VKA.V0A27.0 – Auxiliary / Control Board for ABB ULTRA Inverters

The VKA.V0A27.0 is an essential auxiliary or control board used in the ABB ULTRA series central inverters, including the ULTRA-750, ULTRA-1100, and ULTRA-1500 models.

This board supports critical auxiliary functions such as power supply management, signal interfacing, protection circuits, or auxiliary control within the modular, liquid-cooled architecture of the ABB/Fimer ULTRA platform. It helps ensure stable operation of the inverter’s power modules, cooling system, and overall control electronics.

In utility-scale solar installations, these boards are exposed to continuous outdoor conditions, thermal cycling, and electrical stress. Over time, this can lead to component degradation, auxiliary faults, communication issues, or unexpected inverter downtime.

Key Benefits of the VKA.V0A27.0

• Supports reliable auxiliary power distribution and control signaling in the 390 kW power conversion modules
• Fully compatible with the high-efficiency (up to 98.4%) and advanced grid-support features of the ABB ULTRA series
• Enables targeted replacement with minimal disruption to the modular inverter design
• Helps maintain system safety, monitoring accuracy, and long-term reliability in harsh environments

At NDC Solar, we specialise in the professional refurbishment of ABB ULTRA central inverters, including expert diagnosis and replacement of the VKA.V0A27.0 auxiliary/control board.

Our Refurbishment & Replacement Services

We provide:

• Detailed inspection and functional testing of the VKA.V0A27.0 board
• High-quality repair or replacement using reliable equivalent components
• Full system integration and load testing to restore original performance
• Comprehensive services covering control boards, power modules, capacitor banks, and complete inverter refurbishment

Addressing issues with the VKA.V0A27.0 promptly can prevent minor faults from escalating, restore full inverter availability, improve efficiency, and extend the operational life of your utility-scale solar assets – all at a significantly lower cost than new OEM parts or full inverter replacement.

Whether you need a single board or a full site-wide refurbishment program, our experienced technicians deliver fast turnaround and proven results for the ABB ULTRA series.

Contact NDC Solar today for a free assessment of your ABB ULTRA inverters and the VKA.V0A27.0 board.