---
title: Seal larger PV systems with inverters!
description: Learn how to effectively seal cable penetrations for larger PV systems with innovative solutions and reliable products and gas-tight installations.
---

[UGA News Blog - EN ](https://uga.eu/en/news)

# [Seal larger PV systems with inverters!](https://uga.eu/en/news/abdichtung-pv-anlagen)

 Written by [UGA](https://uga.eu/en/news/author/uga) | Jun 3, 2024 1:27:37 PM

 

What problem does this cause?

The installed inverters for the PV systems require the laying of AC supply cables, which are often 185 mm². These have a diameter of 25 mm or even larger. This makes the cables more rigid and they can only be routed through our seals with a large bending radius. Our roof ducts, such as the gooseneck, reach their limits due to the curvature.

How did we solve this?

The solution is an adhesive and/or fixed/loose flange construction, which is welded on with straight pipe sleeves at a 45° angle. This allows the cables to be fed through easily without being severely bent. The fixed/loose flange construction is manufactured in accordance with DIN 18533. Pipe diameter, base plate and the intermediate length between base plate and fixed/loose flange are manufactured to customer specifications. The conduit sleeves through which the cables are routed are sealed watertight and gas-tight with a suitable rubber press seal (GPD).

Our DD-PV

Our roof bushing for PV systems (DD-PV) is made entirely of V2A stainless steel and is also suitable for retrofitting. Thanks to its stainless steel design, the DD-PV is resistant to high static loads and ideal for feeding through AC, DC and control cables.

It is also suitable for

- sheet-shaped sealing materials with optional EPDM coating,
- liquid-applied waterproofing materials (KMB; PMBC) with optional fleece and
- fresh concrete composite foil with suitable sealing adhesive if necessary.

 

Here is a voice from the Technical Manager Alex Berhardt from Avantag Energy:

 

 

 

[View full post](https://uga.eu/en/news/abdichtung-pv-anlagen)

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