JK ESS 8S-16S 100Amp (2A Active Balance) Smart BMS

The JK ESS 8S-16S 100Amp is a smart energy-storage BMS made for home battery banks and powerwalls. It carries 100A of continuous current with a 200A peak rating, balances cells with a strong 2A active balancer and connects through Bluetooth and RS485. Yati Infotech Solution Pvt. Ltd. supplies it from Noida to pack builders, solar installers and service workshops across India.

Product Overview

A home battery bank cycles every day. It charges from solar in the morning, feeds the house in the evening and sits through long nights in between. Over thousands of cycles, small differences between cells grow, and the weakest cell begins to set the limit for the whole bank. The JK-PB2A16S10P is made to fight that problem.

It supports eight to sixteen cells in series and is optimised for 48V and 51.2V LiFePO4 storage systems. Its 2A active balancer moves energy between cells to keep the voltage spread small, which matters most in high-capacity cells. It is rated for 100A continuous current, and the model label also lists a 200A peak for short bursts.

You will see this product searched under many names, including JK ESS, JK Smart ESS BMS, JKESS, JK ESS 8S 16S 100 Amp and 8S 16S JK ESS. They all point to the same family of boards.

Key Features

• 8S to 16S range with optimisation for 48V and 51.2V LiFePO4 banks
• 100A continuous charge and discharge current
• 200A peak current for short surges
• 2A active balancing between cell groups
• Bluetooth app monitoring and RS485 communication
• Li-ion, LiFePO4 and LTO support
• Optional display add-ons for on-board status
• Protection against overcharge, over-discharge, overcurrent and extreme temperature

Specifications

What Does 2A Active Balancing Do?

Cells never stay perfectly equal. Over time, some charge faster and some hold less, and the gap between them widens. A passive balancer works mainly near the end of a charge and burns off the extra energy as heat. An active balancer moves charge 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, and it helps most in large cells such as 100Ah, 200Ah and 280Ah. Balancing does not replace good cell matching and solid busbars, so plan those as well.

What Do 100A Continuous and 200A Peak Mean?

The 100A rating is the current the board can carry continuously. The 200A peak figure is the short-burst limit, for moments when a large load starts. The datasheet should tell you how long the peak can last, so check it before you design around it.

To see what the continuous rating means for power, multiply voltage by current:

• A 24V pack at 100A delivers about 2.4kW.
• A 48V pack at 100A delivers about 4.8kW.
• A 51.2V pack at 100A delivers about 5.1kW.

If your inverter or loads need more than that for long periods, choose a higher-current board.

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. Common examples, using typical nominal cell voltages, are:

• 8S LiFePO4: about 25.6V
• 15S LiFePO4: about 48V
• 16S LiFePO4: about 51.2V, the usual 48V-class 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.

Inverter Communication, App and Display

RS485 lets the BMS share battery information with a compatible inverter, and the page also describes CAN support, so confirm the exact interfaces on your unit. Whether the board works with your inverter depends on the protocol, settings, pinout and cable. Check your inverter's documentation before you buy, and ask Yati if you are unsure.

The Bluetooth app shows cell voltages, cycles and temperatures in real time, and it lets you adjust protection thresholds for your chemistry. Optional display add-ons can show status on the board without opening the app. Ask Yati which options are included in your package.

Where You Can Use It

• Residential solar storage batteries
• 48V home powerwalls and server-rack batteries
• Inverter and backup batteries
• Off-grid and hybrid solar systems
• Battery assembly and service workshops

Planning Your Build

At 100A, the whole current path matters, not just the BMS. Check these points before you start:

• 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.
• Cell matching: Use cells from one model and batch, and match their voltage before you connect them.
• Cooling: Give the board airflow, especially during long periods of heavy use.
• Capacity setting: Set a realistic pack capacity in the BMS, so state of charge reads accurately.

Commissioning Tips

• Read the manual for your exact hardware revision before you start.
• 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.
• Record your settings, including chemistry, series count, balance settings and inverter protocol.

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 100Amp BMS?

It is a smart energy-storage BMS for 8S to 16S lithium packs, model JK-PB2A16S10P, rated for 100A continuous current. The JK ESS board adds 2A active balancing, Bluetooth monitoring 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 BMS, send Yati your quantity.

What does 2A mean in JK ESS 8S-16S-100AMP (2A)?

It refers to the 2A active balancing current, which is how much energy the BMS can move between cell groups. The 100A figure is the continuous current rating, which is a separate matter.

How much power can a 100A JK ESS BMS handle?

A 48V pack at 100A delivers about 4.8kW, and a 51.2V pack at 100A delivers about 5.1kW. The model label also lists a 200A peak for short bursts. Your real limit also depends on your cables, busbars, fuse and cooling.

Can the JK ESS BMS work with my inverter?

It offers RS485, and the page also describes CAN. 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 and 51.2V 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 100AMP 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 a home battery bank, or need ESS BMS boards in bulk? Add the JK ESS 8S-16S 100Amp to your quote on the Yati Store, or send us your chemistry, series count and inverter details.