India’s Default Battery Management System

If you are operating mission-critical systems and relying on the backup of a battery bank, you must get Sosaley’s Battery Management System (BMS). Our battery design, its performance, climate controls, safety systems, and cost cutting technology is all about peace of mind – knowing your batteries are constantly monitored to protect your enterprise from power failure.

Sosaley’s battery software takes a modular approach to battery monitoring. The system can be tailored to meet your specific requirements. From VRLA to wet cells, lead-acid to Lithium Ion, the Sosaley BMS can monitor them all and give accurate information 24/7.

Multiple Models

The Sosaley Battery Management System comes in multiple models. For UPS and Inverters, our invBMS can read data from 1000s of batteries and give you location and specific details. Our battery monitor helps you to drive back home safely and charge the battery in time. Our product covers cars, trucks, forklifts and e-rickshaws. The vehicular battery systems has GPS and J1939 interface and acts as an inexpensive telematics unit.

Secure Cloud Framework

Sosaley Technologies provides a secure and inexpensive Cloud framework for data collection and communication. Your data is secure with end-to-end encryption. Our continuous data sampling, battery monitoring system, and reporting capabilities make all the necessary battery information available at your fingertips.

Sosaley’s cloud can send alerts via SMS, e-mail and missed calls directly to you and service technicians for immediate corrective measures. Manufacturers and distributors can also monitor the battery performance to deliver proactive preventative maintenance. Used with the cloud, your monitoring cost will be surprisingly low. Whether stationary or mobile, Sosaley has a solution for you.

Large Installed Base

By end of this year, the Sosaley Battery Management System will be monitoring over 50,000 batteries in Godrej, DLF, Hatsun Diaries, and other client installations.

Need we say more? Choose your BMS model, now!


BMS was tested thoroughly by the Central Electronics Centre of IIT/M. One series of tests was on the physical capabilities of BMS. The other was on the current handling capabilities of BMS.



The Inverter/UPS BMS (invBMS) is moving like hot potatoes! 1000s of invBMS are being installed every month. Clients such as HAP, Hyundai, and Isha are reaping benefits every day!

Get a quote for your invBMS today!!
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All The Details You Need

Click on the logo or “Read More” to get more details on the model. For truckBMS, please click here.

Sosaley invBMS Logo The default standard for Inverter and UPS battery monitoring with powerful cloud features. Replace individual rotten batteries easily. Read More.
Sosaley fLiftBMS Logo Ensures zero downtime of forklifts, golf carts, and other battery powered vehicles. Tested and chosen by Godrej and others as default OEM option. Read More.
Sosaley eRickBMS Logo Standard option for e-rickshaws. Integrated to J1939 and GPS for seamless control and monitoring of e-rickshaws. Read More.
Sosaley carBMS Logo Installs in 30 seconds. With cloud and GPS, this tiny and wonderful device saves you from losing your vehicle or being stuck. Read More.
Sosaley autoBMS Logo Standard option for e-vehicles. Integrated to J1939 and GPS for seamless management of vehicle readiness. Read More.
Sosaley truckBMS Logo Critical for fleets owners including railways. Get battery and vehicle status for continuous monitoring through cloud dashboard. More.
  • 80% of all UPS failures are due to undetected battery problems.
  • An UPS or an inverter cannot detect individual battery failure.
  • One faulty battery can kill your entire battery bank.
  • Our BMS Monitor individual batteries on key parameters including voltage, temperature, current, State of Charge (SOC), State of Health (SOH), and battery status.
  • Optional wireless connectivity.
  • Manage batteries from 12-80V and 0-500A.
  • Watch 1000s of batteries across 100s of locations.
  • 24/7 alerts via SMS, emails and missed calls.
  • User defined alarm limits.
  • Get prompted for instant action.
  • View battery status from anywhere through cloud.
  • Eliminate downtime and failures.
  • Built-in intelligence for battery state recognition.
  • Verified data on all battery parameters.
  • Detailed analysis on battery performance.
  • Daily, weekly, monthly, and annual reports can be generated to track battery performance and efficiency.
  • Monitor batteries at less that Rs.50 per battery month.
  • Identify faulty batteries instantly.
  • 24/7 alerts via SMS, emails, and missed calls.
  • Optimise battery configuration for all your backup and UPS systems.
  • Get 100% uptime, all the time. Eliminate downtime and failures.
  • Reduced manpower, shut down and other costs.
  • Planned battery purchasing
  • Simple plug and play.
  • Wireless communication.
  • Tangible benefits.
  • Over 2 years in development with hard research, user and industry feedback.
  • Unique battery ID and location.
  • Centralized dashboard through secure cloud.
  • Extensive battery data, analysis and reporting.
  • Advanced customer support.

Sosaley BMS Architecture system diagram

The BMS architecture consists of a Master Controller and multiple slave modules. The slave modules sit on the battery and have high-quality sensors to read data.

Each Master Controller can handle up to 36 individual batteries. The Master Controller receives data from the slaves, processes the incoming data, and sends the data to the cloud. You can connect hundreds of Master Controllers to monitor all your batteries.

Our proprietary architecture includes multiple redundancies to ensure safety and reliability at all times. The sensors, modules, and master controller are designed to be isolated from surges and power spikes. The sensors get their power from the batteries. The master controller get it’s own power from the UPS or Inverter and is thus never down.  The master controller is also capable of both wired and wireless communication protocols, as per your specific needs.

Sosaley BMS Snap

Sosaley BMS Cloud IntegrationSosaley provides a secure and cost-effective Cloud framework for data collection and communication between the Battery management modules and the user. Your data is secured and stored in a biometrically sealed facility with redundancies built into the system for safeguarding against data loss.

Our continuous data sampling, reporting and battery management capability delivers all the necessary information at your fingertips, as well as to UPS/battery manufacturers/dealers for preventative maintenance. The cloud can also send SMS/email alerts directly to the service technicians to inform them about the status of the batteries.

Parameter Range Description
Voltage 2-120V Voltage identifies catastrophic failures such as short-circuited cells and gives true visibility of battery performance.
Battery Temperature 20-120° Temperature is a critical parameter as battery temperature measurements allow early detection of thermal runaway.
Current 0-500A An imbalance highlights potential problems within a battery string. Current measurement allows early detection of issues and any significant leakage faults.
State of Charge (SOC) 10-100% State of Charge (SOC), is used to describe how full a battery is. Remember, lead-acid battery always needs to be fully charged for storage.
State of Health (SOH) 0-100% SOH is a measure of the long-term capability of the battery and gives an indication of how much lifetime of the battery has been consumed and how much is left.
Battery Status C, D, or, S Battery status tells you if the battery is charging, discharging, or, in standby mode.
Charging / Discharging cycles This is calculated to get a rough measure of the life of the battery. For example, if a manufacturer specs says the battery can be charged a 100 times, you will know how many charge cycles are left.
Time remaining Again calculated, this tells you how much time is left in the battery at current load conditions.
Hydrogen Emmission monitoring Using a flex sensor, we can measure the bulge of the battery, if any, and warn you of possible battery explosions. This is particularly critical in installations where ventilation is low.

Individual Battery Voltage

Incorrect charge voltages may result in loss of capacity, accelerated grid corrosion, excessive gassing and premature end of life. Voltage also identifies catastrophic failures, such as short circuit cells, and gives true visibility of performance under discharge.

Ambient Temperature

A battery’s life-span is normally specified at 20 or 25 degrees centigrade. Temperatures outside of the specified range can significantly affect the battery’s corrosion rate, and therefore the life of the battery. An 8-10 degree temperature increase can decrease battery life by 50%.

String Current

String current monitoring measures the energy delivered or accepted by each battery string. An UPS will only measure total current and cannot detect imbalances between strings. An imbalance highlights potential problems within a battery string. String current measurement also allows detection of incorrect battery charging and any significant earth leakage faults. Tracking the string voltage confirms the charger is on and performing correctly.

Individual Battery Impedance (Ohmic value)

The impedance of a battery will increase with age. High impedance results in a battery that cannot supply the required current – its key task. High impedance also highlights poor connections and open circuit batteries before failure. Batteries can fail in a very short period of time (less that a week) so measuring impedance daily allows you to detect faulty batteries without the need to discharge them. By trending impedance you can accurately determine end-of-life of the battery.

Battery Temperature

Measuring the temperature of each battery highlights localized environmental problems through poor HVAC. It can also highlight poor connections and excessive charger ripple. Temperature is a critical parameter for NiCad batteries. Most importantly, battery temperature measurements allow the early detection of thermal runaway.

32 bit Micro-Controller

Our micro-controller is powerful enough to handle multiple operations such as wireless communication, remote operations, data mining operations and any new features via future software upgrades.

Experience and Industry Feedback

Our product development has been guided by a 40 year industry veteran to ensure that we exceed the industry standards in all aspects of the development process.

Our BMS specifications are tailor made to fit the industry requirements.

Proprietary Cloud Framework

Our solution includes integration with the cloud for remote access from anywhere across the globe. We rely on our own custom developed back-end servers and framework instead of third-party vendors thereby increasing the security of your data.

Wireless Communication Options

Our controller can communicate via a variety of protocols such as serial port, WiFi, Ethernet, GSM etc.

Ease of Installation

The individual battery modules are as simple as a plug and play device. Easy to install and easy  to replace. Detailed instruction manual available.

Remote Control of Your Batteries

Sosaley’s BMS is the only solution with the feature to cut-off your batteries in case of emergency/vacation feature.  This feature also provides protection against spikes and short-circuits.

Integration with Manufacturers & Distributors

Our cloud/master-controller can directly provide feedback to UPS manufacturers and distributors, enabling them to perform remote services and preventative maintenance.

Unique ID

We can tag each customer with a unique ID so manufacturer or distributor can analyze and use the performance data to optimize their service and future offerings.

Advanced Customer Support

We provide a comprehensive support service along with our BMS solution and offer free replacements for up to 1 year.

Battery Safety

The Sosaley BMS referred to here is to be used only with batteries that comply with IEC 60896 stationary lead acid batteries and/or with secondary cells and batteries containing alkaline or other non-acid electrolytes and meet IEC 62133 standards. For batteries and cells such as Li-Ion, please revert back to us.

Electrical and Electronic Safety

Sosaley BMS adheres to IEC 61508 safety standards that specifies the functional safety of electrical, electronic, and programmable electronic equipment.

The BMS Story In Pictures

(Click on the first image to see the BMS Story in Pictures)