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High-performance DC surge protection for maximum safety of photovoltaic systems
Reliable DC surge protection is essential to protect PV systems against damage in the long term. Transient surges on the DC side of the PV system caused by lightning strikes, grid disturbances or switching operations can damage inverters, modules and cables – and thus cause significant yield losses.
Reliable
The integrated DC surge protection protects all critical PV components and permanently increases system availability – even under demanding environmental conditions.
Simple
Thanks to their compact design, clear structure and optional plug-and-play elements, the boxes can be installed quickly and safely – ideal for smooth project workflows.
Individual
Flexible cable entries such as cable glands, PV connectors or flying leads allow a perfect adaptation to any system configuration or requirement.
Why surge protection is indispensable for PV systems
PV systems are permanently connected to outdoor modules via their DC lines. This makes them particularly susceptible to surges.
Professional surge protection for solar systems prevents:
Damage to critical components
Costly downtime
Power losses due to undetected faults
Safety risks during maintenance and operation
With integrated DC surge protection, the entire system remains stable, safe and efficient – from residential rooftop systems to utility-scale parks.
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Request surge protection solutions for your PV project now
HIS Overvoltage Protection Boxes (SPD) – reliable DC surge protection for every PV system
HIS surge protection solutions provide robust, standard-compliant protection for all DC and AC system types. They are integrated into numerous HISBox generator connection boxes and effectively protect PV generators, inverters and data lines against transient surges.
Benefits:
Designed for high PV currents and demanding environments
Fast response behaviour for optimal protection
Industry-standard components from leading manufacturers
Long service life and low maintenance requirements
Flexibly configurable for any project size and any grid requirement
SPD technology: Type 2+3 and Type 1+2+3 at a glance
Protection against switching surges and indirect lightning effects
Ideal for residential buildings, commercial systems and PV rooftop systems
High protective effect with compact design
Which systems is the HIS DC surge protection suitable for?
Residential – compact solutions for private rooftop systems
Commercial & Industrial – robust versions for industrial roofs
Utility Scale – high-voltage SPD for 1500V systems
Repowering – surge protection for retrofitting existing systems
Whether a new PV system, system expansion or modernisation: HIS surge protection ensures long-term safety and stable yield.
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Our experts will support you in selecting the optimal PV DC surge protection for your system
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