JK ESS 8S-16S 300Amp (2A Active Balance)

The JK ESS 8S-16S 300Amp is a high-current smart BMS made for 8S to 16S battery banks, and it is optimised for 48V LiFePO4 systems. It delivers 300A of continuous discharge, offers 2A active balancing, and includes Bluetooth, CAN and RS485 communication. Yati Infotech Solution Pvt. Ltd. supplies it from Noida to pack builders, solar installers and service workshops across India.

Product Overview

A large home or business battery bank works hard. It supports heavy appliances, rides through power cuts and talks to an inverter many times a second. At that scale, the BMS is no longer just a protection board. It becomes the link between the cells and the rest of the energy system.

The JK ESS inverter edition is built for that role. It supports eight to sixteen cells in series, so it covers everything from small banks to full 48V systems. It handles 300A of continuous discharge, which makes it suitable for heavy loads. Its communication interfaces let the board share battery data with a compatible inverter, so the inverter can adjust charging based on what the battery reports.

You will see this product searched under many names, including JK ESS, JK Smart ESS, JK BMS ESS, JK ESS 8S 16S 300Amp and 8S 16S JK ESS. They all point to the same family of boards.

Key Features

• 8S to 16S range with optimisation for 48V LiFePO4 systems
• 300A continuous discharge for heavy loads
• 2A active balancing between cell groups
• CAN and RS485 communication for inverter integration
• Bluetooth with the JK app for monitoring and settings
• Heating function for cold-weather setups
• Inverter-ready design with preloaded communication protocols

Specifications

What Does 8S to 16S Mean?

The "S" stands for series. A pack with eight cells in series is 8S, and a pack with sixteen is 16S. This board supports any count from 8 to 16.

Here are some common examples, using typical nominal cell voltages:

• 8S LiFePO4: about 25.6V
• 15S LiFePO4: about 48V
• 16S LiFePO4: about 51.2V, the usual choice for a 48V storage bank
• 13S Li-ion: about 48V

Set the chemistry and series count to match your cell stack, and confirm the limits against the datasheet before you build.

What Does 2A Active Balancing Do?

In a large bank, cell drift is a real problem. Over time, some cells charge faster and some hold less, and the voltage gap between them widens. The weakest cell then limits the whole bank.

A passive balancer works mainly near the end of a charge and burns off extra energy as heat. An active balancer moves energy from stronger cells to weaker ones instead. The "2A" figure is the balancing current, which is how much energy the board can move between cells. A higher balancing current gives the board more power to correct drift, which helps in big banks.

Active balancing does not replace good cell matching, solid busbars and proper cooling, so plan those as well.

Inverter Communication

The board has CAN and RS485 interfaces, and it comes with communication protocols preloaded for inverter use. When the BMS and inverter communicate, the inverter can receive battery information such as state of charge and cell voltage, and it can adjust its charging to suit.

Interfaces alone do not guarantee compatibility. Your inverter must support a matching protocol, and the settings, pinout and cable must match. Before you plan an installation, check your inverter's documentation, and ask Yati if you are unsure.

Bluetooth App Monitoring

Bluetooth connects the board to the JK app on your phone. Through the app, you can view cell voltages, adjust protection limits and check the battery's status without opening the cabinet. For installers, this speeds up commissioning and fault-finding.

What 300A Means in Practice

Current alone does not tell you the power, so use a simple formula: voltage multiplied by current. A 48V pack at 300A delivers about 14.4kW, and a 51.2V pack at 300A delivers about 15.4kW. That is enough for heavy household or workshop loads.

At this level, the whole current path matters, not just the BMS:

• Conductors and busbars: Size them for the full current, with margin.
• Fuse or breaker: Add proper protection in the main current path.
• Terminals: Tighten them firmly, because loose joints create heat.
• Cooling: Give the board airflow, especially during long periods of heavy charging, when the balancer and power parts can warm up.
• Capacity setting: Set a realistic pack capacity in the BMS, so state of charge reads accurately.

Where You Can Use It

The JK ESS 8S 16S 300Amp suits larger stationary storage uses:

• Residential solar storage batteries
• 48V home powerwall and ESS cabinets
• Inverter and backup batteries with heavy loads
• Off-grid and hybrid solar systems
• Workshop and farm energy storage
• Battery assembly and service workshops

Installation Tips

• Read the manual and wiring diagram for your exact hardware revision before you start.
• Set the chemistry and the series count to match your cell stack.
• With chargers and loads disconnected, check each cell group's voltage and connect the sampling harness in the correct order.
• Use insulated tools, and route communication wiring away from high-current cables.
• Start with a low current, and check terminal temperature as you raise the load.
• Confirm inverter communication before you put the pack into full service.

Why Buy from Yati

Yati Infotech Solution Pvt. Ltd. is a manufacturer based in Noida, so you buy from a direct supplier. Bulk orders are welcome, which suits OEMs and pack builders. The same team supplies lithium cells, nickel strip, battery casings and other pack materials, so you can plan one order for the whole build.

Frequently Asked Questions

What is the JK ESS 8S-16S 300Amp BMS?

It is a smart inverter BMS for 8S to 16S battery banks, rated for 300A continuous discharge and optimised for 48V LiFePO4 systems. The JK ESS board adds 2A active balancing, Bluetooth monitoring and CAN and RS485 communication.

What is the JK ESS BMS price in India?

The JK ESS BMS price in India is listed per piece on the product page, and rates improve with quantity. For a bulk quote on the JK Smart ESS board, send Yati your quantity.

What does 2A mean in JK ESS 8S-16S-300Amp (2A)?

It refers to the 2A active balancing current, which is how much energy the BMS can move between cell groups to control voltage spread. The 300A figure is the continuous discharge current, which is a separate rating.

How much power can a 300A BMS handle?

A 48V pack at 300A delivers about 14.4kW, and a 51.2V pack at 300A delivers about 15.4kW. Your real limit also depends on your cables, busbars, fuse and cooling, so plan the full current path.

Can the JK ESS BMS work with my inverter?

It offers CAN and RS485 with protocols preloaded for inverter use. Whether it works with your inverter depends on the protocol, settings, pinout and cable, so check your inverter's documentation, or ask Yati before you buy.

Which batteries does the JK ESS 8S 16S support?

It supports Li-ion, LiFePO4 and LTO packs from 8S to 16S, and it is optimised for 48V LiFePO4 banks. Set the chemistry and cell count to match your pack, and check the limits against the datasheet.

Where can I buy the 8S 16S 300Amp JK ESS in India?

You can order from Yati Infotech Solution Pvt. Ltd. in Noida through the Yati Store, or message the team on WhatsApp. Bulk orders and shipping across India are available.

Get a Quote from Yati

Building solar or inverter storage batteries, or need heavy-duty BMS boards in bulk? Add the JK ESS 8S-16S 300Amp to your quote on the Yati Store, or send us your chemistry, series count and inverter details.