|
Introduction
Calculating PV output
BP Solar PV Modules
Other PV Modules
PV Charge Controllers
PV Module Mounts
Solar Trackers
PV Module
Roof Mounting
Solar Roofs
Solar Roof Kits
PRICES
Charge
Controller Prices
PV Module Prices
PV Mounting Systems & Tracker Prices
Also see
the section on
inverters
|
Grid Connected Solar Roofs
 Wind
& Sun have been installing grid connected solar systems since 1994. Some
examples can be viewed on our
Projects
pages.
Many options are possible, but the most cost effective approach is to use standard packages with the solar array mounted above an existing roof.
See: Solar Roof
Kits
Other installation methods are possible using standard modules incorporated as the roofing material or using special PV solar roof tiles. Whilst more aesthetically attractive, such systems are generally more expensive and require adequate ventilation incorporated in the roof design to ensure optimum performance.
If mounting a PV array on a roof then the first step
is to determine how many and which type of PV module fits into the
available roof space. It is important to avoid any areas that are shaded
at any time of the year by obstructions such as chimneys, other parts of
the building or trees & aerials. The Solar Horizon
Estimator is a useful tool in assessing this.
A margin should be allowed around the PV array to
reduce wind loadings and to enable access.
Once PV array area has been determined then the
number of modules is matched to inverters and mounting frame dimensions
to decide upon the most cost effective and efficient system.
| Some useful 'rules of
thumb' |
|
8 m² allows ~ 1kWp of PV system. |
|
For most of the UK there are on
average approx. 4-5 peak sun hours in summer going down to
an average 1 hour in winter. |
|
For well sited grid connected PV arrays -
1kWp will produce ~ 800kWh (units) per year. |
| Installed cost for 1kWp PV
system is approx. £5-6,000.00. |
If you would like more technical information then please contact us. We will require information on your property - the array should ideally be south-facing and shading must be avoided. To provide an accurate installation costing, or provide recommendations for different options for mounting the array we will also need details on your roof type & structure. If you are considering incorporating solar onto a new roof then please get in touch at an early stage as many of the most economic fixing solutions are only easily incorporated during the roof design.
Grants are available for these types of system covering up to
£2,500 of the cost.
up
to the top
|
