Understanding Solar PV

How does Solar PV work?

SPV systems consist of a cluster of solar panels that convert sunlight into electrical energy using specialized solar cells. These cells are composed of thin layers of a semiconductor material, usually silicon, sandwiched between layers of glass.

Initially, the electricity generated by the panels is in the form of direct current (DC). To make it usable in homes, it goes through an inverter that converts it into 240V alternating current (AC). This AC power can then be utilized by various household appliances like washing machines or TVs when the solar panels are actively producing electricity.

In case there is an excess of electricity generated, it is fed back into the electricity grid. Energy suppliers offer the opportunity to be compensated for this surplus energy through "Smart Export Guarantee" tariffs, with payment rates varying among different suppliers.

If you prefer to store the surplus energy for later use, there are additional devices available. This excess energy can be stored as hot water in a hot water cylinder or as electricity in a domestic battery.

Solar PV ratings- what are they?

Solar PV systems are evaluated based on their kilowatts peak (kWp) rating, representing the maximum electricity generation capacity of the panel array under ideal conditions. These conditions typically include a sunny day at noon with the panels facing south.

The actual electricity generated by solar panels is measured in kilowatt-hours (kWh), which is the same unit of measurement used in household electricity bills. However, it's important to note that a 1 kWp panel array seldom generates a continuous power output of 1 kW. In most cases, the output will be lower. The kWp rating of a solar array depends on factors such as panel size, type, and quantity. A typical kWp rating for an array is around 3-4 kWp.

The total electricity production over a year is influenced by several factors, including the system's location (orientation of the panels), shading, local sunlight conditions, and the system's kWp rating. On average, you can anticipate generating between 700 and 900 kWh per installed kWp. However, the actual output varies considerably from season to season. It's worth noting that while the average household consumes around 3,000 kWh per year, not all of this will be replaced by the electricity generated unless conscientious efforts are made to maximize its utilization.

Peace of Mind with Greenstorm Renewables

We're accredited to install Solar by the Microgeneration Certification Scheme (MCS) and are members of the Renewable Energy Consumer Code (RECC). For added assurance, we're Trustmark Registered, the only Government Endorsed Quality Scheme, for work carried out in or around your home.

We also take safety and the environment seriously - we're CHAS accredited, demonstrating our safety, and environmental commitment, so you can be assured you're in safe hands.