Going Solar in SE21, SE22 & SE23: Why Local Homes and Businesses Trust Knight & Day Solar Installations

09/10/2025

If you live or work in South London’s SE21, SE22 or SE23 postcodes, you’ve probably noticed more solar panels appearing on rooftops in Dulwich, East Dulwich, Forest Hill, Sydenham, and Peckham Rye. Rising energy bills, climate concerns, and government

Incentives are driving demand for Solar PV systems but one question remains: who should you trust to install them?
At Knight & Day Solar Installations, we specialise in helping South London homeowners and businesses cut their energy bills, reduce carbon emissions, and take control of their power with high-quality solar PV and battery storage systems.
Here’s why installing solar in SE21, SE22 and SE23 with Knight & Day is one of the smartest investments you can make.

1.Reduce Energy Costs and Protect Against Rising Bills

Electricity prices in the UK have climbed steadily in recent years, and households across South London are feeling the impact. By generating your own clean electricity from solar panels, you can:

  • Cut monthly energy bills – many homeowners save hundreds of pounds a year.
  • Earn from excess power – through the Smart Export Guarantee (SEG), you can sell unused electricity back to the grid.
  • Future-proof your home – solar panels typically last 25+ years, meaning long-term savings.


For businesses, especially those in retail or hospitality around Lordship Lane or Forest Hill, solar reduces overheads and improves sustainability credentials something increasingly important to customers.

2.Quick, Hassle-Free Installation

We know that disruption is a big concern for homeowners and businesses. That’s why Knight & Day Solar focuses on:

  • Efficient surveys and designs tailored to your property.
  • Fast installation times – most domestic systems are completed in just a couple of days.
  • Minimal disruption – our team works carefully and cleanly, leaving your property as we found it.


Thanks to our local base in South London, we’re never far away. That means you’re not waiting weeks for call-outs or site visits.

3.The Environmental Benefits

Switching to solar isn’t just about saving money. It’s also about reducing your carbon footprint. Solar PV panels generate 100% renewable energy, cutting reliance on fossil fuels. An average South London home can save over a tonne of CO₂ emissions per year simply by switching to solar.
With more families and businesses in SE21, SE22 and SE23 investing in sustainability, going solar also boosts your property’s green credentials a key selling point if you’re looking to increase home value.

4.Why Choose Knight & Day Solar?

Choosing a trusted local installer makes all the difference. At Knight & Day Solar Installations, we pride ourselves on:


✅ Local expertise – we know the rooftops, planning rules, and conservation considerations in Dulwich, East Dulwich, and surrounding areas.
✅ Tailored solutions – from family homes to schools, shops and offices, we design systems that meet your specific energy needs.
✅ Battery storage options – store excess solar power to use at night or during peak times.
✅ Customer-first service – from your first consultation through to aftercare, we’re with you every step of the way.
✅ Trusted reputation – we’ve built our business on recommendations and repeat customers across South London.

5.Making the Switch Has Never Been Easier

With VAT exemptions on domestic battery storage (since 2024) and long-term energy savings, there has never been a better time to switch to solar. And because we’re based right here in South London, we make the process straightforward, affordable, and stress-free.

Final Thoughts

If you’re in SE21 (Dulwich, West Dulwich), SE22 (East Dulwich, Peckham Rye) or SE23 (Forest Hill, Sydenham) and thinking about solar panels, the benefits are clear:

  • Lower energy bills
  • Quick, professional installation
  • Reduced carbon emissions
  • A more sustainable future for your family or business


At Knight & Day Solar Installations, we’re proud to be South London’s local solar specialists. Whether you’re ready to install panels immediately or just exploring your options, we’re here to help you make an informed, confident decision.