Are you wondering whether it’s worth installing solar panels if you live in London? You’re likely weighing up the pros and cons specifically for your property and energy usage, and may well have considered the weather. If you’ve completed this step or haven’t started yet, this article was written for the purpose of sharing additional information to help you make an informed decision.

Cost of Electricity from a Supplier Over 30 Years

A major influence in your decision process is likely to be the cost of electricity from an energy supplier – whether it’s the cost today or over the lifespan of quality solar panels supplied by EHGE Solar Solutions. 

According to GreenMatch, the average 4-person household consumes 3,500kw/h of electricity per year. Ofgem’s price cap for electricity is 34p per kw/h, which equates to £1,190 a year until March 2023. 

In light of Russia’s attack on Ukraine, it’s likely to assume the price cap for electricity will continuously be updated. Therefore, wishful calculations show that over the duration of 30 years, electricity for an average 4-person household could cost £35,700. This is expected to increase; it could end up costing £50,000 over the next 30 years, if not more.

Cost of Solar Panel Installation

As you may already know, the cost of installing solar panels ultimately depends on how much energy your family consumes.

In London, let alone the UK, it’s unlikely that a 4kw (4000 watts) system with 16 solar panels (250 watts each) will supply 4,000kw/h over the course of 12 months, even though that’s what it’s designed to do and most suitable for an average 4-person household.

If it did, however, it would mean an average family of 4 could supply their 3,500kw/h and even sell 500kw/h to their connected energy supplier. Thus, generating a small income while being self-sufficient in this area. It’s unlikely due to reasons we’ll uncover later in this article.

Anyway, back to the cost of a 4kw solar panel system. It’s between £6,000 to £8,000 according to GreenMatch, SolarGuide believes it’s around £6040, and EnergyGuide provides an approximate range between £5,000 and £8,000. 

If you’d like a free quote specifically for your property and energy consumption, get in touch with EHGE Solar Solutions.

Estimated Electricity Generated by Solar Panels in London

I eluded to the fact that a 4kw solar panel system won’t generate 4000kw/h of electricity. It’s simply due to the weather in the UK, or more specifically London, which is one of the best places to live for solar panels.

London has 190 days of 8 hours of direct sunlight. This means those 190 days, the solar panel will provide ample electricity. In other words, 100% efficiency (250 watts per panel depending on its position on the roof). However, the remaining 175 days will require dependence on an energy supplier. This is a simple scenario. 

Of course, some days will have more or less than 8 hours, so depending on energy consumption, you may give to the energy supplier or take from the energy supplier. This will also vary if you’re storing electricity in a Tesla Powerwall, for instance. 

Estimated Saving on Electricity Bills

Assuming a 4-person household consumes 3,500kw/h of electricity a year, that’s approximately 9.6kw/h of electricity a day. A system that can produce 4kw would only need direct sunlight for just over 2 hours to cover the day, but you’d need to store electricity that’s generated but not used at that time. Otherwise, you sell it for pennies to your energy supplier under the Smart Export Guarantee (SEG) scheme.

So, as you can imagine, it’s very difficult to calculate your savings on electricity bills. Some days you’ll use more than you have generated, typically in the winter months. And, some days you’ll produce more than you need, typically in summer months. If you’ve got electricity storage in, say, a Tesla Powerwall that can hold approx. 13kw/h, it could cover you for a day and a half before drawing from your electricity supplier. 

In the example above, you’d have saved £3.26 (.34 pence x 9.6 kw/h a day) on your electricity bill. Then, potentially gained 24p (.6 pence x 4kw) for every hour of excess electricity that day, say 5 and half hours, you’d gain £1.32. When combined, in this example, that gives you your total daily saving of £4.58.