Balcony Solar Panels: Cost, Setup & Value
No roof? No problem. Balcony solar panels gives you a simple yet powerful way to produce their own electricity—even from a small flat. It's the smart alternative to traditional solar setups, without the hassle or hefty installation costs. Learn how these panels are changing the way we think about energy in compact urban environments.
What Exactly Are Balcony Solar Panels?
Balcony solar panels are compact photovoltaic (PV) systems specifically designed for installation on apartment balconies or railings. They're ideal for urban residents who don't have access to a roof or a garden, allowing them to produce their own electricity within a small footprint.
Unlike traditional solar setups, balcony systems typically consist of 1–4 panels mounted on a frame or attached directly to the balcony rails. These panels can be connected via micro-inverters or plug-in devices that feed directly into your home's electrical socket, called plug-and-play systems. This simple setup enables users to offset their daytime energy usage without complex installations or permissions.
How Much Do Balcony Solar Panels Cost in the UK?
The cost of balcony solar panels can vary depending on system size, whether a battery is included, and whether installation is DIY or professional.
Plug-In Balcony Solar Panels
A simple and affordable way to start generating your own electricity without professional help.
Price Range: £100–£600
Power Output: 300–600W
Installation: DIY (plug directly into a wall socket)
Ideal For: Renters, beginners, and those wanting low-maintenance solar power
Notes: Lightweight, portable, and easy to remove or relocate
Plug-In Panels with Battery Storage
These systems include a solar battery to store energy for use after sunset.
Price Range: £300–£1,200
Power Output: 300–600W (plus 300–1,000Wh storage)
Installation: DIY with plug-in inverter and battery connection
Ideal For: Users who want to extend solar usage into the evening
Notes: Higher upfront cost but offers more energy control and stability
Professionally Installed Balcony Systems
For long-term, grid-integrated solutions that tie into your home's electrical system.
Price Range: ~£1500 (for 2×400W panels)
Power Output: 800W
Installation: Professional (wired into the household grid)
Ideal For: Homeowners with approval to modify electrical systems
Notes: Must comply with UK G98 grid connection standards; may need landlord consent
What Savings Can You Expect from Balcony Solar Panels?
Under optimal conditions, a 400-watt solar panel can generate approximately 1.6 to 2.4 kilowatt-hours (kWh) of electricity per day. This equates to an annual output ranging from 584 to 876 kWh.
The average electricity cost in the UK is 25.73 pence per kWh, according to Ofgem's price cap effective from 1 July 2025.
Based on the generation capacity of a 400W panel and the current electricity rates, the estimated annual savings are as follows:
Daily Output (kWh) | Annual Output (kWh) | Estimated Savings (£) |
1.6 | 584 | £150.33 |
2 | 730 | £188.83 |
2.4 | 876 | £226.94 |
Calculations: Annual Output × £0.2573 (cost per kWh)
By integrating a 400W solar panel for balcony, UK residents can potentially reduce their annual electricity bills by approximately £150 to £227, depending on various factors such as location, panel orientation, and local weather conditions.
For those looking to further maximize their savings, the EcoFlow STREAM Series Solar Plant offers an efficient solution. By integrating solar power with energy storage, the STREAM Series helps you make the most of your generated electricity and minimize reliance on the grid. With storage capacities ranging from 1.92kWh to 11.52kWh, the system stores excess energy during the day for use at night or during cloudy periods, reducing electricity costs even further. Its intelligent energy management system ensures that you use solar energy when it’s most cost-effective, making it an excellent option for UK households seeking to lower their energy bills in the long run. Depending on your usage and system size, you could see significant savings, contributing to a more sustainable and cost-efficient home energy solution.
EcoFlow STREAM Series Solar Plant
What Are the Pros and Cons of Balcony Solar Panels?
A Balcony solar system brings multiple benefits but also comes with a few limitations. Here's a balanced overview:
Pros:
Ideal for renters and flat dwellers – No need for roof access.
Simple plug-and-play installation – No complex wiring or installers required.
Reduces electricity bills – Use solar power during peak hours.
Portable – Easy to relocate or remove if moving.
Affordable entry point – Lower upfront cost than roof solar.
Environmentally friendly – Supports clean energy transition.
Cons:
Limited output – Can't fully power a household.
Dependent on balcony orientation – South-facing is best.
May require landlord/leaseholder approval – Especially for listed buildings or strict lease terms.
Weather sensitivity – UK's cloudy weather can reduce efficiency.
Aesthetic concerns – Some panels may be considered unsightly by neighbours or building managers.
How Do You Install Balcony Solar Panels?
Installing balcony solar panels in the UK is typically straightforward, especially with pre-assembled kits. Here's a step-by-step breakdown:
Check Balcony Orientation: South-facing balconies receive the most sun. East or west-facing may work, but with lower efficiency.
Confirm Building Permissions: Always check with your landlord or building management, particularly in conservation areas or shared buildings.
Choose the Right Kit: Opt for UK-compliant systems under 800W, ideally with CE certification and a G98 plug-and-play inverter.
Install Mounting Brackets: Attach brackets securely to railings using adjustable clamps. Ensure they don't damage the structure or protrude dangerously.
Secure the Panels: Mount panels at an angle (around 30–45 degrees) for optimal sun capture. Adjustable mounts are helpful for seasonal changes.
Connect the Inverter: Plug the panel cables into the micro-inverter, which in turn connects to a standard UK wall socket. Use weatherproof cables if outdoors.
Test the System: Use a smart meter or the inverter's app to confirm power generation. Monitor daily output to track efficiency.
How To Maintian Balcony Solar Panels?
Balcony solar panels are generally low-maintenance, but regular upkeep is essential for peak performance and long-term durability. Whether you're in a flat in London or a high-rise in Manchester, following these steps will ensure your system runs smoothly year-round.
Clean Regularly: Dust, bird droppings, or grime can block sunlight. Clean panels gently with a soft cloth and soapy water every 3–4 months.
Inspect for Damage: Check for cracks, corrosion, or cable wear—especially after storms or strong winds.
Secure Mountings: Ensure bolts and clamps remain tight. Loose parts can be hazardous in high winds.
Monitor Performance: Use an energy app or smart plug to track daily kWh output. If output drops significantly, troubleshoot immediately.
Protect from Moisture: Ensure the inverter and cables are protected from rain with covers or weatherproof boxes.
Always follow manufacturer guidelines and contact a qualified electrician for any electrical issues or repairs.
Conclusion
Balcony solar panels offer a practical, affordable, and eco-friendly solution for UK residents—especially those in flats or urban environments. They provide a valuable step toward energy independence, helping you reduce electricity bills and support the green transition without needing a full rooftop system. With plug-and-play kits becoming more efficient and affordable, now is an excellent time to consider balcony solar panels for your home. Ready to get started? Explore EcoFlow’s balcony solar solutions designed for modern UK living.
FAQs
Can you put a solar panel on a balcony?
Yes, you can install solar panels on a balcony, provided you have adequate space and sunlight. Make sure your system complies with local safety regulations, and seek permission from your landlord or property manager if you're renting. Most kits are lightweight and non-permanent, making them ideal for urban living.
How much does balcony solar cost?
In the UK, the plug-in balcony solar panel typically costs between £100 and £600, depending on size and features. Additional costs may include mounting brackets, inverters, and accessories. DIY installation can reduce setup costs significantly, and VAT relief may apply for qualifying energy-saving systems.
What is the 120 rule for solar panels?
The 120 rule refers to a regulation in the UK that allows for the installation of small, plug-in solar systems without needing formal planning permission, as long as the system does not exceed 120 watts of power output. This rule applies to systems that are designed for residential use, such as balcony solar panels. If your solar panel setup falls within these parameters, you can usually install it without the need for extensive paperwork or approval, making it an easy and affordable way to reduce energy costs in urban areas. However, it’s always advisable to check with your local council or building management to ensure compliance with specific local regulations.