PVI-STRINGCOMB String Combiner Box for ABB / Aurora / Fimer Central Inverters

The PVI-STRINGCOMB (also known as Aurora PVI-STRINGCOMB or PVI-STRINGCOMB-S) is a robust DC string combiner box designed by ABB (Power-One / Aurora) as the ideal complement to the ABB ULTRA series and other Aurora PVI central inverters.

This string combiner box collects and protects multiple PV strings before feeding them into the central inverter. It supports up to 10 channels (individual or paired strings), with individual string current monitoring via Hall-effect sensors, fuse protection, surge protection devices (SPDs with removable cartridges), and optional disconnect switches.

Key Features and Benefits

• Individual String Monitoring – Accurate real-time measurement of each string current, total voltage, and fuse status for early fault detection and maximised energy yield.
• Comprehensive Protection – Includes overcurrent fuses, reverse polarity protection, and surge protection to safeguard the PV array and inverter in utility-scale installations.
• Seamless Integration – Communicates via RS485 with ABB ULTRA, PVI-CENTRAL, and other Aurora central inverters, enabling full system-level monitoring and control.
• Outdoor-Rated Design – Built for harsh environments with high reliability, making it suitable for large commercial and utility PV plants.
• Reduced Cabling & Losses – Consolidates multiple strings into fewer inputs to the central inverter, lowering installation costs and improving overall system efficiency.

In demanding solar installations, components such as fuses, surge protectors, monitoring sensors, or communication boards can degrade over time due to environmental stress, lightning events, or continuous operation — leading to string imbalances, lost production, or inverter faults.

At NDC Solar, we specialise in the refurbishment and repair of ABB / Fimer central inverters and their complementary components, including the PVI-STRINGCOMB string combiner boxes.

Contact NDC Solar today for a free assessment of your PVI-STRINGCOMB string combiner boxes and ABB ULTRA inverters.