Solar Power part 2
Up to now it has been accepted that PV installations are implemented outside of the normal building process. Installations are fitted directly by PV suppliers and are accepted by property developers as turnkey projects. Turnkey means that the developer retains complete control over the design of the installation. An important disadvantage here is that people other than the building contractors are present on the building site.
Agreements should be made between the main contractor and the PV supplier, at the earliest possible date concerning the use of the general facilities at the building site, meeting health and safety regulations, and integrating the installation of the PV system into the rest of the construction planning.
PV systems can also be installed under the direct responsibility of the main contractor. Installation of the PV modules and the associated equipment then becomes part of the contract with the construction company. The main contractor remains responsible, even if sub-contractors carry out the actual physical installation. The property developer provides a blueprint specification for installing the system.
The main contractor then instructs a sub-contractor to supply and fit the installation. This sub-contractor might be the PV supplier, but could also be the standard electrical fitter. The advantage here is that installing the PV system then becomes completely integrated into the normal construction process. The disadvantage is that the property developer has less influence regarding the installation. This method can also result in extra costs.
Ensuring that the modules are not damaged during construction is an important consideration. The sequence in which tasks are carried out plays an important role here. Simply preparing for correct placement of the modules can be sufficient to ensure that the final result is less dependent on the implementation, or allow the roof to be finished at a later date.
In this case the roof needs to be sufficiently waterproof to withstand wind and rain for some time without a proper roof covering. Mounting the panels on a roof or facade, where the construction does not need to be penetrated (except perhaps for cables) is therefore an advantage as this makes it relatively easy to seal the roof or facade. Read more