Published by SJ1 Renewables | June 2025
At SJ1 Renewables, we’ve seen the shift first-hand: solar is more affordable, more efficient, and more popular than ever.
And now, the Department for Energy Security and Net Zero (DESNZ) has made it official. Their latest figures show that solar PV costs in the UK are at their lowest in over a decade, and the technology available in 2025 is the best it’s ever been.
Latest Solar Installation Costs in the UK (DESNZ, 2025)
According to the May 2025 data release from DESNZ:
– Domestic systems (<4 kW): Now average £1,400–£1,500 per kW installed
– Mid-size systems (10–50 kW): Down to around £1,100 per kW
That means a 4 kW home system might cost under £6,000 installed—with no VAT and SEG export payments helping to shorten the payback period to as little as 5 years. Coupled with a battery storage solution puts you in control of the power you use.
Read the official DESNZ cost data: Here
Types of Solar Panels Available in 2025
Monocrystalline Panels
– High efficiency (20–23%)
– Great for rooftops
– Available in 350W–500W+ models
Bifacial Panels
– Generate power from both sides
– Ideal for farms and ground-mount systems
– Increase output by up to 15%
Half-Cut Cell Panels
– Better shading tolerance
– Now standard in premium installations
Large-Format Panels (LFP)
– Output of 600W–700W
– Perfect for commercial and agricultural roofs
Solar’s Growing Role in UK Energy
– UK solar capacity reached 17.85 GW in 2025
– Rooftop systems now make up a third of national capacity
– On peak days, solar covers 30%+ of national demand
This isn’t niche anymore—it’s mainstream. And it’s happening on rooftops just like yours.
Why Go Solar in 2025?
– Lowest installation prices in years
– Modern panels are smaller, smarter, and more powerful
– Fast ROI with SEG and tax-free installs
– Future-proof your energy and reduce grid dependence
Whether you’re a homeowner, farmer, or business owner, solar in 2025 is an investment that pays off.
Get a Free Quote from SJ1 Renewables
We’re now booking free consultations for:
– Domestic solar PV systems
– Commercial & agricultural installs (10–250 kW)
– Battery storage add-ons
Request your free quote today through our contact page
SJ1 Renewables
Powering homes, farms, and businesses—cleaner, cheaper, smarter