With over 1.5 million UK homes now running solar panels, it’s a question we get asked almost daily: are they actually worth the money? The short answer for most Sussex homeowners is yes — but the real answer depends on your property, your energy usage, and how long you plan to stay in your home.
Here’s an honest breakdown of the costs, savings, and things to consider before committing.
How Do Solar Panels Work?
Solar panels — technically called photovoltaics or PV — convert sunlight into electricity. When sunlight hits the panels, it energises electrons inside the cells, creating an electric current. That electricity flows into your home to power whatever you need, from lights and appliances to your EV charger.
Any electricity you generate but don’t use can be exported back to the grid, and you get paid for it. More on that below.
What Does a Solar Panel System Cost?
A typical residential system in the UK costs around £6,000–£7,000 installed, depending on system size, panel choice and property type. Larger systems or those requiring additional scaffolding or roof work will cost more.
It’s a significant upfront investment, which is why it’s important to understand the payback before going ahead. We’d never recommend borrowing to fund solar panels unless the finance is interest-free — loan interest can erode your savings and extend your break-even point considerably.
How Much Can You Save?
Savings depend on three main factors: how much electricity you use, when you use it, and how much sunlight your property receives.
Sussex is one of the best locations in the UK for solar generation. We get around 1,900 hours of sunshine per year, well above the national average, which means panels here perform better than in most parts of the country.
Based on current electricity prices, a typical 3.5–4kW system in Sussex can save between £300 and £800 per year on electricity bills. The wide range comes down to how much of your generated electricity you actually use yourself versus how much you export.
The golden rule: use as much of your solar electricity as you can during daylight hours. Run your washing machine, dishwasher, and charge your EV while the sun is up. Every unit you use yourself saves you the full retail rate (currently around 25–28p/kWh), whereas exporting earns you significantly less.
Getting Paid for What You Don’t Use
The Smart Export Guarantee (SEG) pays you for every unit of electricity you generate and export back to the grid. Rates vary enormously between providers — anywhere from 1p to 25p per kWh — so it’s worth shopping around for the best export tariff.
To qualify for SEG payments, you need two things: a working smart meter so your exports can be measured, and an MCS-certified installation carried out by an MCS-certified installer. All of our installations at Greener Solar Solutions are MCS certified as standard.
How Long Until You Break Even?
For most Sussex homeowners, the break-even point is roughly 8–11 years. That might sound like a long time, but consider that solar panels typically last 25–30 years with minimal maintenance. Once you’ve recouped your investment, everything after that is essentially free electricity.
Your break-even timeline depends on where you sit in these ranges:
- Faster payback if you’re home during the day and can use most of your generated electricity, if you have a south-facing roof with minimal shading, or if you combine solar with battery storage to maximise self-consumption.
- Slower payback if you’re out during the day and export most of your generation, if your roof faces east or west (still viable, just slightly lower output), or if you’re on a particularly cheap electricity tariff already.
Is Your Home Suitable?
Not every property is ideal for solar, so it’s worth understanding what makes a good candidate.
Roof orientation matters, but less than it used to. South-facing roofs will generate the most electricity, but modern panels perform well on east and west-facing roofs too. North-facing roofs are generally the only orientation we’d advise against.
Shading is the biggest enemy. Trees, chimneys, neighbouring buildings — anything that casts shadow on your panels between roughly 10am and 4pm will reduce output. We assess shading carefully during every site survey.
You need enough roof space. Each panel takes up roughly 2 square metres. A typical 4kW system needs around 8–10 panels, so you’ll need at least 16–20 square metres of usable roof.
Your roof needs to be in reasonable condition. If your roof needs replacing or repairing in the next few years, it makes sense to do that first. Removing and reinstalling panels later adds unnecessary cost.
Planning permission usually isn’t needed. Most residential solar installations in England and Wales fall under permitted development, so no planning application is required. The exceptions are listed buildings and properties in conservation areas — if that applies to you, we’ll advise during your survey.
Should You Add Battery Storage?
Battery storage lets you store surplus solar electricity for use in the evening or overnight, rather than exporting it at a lower rate. This can significantly increase the proportion of solar energy you use yourself, which is where the real savings come from.
A home battery typically costs £3,500–£5,500, so it does extend your initial investment and payback period. However, for households that are out during the day and use most of their electricity in the evening, a battery can make the overall system much more cost-effective.
You don’t have to install a battery from day one. We design all our solar PV systems to be battery-ready, so you can add storage later when it makes sense for your budget.
What About Maintenance?
Solar panels are remarkably low-maintenance. There are no moving parts, and in the UK we get enough rain to keep panels reasonably clean without manual intervention. We recommend keeping nearby trees trimmed to avoid shading, and an occasional visual check to make sure everything looks normal.
The one component you should expect to replace is the inverter — the device that converts the DC electricity from your panels into AC electricity your home can use. Inverters typically last 10–15 years, and replacement costs around £800–£1,000.
Most panel manufacturers offer 25-year performance warranties, and our installation workmanship is covered by its own guarantee. If panels are damaged by storms or other events, they’re usually covered under your buildings insurance — though it’s worth confirming this with your insurer before installation.
What If You’re Planning to Move?
If you’re likely to sell your home within the next 8–10 years, the financial case for solar panels is weaker, since you may not reach your break-even point before moving.
That said, solar panels can add value to your property. Recent research suggests homes with solar can sell for up to 2% more, and some estimates put it higher. The reality is that as energy costs remain high and buyers become more energy-conscious, solar panels are increasingly seen as a genuine asset rather than a cosmetic addition.
What we wouldn’t recommend is removing panels from one home and reinstalling them on another. The systems are designed for your specific roof, and MCS certification doesn’t transfer to a reinstalled system, which means you’d lose your eligibility for SEG payments.
Watch Out for Scams
Unfortunately, the popularity of solar has attracted its share of scam operators. Be wary of unsolicited emails or social media ads offering unusually cheap installations or free maintenance checks. Always check that your installer is MCS certified, and get at least three written quotes before committing.
Is It Worth It? Our Honest View
For most Sussex homeowners with a suitable roof and reasonable energy usage, solar panels are a sound long-term investment. The combination of bill savings, export income, and rising property values means the numbers stack up well — especially given that electricity prices show no sign of coming back down to pre-2022 levels.
The key is to go in with realistic expectations. Solar panels aren’t a get-rich-quick scheme. They’re a long-term investment that pays back steadily over many years, and once they do, you’ll be generating free electricity for a decade or more beyond that.
If you’re not sure whether solar is right for your home, we’re happy to talk it through honestly. We’d rather tell you it’s not the right fit than sell you a system that won’t deliver.
Get a Free Assessment
If you live in East Sussex, or West Sussex, Book a free, no-obligation site survey and we’ll assess your roof, estimate your generation potential, and give you a clear picture of costs, savings and payback for your specific property.
Greener Solar Solutions is the dedicated solar energy brand of A Greener Alternative. We’re MCS certified, NICEIC approved, and every installation is carried out by our own directly employed electricians across Sussex, Surrey, Hampshire and Kent.
