Panel installation and wiring
Is Solar Really Worth It in 2026? Real UK Results After One Year
Pre-sale estimates and payback calculators are useful, but they are projections. What do real UK homeowners find after a year of actual data? Here is how to check your own results, and what typical case studies show about solar and battery performance in 2026.
Helpful video reference. Artisan Electrics' "Is Solar REALLY Worth it in 2026?" revisits two real UK customers one year after their solar and battery installations, walking through actual generation figures, bill savings, SEG payments, and whether the system performed as the installer projected. Artisan Electrics is a Cambridge-based MCS-certified electrical contractor specialising in solar, battery storage and EV charging.
1. Pull your actual generation figure
Your inverter app or monitoring portal shows total kWh generated since commissioning. Compare this to the figure on your MCS installation certificate or the pre-sale projection. A 4 kWp system on a south-facing roof in the south of England typically generates 3,400 to 3,900 kWh a year; in the Midlands and north, expect 3,000 to 3,500 kWh. East Kent, where Sandwich Solar operates, falls towards the higher end of the national range thanks to relatively high sunshine hours for England.
If your system is generating significantly less than the projection, check for shading from new growth, soiling on the panels, or an inverter fault code before assuming the projection was wrong. Most monitoring apps include a fault or event log that will show whether the system went offline for any period.
2. Calculate what you actually saved on imports
The largest saving from solar comes from the electricity you generate and consume directly, replacing what you would otherwise have bought from the grid. Your monitoring app may show this as "self-consumption" or "home consumption from solar." Take the total kWh you consumed from solar and multiply by your current unit rate.
At the October 2025 price cap unit rate of around 24.5p per kWh, consuming 2,000 kWh of solar electricity instead of buying from the grid saves roughly £490 a year on imports alone. Households using more electricity at home during the day (home workers, families, heat pump users) typically self-consume a higher share of their solar output without needing a battery.
3. Add your Smart Export Guarantee income
Your SEG supplier sends an annual statement showing what you were paid for exported electricity. Rates vary widely: the cheapest licensed suppliers offer around 4p per kWh, while better rates from suppliers such as Octopus Energy run to 15p or more depending on the tariff. If you are on a fixed low SEG rate, it is worth checking the market: you can switch SEG supplier without changing your energy supplier.
Households with a battery typically export less because the battery stores surplus generation rather than pushing it to the grid. This reduces SEG income but increases self-consumption savings, which is usually the better outcome at most current unit rates versus export rates.
4. Check whether the battery paid its way
Isolating the battery's contribution requires a monitoring app that tracks battery charge and discharge separately from direct solar consumption. The figure to look at is "battery discharge to home" or "battery contribution," which shows how much grid import the battery avoided. Multiply that figure by your unit rate.
A 5 kWh battery cycling once a day at full depth would save around £448 a year (5 kWh x 365 x 24.5p), but real-world cycling varies: summer days may see two cycles, winter days may see less than one. Most monitoring data shows an effective annual saving from a 5 to 10 kWh battery of between £300 and £600, depending on consumption patterns and tariff. Adding a time-of-use tariff such as Octopus Agile or Go, where overnight import rates are cheaper, can significantly improve battery economics because the battery charges cheaply overnight and saves at the higher daytime rate.
5. What the honest 2026 picture looks like
Real customer data from 2026 confirms that solar panels remain a sound long-term investment for most UK homeowners. Systems installed in 2022 to 2024, when installation costs were slightly higher than today, are tracking broadly to their original projections. The key variables that determine whether yours performs as expected are:
- How much of the solar output you consume directly (higher is better)
- Whether your electricity tariff reflects actual value (switching matters)
- Whether the battery is sized appropriately to your evening load
- Roof orientation and any shading that appeared after installation
Solar is less likely to be worth it in the near term if your roof faces north with significant shading, if your electricity consumption is very low (reducing the import-saving opportunity), or if you are rarely at home during daylight hours without a battery. In those situations, a smaller or differently configured system may still make sense with adjustments.
6. When to call your installer
If your monitoring data shows generation 15 per cent or more below the MCS projection after a full year (accounting for any known downtime), contact your installer. Possible causes include a mis-configured tilt angle, an inverter MPPT string fault, or unexpected shading. Most MCS-certified installers include a post-installation review in their service, and the MCS certificate gives you a reference point for what was specified.
Frequently Asked Questions
Is solar worth it for a UK home in 2026?
For most UK homeowners with a suitable roof and reasonable electricity consumption, solar remains a sound long-term investment in 2026. Real customer data shows that a 4 kWp system combined with a 5 to 10 kWh battery typically saves between £800 and £1,400 a year on bills and SEG income combined, with payback periods of 8 to 14 years on a system that carries a 25-year performance warranty. Homes with higher electricity consumption and those adding an EV tend to see faster payback.
How long does solar take to pay back in the UK?
Typical payback for a 4 kWp solar array with battery storage ranges from 8 to 14 years in the UK, depending on system cost, electricity tariff, self-consumption rate, and whether you use a time-of-use tariff to maximise battery savings. Homes with higher electricity use, EVs, or heat pumps generally pay back faster because more of the solar output is consumed on-site rather than exported for less.
Do I need a battery for solar to be worth it in the UK?
Solar on its own is still worthwhile without a battery, but battery storage significantly improves self-consumption: a household without storage typically uses 20 to 40 per cent of its solar generation directly, exporting the rest for a few pence per kWh. A battery raises self-consumption to 70 to 90 per cent. Whether the extra cost of the battery pays back in a reasonable timeframe depends on your tariff, daily usage pattern, and how often you are at home during the day.