12.6 x 1.8 centimeters - **Item weight:** 0.77 Pounds ## Images ![JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） - Image 1](https://m.media-amazon.com/images/I/61MG8KaTEOL.jpg) ![JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） - Image 2](https://m.media-amazon.com/images/I/717lPmuJvOL.jpg) ![JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） - Image 3](https://m.media-amazon.com/images/I/711kYv7s2ZL.jpg) ![JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） - Image 4](https://m.media-amazon.com/images/I/81wa-Vn61oL.jpg) ![JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） - Image 5](https://m.media-amazon.com/images/I/71Hep4gTFiL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by O***C on 17 August 2025* This is used in my camper in a 12v system. It replaces a Daly BMS that I have never been happy with. With this BMS, I now am able to fully charge my battery, and in fact, I have probably 40% more battery power available. Second, the active balancing of this BMS is far superior. Third, the Daly BMS app always asked for permissions from my phone that I did not feel comfortable giving. This app has no such problems. In summary, Daly is prettier, but the JK functions much better. I wish I bought it a couple of years ago. ### ⭐⭐⭐⭐⭐ Review *by K***T on 8 December 2025* thank you ### ⭐⭐⭐⭐ Review *by G***S on 24 June 2025* I'm not a professional and am still learning how to maneuver and use these types of products. However, this one has worked really well. I've only had a few mishaps recently and I've had it for months. Small error indications for over voltage that can be resolved easily with a small reset. I blame myself as well cause I barely clean these and there was quite a build up. So overall I would recommend 9/10. ## Frequently Bought Together - JKBMS Smart BMS 4S-8S 200A 1A Active Balance Build-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack（JK-B1A8S20P） - Highwings High-Speed 4K HDMI Cable 25 FT, 18Gbps 2.0 Braided HDMI Cord, 4K HDR,HDR10,HDCP 2.2,ARC,Video 4K Ultra HD,2160p,HD 1080p,3D, Compatible with Roku TV/HDTV/PS5/Blu-ray - 128 RGB LED Ring 128 X WS2812 5050 Full Color with Integrated Drivers 128 Bits forArduino Raspberry Pi ESP8266 Nodemcu DC5V --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/690127817-jkbms-smart-bms-4s-8s-200a-1a-active-balance-build](https://www.desertcart.sk/products/690127817-jkbms-smart-bms-4s-8s-200a-1a-active-balance-build) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-05-17*