A 15 kW solar system can substantially benefit homes and businesses, potentially saving around £58,980 over its 25-year lifespan. This estimate is based on current electricity prices and could be even higher considering inflation and future price increases.
Summary (TL;DR)
Key facts about this topic:
- A 15 kW solar system costs around £19,000 including installation and VAT
- The system can save approximately £2,359 per year on electricity bills
- It requires 30-56 solar panels depending on panel efficiency
- Annual energy production averages around 13,903 kWh in southern UK
01Rising Electricity Costs
Electricity prices in the UK have been rising faster than the inflation rate, as illustrated by Ofgem’s recent price cap increases. The continual rise in electricity costs is crucial when deciding if a 15 kW solar system is the right choice for you.
02Smart Export Guarantee (SEG)
The Smart Export Guarantee (SEG) replaced the older Feed-in Tariff (FiT) scheme, allowing you to get paid for the excess energy your 15 kW solar system produces but does not use. For instance, if your system generates surplus energy while you are away during the day, you can earn up to 15p per kWh for electricity exported back to the grid. With a typical 15 kW solar system, you could receive about £1,147 annually under this scheme, based on current rates from providers like Octopus Energy.
03Electricity Savings
One of the primary benefits of installing a 15 kW solar system is the significant reduction in electricity bills. Using the electricity generated by your solar panels during the day can decrease your reliance on the utility company. This is particularly advantageous if you own an electric vehicle, as you can offset fuel costs by using your self-generated electricity. With a 15 kW solar system, you can expect to save approximately £2,127 annually by using your solar energy.
0415 kW Solar System Price
The typical 15 kW solar system cost in the UK, excluding a battery, is around £19,000, including installation and VAT. The long-term savings and potential earnings from the Smart Export Guarantee can mitigate this upfront investment.
05How Many Solar Panels for a 15 kW System?
Modern solar panels have power ratings between 300W and 500W. Therefore, a 15 kW system would require between 30 and 56 individual panels, depending on the panel’s efficiency.
06How Big is a 15 kW Solar Array?
Each solar panel takes up about 1.6 square meters. Thus, a 15 kW solar system would need between 49 and 91 square meters of space, depending on whether you opt for more efficient (and usually more expensive) panels or less efficient ones.
07How Much Does a 15 kW Solar System Produce in the UK?
On average, a 15 kW solar system in the southern UK produces around 13,902.82 kWh annually. Several factors influence this output, including:
- Shading: Obstructions like trees or buildings can reduce efficiency.
- Location: Geographic location within the UK impacts sunlight availability.
- Roof direction and tilt: Optimal orientation and angle maximize solar capture.
- Time of year: Seasonal variations affect solar energy production.
- System efficiency: The overall efficiency of components plays a significant role.
0815 kW Off-Grid Solar System in the UK
For those considering an off-grid solar solution, a 15 kW system could be a viable option. Important considerations include calculating the size of the battery needed to store energy for use when solar production is low. You would need to purchase between 30 and 56 solar panels, depending on their power rating.
Getting a 15 kW solar system offers significant financial and environmental benefits for homes and businesses in the UK. With the rising electricity costs and government incentives like the Smart Export Guarantee, now is an excellent time to consider going solar. The initial 15 kW solar system cost and 15 kW solar system price in the UK may seem high, but the long-term savings and potential earnings make it a worthwhile investment.
A 15 kW solar PV system is an excellent choice for those looking to save money, reduce their carbon footprint, or gain energy independence. Evaluate your energy needs, consider your roof space, and explore the potential savings and earnings from solar power to determine if a 15 kW solar system is right for you. Remember to factor in the solar panels and battery cost when planning your investment.
Manan co-founded Solar4Good to do solar differently, as a partner, not a salesperson. After 15 years in London finance, he treats a solar system as the financial decision it is: every customer gets an honest, numbers-first projection of cost, savings and payback, not a sales promise.
