Robert Porteous
Roofing, Scaffolding & Solar Photovoltaic (PV) Specialists: the North East's first MCS Accredited roofer. We also now specialise in fibre glass roofing.
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t: 01665 833 270
M: 07709 165 734
e: rob@robporteous.co.uk

System Set Up

System set-up
Assessing your building is one of the most important steps to take when making the decision as to whether to purchase a PV system. It is important to know where on your site the PV equipment is to be placed. If this can be estimated accurately energy generation figures can be calculated for your project.

The following factors should be taken into account and will help you assess the feasibility of installing a solar energy system on your property:

Location: Systems should be in locations that will be un-shaded at all times of the day if possible. Gable roofs, chimneys, cables, TV Ariel’s, trees and other buildings in the vicinity should be identified as potentially shading the modules, particularly in the early morning or early afternoon. The performance of a whole panel will be affected even if only part of it is shaded.

Orientation: Solar energy works on all roofs, but the modules should ideally face between south-east and south-west.

Tilt: Solar products are suitable for pitched, flat and curved roofs, although the optimal roof angle is 30 degrees-40 degrees for the UK.

Available area: The more surface area available, the greater the power potential. For a grid connection system the minimum required area is approximately 10m2. In some cases where suitable roof area is not available we can install a solar PV system on garages and out-houses or on a frame located close to the property.

Ventilation: Photovoltaics need to be ventilated (behind the modules) so that they don’t heat up- there efficiency decreases as their temperature rises. Suitable ventilation is easier to ensure for bolt on systems. Rear Ventilation is less important for some thin film modules which can be mounted directly on to the roof cover.

Loading capacity: The system must be carefully positioned to the roof to take account of the loading capacity of the roof.

Meters:  Care must be taken if the systems are to be fitted to social housing properties (or other properties) with pre-payment meters as some meters do not allow the export of electricity and can be damaged by attempted export.

Vermin: If the area is known for a bird population (e.g. seagulls) they may need to be discouraged from perching near the systems to prevent the need for regular cleaning.

Roof mounted:
The PV modules easily align above the surface of the roof. These conventional systems have the advantage that the roof tiles will hardly need to be displaced in order to fasten the panel frame securely, ensuring that this type of installation is the most convenient and economical solution for the majority of existing properties.

 Roof mounted installation systems offer the right fixing units and the right fixing anchors for every module construction type and for every type of roof covering. A large range of modules are available on the market for both grid tied and stand alone.

Roof integrated:
Roof integrated photovoltaic systems are compatible with almost any roof covering. Aesthetically, they are less intrusive than the on- roof systems. There are two methods of roof integrating the PV systems.

pointer PV tilting system. This system is best suited for new build projects or for buildings that are being re-roofed. It is the most expensive of the integrated systems.

pointer PV modules integrated system. Although it is slightly more intrusive than the tiling system it is equally efficient.

pointer Ideally photovoltaics should face between south-east and south-west, at an elevation of about 30-40 Degrees. However, in the UK even flat roofs receive 90% of the energy of an optimum system


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