| Energy Bills |
Solar panels in the UK can cut electricity bills by letting households generate their own power. Under the 2026 price cap, a typical dual fuel bill is £1,663, but solar reduces reliance on grid electricity. Savings depend on usage and export rates, not yet confirmed for 2026.
Solar panels in the UK can reduce electricity bills and carbon footprint, but actual savings depend on generation, self-consumption, and export tariffs, with typical dual fuel bills at £1,663 in 2026.
KEY FACTS
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LAST REVIEWED 2026-09-06
How much electricity does a solar panel system generate in the UK?
This output directly offsets electricity bought from the grid, reducing bills.
The generation depends on several factors: roof pitch, direction, shading, and local climate. The Energy Saving Trust provides estimates, but actual output can be checked using the MCS calculator or a professional survey.
To estimate savings, compare the generated kWh to the electricity price cap. Under the Jul-Sep 2026 cap, the typical dual fuel bill is £1,663, but electricity unit rates are separate.
What to check: the system's kWp rating, orientation, and local weather patterns. Also, check the inverter efficiency and any shading from trees or buildings. Real-world data from the MCS database can provide regional averages.
What is the Smart Export Guarantee and how does it pay for excess solar power?
The Smart Export Guarantee (SEG) pays households for excess electricity exported to the grid. Most suppliers offer tariffs, but rates vary. For example, Octopus Outgoing Fixed pays 15p per kWh, while others may pay less. The SEG replaced the Feed-in Tariff in 2019, and rates are not guaranteed.
To benefit, households need a smart meter or an export meter. Rates are typically between 1p and 15p per kWh, with some variable tariffs.
Under the 2026 price cap, the typical dual fuel bill is £1,663, but export payments are separate.
What to check: the SEG tariff's rate, whether it's fixed or variable, and any conditions like time-of-use. Also, check if the supplier requires a smart meter and if there are exit fees.
| Cap period | Typical dual fuel, Direct Debit | Change | Source |
|---|---|---|---|
| Jul to Sep 2026 | £1,663 | Ofgem | |
| Oct to Dec 2026 | £1,723 | 4% | Ofgem |
| From 1 Jan 2027 | to be announced late November 2026 | Ofgem |
How much can solar panels increase a home's EPC rating?
Solar panels can improve an Energy Performance Certificate (EPC) rating by up to 2 bands, depending on the property's current rating and the system size. For example, a home rated D might move to C, or C to B. This uplift is based on the reduction in carbon emissions and energy costs.
The EPC calculation uses the Standard Assessment Procedure (SAP). Solar panels reduce the environmental impact rating and the energy cost rating. The exact uplift depends on the system's capacity, orientation, and the property's existing insulation and heating.
ONS and DLUHC evidence suggests that homes with higher EPC ratings sell for more. For instance, a home moving from EPC C to B could see a value increase of around 5%, but this is not guaranteed. The actual uplift varies by region and market conditions.
What to check: the current EPC rating, the system's kWp, and the property's energy efficiency measures. An EPC assessor can provide a pre-installation estimate.
What is the evidence for solar panels increasing property value in the UK?
UK studies show that solar panels can increase property value by up to 4%, but the effect is not uniform. A 2016 study by the Department of Energy and Climate Change found a premium of around £1,723 for homes with solar, but this varies by region and property type.
More recent analysis by the ONS suggests that energy efficiency improvements, including solar, can add value. However, the premium may be lower if the system is leased or if the panels are old. The actual value uplift depends on the buyer's perception of savings and environmental benefits.
The market may not always reflect this, especially if the system is not owned outright.
What to check: the age and condition of the system, whether it's owned or leased, and local market trends. Also, check if the property has a feed-in tariff that transfers to the new owner.
How do solar panels reduce carbon emissions and benefit the grid?
Solar panels reduce carbon emissions by displacing fossil fuel generation. A typical 4 kWp system saves around 1 tonne of CO2 per year, depending on the grid's carbon intensity. This is equivalent to planting about 50 trees annually.
The grid benefits from distributed generation, reducing transmission losses and peak demand. However, solar generation is intermittent, so it doesn't eliminate the need for backup power. The UK's grid is decarbonising, so the carbon savings may decrease over time.
Under the 2026 price cap, the typical dual fuel bill is £1,663, but solar reduces the amount of electricity bought from the grid, which is often generated from gas. This reduces the household's carbon footprint.
What to check: the carbon intensity of the local grid, which varies by time of day and season. Also, check if the system is eligible for Renewable Energy Guarantees of Origin (REGO) certificates.
What do households often underestimate about solar panel costs and savings?
Households often underestimate the importance of self-consumption. This means that without a battery, a large portion of solar power is exported at low rates.
They also underestimate the impact of standing charges. Under the Oct-Dec 2026 cap, the average electricity standing charge is 54.8p per day, and gas is 29.7p per day. These charges are not offset by solar generation, so a household still pays them.
Another underestimation is the degradation of panels over time. This affects long-term savings.
What to check: the system's degradation rate, the inverter's lifespan (usually 10-15 years), and the cost of replacement. Also, check if the SEG tariff is index-linked or fixed.
| Fuel | Average standing charge (Oct to Dec 2026) | VAT / share | Source |
|---|---|---|---|
| Electricity | 54.8p per day | 0% VAT to 31 Mar 2027 | Commons Library |
| Gas | 29.7p per day | 5% VAT | Commons Library |
| Dual fuel | 84.5p per day | 18% of a typical bill | Commons Library |
How do solar benefits vary between Wales, Scotland, and England?
Solar generation varies by region due to latitude and weather. This affects savings and payback periods.
However, local factors like cloud cover and temperature affect output. Cooler temperatures can actually improve panel efficiency, but less sunlight reduces overall generation.
Under the 2026 price cap, the typical dual fuel bill is £1,663, but the savings from solar depend on the amount of electricity generated and used. In Scotland, lower generation means lower savings, but export rates may be higher if the supplier offers a regional tariff.
What to check: the specific generation estimate for the postcode, using tools like the MCS calculator. Also, check for any regional incentives or community schemes.
What is the typical payback period for solar panels in the UK?
The payback period for solar panels in the UK is typically between 10 and 15 years, depending on system cost, electricity prices, and self-consumption.
However, this is a simple payback and does not account for inflation or rising energy prices. Under the 2026 price cap, the typical dual fuel bill is £1,663, but electricity prices are expected to rise, which could shorten payback periods.
The SEG export rate also affects payback, as higher rates increase income.
What to check: the total installed cost, the expected annual savings, and the export tariff. Also, check if the system is eligible for the 0% VAT rate on installations until 2027.
What are the maintenance requirements for solar panels?
Solar panels require minimal maintenance, but regular cleaning and inspection can ensure optimal performance. Panels should be cleaned if they are dusty or covered in bird droppings, but rain usually suffices.
Monitoring systems can alert homeowners to underperformance. Most systems come with a monitoring app that shows generation in real time. If output drops significantly, it may indicate a fault or shading issue.
Under the 2026 price cap, the typical dual fuel bill is £1,663, but maintenance costs are separate.
What to check: the warranty on panels (usually 25 years) and inverter (usually 5-10 years). Also, check if the installer offers a maintenance package.
How does solar energy interact with the energy price cap and standing charges?
Solar panels reduce the amount of electricity bought from the grid, but they do not eliminate standing charges. Under the Oct-Dec 2026 cap, the average electricity standing charge is 54.8p per day, and gas is 29.7p per day. These charges are fixed per day, regardless of usage.
The price cap sets a maximum unit rate for electricity and gas, but solar generation offsets the unit rate, not the standing charge.
The typical dual fuel bill under the Jul-Sep 2026 cap is £1,663, but this is based on typical usage. Solar households might have lower unit costs but still pay standing charges. The cap is reviewed quarterly, and rates can change.
What to check: the current unit rates and standing charges under the cap, and how they compare to the solar generation profile. Also, check if the supplier offers a time-of-use tariff that aligns with solar generation.
Glossary: the terms on an energy bill explained
kWp: Kilowatt peak, the maximum output of a solar panel system under standard test conditions. A typical UK home has a 3-4 kWp system.
SEG: Smart Export Guarantee, a scheme requiring large suppliers to pay for excess solar electricity exported to the grid. Rates vary by supplier.
EPC: Energy Performance Certificate, a rating from A to G showing a home's energy efficiency. Solar panels can improve the rating.
Standing charge: A fixed daily fee on energy bills that covers the cost of connecting to the grid. It is not affected by solar generation.
Self-consumption: The proportion of solar electricity used on-site rather than exported.
Price cap: A limit on the maximum unit rate and standing charge that suppliers can charge for standard variable tariffs. Reviewed quarterly by Ofgem.
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Disclaimer. This guide is editorial information drawn from primary sources. It is not financial, legal or tax advice and does not recommend any provider. Figures are those published by the named sources on the review date and may change. Kael Tripton Ltd receives no commission, referral fee or lead payment from any provider named on this page. |
Frequently asked questions
Can solar panels eliminate the electricity bill?
Solar panels can significantly reduce electricity bills, but they rarely eliminate them entirely. Standing charges remain, and if you use more electricity than you generate, you still pay for grid electricity. Under the 2026 price cap, the typical dual fuel bill is £1,663, but solar households might pay less for units, yet still face daily standing charges. To maximise savings, increase self-consumption by using appliances during daylight hours or adding a battery.
What is the average export rate under the Smart Export Guarantee?
Export rates vary by supplier, but typical rates range from 1p to 15p per kWh. Some suppliers offer higher rates for customers with batteries or time-of-use tariffs. For example, Octopus Outgoing Fixed pays 15p per kWh, while others may pay less. The rate is not regulated, so it's important to compare tariffs. Under the 2026 price cap, the typical dual fuel bill is £1,663, but export income is separate and not guaranteed.
Do solar panels work in cloudy UK weather?
Yes, solar panels still generate electricity on cloudy days, but at a reduced rate. They rely on daylight, not direct sunlight, so they produce around 10-20% of their rated output in overcast conditions.
Is solar energy worth it in 2026?
Solar energy can be worth it for many UK households, but it depends on factors like roof orientation, electricity usage, and system cost. Under the 2026 price cap, the typical dual fuel bill is £1,663, but rising energy prices could shorten payback. The 0% VAT on installations until 2027 also improves the economics.
Can I get paid for exporting solar power?
Yes, under the Smart Export Guarantee (SEG), most large suppliers must offer an export tariff. You need a smart meter or export meter to measure the electricity you send to the grid. Rates vary, but typical payments are between 1p and 15p per kWh. However, this is income, not a reduction on your bill.
Do solar panels increase home insurance premiums?
Solar panels may increase home insurance premiums slightly, as they add value to the property and pose a risk of damage or theft. Some insurers include them in the buildings cover, while others may require additional coverage. It's advisable to inform your insurer and check if the panels are covered. The cost increase is typically modest, but it varies by provider. Under the 2026 price cap, the typical dual fuel bill is £1,663, but insurance is separate.
