Lightning protection and equipotential bonding

Solutions for all K2 PV mounting systems with a few easy-to-use components

Blitzschutzlösung an einer SingleRail PV-Anlage

For all K2 PV mounting systems: Few additional components

Recommendations for all K2 systems with manual

Plan in K2 Base: Include all necessary parts in the parts list

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Recommendation: Lightning protection and equipotential bonding

You can find out how easy it is to implement lightning protection and equipotential bonding with certain components for all K2 mounting systems in our detailed recommendation. In addition to detailed explanations, you will find numerous examples of equipotential bonding and lightning current-carrying connections as well as general information in the report.

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Things to know about lightning protection

In general, the lightning protection system is a measure to prevent possible damage from lightning strikes. A complete protection system includes all metallic installations, superstructures and components of the PV system. It is supplemented by internal lightning protection, which primarily consists of surge protection.

The effect of an existing lightning protection system should not be impaired by a PV system. Therefore, the lightning protection concept should always be coordinated with a lightning protection specialist.
A new lightning protection system must be designed in such a way that it fulfils its function even without the PV system. In general, specialists should also inspect the lightning protection here as well as check the effects. A protection system that does not comply with the standards can lead to major damage.

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Beispiel Blitzschutz an einer PV-Anlage auf einem Einfamilienhaus

External and internal lightning protection

Important: External and internal lightning protection complement each other to form a lightning protection system.

External lightning protection: External lightning protection provides protection against lightning strikes that would directly affect the system to be protected. It consists of air-termination systems, lightning arresters and earthing systems.
Internal lightning protection: Overvoltage protection, which is the internal lightning protection, includes measures against overvoltages of various kinds. The internal lightning protection also protects against effects from the mains.

Lightning protection system video

The video impressively shows you the path of the current discharge from the lightning strike to the discharge into the earth. (Source: VDB Association of German Lightning Protection Companies)

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Solution for lightning protection

Lightning protection clamps fix the aluminium cables to the rails of the mounting system and ensure that the lightning current is conducted outside the building. The lightning protection clamp is available from K2 as a set:

Lightning protection terminal Multi Set (2002473)
Lightning protection terminal Multi Double Set (2002474)

Catalogue

Beispiel Potentialausgleich an deiner PV-Anlage mit SingleRail Montagesystem

Potential equalisation

If points of different potential are conductively connected to each other, the potential difference existing between them is equalised. An electrical voltage can then no longer be measured between the points and thus a potential equalisation is established.

Earthing is an electrically conductive connection with the electrical potential of the ground. Here, equipotential bonding and the earthing system complement each other to form an effective protection system.

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Solutions and video

Solution for equipotential bonding

and enables equipotential bonding between the mounting rail and the module frame. Download our mounting tips.

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Video on potential equalisation

You can also find the accessories including a mounting recommendation in the TerraGrif overview.

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K2 Base and videos

Selection in K2 Base

You can easily add them and find the selected components in the project bill of materials.

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Screenshot K2 Base mit Auswahl Komponenten Blitzschutz und Potentialausgleich

Earthing, equipotential bonding and lightning protection for photovoltaic systems explained simply