--- product_id: 690127817 title: "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: "764.92 DT" currency: TND in_stock: true reviews_count: 5 category: "Jkbms" url: https://www.desertcart.tn/products/690127817-smart-bms-4s-8s-200a-1a-active-balance-build-in store_origin: TN region: Tunisia --- # Active balancing for extended battery life Built-in Bluetooth for real-time monitoring 200A max current 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:** 764.92 DT **Availability:** ✅ In Stock ## Summary > 🔌 Power up smartly — your battery’s best friend in the digital age! ## Quick Answers - **What is this?** 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?** 764.92 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/690127817-smart-bms-4s-8s-200a-1a-active-balance-build-in) ## 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 - • **Seamless Smart Control:** Bluetooth-enabled app compatibility for Android & iOS lets you monitor and adjust your battery system effortlessly from your phone—control at your fingertips. - • **Versatile Compatibility:** Supports Li-ion, LiFePO4, and LTO batteries, perfect for RVs, solar setups, UPS systems, and more—future-proof your power solutions. - • **Active Equalization Tech:** Advanced active balancing optimizes cell voltage, boosting battery lifespan and maximizing usable capacity—get more power, longer. - • **Ultimate Battery Guardian:** Comprehensive protection against overcharge, overdischarge, overcurrent, short circuits, and temperature extremes keeps your investment safe and sound. - • **Plug & Play with Confidence:** Complete kit with wires, switch, temperature sensor, and manual plus 1-year dedicated support ensures smooth installation and peace of mind. ## Overview The Smart BMS 4S-8S 200A 1A is a high-performance battery management system designed for Li-ion, LiFePO4, and LTO battery packs. Featuring built-in Bluetooth and RS485 communication, it offers real-time monitoring and control via a dedicated mobile app. With robust protections against overcharge, overdischarge, overcurrent, short circuits, and temperature extremes, plus active cell balancing technology, it extends battery life and enhances performance. Ideal for RVs, solar power, and UPS applications, it comes as a complete kit with a 1-year manufacturer support guarantee. ## 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: Great stuff - 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. Review: JK far superior than Daly - 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. ## 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 | #187,747 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #857 in Cordless Tool Accessories | | Brand | JKBMS | | Color | JK BMS | | Colour | JK BMS | | Customer Reviews | 4.8 out of 5 stars 11 Reviews | | Input Voltage | 24 Volts | | Input voltage | 24 Volts | | Item Dimensions | 15.3 x 12.6 x 1.8 centimeters | | Item Weight | 349 g | | Item dimensions L x W x H | 15.3 x 12.6 x 1.8 centimeters | | Item weight | 349 g | | Manufacturer | JKBMS | | Mfr Part Number | B27028 | | Model Number | JK-B1A8S20P | | Output Voltage | 24 Volts | | 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 ![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) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐ Great stuff *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. ### ⭐⭐⭐⭐⭐ JK far superior than Daly *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. ### ⭐⭐⭐⭐⭐ Easy to set up and even has an activation switch *by K***A on 20 April 2025* Just installed in an SOK 12v 206 Ah that had a bms that stopped working. So happy with this device as setup was pretty quick and directions included would get you there if you have small print read ability but the online downloads are much better. Love the settings as parameters, chemistry and readability are very good but the push button switch makes it so easy to activate. I'm building a new 1200a 12 volt bank and will use more of this type but 100ah ## 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.tn/products/690127817-smart-bms-4s-8s-200a-1a-active-balance-build-in](https://www.desertcart.tn/products/690127817-smart-bms-4s-8s-200a-1a-active-balance-build-in) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-22*