A common question we get from homeowners is: “Do solar panels actually pay for themselves?”
The short answer: Yes — and usually much quicker than people expect.
If you’re based in North London, here’s what you need to know about solar panel payback periods.
📊 Typical Payback Time in 2025
- 3kW system (~8 panels): Payback in 7–8 years
- 4.5kW system (~12 panels): Payback in 6–7 years
- 6kW system + battery (~16 panels): Payback in 7 years
- 8kW system + large battery (~20 panels): Payback in 6 years
With panels lasting 25+ years, that means nearly two decades of free energy after payback.
💡 How to Speed Up Payback
- Add Battery Storage – Store excess solar and cut grid reliance by 80–85%
- Use SEG Tariffs – Earn money for exporting unused energy
- Switch to EV Charging – Use free solar power for your car
- Smart Tariffs – Charge batteries off-peak, use during peak hours
🏡 Real Case Study – Barnet, North London
- System: 14 panels + 10kWh battery
- Cost: £11,500 (0% VAT)
- Annual Savings: £1,050
- Export Earnings: £180
- Total Payback: ~6.5 years
✅ Why Keenan Solar
When you choose solar panels in North London, you get:
- Transparent quotes with savings explained
- Free scaffolding & bird proofing
- MCS & NICEIC certified installation
- 25-year panel warranties
- 15-year inverter & battery warranties
- Finance options from £99/month
📍 Areas We Cover
We install solar panels across North London, including Enfield, Barnet, Finchley, Highgate, Camden, Southgate, Palmers Green, and Winchmore Hill.
🚀 Invest Once, Save for Decades
Solar panels don’t just pay for themselves — they protect you from rising energy costs and add value to your home.
📞 Call: 020 8133 8704
🌐 keenan-solar.co.uk
📍 North London’s trusted solar installer