Plug-in solar panels explained

Plug-in solar panels offer UK homeowners a straightforward way to generate their own electricity, reduce energy bills, and increase energy independence. These small, self-installed systems connect directly to a standard wall socket, making solar power more accessible than ever before. Since 27 August 2026, compliant plug-in solar systems have been legal in the UK, operating under specific regulations that permit an alternating current (AC) export limit of 800W per property.

Jules by Fuse is Fuse's plug-in home battery, with optional Anywhere Solar panels. Reservations are open now for customers in Great Britain.

What are plug-in solar panels?

Plug-in solar panels are compact solar energy systems designed for easy, self-installation by homeowners. Unlike traditional rooftop solar arrays, these systems don't require complex wiring or professional installation, making them a popular choice for those seeking a more accessible entry into solar power.

How they work

A plug-in solar system generates direct current (DC) electricity from sunlight, which is then converted into AC by a microinverter. This AC electricity is fed directly into your home's electrical circuits via a standard wall socket. The electricity produced offsets your home's base-load consumption - the constant background power draw from appliances like refrigerators or routers. By meeting some of your electricity demand directly, the system reduces the amount of power you draw from the National Grid, leading to lower energy bills. The built-in controls manage voltage, frequency, and output, and crucially, stop feeding power into the grid during a power cut for safety.

Key components of a plug-in system

A typical plug-in solar system primarily consists of two main parts:

• Solar panel(s): These capture sunlight and convert it into DC electricity. They are designed to be relatively lightweight and can be mounted in various outdoor spaces, such as balconies, gardens, or patios.
• Microinverter: This device is connected directly to the solar panel(s) and converts the DC electricity into AC electricity, synchronising it with your home's existing supply and the National Grid.

The UK legal landscape for plug-in solar

The legal framework for plug-in solar panels in the UK has recently undergone significant changes, making it easier for homeowners to adopt this technology.

SI 2026/848 explained: the 800W limit and more

The key legislative change came with Statutory Instrument 2026/848, which legalised compliant plug-in solar in Great Britain from 27 August 2026. This amendment to the Plugs and Sockets etc. (Safety) Regulations 1994 (PSSR) introduced a narrow exemption, allowing devices meeting the Interim Product Specification (IPS) to connect via a standard BS 1363 plug.

The legislation sets clear limits:

• AC export limit: The maximum AC output is capped at 800W per device. While the panels themselves can have a combined DC input of up to 2,000W, the inverter's output to the grid must not exceed 800W.
• Units per property: Currently, only one compliant plug-in solar unit is permitted per property.
• Compliance: Systems must be listed on the Energy Networks Association (ENA) Type Test Register and come as a complete, compliant kit, including the panels, inverter, manufacturer-supplied cables, and an approved factory-fitted plug.

It is important to note that SI 2026/848 specifically covers standalone plug-in solar devices. It does not extend to plug-in batteries, hybrid solar and battery systems, or other microgeneration technologies like small wind turbines.

Grid notification: G98 requirements and your DNO

Even with the legalisation of plug-in solar, a mandatory step for all installations is notifying your Distribution Network Operator (DNO) under G98 regulations. This notification must be completed within 28 days of installation.

The G98 notification is a "connect and notify" process, meaning you do not need DNO approval before installing a compliant kit. The notification can be completed by the consumer or their supplier. For plug-in solar under 800W, it's a notification, not a request for approval, and the DNO cannot refuse a compliant installation. You can find your DNO using the ENA's online tool.

Benefits for UK homeowners

Plug-in solar panels offer several compelling advantages for UK homeowners looking to take control of their energy consumption.

Reducing your energy bills

The primary benefit of plug-in solar is its ability to reduce your electricity bills. By generating your own power, you offset the electricity you would otherwise buy from the grid. This is particularly impactful when considering the current electricity unit rates. For Direct Debit customers on the Ofgem Price-Cap default tariff, the electricity unit rate for 1 July to 30 September 2026 is 26.11p per kWh1. Every unit of electricity your plug-in solar system produces and you consume instantly means one less unit purchased at this rate.

Boosting energy independence

Generating your own electricity provides a tangible step towards greater energy independence. It reduces your reliance on external energy suppliers and the fluctuations of the wholesale energy market. This sense of control can be empowering, allowing you to participate actively in your home's energy supply.

Accessibility and simplicity of installation

Plug-in solar systems are designed for ease of use. Their self-installed nature means you typically won't need to hire electricians or undertake complex structural changes to your property. This accessibility makes solar power an option for a wider range of homeowners, including those in flats or rented properties with suitable outdoor space.

Practical considerations before you buy

Before investing in a plug-in solar system, it's wise to consider a few practical aspects to ensure it's the right fit for your home and lifestyle.

Placement, orientation, and shading

For optimal performance, your plug-in solar panels need direct sunlight for as much of the day as possible. Consider the best placement on your property, whether it's a balcony, garden, or patio, and assess any potential shading from trees, buildings, or other obstructions. South-facing orientations are generally ideal in the UK, but east or west-facing panels can still generate significant power.

Self-consumption versus export: maximising your savings

The most significant savings from plug-in solar come from self-consumption - using the electricity generated by your panels at the exact moment it's produced. Any surplus electricity not immediately used by your home will be exported to the grid.

It's crucial to understand that plug-in solar panels, being self-installed and typically lacking Microgeneration Certification Scheme (MCS) certification, do not qualify for the Smart Export Guarantee (SEG) . However, this does not mean exported surplus goes unpaid. Some energy suppliers may offer their own export tariffs outside the SEG scheme. Maximising self-consumption, by using high-demand appliances during daylight hours, remains the most effective way to save.

Suitability for different UK home types

Plug-in solar panels are particularly well-suited for various UK home types:

• Flats and apartments: With suitable balcony space, renters and flat-dwellers can now access solar power, which was previously difficult.
• Terraced houses: Small gardens or wall spaces can accommodate these compact systems.
• Homes with limited roof access: For properties where traditional rooftop solar isn't feasible, plug-in options provide an alternative.

While government safety testing did not find UK ring circuits or standard domestic wiring unsafe for plug-in solar, if you have concerns about your property's electrical system, it is always advisable to consult a qualified electrician.

How much can plug-in solar save you?

Understanding the potential savings from plug-in solar involves a few key factors, and while exact figures vary, we can illustrate the potential impact.

Understanding the savings calculation

Your savings are primarily determined by:

1. Generation: The amount of AC electricity your system produces annually, which depends on factors like panel orientation, shading, and local weather conditions.
2. Self-consumption share: The percentage of generated electricity that you use directly in your home. This is the most critical factor for savings, as it directly reduces the amount you buy from your supplier.
3. Electricity unit rate: The cost per kilowatt-hour (kWh) you avoid paying by using your own generated electricity. As of 1 July to 30 September 2026, the Ofgem Price Cap for electricity is 26.11p per kWh for Direct Debit customers.

Illustrative savings scenarios for UK households

The average UK home uses around 2,500 kWh of electricity per year, according to Ofgem's medium Typical Domestic Consumption Value (TDCV) effective from 1 July 20262. Plug-in solar systems are designed to offset a portion of this, particularly your base-load.

Consider these illustrative scenarios, focusing on how self-consumption impacts savings:

• High self-consumption: A household that uses a large proportion of its electricity during daylight hours, perhaps with someone working from home or running appliances while the sun is shining. This maximises the direct use of generated solar power, leading to the highest potential savings.
• Medium self-consumption: A household with some daytime electricity use, but also significant consumption in the evenings. Savings will still be notable, but less than those with high daytime usage.
• Lower self-consumption: A household where most electricity use occurs outside of daylight hours. While still beneficial, the savings will be lower as more generated electricity is exported to the grid rather than directly consumed.

These scenarios highlight the importance of self-consumption. The more of your generated electricity you use, the more you save.

Making the most of your plug-in solar

To maximise the benefits of your plug-in solar system, focus on optimising how and when you use electricity.

Tips for maximising self-consumption

• Shift appliance use: Run dishwashers, washing machines, and tumble dryers during peak sunlight hours when your panels are generating the most electricity.
• Use timers: If your appliances have timers, program them to operate during the middle of the day.
• Monitor energy use: Smart plugs and energy monitoring apps can help you understand your real-time consumption and generation, allowing you to make informed decisions about when to use energy.
• Consider smart appliances: Some modern appliances can be programmed or even automatically activated based on energy generation.

Future-proofing your plug-in solar setup

While SI 2026/848 does not currently cover plug-in batteries or hybrid solar-battery kits, these technologies are evolving. A plug-in battery would allow you to store surplus solar power generated during the day for use in the evening, further increasing your self-consumption and savings. Keep an eye on future legislative developments that may expand the scope of compliant plug-in systems.

Launch is currently estimated for 2027 and depends on the UK position on plug-in home batteries. If you reserve Jules, Fuse will contact you at launch so you can place your order.