Greenlight™ offshore cable monitoring system
The hidden risk in offshore wind infrastructure
Every day a high-voltage cable fault goes undetected, it can cost wind farm operators up to £1 million in lost revenue.
More alarmingly, 70% of these failures start not in the cables, but in the joints and terminations – components that are difficult to monitor and often hidden from view.
Introducing Greenlight™ – smarter monitoring for high-voltage cables
Greenlight™ is Synaptec’s breakthrough offshore cable monitoring system, giving you continuous, automated insight into your cable joints and terminations.
Powered by our patented Distributed Electrical Sensing (DES) technology, Greenlight replaces unreliable, reactive maintenance with precise, predictive intelligence.
Why operators trust Greenlight™
Continuous monitoring
Spot developing issues – thermal stress, electrical imbalance, phase anomalies – before they become failures.
Targeted, proactive maintenance
Act only where needed. Minimise costs, downtime, and emergency repairs.
No power or comms required
Fully passive DES sensors operate over 60 km without the need for power, data networks, or recalibration.
Retrofit or embed with ease
Install sensors in new or existing joints and terminations – ideal for offshore wind farms and transmission networks.
Immediate ROI
Greenlight pays for itself the first time it prevents a shutdown.
How it works
1. DES technology
2. Synthesis® platform
3. Actionable alerts
Outperforms traditional monitoring
| Legacy methods | Greenlight™ |
| Periodic ROV inspections | Continuous, real-time monitoring |
| DTS / DAS | Detects anomalies inside joints & terminations |
| Requires power/data links | Fully passive & maintenance-free |
| Late alerts or missed faults | Precise early warnings & localisation |
Proven in the field
Greenlight is already deployed by offshore wind operators and transmission system owners across the world.
Large-scale rollouts are scheduled for 2025.
FAQs
Q: What causes most high-voltage cable failures?
A: Around 70% originate in cable joints and terminations – not the cable itself.
Q: Can Greenlight be retrofitted to existing infrastructure?
A: Yes, the DES sensors are easily retrofitted or embedded during installation.
Q: How far can Greenlight sensors operate from the substation?
A: Up to 60 km using standard optical fibre.
Q: Is there ongoing maintenance required?
A: No – DES sensors are passive and require no recalibration or field visits.
Find out more
Download our flyer below to see how Greenlight is transforming offshore cable monitoring.
Download Greenlight Flyer
