A 3kW solar panel system costs around £9,000 to buy and install. If you want to add a battery to this system, it’ll push the price up by about £2,000, for an overall cost of £11,000.
According to Ofgem, in the UK we use about 2700kWh every year or 7kWh per day. Now, at peak performance, a 3kW solar panel system produces 2500kWh per year or just under 6kWh per day. In theory then, 3kW solar panel systems can provide enough energy to power most homes, but of course, there are other factors to consider too.
A 3kW PV system will produce around 2,500 kWh of electricity per year. The solar panel system will consist of 20 × 150-watt panels (low efficiency), 15 × 200-watt solar panels (average efficiency), or 12 × 250-watt solar panels (latest technology). You may be asking yourself ' how many solar panels do I need for a 3 kW system?'.
Although a 3kW solar PV system is under the widely accepted standard size system of around 4kW, you can still save money, make your home more energy efficient and generate an attractive pay-back period by installing a 3kW solar panel system.
A 3 kW solar panel system is an ideal size for a large two-bedroom property or a small three-bedroom home, with an average electricity consumption of 2,200 kWh per year. Owning solar panels will shrink your energy bills and your carbon emissions – you’ll be powering your home with clean electricity generated using the power of the sun.
The optimal pitch of the roof is anything between 40 and 12 degrees and of course, the less shading the better. A 3kW system will be less expensive than a larger system making it a good option for those with a limited budget. Make sure you get a range of quotes, prices can vary dramatically. See our guide for getting solar panel quotes.