String Man: Proactive Solar Protection. Intelligent Isolation.
Whether in a standalone installation or a fully blended microgrid, solar arrays are often one of the largest, most valuable, and exposed assets on site. That’s why we developed String Man — a robust, automated protection and monitoring solution designed to reduce risk, extend asset life, and give asset owners full visibility over solar performance.
String Man isolates strings at the first sign of a fault, protecting your system from inverter shutdowns, cascading voltage drops, or worse — electrical fire.
Whether you’re managing a rooftop PV array or a large ground-mount deployment, String Man gives you assurance that your system is monitored 24/7, even in remote or unmanned locations.
🧠 What Does String Man Do?
The String Man system connects directly to solar arrays and provides real-time string-level monitoring, automated fault isolation, and proactive system alerts. It meets EN60947-3 and Low Voltage Directive 2014/35/EU standards for isolation, offering functionality far beyond standard “fireman switch” installs.
🔒 Why String Man?
✅ Monitors up to 10 strings per unit
✅ Detects cascading voltage drop, shading, weather or component failure
✅ Automatically isolates affected string(s)
✅ Maintains safe operation with battery-powered backup for 48 hours
✅ Operates completely offline and independently from site systems
✅ Provides real-time alerts via secure VPN (Starlink, 4G)
✅ Sends notifications to asset owner, O&M partner, and Lugh team
✅ Prevents inverter overload and full-array shutdown
✅ GUI access to logs, historical data and active system status
String Man is your first line of defence — against faults, against fire, and against preventable downtime.
| ⚙️ Key Feature | 🎯 Benefit to Asset Owner |
|---|---|
| 🧠 Real-time string-level monitoring | Immediate visibility on system performance and fault identification |
| ⚡ Automatic string isolation (up to 10 strings/unit) | Prevents cascading failures and avoids system-wide shutdowns |
| 🔋 48-hour battery backup | Continued fault protection and alerting during grid/power failure |
| 🔒 Secure offline operation with VPN polling | No reliance on site systems, cloud or public networks |
| 📨 Multi-party alerting (owner, O&M, Lugh) | Rapid issue response, minimising downtime and risk |
| 📋 Complies with EN60947-3 & 2014/35/EU | Future-proofs system for compliance and insurance standards |
| 📊 Weekly data logs + GUI dashboard | Data-led insight for performance tracking and reporting |
🛠 Integration Made Simple
String Man is already embedded within the Lugh Microgrid design, working alongside your inverters, isolators, and Lugh View EMS. It communicates securely and independently — even in remote desert, mountainous or maritime sites. All data is securely transmitted via Starlink or industrial 4G using VPN or existing network infrastructure.
🛡 A Smarter Standard for Solar Safety
In markets where isolation standards are still evolving, String Man sets the benchmark. It’s a no-compromise safeguard for valuable assets in challenging environments — from Oman to the Baltics and beyond.
🤝 String man in conclusion
String Man is your silent sentry — monitoring your solar strings 24/7, isolating faults instantly, and safeguarding performance without ever relying on your main site systems.
✅ Automated protection from voltage drop, string failure, and inverter shutdown
✅ 48-hour battery backup and offline operation for remote, unmanned sites
✅ Live alerts and data logs for owners, O&M partners, and compliance teams
Built for harsh environments, trusted in critical infrastructure — String Man ensures your solar works when it matters most.
