Monitor Solar String Performance and Identify Faults Earlier
In utility-scale solar power plants, monitoring individual PV strings can help identify abnormal operating conditions before they affect overall system performance. A String Monitoring Box (SMB) collects string-level electrical measurements and, depending on its configuration, supports the detection of faults and underperforming strings.
Synchro Electricals offers string monitoring box solutions for utility-scale solar projects, with configurations based on system requirements and project specifications. Designed to support monitoring and troubleshooting, these solutions help EPC contractors, solar developers and plant operators gain better visibility into solar DC circuits.
Built to Perform
Real-time string monitoring
Monitors individual string parameters, such as current and voltage, where supported, to help identify abnormal operating conditions.
SCADA System Integration
Supports integration with plant monitoring systems when compatible communication interfaces and protocols are specified.
Multiple String Configurations
Available input configurations can be selected according to the project's string count and electrical design requirements.
Weather-Resistant Enclosure
Enclosure options can be selected to suit outdoor solar installations and the environmental conditions at the project site.
Project-Specific Configuration
String inputs, electrical ratings, monitoring functions and protection components can be specified according to project requirements.
Electrical Protection
Can incorporate DC fuses, isolators and surge protection devices, depending on the approved system design and selected configuration.
Built to Specification
Explore our range of String Monitoring Boxes (SMBs) for solar PV applications, including utility-scale solar power plants. Configurations can be selected according to string inputs, electrical ratings, monitoring requirements and project specifications to support effective system monitoring and reliable operation.
SMB-8
monitors up to 8 strings, suited for commercial and small rooftop systems
SMB-12
monitors up to 12 strings, ideal for medium-sized industrial and commercial systems
SMB-24
comprehensive 24-string monitoring built for utility-scale solar farms
Standard features
fuses, isolators, surge protection devices, IP65/IP67 waterproof enclosures, SCADA compatibility
The Synchro Edge
- Used from industrial to utility-scale: Our string monitoring boxes serve EPC companies and solar developers on both industrial and utility-scale solar projects.
- Support at every stage: Help with choosing the product, installation guidance and ongoing maintenance.
- Protection-Focused Design: Protection components selected according to the electrical design and project requirements to support safe operation of solar DC circuits.
- Project Coordination: Coordination around agreed specifications, documentation and delivery requirements to support project planning and procurement.
Where It Works
Utility-scale solar power plants (500kW–1MW+)
- Real-time performance monitoring across individually controlled strings
- Fast fault detection prevents small issues from becoming costly downtime
- Historical performance data supports predictive maintenance and ROI optimisation
- SCADA integration enables centralised oversight from a single control room
Commercial solar installations (50kW–250kW)
- Consistent energy output through per-string performance tracking
- Lower maintenance costs via early anomaly detection
- Integrates with building energy management systems
- Scales easily as commercial installations grow
Industrial solar systems
- Continuous monitoring maintains steady energy supply for critical operations
- Prevents reverse currents, voltage swings, and surges
- Detailed reporting supports data-driven maintenance scheduling
- Built to support future expansion of industrial solar infrastructure
Off-grid and hybrid solar systems
- Reliable power continuity in remote installations
- Remote monitoring and fault alerts without a site visit
- Adaptable to varying environmental demands and capacities
- Early fault detection extends the lifespan of critical solar assets
What does a String Monitoring Box do?
Monitors the performance of each solar string individually – voltage, current, and fuse status – enabling real-time fault detection and optimal system efficiency.
Does it integrate with SCADA?
Yes — supports RS-485 Modbus RTU for centralised SCADA monitoring.
What capacities are available?
From 8-string rooftop systems to 24-string utility-scale deployments.
Can SMBs be used commercially as well as at utility scale?
Yes — suited to utility-scale farms, off-grid installations, commercial rooftops, and industrial solar systems alike.
Are String Monitoring Boxes suitable for outdoor installation?
They can be supplied with enclosures suited to outdoor installation, depending on the available model and required ingress protection rating. The appropriate enclosure should be selected according to site conditions and project specifications.
What protection features can an SMB include?
Depending on the specified configuration, an SMB may include DC string fuses, isolators and surge protection devices. Component selection should follow the project’s electrical design and applicable requirements.
Looking for a string monitoring box that catches faults before they cost you yield? We deliver custom-designed, pre-tested monitoring panels for projects of any size, with pan-India delivery.