A solar photovoltaic (Solar PV) system works by absorbing light from the sun and converting it into electricity within the solar panel. This electricity is then fed directly into an existing power supply of the property of which it is installed and can be used within the household or even sold back into the national grid via your electrical energy provider. The result of this process means clean and free energy generated entirely by your household.
kWh and kWp
Solar PV systems are rated in KWP (Kilowatts Peak); this is the rate at which the system generates electricity at peak performance. So essentially the more surface used for solar PV panels, the higher the KWP will be. The amount of energy generated by solar PV is measured in KWH (Kilowatt Hours). This varies due to a number of factors such as orientation, tilt, how much sunshine the install site receives and the overall size of the system.
A typical household solar PV system is rated between 1.5 and 3kWp each kWp should generate around 800 -850 kWp per year in ideal conditions so the typical will generate roughly 1200 2400 kWh per year. To put that into perspective, the average typical household uses 4000kWh on lighting and appliances so a solar PV system could cause you substantial savings on electricity bills. And also while saving you money on energy bills, it also saves over a tonne of carbon dioxide per year, meaning over the lifespan of the system, it will save over 30 tonnes of carbon dioxide.
Throughout the year, the amount of power generated by the solar PV system varies, during summer months it can generate up to 250kWh per month and during winter months where sunlight is lower it can generate as low as <50kWh.