It is the most common question we get asked. People want to know if solar panels are actually worth the money, or if it is all hype. The short answer: yes, for most UK homeowners in 2026, solar panels are one of the best investments you can make. Here is why, with real numbers.

What does a solar panel system cost in 2026

A typical solar panel installation for a 3-4 bedroom house uses a 5kWp system. That costs between £4,600 and £5,800 fully installed, including panels, inverter, mounting, and all electrical work.

That price includes 0% VAT, which applies to all residential solar installations until at least March 2027. On a £5,000 system, that saves you around £1,000 compared to the old 20% rate. It is a significant incentive that will not last forever.

If you add a battery storage system, expect to pay £7,300 to £8,700 for the combined package. The battery adds £2,500 to £3,500 depending on capacity.

How much will you actually save

This depends on your energy usage, how much solar you use directly, and whether you have a battery. Here are realistic figures for a 5kWp system in Milton Keynes:

  • Solar panels only: £900 to £1,200 per year
  • Solar panels with battery: £1,400 to £1,800 per year

Those savings are based on a grid electricity rate of 28p/kWh. If energy prices rise — and they have risen consistently over the past decade — your savings increase too. Solar is effectively a hedge against future price rises.

Where do the savings come from

Your savings break down into three areas:

  • Self-consumption: Every kWh you generate and use yourself saves you 28p. This is where most of the value sits. A typical household uses 30-50% of its solar generation directly.
  • Battery storage: A battery lets you store excess solar for the evening. This pushes self-consumption up to 70-80%, which means you buy far less from the grid.
  • Export payments (SEG): Any electricity you do not use gets exported to the grid. Under the Smart Export Guarantee, you receive 7-15p per kWh depending on your tariff. It is not a fortune, but it adds up over a year.

The payback period

This is the number that matters most to most people. How long until the system has paid for itself?

  • Solar only: 5 to 7 years
  • Solar with battery: 6 to 9 years

After that, you are generating free electricity for the remaining life of the system. Solar panels are warranted for 25 years and typically last 30 or more. That means 15 to 20 years of pure savings after breakeven.

For a deeper breakdown of how the maths works, see our guide to solar panel payback periods.

How does Milton Keynes compare

Milton Keynes gets around 1,100 peak sun hours per year. That is above the UK average and comfortably enough for strong solar performance. A 5kWp system in MK will generate approximately 4,500kWh annually.

The housing stock works in your favour too. Much of Milton Keynes was built from the 1970s onwards, with good-sized roofs in reasonable condition. Planning permission is rarely an issue — solar panels fall under permitted development in most residential areas.

How does this compare to other investments

Put £5,000 in a savings account at 4% interest and you will earn £200 per year before tax. Put that same £5,000 into solar panels and you save £900 to £1,200 per year — tax free. That is an effective return of 18-24% annually.

The comparison is not even close. Solar panels outperform savings accounts, most ISAs, and even many stock market returns over a 25-year period. And unlike shares, the return is predictable and tied to something you use every day.

What about if you sell the house

Solar panels add value to your property. Research from the Energy Saving Trust suggests homes with solar panels sell for a premium, typically £2,000 to £5,000 more. Estate agents increasingly list solar as a selling point, especially with energy costs front of mind for buyers.

Even if you move within the payback period, you are unlikely to lose money. The panels stay with the house and transfer to the new owner.

When solar panels might not be worth it

Honesty matters. Solar is not the right fit for every home:

  • North-facing roofs only: If your only viable roof faces due north, generation drops significantly. East and west-facing roofs still work well, but pure north is marginal.
  • Heavy shading: Large trees or tall buildings casting shade across your roof for most of the day will reduce output. Partial shading can be managed with optimisers, but total shade is a problem.
  • Very low electricity usage: If you barely use electricity, the savings will be smaller and the payback longer. That said, most households use enough to make it worthwhile.
  • Planning restrictions: Listed buildings and some conservation areas have additional requirements. Not impossible, but worth checking early.

The bottom line

For a typical Milton Keynes household, solar panels in 2026 offer:

  • A payback period of 5-7 years (solar only) or 6-9 years (with battery)
  • Annual savings of £900 to £1,800 depending on setup
  • 0% VAT on installation until at least March 2027
  • 25+ years of system life with minimal maintenance
  • Protection against rising energy prices
  • An effective ROI that beats most traditional investments

The numbers speak for themselves. Solar panels are worth it for the vast majority of homeowners in 2026. The real question is how long you want to keep paying the grid 28p per kWh for electricity you could be generating yourself.

What to do next

Use our free solar calculator to get an estimate based on your actual roof and electricity usage. It takes two minutes and gives you a personalised savings figure. No obligation, no sales calls — just the numbers.

If you want to talk it through, give us a call on 07516 762540 or send us a message. We are based in Milton Keynes and cover the whole of Buckinghamshire.