DC surge arrester type I and II for CORE1

DC Surge Protection for the SMA CORE1 Inverter

Photovoltaic systems are inherently exposed to overvoltage events, whether caused by direct or indirect lightning strikes, or by switching operations on the electrical network. To safeguard the inverter and the broader PV installation, SMA has developed this DC surge arrester kit, specifically referenced for use with the CORE1 inverter.

The combination of Type I and Type II protection within a single kit addresses two complementary levels of surge protection. Type I devices are designed to handle lightning impulse currents, while Type II devices limit residual overvoltages that pass through or are generated downstream. This dual-stage approach is widely recommended and, in many installation scenarios, required by applicable electrical standards.

Compatibility and Intended Use

This kit is exclusively compatible with the SMA CORE1 inverter. It is installed on the DC side of the system, between the solar array and the inverter DC input terminals, where the cabling is most vulnerable to induced surge voltages.

The kit is suitable for grid-tied self-consumption installations, with or without surplus energy export to the grid. Installation must be carried out by a qualified electrician or certified PV installer, in accordance with local electrical regulations.

Kit Contents

This kit is supplied by SMA under part number DC_SPD_KIT5_T1T2AT. As no detailed component list has been provided by the manufacturer at this time, we recommend consulting the official SMA technical documentation or contacting our customer support team for a precise breakdown of the kit contents prior to ordering.

• Complete DC surge arrester kit Type I and II for CORE1
• Manufacturer part number: DC_SPD_KIT5_T1T2AT
• Brand: SMA

Why Install a DC Surge Arrester?

Unprotected PV installations are at risk of irreversible damage to the inverter, solar modules, and DC wiring in the event of a lightning-induced surge. The cost of replacing a damaged inverter or repairing affected cabling far exceeds the investment in a preventive protection kit. In regions with high lightning activity, DC surge protection is often a regulatory requirement.

By using an SMA-specific kit, you ensure full compatibility with the CORE1 inverter, simplifying installation and maintaining the integrity of the system's technical design.

Further Information

For questions regarding compatibility with your specific installation configuration, or to obtain the full technical documentation (SMA product datasheet, wiring diagrams), our technical team is available via the contact form on wattuneed.com. We support both individual installers and professional contractors in selecting the right components for their PV projects.