How it works

The silicon wafer used in most PV panels is generally either poly-crystalline or mono-crystalline and typically provides a panel sunlight conversion efficiency in the region of 16% and a panel output of +250Wp (watts peak).

Higher performing solar panels are available from Sunpower who manufacturer a range of high performance monocrystalline panels which, due to their patented Maxeon Technology, achieve panel efficiencies of 20-21% and outputs of 345Wp.

The light striking the panels creates DC electricity. The DC electricity generated by the panels is converted to usable AC electricity by an inverter. There are two types of inverter; ones with a transformer and those that are transformerless. Modern types of high frequency and transformerless inverters offer efficiencies in excess of 94% and as high as 97%. Most manufacturers offer a 5 year warranty as standard which can be extended to 20 years at additional cost.

The AC electricity generated is recorded by a Generation Meter and your FiT payments are based on the meter reading taken from this device.

System design

Solar PV arrays are ideally orientated to the south, although as illustrated below they will work effectively in orientations from east through to west with only a nominal reduction in efficiency.

Installation of PV comprise the follow key steps:

• Survey of property for suitability – not all properties are suitable
• Quotation preparation – Providing full specification and cost
• Energy assessment – property must meet minimum energy efficiency to get higher FiT rate
• Structural assessment of roof – not all roofs are strong enough
• Installation of photovoltaic panels to roof
• Installation of inverter to convert the DC electricity generated to usable AC electricity
• Installation of a generation meter to record the amount of AC electricity generated
• Application to receive FiT payments from preferred electricity supplier
• Notification of installation to regulatory bodies and building control
• Preparation and supply of Handover Pack detailing the finished system

If the installation of a solar photovoltaic system interests you and you would like to know more, please contact Paul by email at paul@simssolar.co.uk, by mobile on 07717 004240 or in the office on 01491 836065 for independent advice and a free, no obligation home assessment and quotation.