---
product_id: 649385752
title: "Smart BMS with Heat CAN RS485 4S-8S 12V-24V 200A 1A Active Balance with Bluetooth Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B1A8S20P-HC)"
brand: "jkbms"
price: "฿11093"
currency: THB
in_stock: true
reviews_count: 8
category: "Jkbms"
url: https://www.desertcart.co.th/products/649385752-smart-bms-with-heat-can-rs485-4s-8s-12v-24v
store_origin: TH
region: Thailand
---

# Bluetooth app control 200A max current Active heating & temp protection Smart BMS with Heat CAN RS485 4S-8S 12V-24V 200A 1A Active Balance with Bluetooth Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B1A8S20P-HC)

**Brand:** jkbms
**Price:** ฿11093
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up smart, stay balanced, and never miss a charge!

## Quick Answers

- **What is this?** Smart BMS with Heat CAN RS485 4S-8S 12V-24V 200A 1A Active Balance with Bluetooth Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B1A8S20P-HC) by jkbms
- **How much does it cost?** ฿11093 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/649385752-smart-bms-with-heat-can-rs485-4s-8s-12v-24v)

## 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

- • **Cold-Weather Ready:** Integrated heating function activates automatically or manually to protect batteries in freezing conditions, ensuring reliable power year-round.
- • **Smart Balance Booster:** Active equalization technology recovers up to 20% more capacity, extending battery life and maximizing performance.
- • **Versatile Compatibility:** Supports LiFePO4, Li-ion, and LTO batteries from 4S to 8S (12V-24V), perfect for RVs, solar setups, UPS, and more.
- • **Ultimate Battery Guardian:** Comprehensive protection against overcharge, overdischarge, overcurrent, short circuits, and extreme temps keeps your pack safe and sound.
- • **Seamless Bluetooth Control:** Effortlessly monitor and adjust your battery status anytime via JK BMS app on Android & iOS—control at your fingertips.

## Overview

The JKBMS Smart BMS JK-B1A8S20P-HC is a compact, high-performance battery management system designed for 4S-8S LiFePO4, Li-ion, and LTO packs (12V-24V). It delivers robust 200A current handling with active cell balancing, Bluetooth app connectivity for real-time monitoring and control, and advanced safety features including overcharge, overdischarge, overcurrent, short circuit, and temperature protections. Its unique heating function ensures optimal battery performance in cold climates, making it ideal for RVs, solar power systems, and UPS applications. Backed by a 1-year warranty and user-friendly setup, it’s a top-tier choice for professionals seeking reliable, smart battery management.

## Description

desertcart.com: JKBMS Smart BMS with Heat CAN RS485 4S-8S 12V-24V 200A 1A Active Balance with Bluetooth Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B1A8S20P-HC) : Electronics

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: Works great, no problems and smaller size. - This BMS has been preforming great for months now. Not one problem and it keeps the cells balanced. I like the small size and it still preforms as well as the larger BMS with the extra boards. Much easier to place in a battery build and has a screen to see what it’s doing, plus the app to view or change it all. I wondered about the smaller cables, and I wish they were a little longer. But it’s fine because I would always need to add more length anyway. And these never heat up. Great to also have 2 temp probes also. I liked this BMS so much I just bought another one for the next battery build. Great BMS!!

## 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-HC) * 1,Wires (70cm) * 1,Switch (50cm) * 1,NTC (40cm) * 1,CAN cable (25cm) * 1,Heating cable (16cm) * 1,Screws * 4,Operate manual * 1,(RS485 converter not included).Everything you need for setup and operation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DBKNB2VN |
| Best Sellers Rank | #48,159 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #168 in Power Converters |
| Brand | JKBMS |
| Color | JK BMS |
| Customer Reviews | 4.3 out of 5 stars 176 Reviews |
| Input Voltage | 24 Volts |
| Item Dimensions | 6.02 x 4.96 x 0.69 inches |
| Item Weight | 12.32 ounces |
| Item dimensions L x W x H | 6.02 x 4.96 x 0.69 inches |
| Manufacturer | JKBMS |
| Model Number | JK-B1A8S20P-HC |
| Output Voltage | 24 Volts |
| Plug Type | Micro USB |
| Warranty Description | 1 year manufacturer |

## Product Details

- **Brand:** JKBMS
- **Color:** JK BMS
- **Item Weight:** 0.77 Pounds
- **Input Voltage:** 24 Volts
- **Item dimensions L x W x H:** 6.02 x 4.96 x 0.69 inches

## Images

![Smart BMS with Heat CAN RS485 4S-8S 12V-24V 200A 1A Active Balance with Bluetooth Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B1A8S20P-HC) - Image 1](https://m.media-amazon.com/images/I/71TyxHlV3OL.jpg)

## Available Options

This product comes in different **Style** 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.

### ⭐⭐⭐⭐⭐ Works great, no problems and smaller size.
*by N***R on November 30, 2025*

This BMS has been preforming great for months now. Not one problem and it keeps the cells balanced. I like the small size and it still preforms as well as the larger BMS with the extra boards. Much easier to place in a battery build and has a screen to see what it’s doing, plus the app to view or change it all. I wondered about the smaller cables, and I wish they were a little longer. But it’s fine because I would always need to add more length anyway. And these never heat up. Great to also have 2 temp probes also. I liked this BMS so much I just bought another one for the next battery build. Great BMS!!

### ⭐⭐⭐⭐⭐ Great product
*by T***R on December 23, 2025*

Fantastic product. Took me a while to build a battery and set up the BMS but worked like a charm and with the help of some great YouTube videos was able to complete the setting properly.

## Frequently Bought Together

- JKBMS Smart BMS with Heat CAN RS485 4S-8S 12V-24V 200A 1A Active Balance with Bluetooth Battery Protection Board for LiFePO4 Li-ion LTO Battery Pack (JK-B1A8S20P-HC)
- JKBMS Accessory 2 inch LCD Display Screen with Active Switch Monitor for JK Smart BMS Battery Protection Board

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-03*