Unit 2, 1 Annan Business Park, Annan DG12 6TZ
Unit 2, 1 Annan Business Park, Annan DG12 6TZ
If you're thinking about installing solar panels, you've probably got a lot of questions. How do they work? What size do you need? Are they worth it in the UK?
If you're thinking about installing solar panels, you've probably got a lot of questions. How do they work? What size do you need? Are they worth it in the UK? Well, as one of the best local electric and solar companies around, we’re here to clear things up and help you make an informed decision.
Whether you’re looking at flat roof solar panels for a commercial property or a sleek, in-roof system for your home, this guide covers everything - from types of solar panels to the best ways to maximise your investment. Let's break down everything about solar PV panels, so that you can get to work on creating an efficient solar house.
Solar panels work by converting sunlight into electricity through the photovoltaic (PV) effect. When sunlight hits the silicon solar cells inside the panel, it excites electrons, generating direct current (DC) electricity. Since your home uses alternating current (AC), an inverter is needed to convert the electricity into a usable form.
If you generate more electricity than you use, the extra power can either be stored in a battery or exported back to the grid under the Smart Export Guarantee (SEG), meaning you can earn money on what you don’t use. Alternatively, programmes with energy providers like Outgoing Octopus with Octopus Energy, you can export energy back into the grid too and get money in return.
The amount of energy a solar panel system produces depends on several factors, including the PV panel size, number of solar panels, efficiency rates, and location.
In the UK, a typical 4 kWp system generates 3,000 - 3,400 kWh of solar power per year, covering around 60–70% of an average household’s electricity usage.
Seasonal variations play a role: you’ll generate more energy in summer and less in winter because of shorter daylight hours. This is where solar batteries to come in, to help you store energy during winter or dark days.
A single solar PV panel usually produces 250 - 400 watts per hour under ideal conditions, so the more panels you install, the more power you’ll generate! Because of this, each solar house must maximise space, and select the most efficient PV panel size for their solar house. Specialist installation solar companies like DRW will help you to do this.
Three main types of solar panels exist, each with its own pros and cons:
Monocrystalline Panels – The most efficient option (20–22%) and ideal for homes with limited roof space.
Polycrystalline Panels – Slightly less efficient (15–18%) but more affordable.
Thin-Film Panels – Lightweight and flexible, but lower efficiency (10–12%), making them less common for homes.
For most residential and commercial properties, monocrystalline panels offer the best balance of efficiency and durability.
On roof solar panels are the most common type of installation, where panels are mounted onto your existing roof using a metal framework. They’re cost-effective and work well for most properties, but they do sit above your roof tiles, making them more visible. To some, this isn't a problem. However, when designing their solar house, some like to keep the initial integrity of their house, looking for solar panels that blend in.
Instead of sitting on top of your tiles, in-roof systems are integrated into your roof, creating a sleek and modern look. These are great for new builds or roof renovations, but they cost a little more than on-roof systems. A decision of priority exists: price or appearance. This is something that should be budgeted with your solar companies, to figure out which is the best solar system for your home.
Worried about the angle of your roof? We can always work out a way around it for your solar house. If you have a flat roof, flat roof solar panels need to be installed on tilted mounting systems to capture as much sunlight as possible. This is common for commercial buildings but also works for homes with flat roof extensions or garages.
If you’ve got plenty of land, ground-mounted systems are an excellent option. They’re easy to maintain, but you may need planning permission depending on the size and location.
Find out more about planning permissions for your solar panels here.
With the constant increase in energy prices, the long term financial benefit of a solar house is a great incentive. Generating your own electricity means you’ll buy less energy from the grid, saving you £300 - £600 per year, depending on system size and usage. Over the space of 10 - 15 years, your solar panel system will have paid for itself.
Solar panels significantly reduce your home’s carbon footprint, cutting CO₂ emissions by 1.3 to 1.6 tonnes per year - that’s a substantial step toward a greener planet!
AS previously mentioned, thanks to the Smart Export Guarantee (SEG) and other similar programmes such as Outgoing Octopus, you can earn money by selling excess electricity back to the grid. Tariffs vary, but you could get 5–15p per kWh exported.
The cost of installing solar panels depends on several factors, including:
System size – Larger systems cost more but generate more energy.
Roof complexity – Difficult-to-access roofs may require extra work.
Panel type – Monocrystalline panels cost more but offer better efficiency.
Battery storage – Adds to the cost but increases savings in the long run.
Each and every solar set up is unique, tailored to each house. For a better insight to the cost of a solar power setup for your home or commercial building, get in touch with us today.
Solar panels are best optimised when combined with other renewable systems in your solar house. Here are some examples:
Solar Panels & Battery Storage: Solar batteries store excess energy to use during peak times or power outages. A combination of solar PV panels and a leading battery storage system enhances self-sufficiency and maximises solar investment.
Solar Panels & Heat Pumps: Using solar energy to power heat pumps reduces heating costs, and overall energy efficiency for the home.
Solar Panels & Electric Vehicles (EVs): Charging your EV using solar-generated electricity lowers transportation costs, reduces reliance on fossil fuels, and decreases carbon emissions.
Solar Panels, Batteries & Time-of-Use Tariffs: Maximises savings by charging batteries when electricity rates are low.
If you’re looking for a reliable, long-term way to cut your bills and reduce carbon emissions, solar panels are a fantastic investment for your solar home. With plenty of solar companies, like DRW, offering high-quality installations, finding the right system for your home or business has never been easier.
Whether you're considering different types of solar panels, wondering about solar panel size, or looking for the best flat roof solar panels, we hope this guide has answered all your questions. If you're ready to make the switch to solar, now’s the perfect time to get started!
Got more questions? Give in touch, we’re always happy to help! Or head to our FAQs.
You’ll need around 10–16m² of roof space for a standard 3–4 kWp system. Solar panel systems however can be tailored to different sizes, shapes and orientation for the most energy efficient set up.
Shade from trees, chimneys, or buildings can reduce efficiency. Power optimisers or microinverters help in partially shaded areas.
Most residential solar panel installations are covered under permitted development rights, meaning no permission is needed – unless you live in a listed building or conservation area.
Yes! Flat roof solar panels require tilted mounting systems to maximise energy capture.
PV panel size varies depending on shape and brand, but on average:
At DRW Electrical Services, we bring over 25 years of expertise to every project, ensuring top-notch solutions across a wide range of electrical services. From cutting-edge renewable energy systems to comprehensive commercial and domestic electrical installations, our team of specialists is here to meet all your needs.
DRW Electrical Group delivers expert electrical and roofing solutions, tailored to both residential and commercial needs.
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