EMSYS Design

What EMSYS Design does

EMSYS Design is a privately held, vertically integrated provider of IoT-based battery monitoring and testing solutions, founded in 2008 and headquartered in Guaynabo, Puerto Rico, with a U.S. sales presence on the 858 area code (San Diego). The company's portfolio centers on the CellSPY product family of wireless battery monitors that measure DC voltage, AC ripple voltage, impedance, and temperature across VRLA, AGM, Gel, and VLA battery chemistries, paired with the WCTA-400 Wireless Current Transducer (Hall-Effect dual-core) and the SRV-1200 Mini Gateway that bridges wireless sensor data to industrial systems via ModbusTCP, ModbusRTU, and SNMP. Variants include the All-In-One CellSPY with Electrolyte Level Monitor (NERC-compliant for VLA batteries), Cableless CellSPY for retrofit installations, and CellSPY Lite for IEEE capacity testing. For field testing, EMSYS sells the Battery Tester Box with modular tips and an accompanying customer management portal and mobile application with preset PM templates.

The company makes money primarily through direct enterprise hardware sales of its sensors and gateways, supplemented by recurring software platform access (web portal and mobile app) used for reporting, alarming, and compliance. Go-to-market is a B2B direct enterprise field-sales model targeting data centers, telecommunications operators, utilities, and energy companies, supported by a channel relationship with battery manufacturer Enersys Inc. Marketing is concentrated on the corporate website, a technical blog covering VRLA aging, AC ripple, and battery maintenance topics, and LinkedIn. Pricing is not publicly disclosed; contracts are multi-year and quote-based. The company reports 400,000+ monitors deployed globally, 3+ billion data points collected annually, hundreds of enterprise customers (including Verizon, Vantage, Switch, LADWP, Meta, National Grid, Sprint, Shell, and Pixar), and 25+ new features released annually.

EMSYS' strategic posture is that of a focused niche incumbent: it designs and manufactures its own hardware to achieve tight vertical integration rather than white-labeling, differentiates on accuracy metrics (e.g., 0.5% voltage accuracy, sub-1°C temperature resolution, 3% impedance accuracy), and addresses the modernizing-battery-maintenance pain point in regulated and uptime-critical environments. The firm shows no disclosed funding history, no parent company, no subsidiaries, and no M&A activity, consistent with a bootstrapped, founder-led operating posture.

Name

EMSYS Design

Legal name

Emsys Design

Website

https://emsys.com

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

11–50 employees

Short description

EMSYS Design is a privately held Puerto Rico-based IoT company that designs and sells the CellSPY wireless battery monitoring system — sensors, gateways, and a cloud/mobile software platform — to enterprise customers in data centers, telecommunications, utilities, and energy sectors.

Ownership category

akta.pro rank

Product category

Battery Monitoring Systems

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Measuring & Controlling Devices, Nec (3829)

akta.pro primary industry

Battery Analytics, Digital Twins, SoH/SoC Estimation & Degradation-Aware Dispatch (EUAFAKAK)

akta.pro secondary industries

Formation, Testing & Quality/Metrology Equipment for Batteries (EUAFABAK), Condition Monitoring Sensors & IoT (online/offline monitoring, edge devices) (EUADAJAD), Power Quality, Metering & Monitoring (HDACAJAG)

Keywords

• IoT battery monitoring
• Wireless battery sensors
• Battery health monitoring
• Thermal runaway detection
• UPS battery testing

Headquarters

HQ city

Guaynabo

HQ country

Puerto Rico

HQ region

Latin America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Supply Chain, Marketing or Sales, Operations

Revenue model

1. Battery Monitoring Hardware: Sale of CellSPY battery monitoring hardware including wireless sensors (CSPY-400 series), wireless current transducers (WCTA-400), and gateways (SRV-1200 Mini Gateway). Hardware is sold as part of integrated IoT monitoring solutions.
2. Battery Testing Equipment: Sale of battery testing equipment including Battery Tester Box designed for IEEE maintenance testing. Products include modular tips, extension pieces, and handles. Includes 3-year standard warranty with 5-7 year warranty options available.
3. Software Platform and Monitoring Services: CellSPY Battery Monitoring software platform with real-time visibility, better reporting, and automated report generation. Includes web-based portal for customer management, locate reports and data by Customer, Site, Equipment. Mobile application supports Battery, Electrolyte level, Temperature, Specific Gravity, and Visual Checks with preset templates.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

EMSYS Design designs, manufactures, and sells IoT-based battery monitoring and testing hardware along with supporting software for enterprise customers. The CellSPY product line includes wireless battery sensors, the WCTA-400 wireless current transducer, and the SRV-1200 Mini Gateway, complemented by the handheld Battery Tester, a web-based Customer Management Portal, and a mobile app for field preventive maintenance. Solutions are deployed at data centers, telecommunications carriers, utilities, energy operators, and large internet/media firms to monitor backup battery health, detect thermal runaway, and streamline IEEE capacity and maintenance testing.

Product overview

EMSYS Design offers an integrated IoT-based battery monitoring and testing ecosystem. The CellSPY product line forms the core monitoring platform, with variants including standard CellSPY for all battery types, Cableless CellSPY for retrofit installations, All-In-One CellSPY with Electrolyte Level Monitor (NERC compliant for VLA batteries), and CellSPY Lite for capacity testing. The hardware portfolio also includes the WCTA-400 Wireless Current Transducer for ambient sensing and thermal runaway detection, and the SRV-1200 Mini Gateway providing wireless-to-IP bridging with ModbusTCP/ModbusRTU/SNMP support. For testing, EMSYS provides the Battery Tester Box (handheld, modular, no recalibration required) paired with a Customer Management Portal for organizing reports and a Mobile Application for field PMs. The company serves data centers, telecoms, utilities, and energy sectors with end-to-end solutions covering sensors, gateways, cloud software, and mobile apps.

Differentiator

Problem solved

Functional benefit

Brands

• CellSPY: Battery monitoring system that measures Voltage, Temperature, Resistance, and AC Ripple Voltage. Includes variants: standard CellSPY, CellSPY with Electrolyte Level Monitor, Cableless CellSPY, and CellSPY Lite for capacity testing.
• CellSPY Lite
• Battery Tester
• Mini Gateway (SRV-1200)

Products and services

• CellSPY for All Battery Types Wireless battery monitor that measures DC voltage across battery terminals, AC ripple voltage, battery ohmic value (impedance/ resistance), and temperature at the negative battery post; supports VRLA, AGM, gel, and other stationary battery chemistries.
• All-In-One CellSPY with Electrolyte Level Monitor Combines all CellSPY monitoring features with electrolyte level monitoring for Vented Lead-Acid (VLA) batteries; NERC compliant and requires no field calibration.
• Cableless CellSPY CellSPY battery monitor with no cables, designed for retrofit installations on battery strings that do not have tab washers.
• CellSPY Wireless Battery Monitor (CSPY-400 Series) Wireless battery monitor available in four sensor types for nominal voltages 1.2V, 2V, 12V, and 16V, with DC voltage measurement (0.6V-20V, 1mV resolution, 0.5% accuracy), temperature (0°C-80°C, 0.01°C resolution, ±1°C accuracy), impedance (0-65mΩ, 1µΩ resolution, accuracy better than 3%), and AC ripple voltage (0-200mV RMS, 1mV resolution, 1% accuracy, max 400Hz).
• Wireless CT with Ambient Sensor (WCTA-400) Wireless Current Transducer using Dual-Core Technology to measure DC current (1A or 800A) with Hall Effect based circuitry, also providing ambient temperature sensing for early detection of faulty air conditioning, improper ventilation, and thermal runaway conditions when paired with CellSPY monitors.
• Mini Gateway (SRV-1200) Wireless-to-IP and IP-to-Wireless bridge gateway designed for smaller and remote battery sites, acting as an application server that enables direct access to collected data through industry-standard ModbusTCP, ModbusRTU, and SNMP protocols; built on Quad-core Arm Cortex-A53 @ 1.5GHz with 4GB LPDDR4 RAM, 16GB eMMC Flash, and multiple I/O ports.
• CellSPY Lite Simplified battery monitor designed for IEEE battery capacity testing, providing essential monitoring capabilities at a lower entry point than the full CellSPY offering.
• Battery Tester (Box) Handheld, fully modular battery tester designed for IEEE maintenance testing, compatible with all battery chemistries, with adjustable length via extension pieces, replacement tips, no recalibration requirement, and a 3-year standard warranty extendable to 5-7 years.
• Customer Management Portal Web-based platform for service managers to locate reports and data by customer, site, and equipment, support report generation and regeneration from test data with customizable parameters, and streamline compliance reporting.
• Mobile Application Companion mobile app that supports battery, electrolyte level, temperature, specific gravity, and visual checks for field maintenance operations, featuring preset templates for customizable preventive maintenance reports and an intuitive interface designed for quick team adoption.

Quantifiable outcome

• 400,000+ Battery Monitors deployed globally
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability2 records

Feature5 records

Partnerships

One partnership is on record.

• Enersys InccoreChannel Partner/ Reseller/ DistributorEnersys, a major battery manufacturer, uses EMSYS testing tools and has provided a customer testimonial. West Area Operations Manager Stefan Zidaru stated: 'EMSYS provides a great product, with a technology that fits our times. Their customer support is outstanding- they answered our questions fast and provided new solutions to our needs.'

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Eaton: Eaton offers UPS systems with integrated battery monitoring and its own predictive analytics. Its breadth in electrical infrastructure makes it a frequent incumbent competitor to point-solution battery monitoring vendors like EMSYS.
• ABB: ABB's power infrastructure portfolio includes battery health monitoring for substations and data centers, often bundled with its broader electrical equipment offerings. Comparable to EMSYS in utility and industrial battery monitoring deployments.
• Megger: Megger, through its Alber acquisition, is a leader in battery testing instruments (e.g., TORKEL for capacity testing) and continuous monitoring — closely comparable to EMSYS's Battery Tester IEEE testing and CellSPY continuous monitoring products.
• Vertiv: Vertiv (formerly Emerson Network Power) is a major UPS and critical infrastructure OEM that bundles battery monitoring/health management with its UPS and DCIM portfolios, competing with EMSYS in data centers and telecoms for battery-room visibility and predictive maintenance.
• Schneider Electric: Schneider's EcoStruxure platform includes battery monitoring and energy management across data centers and utilities. As a broad incumbent with deep enterprise procurement relationships, Schneider competes with EMSYS for monitoring-of-record status in large customer accounts.

Direct peers

• BatteryDAQ: BatteryDAQ offers wireless and wired battery monitoring systems for UPS applications in data centers and telecoms, overlapping with CellSPY's wireless sensor, gateway, and cloud architecture for the same mission-critical backup battery use cases.
• Alber (by Megger): Alber battery monitoring products (now part of Megger) provide continuous cell-level voltage, impedance, and temperature monitoring — directly comparable to CellSPY — and are widely deployed in utilities, telecoms, and data centers.
• SOCOMEC: SOCOMEC provides power monitoring, UPS, and battery monitoring solutions focused on critical power applications, overlapping with EMSYS in industrial battery health monitoring and preventive maintenance.
• SBS (Storage Battery Systems): SBS provides battery monitoring solutions and IEEE capacity testing services for stationary batteries, directly overlapping with EMSYS's CellSPY monitoring and Battery Tester offerings for utility, telecom, and data center customers.
• Canara: Canara is a specialist in remote battery monitoring and float management for telecom and utility backup power systems, making it a closely comparable niche player to EMSYS in wireless battery monitoring.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/emsys-design-inc

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about EMSYS Design