Understanding your average monthly electric bill with solar panels in the UK

Published on 24 Apr 2026

Installing solar panels can significantly change your average monthly electric bill in the UK, moving you towards greater energy independence and even potential earnings. This guide will help you understand the financial impact of solar panels and what to expect on your energy statements.

Considering solar panels for your home? With Fuse Energy, you get clear pricing, real-time usage data, 24/7 human customer support, and a modern energy experience designed around you. Switching takes as little as 3 minutes, so you can take control of your bills from day one. Click here to switch to Fuse Energy today and start saving.

How solar panels change your monthly electric bill

Installing solar photovoltaic (PV) panels fundamentally alters your energy consumption and, consequently, your average monthly electric bill. Instead of relying solely on electricity from the national grid, you generate your own power. This self-generated electricity is first used to meet your home's immediate needs, directly reducing the amount you need to import from your energy supplier.

Any surplus electricity your panels produce that isn't immediately consumed is automatically exported back to the grid. This exported energy can earn you money or credit through schemes like the Smart Export Guarantee (SEG). The net effect on your average monthly electric bill with solar panels UK is a combination of lower import costs and potential earnings from export, leading to a significantly reduced, or even credit-positive, statement each month.

Reducing your grid import and earning from export

The most direct way solar panels impact your bill is by cutting down your grid import. Every kilowatt-hour (kWh) of solar electricity you use yourself is a kWh you don't buy from your supplier at retail rates. This is known as 'self-consumption' and is the most valuable use of your solar power.

When your solar panels generate more electricity than your home needs, the excess is automatically fed into the national grid. Under the Smart Export Guarantee (SEG), energy suppliers pay you for each unit of electricity you export. This means your average monthly electric bill with solar panels UK isn't just about what you save, but also what you earn, further enhancing your financial returns.

Key factors influencing your solar electric bill

Several factors play a crucial role in determining the overall financial impact of solar panels on your electricity bill. Understanding these can help you maximise your savings and earnings.

Installation costs, savings, and payback periods

The initial investment in solar panels is a significant consideration. In the UK, the average cost for a typical 3-4 kilowatt-peak (kWp) system can range from £6,000 to £10,000, depending on system size, panel efficiency, and installer. However, with the current 0% VAT rate on domestic solar installations in Great Britain until March 2027, the upfront cost is more attractive.

Savings vary widely based on your energy consumption, system size, and how much electricity you self-consume. Homeowners can typically save between £300 and £800 annually on their electricity bills, with some sources suggesting up to £1,567 per year. The payback period - the time it takes for your savings and earnings to offset the installation cost - generally ranges from 7 to 15 years in the UK. This can be shortened with efficient usage and a good export tariff1.

The Smart Export Guarantee (SEG) and battery storage

The Smart Export Guarantee (SEG) is a government-backed scheme that requires larger energy suppliers to pay small-scale low-carbon generators for the electricity they export to the grid. SEG rates vary significantly between providers, from as little as 1p per kWh to over 20p per kWh. Shopping around for the best SEG tariff is crucial to maximise your earnings. Learn more about SEG here.

Adding battery storage to your solar setup can dramatically improve your financial returns. Instead of exporting surplus electricity at a lower SEG rate, a battery allows you to store it and use it later, for example, during the evening when grid electricity is more expensive. This increases your self-consumption and reduces your reliance on the grid, further lowering your average monthly electric bill with solar panels UK.

What to expect on your monthly electric bill with solar

Your monthly electricity bill will look different once you have solar panels installed. It will reflect your reduced grid imports and any export earnings, providing a clearer picture of your energy independence.

Understanding your Fuse Energy bill with solar panels

At Fuse Energy, we believe in transparent billing, which is essential for homeowners with solar panels to truly understand their energy usage and savings. Fuse Energy offers home solar installation, supplies your energy, and provides clear billing, including an export tariff. Our statements provide the data necessary to track the impact of your solar generation.

Your Fuse Energy bill clearly itemises your grid electricity usage (kWh), your unit rate, and your daily standing charge. With solar panels, you'll observe a significant reduction in your usage (kWh) because you're drawing less power from the grid.

Any electricity you export to the grid and are paid for via an SEG tariff from your chosen SEG licensee will typically appear as a separate payment or credit from that licensee, rather than directly on your Fuse Energy supply bill. However, by comparing your pre-solar Fuse Energy bills with your post-solar bills, you'll see a tangible difference in your overall expenditure on grid electricity, thanks to your solar generation. Our detailed billing helps you monitor and understand your energy costs, allowing you to quantify the benefits of your solar investment.

Managing your energy bills should be clear and easy to understand. Fuse Energy focuses on straightforward pricing, so you can see exactly what you're paying without unnecessary complexity. If you have a smart meter, you can view detailed usage data through the app or website, helping you understand how you can lower your bills. Our 24/7 human support team is always on hand with fast response times of under 5 minutes whenever you need help. Switching takes as little as 3 minutes, so you can take control of your bills from day one. Click here to switch to Fuse Energy today and start saving. Find out about our mission by clicking here.

References

1. GOV.UK. VAT on energy-saving materials and heating equipment (Notice 708/6)