Aggregating multiple solar strings without compromising safety or yield
Managing multiple solar strings on a commercial or industrial rooftop is where energy yield is won or lost. The String Combiner Box safely and efficiently aggregates multiple solar panel strings into a single DC output – with overcurrent protection, string monitoring, and surge protection built in to safeguard inverters and sensitive PV equipment. Synchro’s combiner boxes simplify installation, reduce maintenance burden, and protect the solar investment your client is relying on you to deliver.
Built to Perform
Multiple string inputs
combines up to 12–24 solar strings into a single output, simplifying complex wiring
Overcurrent protection
DC breakers or fuses on every string prevent malfunctions and short circuits
Surge protection devices
shields electronics and inverters from lightning and transient surges
String monitoring
built-in current sensors enable real-time fault detection and energy optimisation
Weatherproof enclosures
IP65/IP66-rated cabinets resist extreme weather, rooftop heat, and UV exposure
Flexible and scalable design
adapts to a wide range of string counts, voltage ratings, and future expansion
Built to Specification
Enhanced PV system safety
mitigates overcurrent, short circuit, and voltage spike risk
Improved operational efficiency
centralised wiring reduces losses and simplifies maintenance
Real-time string monitoring
identifies underperforming strings before they cost energy yield
Weatherproof and durable
built to perform under harsh outdoor and rooftop conditions
The Synchro Edge
- Recognised Expertise - One of India’s established string monitoring box manufacturers, trusted by EPC contractors, industrial facilities, and utility-scale solar projects.
- Complete Support - End-to-end assistance, from product selection and installation guidance to commissioning and ongoing maintenance.
Where It Works
Factory and warehouse rooftops
- Efficiently combines multiple strings while protecting inverters from overcurrent
- Centralised monitoring keeps PV system performance stable and visible
- Scales easily for larger industrial rooftop installations
Commercial buildings and offices
- Streamlined wiring reduces installation cost and complexity
- Surge protection safeguards sensitive office equipment and inverters
- Real-time monitoring optimises rooftop solar efficiency
Mixed-use industrial complexes
- Supports multiple rooftop PV systems connected to a single inverter
- Ensures safety compliance and protects rooftop electrical infrastructure
- Reduces downtime and simplifies troubleshooting for continuous power flow
What is a string combiner box and why does it matter?
It combines multiple solar strings into a single DC output while providing monitoring, surge protection, and overcurrent protection – critical for safety and yield on commercial and industrial rooftops.
Can it be customised for our project?
Yes — configured by number of strings, voltage, and monitoring requirements.
Where are these typically used?
Factory rooftops, warehouses, office buildings, and mixed-use industrial sites.
Are they weatherproof for outdoor rooftops?
Yes — IP65/IP66-rated enclosures built for harsh rooftop conditions.
Do they offer monitoring?
Yes — optional current sensors and monitoring interfaces for real-time string performance tracking.
Looking for a string combiner box built to endure real rooftop conditions? We manufacture high-endurance, ready-to-install combiner boxes with surge protection and monitoring, configured to your project.