Homeowner Blog

Britain will see its deepest solar eclipse in decades this evening, with as much as 96% of the sun blocked by the moon in parts of the country, the closest the UK has come to totality since the total eclipse over Cornwall in 1999. The dip lasts around two hours and will barely register on a typical home solar system's annual output, since the effect behaves much like a passing bank of thick cloud. It matters far more to the national grid than to your roof, which is why Octopus Energy is running a UK wide power down session between 6pm and 8pm tonight.

This image was AI-generated.
Plug-in solar panels up to 800W became legal to connect to a UK plug socket on 15 April 2026, and the rule allowing a certified kit to go straight into that socket without an electrician takes effect on 27 August 2026. As of today (31/07/2026), no plug-in product has actually been certified yet, so nothing branded Lidl exists on a shelf today. The numbers are worth knowing regardless: the legal maximum plug-in kit generates roughly 640 to 760 kWh a year, against around 3,400 to 3,800 kWh a year from a typical 4kWp rooftop system in southern England, a four to six times difference.

South-facing solar panels produce more electricity per panel than east or west-facing ones, but east-west systems often produce more electricity overall, and the daily generation profile can be a better match for how most households actually use power. Whether south-facing is "better" depends on what kind of roof you have and what you are trying to achieve.  For many homes, the most useful answer is that neither orientation is best used exclusively. 

Electricity prices are going up roughly 5% this July. For most households that means a bigger bill and not much else. But if you have solar, a rising electricity price works in your favour - in two ways that most payback quotes completely ignore.

The right solar panel for a UK home depends on your roof, not on a ranked list.
A standard pitched tiled roof calls for maximum efficiency per square metre; a shaded roof needs back-contact cell technology that handles partial shade without losing a third of its output; a small roof may need a high-voltage panel just to turn the inverter on in winter. Spirit Energy's design team specifies panels based on roof type and constraints first, and across more than 6,000 installations across England, that approach is what separates a well-performing system from an average one.

China's Ministry of Finance announced on 9 January 2026 that the country would scrap export VAT rebates across a long list of products from 1 April. Solar panels lost the rebate entirely. Battery products had theirs cut from 9% to 6%, with the rest scheduled to disappear on 1 January 2027.

TL;DR:
Yes, you can install solar panels on a flat roof. Modern ballasted mounting systems are non-penetrative, so there is no drilling through your roof membrane. Panels are tilted at around 10 degrees and can face south or be mounted east/west depending on your roof shape. No planning permission is needed for most properties. A south-facing system in southern England generates around 900 kWh per kWp per year. Costs start at roughly £1,200 to £1,800 per kWp for domestic systems.

TL;DR
Solar is not just about lowering your electricity bill. It is a long-term hedge that reduces your household’s exposure to unpredictable energy prices, similar to holding gold for protection rather than speculation.

“I can’t buy solar, I won’t be in this building long enough to see the returns.”  

The Warm Homes Plan is the UK government’s largest ever programme aimed at upgrading existing homes to make them cheaper to run, more energy efficient, and less reliant on fossil fuels.