Renewables

Renewable Energy Infrastructure Monitoring

Fiber Optic Monitoring for Solar PV Farms, Battery Storage, Power Cables and Secure Energy Sites

Continuous Asset Insight

Continuous Monitoring Across Renewable Energy Assets

Renewable energy sites distribute electrical equipment across large and often remote areas. Solar modules, DC cabling, combiner boxes, inverter stations, battery containers and grid connections must operate together under different thermal and environmental conditions.

A fault may begin at one connector, cable section or battery rack and remain difficult to locate until performance drops or a wider safety event develops.

FOTAS provides Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) for renewable energy infrastructure.

DTS measures temperature continuously along the sensing fiber. DAS detects acoustic and vibration activity around the cable for perimeter and infrastructure route protection.

Integrated renewable energy site monitoring for solar, wind and BESS infrastructure

KEY CHALLENGES

Key Renewable Energy Monitoring Challenges

Rooftop and utility-scale installations create different operating conditions. Rooftops combine confined cable routes with proximity to buildings and occupants. Solar farms and storage sites cover large areas, often with limited on-site personnel and continuous exposure to UV, dust, moisture and temperature extremes.

PV Thermal Anomalies

Abnormal heating around modules, string cabling and interconnections caused by degradation, mismatch, shading or soiling.

DC Connection Faults

Resistive heating at loose, damaged or degraded connectors, junction boxes and cable terminations.

Inverter and Combiner Boxes

Overheating terminals, load imbalances and cooling-system faults inside critical conversion equipment.

Battery Storage Risk

Localized temperature rise, cooling failure and developing thermal events across battery racks and containers.

Buried Cable Stress

Thermal effects caused by overloading, insulation damage, joints, soil conditions or installation problems.

Remote Site Security

Intrusion, vehicle activity, digging and interference around lightly staffed sites and external infrastructure routes.

DISTRIBUTED TEMPERATURE SENSING

FOTAS DTS for Solar PV Thermal Monitoring

Continuous thermal profiling across panel rows, electrical connections and inverter infrastructure.

Distributed Temperature Sensing

Distributed Solar PV Temperature Monitoring

FOTAS DTS uses optical fiber as a continuous linear temperature sensor. The controller sends laser pulses through the fiber and analyzes Raman backscatter to calculate temperature along the sensing route.

The fiber may follow panel rows, string cabling, cable trays, connectors, combiner boxes and inverter stations. On rooftop systems, it can be integrated into cable pathways or positioned behind panel rows.

At utility-scale sites, the sensing route may continue through electrical trenches and inverter areas, providing temperature information across distributed infrastructure.

Panel rows and string cabling
DC connectors and terminations
Combiner boxes
Inverter stations
Rooftop and utility-scale installations

FOTAS DTS solar PV thermal monitoring with fibre optic sensing

Thermal Anomaly Detection Identifies abnormal temperature development around monitored strings, connections and electrical equipment.

Alarm Location Directs inspection toward the affected panel row, cable section or equipment zone.

Diagnostic Support Temperature trends complement IV-curve, insulation and other electrical diagnostic methods.

RENEWABLE ENERGY ASSETS

Battery Storage and Renewable Power Cable Monitoring

Independent thermal information for storage systems, collector cables and grid connections.

Battery Energy Storage

Rack and Container Temperature Monitoring

Fiber routed along battery racks, power interfaces, HVAC paths and enclosure zones provides distributed temperature information across the container.

Independent Thermal Layer

BMS and Safety System Integration

The battery management system remains responsible for cell-level electrical control. DTS complements the BMS with an independent distributed thermal layer and may support alarms, ventilation, shutdown or suppression workflows.

Renewable Power Cables

Collector and Grid Connection Routes

DTS installed alongside or within power cable routes identifies hot spots at joints and terminations and monitors thermal stress along inaccessible sections.

Cable Utilization

Dynamic Cable Rating Support

Where cable design and operating procedures permit, real-time temperature data can support dynamic cable rating and more informed load decisions.

FOTAS BESS and underground power cable DTS monitoring

DISTRIBUTED ACOUSTIC SENSING

FOTAS DAS for Remote Site and Route Security

Distributed acoustic and vibration monitoring for renewable energy boundaries and external infrastructure routes.

Distributed Acoustic Sensing

Perimeter and Infrastructure Protection

FOTAS DAS converts optical fiber into a distributed acoustic and vibration sensor. Fence-mounted, buried and hybrid installations support solar farm, BESS and substation perimeter security.

Analytics distinguish human activity, vehicle movement, digging and excavation from environmental effects such as wind, rain and wildlife.

Event location data can guide CCTV, patrol or security response. Buried sensing routes also protect external power and communication corridors where visible barriers are limited or impractical.

Solar farm perimeter fences
BESS and substation boundaries
Buried approach zones
External power cable routes
Communication and utility corridors

FOTAS DAS perimeter security and underground fibre optic cable monitoring

System Architecture

Integration, Passive Sensing and Electrical Safety

DTS and DAS control units are installed in inverter stations, control rooms, substations or protected equipment enclosures. Monitoring data connects to SCADA, EMS, BMS, fire alarm, CCTV and security platforms.

The sensing fiber requires no electrical power along the monitored route and is immune to electromagnetic interference. This is valuable around high-current cables, inverters, transformers and battery power interfaces.

Passive fiber does not remove the electrical risks associated with the complete installation. Controllers, power supplies, cable entries, communication interfaces and enclosures must comply with the voltage class, environmental rating and electrical or fire-safety requirements of the site.

Where classified or specially protected areas apply, equipment and installation methods must carry the relevant approvals for that specific environment.

SCADA EMS BMS Fire Alarm CCTV Security Platforms

Solar panel DTS monitoring system architecture diagram

Deployment Design

Key Deployment Considerations

Reliable monitoring depends on how the fiber is coupled to the intended asset and protected from environmental influences.

Outdoor Cable Construction UV-resistant, weatherproof and mechanically robust cable for long-term outdoor exposure.

Thermal Coupling Fiber routing must maintain a useful thermal relationship with cables, connectors, racks and monitored equipment.

Solar Loading Direct sunlight can affect cable temperature independently of the monitored asset. Routing, shielding and alarm settings must account for this influence.

Alarm Zoning Zones should align with panel rows, inverter stations, battery containers and electrical cable sections.

Redundancy Linear, loop or dual-ended configurations according to site availability and criticality requirements.

Explore the Technology Guide

Renewable Energy Monitoring

Monitor Critical Renewable Energy Infrastructure

Talk to our engineering team about a FOTAS DTS or DAS configuration for solar PV farms, battery storage systems, renewable power cables and secure energy sites.

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