Real-time battery health streaming
Continuous SOC, SOH, cell voltage, and temperature telemetry from every machine in the field, not just when a fault occurs.
Battery BMS Telemetry for Electric Machines
Electric machine OEMs ship battery systems without continuous field visibility. The BMS tracks cell voltage, thermal events, fault codes, and charge-cycle history, but that data remains on the machine after it leaves the factory. Melqart Systems deploys a CAN-to-cloud edge gateway on each machine, delivering real-time SOC, SOH, fault streams, and thermal telemetry to the fleet platform without modifying BMS firmware.
Battery Data Visibility Gap
The BMS leaves the factory, but its data remains on the machine.
Electric machine OEMs invest heavily in battery technology but lose visibility when machines enter service. The BMS tracks cell voltage, thermal events, charge cycle counts, fault history, and degradation curves. Without an edge connectivity layer, this data does not reach engineering teams. Warranty disputes remain unresolved because field evidence is missing. Field failures are diagnosed by replacing parts rather than reading fault logs. Battery degradation patterns that could inform the next product generation are lost. Melqart Systems extracts structured BMS telemetry from the CAN bus or RS-485 interface, normalizes it at the edge, and delivers it continuously to the fleet platform.
Fault-code transparency
BMS fault codes and error events streamed to your platform the moment they occur, with contextual operating data to support remote diagnosis.
Non-invasive CAN integration
Edge gateway reads from the CAN bus or RS-485 interface without firmware changes to the existing BMS, compatible across battery suppliers.
Fleet electrification visibility
Unified telemetry layer across your electric machine range: one data pipeline for SOC, SOH, charge cycles, and thermal events across every model.
The challenge
Where current approaches fall short
Warranty disputes without field evidence
Without field BMS telemetry, teams cannot distinguish genuine product failure from operator misuse or improper charging. Warranty claims are resolved by cost rather than data, and engineering teams gain no product insight from them.
Battery degradation goes undetected until failure
Cell voltage drift, capacity loss, and thermal anomalies develop over hundreds of cycles. Without continuous SOH monitoring from the field, degradation is invisible until it becomes a field failure or a customer complaint.
Mixed electric fleets lack unified telemetry
As OEMs electrify their machine range, each model may use a different BMS supplier, protocol, or data format. Without an OEM-agnostic edge layer, each product line becomes a separate, isolated telemetry problem.
Architecture
How BMS edge connectivity works
Melqart Systems connects directly to the machine's BMS interface, normalizes battery telemetry at the edge, and delivers structured data to the fleet platform over cellular connectivity without modifying BMS firmware.
- 01
BMS Interface
CAN/J1939 or RS-485/Modbus tap
- 02
Edge Gateway
Normalization, buffering, fault detection
- 03
Cellular Uplink
LTE/4G with store-and-forward
- 04
Fleet Platform
Structured telemetry via MQTT or REST
What's included
The Deployment Package
A complete BMS edge connectivity stack: interface integration, edge normalization, cellular connectivity, and fleet platform delivery, ready for serial deployment across your electric machine range.
BMS Protocol Integration
CAN/J1939 bus decoding and RS-485/Modbus integration for direct BMS data extraction. Compatible with major battery suppliers across mobile machine, forklift, and energy storage applications.
SOC & SOH Telemetry
Continuous State of Charge and State of Health streaming with configurable resolution. Cell-level voltage and temperature data normalized to a consistent schema for fleet analytics.
Fault Code & Event Streaming
BMS fault codes, thermal alerts, and protection events delivered to your platform in real time with contextual operating data at the moment of occurrence.
Edge-Buffered Cellular Connectivity
LTE/4G primary connectivity with local edge buffering for guaranteed telemetry delivery during coverage gaps, designed for mobile machines operating in remote or urban-fringe environments.
Technical specifications
BMS Interface Protocols
CAN 2.0A/B (J1939 application layer), RS-485 Modbus RTU, SMBus. Compatible with major battery suppliers including CATL, BYD, Pylontech, and custom OEM BMS architectures.
Battery Parameters Captured
State of Charge (SOC), State of Health (SOH), individual cell voltage, pack temperature, current, fault codes, charge cycle count, and protection event history.
Connectivity
LTE/4G primary with multi-carrier SIM for global deployments. Store-and-forward edge buffer ensures guaranteed telemetry delivery during cellular coverage gaps.
Edge Hardware
Open Linux telematics gateway built for industrial machines, available in enclosed and ruggedized variants for indoor or outdoor installation.
Telemetry Rate
Configurable from 1Hz continuous to event-triggered streaming. Burst logging at higher resolution during fault conditions or thermal events for post-incident analysis.
Integration Standards
MQTT or REST for cloud delivery. JSON or Protobuf payload formats. Compatible with time-series databases (InfluxDB, TimescaleDB) and major fleet telematics platforms.
Applications
Use cases and industries
Electric Crane OEMs
Remote battery diagnostics for electric mobile cranes: tracking SOH degradation across the rental fleet and generating warranty-evidenced fault logs for all field service calls.
Forklift Fleet Operators
SOC and SOH monitoring across large forklift depots: proactive identification of degraded packs before they cause shift disruptions, and charge cycle analytics to optimize charging schedules.
Electric Construction Equipment OEMs
Connectivity layer for new electric excavator and loader product lines: real-time BMS telemetry from day one, with fleet health analytics for the product engineering team.
Battery Energy Storage Systems
Pack-level SOC and SOH telemetry for stationary BESS deployments: real-time visibility across cell strings, thermal management monitoring, and degradation tracking against IEC 62619.
Warranty & After-Sales Teams
Field usage evidence for warranty claim resolution: charge cycles, thermal history, fault log context, and operating condition data at the time of the reported failure.
Results
Key outcomes
“From isolated battery data to continuous fleet health visibility, across every electric machine.”
- Continuous SOC and SOH streaming from every electric machine in the field.
- Real-time fault code and thermal event delivery with full operating context.
- Non-invasive CAN/RS-485 integration: no BMS firmware changes required.
- Multi-vendor compatibility across battery suppliers and machine models.
- Warranty-evidenced field data for dispute resolution and product improvement.
- Serial deployment-ready: the same edge gateway and integration stack across the full electric range.
Related solution clusters
Engineering notes
Engineering notes
Product
Service
Engineering notesHow to Retrofit Industrial Machines for Telematics
A field guide to adding telematics to machines that were never designed for it: reading the data that exists, adding sensors for the data that does not, and surviving the install on a working asset.
Engineering notesFrom CAN Bus to Cloud: A Practical Telematics Architecture
How a single signal travels from a CAN frame on the drivetrain to a row in the cloud, and the decisions that matter at each hop: J1939 decoding, edge filtering, MQTT transport, and store-and-forward.
ProductRouters & gateways
Rugged 5G/4G industrial routers and IoT gateways on open Linux. Modbus, OPC-UA, MQTT. You own the config, data and IP. No vendor lock-in.
ServiceDevelopment services
We engineer and integrate industrial IoT. Connect machines to cloud, ERP and CMMS on open Linux. You own the code, data and IP. No lock-in.
Solution datasheet
Battery BMS telemetry
State of charge, state of health, fault codes and temperatures from every electric machine, read over CAN or RS-485. No BMS firmware change, subject to protocol documentation.
MS-DS-BAT-2026-58 · PDF · 6 pages · English
Frequently asked questions
01How do we get battery BMS data to the cloud without changing BMS firmware?
An edge gateway taps the existing BMS interface (CAN 2.0A/B with the J1939 application layer, RS-485 Modbus RTU or SMBus) and forwards the data to your fleet platform. The integration is non-invasive and requires no BMS firmware changes.
02Which battery parameters are captured?
State of Charge (SOC), State of Health (SOH), individual cell voltage, pack temperature, current, fault codes, charge cycle count and protection event history.
03Which battery suppliers are supported?
Major battery suppliers including CATL, BYD and Pylontech, as well as custom OEM BMS architectures.
04Which gateway hardware is used on the machine?
An open Linux telematics gateway built for industrial machines, available in enclosed and ruggedized variants for indoor or outdoor installation. It reads the BMS on the machine and publishes the data over LTE/4G.
05How is battery telemetry delivered to our platform?
Over MQTT or REST, as JSON or Protobuf payloads, compatible with time-series databases such as InfluxDB and TimescaleDB. A store-and-forward buffer on the gateway holds data through cellular coverage gaps.
Bring battery visibility to electric machines in the field.
Melqart Systems designs the BMS interface, edge normalization, and fleet telemetry pipeline, delivering structured battery health data from day one in the field.