--- product_id: 631392471 title: "- Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P)" brand: "jkbms" price: "AR$477838" currency: ARS in_stock: true reviews_count: 10 category: "Jkbms" url: https://www.desertcart.com.ar/products/631392471-smart-bms-8s-24s-24v-72v-150a-2a-active-balance store_origin: AR region: Argentina --- # Active 2A cell balancing Built-in Bluetooth for real-time monitoring 150A max current - Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) **Brand:** jkbms **Price:** AR$477838 **Availability:** ✅ In Stock ## Summary > 🔌 Power up smarter, live longer—your battery’s best ally! ## Quick Answers - **What is this?** - Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) by jkbms - **How much does it cost?** AR$477838 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/631392471-smart-bms-8s-24s-24v-72v-150a-2a-active-balance) ## 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 - • **Plug & Play Setup:** Complete with all essential wiring and switch, this compact 6.38x4.02x0.8 inch board installs easily—get up and running without hassle. - • **Extended Battery Life:** Active 2A cell balancing technology optimizes battery health and performance, ensuring you get the most out of every charge cycle. - • **Seamless Smart Control:** Effortlessly monitor and adjust your battery system anytime via the intuitive JK BMS app with Bluetooth connectivity—control at your fingertips. - • **Versatile Compatibility:** Supports Li-ion, LiFePO4, and LTO batteries across 8S to 24S configurations, perfect for EVs, scooters, power banks, and beyond. - • **Ultimate Battery Guardian:** Comprehensive protection against overcharge, overdischarge, overcurrent, short circuits, and temperature extremes keeps your investment safe and sound. ## Overview The JKBMS Smart BMS JK-B2A24S15P is a high-performance battery management system designed for 24V-72V Li-ion, LiFePO4, and LTO battery packs. Featuring 150A max current, active 2A cell balancing, and built-in Bluetooth with RS485 support, it offers advanced protection and real-time monitoring via a dedicated mobile app. Compact and easy to install, it’s ideal for electric vehicles, scooters, and power banks, backed by a 1-year warranty and responsive after-sales support. ## Description Product description Protection Board Selection FAQ Q: What are "same port" and "different port"? A: For instance, with a 20S 60V 100A protection board, "same port" means your charging negative and discharging negative are connected at the same point (P-). They share a common interface, so both the charging current and discharging current are 100A. On the other hand, "different port" means the charging negative (C-) and discharging negative are separate (P-), connected at different points on the protection board. Thus, the charging and discharging currents can differ—discharging at 100A and charging at 100A. Q: Relationship Between Battery Capacity and Protection Board Current Q: What kind of charger should I choose? A: For lithium batteries, you must use a charger specifically designed for lithium batteries. Never use a lead-acid battery charger, as it could potentially exceed the protection board MOSFET's voltage tolerance, leading to overcharging without protection. For lithium iron phosphate batteries, charger voltage = number of series cells * 3.65V; for ternary lithium batteries, charger voltage = number of series cells * 4.25V. Review: Easy to install, operate, and understand. - Update 2024-12-14: Actually looking like top balancing will recover 20% capacity. Heater puzzle solved. See below for info from JK BMS. The scene: After 6 years, converting two (24v) 8S 200Ah bottom balanced LFP cells to a single 16S 200Ah 52.1V battery. Installed BMS 6 days ago. The good: Super simple install. Connected to app immediately. Clear and easy to read manual (yes, really!) The great: Chugging away at top balancing the pack. At 2A, and as poorly balanced at the top these cells are, it’s made decent progress. Looking like I’ll be able to reclaim an easy 10% MORE capacity from these cells than I’ve ever had. The “Meh”: Can’t figure out WHEN the heater port will activate. CAN cable was missing. Only JK protocol supported CAN menu. Over All Grade: A+ Would I buy it again? Yep, as a matter I already have. If I figure out how to trigger the heater, I’ll update this. If I figure out how to get this to talk to my Victron gear, I’ll update this. I’ve played with pretty every setting. It works as documented. 2024-12-17 JK BMS sent info: Heating Function Activation Conditions: The heating function for charging will be activated when Condition 1 is met, along with Condition 2 or Condition 3. Condition 1: The battery temperature is below the charging low-temperature protection threshold. Condition 2: Heating is manually activated via the APP, without checking the charger status. Once the low-temperature condition is met, heating will begin, which will consume battery power. Condition 3: The charger is detected as being plugged in. This function is related to the hardware of the protection board and the charger, so please confirm the technical specifications before ordering. Heating Film Selection: Step 1: Determine the maximum battery pack voltage. For example, a 20-series LiFePO4 battery has a maximum voltage of 20 × 3.6V = 72V, while a 24-series LiFePO4 battery has a maximum voltage of 24 × 3.6V = 86.4V. Step 2: Calculate the resistance value of the heating film. The resistance value is calculated by dividing the maximum total voltage by the current: Resistance (Ω) = Maximum Total Voltage ÷ 3A. For example, 72V ÷ 3A = 24Ω. Based on this, select a heating film with a resistance close to this value. A suitable heating film specification would be 72V/24Ω/216W. Key Notes for Understanding: Condition 1 (Low-Temperature Protection): The heating function will only be triggered if the battery temperature drops below a certain threshold (often around 0°C to 5°C) to prevent damage to the battery and ensure it remains functional during cold weather conditions. Condition 2 (Manual Activation via APP): This condition allows the user to manually activate the heating function through an app, which will begin heating as soon as the low-temperature condition is met. However, this will drain battery power, which is important to consider in terms of overall efficiency. Condition 3 (Charger Detection): The heating function is also dependent on detecting whether the charger is plugged in. This ensures that the battery is being charged during the heating process, avoiding unnecessary power drain when not connected to a power source. Heating Film Specifications: The heating element (heating film) needs to be carefully selected based on the battery's total voltage and required current. The resistance of the heating film plays a key role in determining how efficiently the heat is generated without exceeding the system's power limits. Review: Exactly as described and very useful - This BMS is truly awesome for the price. When I received the product, the assembly was fairly straight forward if you know what you are doing, if not many videos are available online. After setup they included a QR code for the app. The app is very easy to use and always opens on the page that displays your bank information. As far as initial setup it is very simple and straight forward as you only have to input the manufactures specs into the app and it instantly sets it and allows you to even lock the settings. It also allows for 2A of balancing which really helps to keep your cells balanced quickly. The Bluetooth connection range is also fairly good, as I can connect as I am walking to my car. ## 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 electric vehicles,scooter, and power banks 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-B2A24S15P) * 1,Wires (70cm) * 1,Switch (50cm) * 1,NTC (40cm) * 1,Operate manual * 1,(RS485 converter not included).Everything you need for setup and operation ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D17J36JC | | Best Sellers Rank | #35,131 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #146 in Power Converters | | Brand | JKBMS | | Color | JK BMS | | Customer Reviews | 4.4 out of 5 stars 217 Reviews | | Input Voltage | 72 Volts | | Item Dimensions | 6.38 x 4.02 x 0.8 inches | | Item Weight | 15.2 ounces | | Item dimensions L x W x H | 6.38 x 4.02 x 0.8 inches | | Manufacturer | JKBMS | | Mfr Part Number | JK-B2A24S15P | | Model Number | JK-B2A24S15P | | Output Voltage | 72 Volts | | Plug Type | JST Connector | | Warranty Description | 1 year manufacturer | ## Product Details - **Brand:** JKBMS - **Color:** JK BMS - **Input Voltage:** 72 Volts - **Item Weight:** 0.95 Pounds - **Item dimensions L x W x H:** 6.38 x 4.02 x 0.8 inches ## Images ![- Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) - Image 1](https://m.media-amazon.com/images/I/61fBxtTPI0L.jpg) ![- Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) - Image 2](https://m.media-amazon.com/images/I/71ogWycSCbL.jpg) ![- Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) - Image 3](https://m.media-amazon.com/images/I/711kYv7s2ZL.jpg) ![- Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) - Image 4](https://m.media-amazon.com/images/I/817orlbmFzL.jpg) ![- Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) - Image 5](https://m.media-amazon.com/images/I/71RUeVfyGrL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy to install, operate, and understand. *by N***. on December 13, 2024* Update 2024-12-14: Actually looking like top balancing will recover 20% capacity. Heater puzzle solved. See below for info from JK BMS. The scene: After 6 years, converting two (24v) 8S 200Ah bottom balanced LFP cells to a single 16S 200Ah 52.1V battery. Installed BMS 6 days ago. The good: Super simple install. Connected to app immediately. Clear and easy to read manual (yes, really!) The great: Chugging away at top balancing the pack. At 2A, and as poorly balanced at the top these cells are, it’s made decent progress. Looking like I’ll be able to reclaim an easy 10% MORE capacity from these cells than I’ve ever had. The “Meh”: Can’t figure out WHEN the heater port will activate. CAN cable was missing. Only JK protocol supported CAN menu. Over All Grade: A+ Would I buy it again? Yep, as a matter I already have. If I figure out how to trigger the heater, I’ll update this. If I figure out how to get this to talk to my Victron gear, I’ll update this. I’ve played with pretty every setting. It works as documented. 2024-12-17 JK BMS sent info: Heating Function Activation Conditions: The heating function for charging will be activated when Condition 1 is met, along with Condition 2 or Condition 3. Condition 1: The battery temperature is below the charging low-temperature protection threshold. Condition 2: Heating is manually activated via the APP, without checking the charger status. Once the low-temperature condition is met, heating will begin, which will consume battery power. Condition 3: The charger is detected as being plugged in. This function is related to the hardware of the protection board and the charger, so please confirm the technical specifications before ordering. Heating Film Selection: Step 1: Determine the maximum battery pack voltage. For example, a 20-series LiFePO4 battery has a maximum voltage of 20 × 3.6V = 72V, while a 24-series LiFePO4 battery has a maximum voltage of 24 × 3.6V = 86.4V. Step 2: Calculate the resistance value of the heating film. The resistance value is calculated by dividing the maximum total voltage by the current: Resistance (Ω) = Maximum Total Voltage ÷ 3A. For example, 72V ÷ 3A = 24Ω. Based on this, select a heating film with a resistance close to this value. A suitable heating film specification would be 72V/24Ω/216W. Key Notes for Understanding: Condition 1 (Low-Temperature Protection): The heating function will only be triggered if the battery temperature drops below a certain threshold (often around 0°C to 5°C) to prevent damage to the battery and ensure it remains functional during cold weather conditions. Condition 2 (Manual Activation via APP): This condition allows the user to manually activate the heating function through an app, which will begin heating as soon as the low-temperature condition is met. However, this will drain battery power, which is important to consider in terms of overall efficiency. Condition 3 (Charger Detection): The heating function is also dependent on detecting whether the charger is plugged in. This ensures that the battery is being charged during the heating process, avoiding unnecessary power drain when not connected to a power source. Heating Film Specifications: The heating element (heating film) needs to be carefully selected based on the battery's total voltage and required current. The resistance of the heating film plays a key role in determining how efficiently the heat is generated without exceeding the system's power limits. ### ⭐⭐⭐⭐⭐ Exactly as described and very useful *by D***O on March 4, 2026* This BMS is truly awesome for the price. When I received the product, the assembly was fairly straight forward if you know what you are doing, if not many videos are available online. After setup they included a QR code for the app. The app is very easy to use and always opens on the page that displays your bank information. As far as initial setup it is very simple and straight forward as you only have to input the manufactures specs into the app and it instantly sets it and allows you to even lock the settings. It also allows for 2A of balancing which really helps to keep your cells balanced quickly. The Bluetooth connection range is also fairly good, as I can connect as I am walking to my car. ### ⭐⭐⭐⭐⭐ Works well so far *by J***M on May 12, 2026* Works well so far. Not a ton of bluetooth range ~8ft inside the RV ~20ft outside. (I know the location is not helping but i had to mention it). And I wish the app had a nice SOC panel on the home page like Daly does. No issues with the app so far it feels simple and reliable nothing fancy. However after building this 12v 4s battery i think i would just go to a "dumb" drop in heated LFP battery with a nice warranty especially if space isn't a huge deal. ## Frequently Bought Together - JKBMS Smart BMS 8S-24S 24V-72V 150A 2A Active Balance BMS Built-in Bluetooth with RS485 PCB Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B2A24S15P) - JKBMS Accessory 4.3 Inch LCD Touch Screen Monitor with Switch for JK BMS LiFePO4 Li-ion Battery Protection Board --- ## 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.com.ar/products/631392471-smart-bms-8s-24s-24v-72v-150a-2a-active-balance](https://www.desertcart.com.ar/products/631392471-smart-bms-8s-24s-24v-72v-150a-2a-active-balance) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-23*