A solar array is a collection of solar panels that convert sunlight into electricity. This article discusses the types of roofs suitable for solar arrays, including concrete, tile, and corrugated panel roofs, along with their installation techniques and advantages.

What types of roofs are suitable for solar arrays?

There are three main types of roofs suitable for solar arrays: concrete roofs, tile roofs, and panel roofs (iscorit). Each type requires a specific racking system and installation technique to ensure optimal performance.

Concrete Roof

Concrete roofs are typically flat, requiring a racking system that adds a 5-20 degree tilt to the panels. This tilt helps maximize sunlight exposure and system efficiency. The system infrastructure connects to 30-40 kg concrete slabs placed on tar strips to prevent damage or leaks, eliminating the need for drilling.

Tile Roofs

Tile roofs have a predetermined angle based on the roof's pitch. In Israel, it is illegal to alter this angle with a racking system. The racking system for tile roofs runs parallel to the roof and is secured using hooks and Z-shaped iron clasps installed beneath the tiles, resting on wooden support beams.

Panel Roof (Iscorit)

Panel roofs usually have a shallow pitch of 3-5 degrees. Engineers will add tilt to the panels using an aluminum racking system. This system requires drilling into the metal support beams beneath the roof, necessitating careful sealing to prevent leaks. Proper installation involves drilling from the peak of the roof, using rubber EPDM strips, sealed screws, and additional layers of sealant.

Combined Roof Types

For roofs with various types, engineers will create a plan that accommodates the different materials. Kedma Solar's teams are trained to install systems on all roof types effectively.

Roof Angle (Azimuth and Pitch)

The tilt of the roof, including its pitch and azimuth, is crucial for maximizing solar output. South-facing panels receive the most sunlight, while east or west-facing panels produce 85-90% of the output of southern-facing panels. North-facing panels yield 75-80% of the output. A well-planned system will prioritize south-facing panels while still incorporating some north-facing panels to enhance overall return on investment.

Components of a Solar Array

A solar array consists of several key components, including solar panels, an inverter, and a controller. These components work together to convert sunlight into usable electricity.