How to Set Up a Home Solar and Battery System in the UK: A Complete 2026 Guide

With UK electricity prices remaining stubbornly high and the cost of solar panels and home battery storage continuing to fall, 2026 is arguably the best year yet to invest in a home solar and battery system. A well-sized system can cut your electricity bills by 50–80%, protect you from future price rises, and even earn you money through the Smart Export Guarantee (SEG). This guide walks you through every step — from assessing your home's suitability to choosing the right equipment, navigating UK regulations, and getting the most from your system once it's installed.

Step 1: Assess Your Home's Suitability

Before spending a penny, it's worth checking whether your home is a good candidate for solar. The key factors are:

Roof Orientation and Pitch

South-facing roofs at a pitch of 30–40 degrees generate the most electricity in the UK. South-east and south-west orientations are also viable, typically producing around 85–90% of the output of a true south-facing roof. East- and west-facing roofs can still work, particularly if you're pairing solar with a battery — you'll generate less peak power but can still cover a meaningful portion of your consumption. North-facing roofs are generally not suitable for solar PV in the UK.

Roof Space and Condition

A standard residential solar panel measures roughly 1.7m × 1.0m. A typical 4 kWp system (around 10 panels) requires approximately 17–20 square metres of unshaded roof space. Before installation, your installer will assess the roof's structural integrity — most UK roofs can support solar panels without modification, but older properties may need a structural survey. If your roof is due for replacement within the next 10 years, it's worth re-roofing first to avoid the cost of removing and reinstalling panels later.

Shading

Shading from chimneys, trees, neighbouring buildings, or dormer windows significantly reduces output. Modern microinverters and DC optimisers (such as those from SolarEdge or Enphase) can mitigate the impact of partial shading by optimising each panel individually, but heavy shading will still reduce the viability of the system. A reputable installer will carry out a shading analysis as part of their survey.

Planning Permission

In most cases, solar panels on a domestic roof in England, Scotland, and Wales are covered by permitted development rights — meaning you don't need planning permission. Exceptions include listed buildings, properties in conservation areas, and some flats. Always check with your local planning authority if you're unsure. In Northern Ireland, separate planning rules apply.

Step 2: Understand the UK Regulatory Framework

Installing solar and battery storage in the UK involves several regulatory requirements. Understanding these upfront will save you time and ensure your system is compliant.

MCS Certification

The Microgeneration Certification Scheme (MCS) is the UK's quality standard for small-scale renewable energy installations. To be eligible for the Smart Export Guarantee (SEG) — the scheme that pays you for electricity you export to the grid — your installation must be carried out by an MCS-certified installer using MCS-certified equipment. Always verify your installer's MCS certification before signing a contract. You can check the MCS installer database at the MCS website.

DNO Notification: G98 and G99

Your Distribution Network Operator (DNO) — the company that manages the electricity network in your area — must be notified before your system is connected to the grid. For systems up to 3.68 kW per phase (the vast majority of domestic installations), this is handled under G98, which allows your installer to notify the DNO after installation. Larger systems (above 3.68 kW per phase) require prior approval under G99, which can take several weeks. Your MCS-certified installer will handle this process on your behalf.

Building Regulations

Solar PV installations are notifiable under Part P of the Building Regulations (electrical safety). Again, your MCS-certified installer will handle this notification as part of the installation process.

0% VAT on Solar and Battery Storage

As of February 2024, the UK government extended the 0% VAT rate on the installation of solar panels, battery storage systems, heat pumps, and other energy-saving materials to all domestic properties, with no age or income restrictions. This represents a significant saving — previously, VAT was charged at 5% or 20% depending on circumstances. Ensure your installer's quote reflects the 0% VAT rate.

Step 3: Size Your System

Getting the system size right is crucial. Too small and you'll miss out on savings; too large and you'll be exporting cheap electricity you've paid to generate.

Solar Panel Array Size

The average UK household uses around 2,700–3,100 kWh of electricity per year. A 4 kWp solar system in the UK will generate approximately 3,400–3,800 kWh per year in a good location, which is broadly matched to average consumption. However, without a battery, you'll only be able to use the electricity generated during daylight hours — typically 20–30% of total generation for a household that's out during the day.

Common system sizes for UK homes:

• 3 kWp (7–8 panels): Suitable for smaller homes or those with limited roof space. Generates approximately 2,500–2,800 kWh/year. Cost: approximately £5,000–£6,500 installed (as of October 2026, prices subject to change).
• 4 kWp (10 panels): The most popular size for a typical 3–4 bedroom home. Generates approximately 3,400–3,800 kWh/year. Cost: approximately £6,000–£8,000 installed (as of October 2026, prices subject to change).
• 6 kWp (14–15 panels): Suitable for larger homes, EV owners, or those with higher consumption. Generates approximately 5,000–5,700 kWh/year. Cost: approximately £8,000–£11,000 installed (as of October 2026, prices subject to change).

Battery Storage Size

A home battery stores surplus solar generation for use in the evening and overnight. The right battery size depends on your daily consumption pattern and solar array size. As a rule of thumb:

• A 5 kWh battery covers evening usage for a typical household on a summer day.
• A 10 kWh battery provides meaningful coverage through the night and into the following morning.
• A 15–20 kWh battery (or multiple units) is suited to larger homes, EV charging, or those seeking whole-home backup capability.

Battery costs (as of October 2026, prices subject to change) typically range from approximately £2,500–£4,000 for a 5 kWh unit to £5,000–£8,000 for a 10 kWh unit, including installation. Prices vary significantly by brand and installer.

Step 4: Choose Your Equipment

The UK market offers a wide range of solar panels, inverters, and battery systems. Here's an overview of the main options available from UK installers and retailers as of October 2026.

Solar Panels

Panel quality matters for long-term performance. Look for panels with a product warranty of at least 12 years and a performance warranty guaranteeing at least 80% output after 25 years. Reputable brands widely available through UK installers include:

• LG NeON and LG NeON R: High-efficiency monocrystalline panels with strong UK installer support.
• SunPower Maxeon: Among the highest-efficiency panels available, with a 40-year performance warranty.
• Jinko Solar Tiger Neo: A popular mid-range option offering good efficiency at a competitive price point.
• Canadian Solar HiKu: Widely used by UK installers, offering reliable performance and competitive pricing.
• REC Alpha Pure-R: High-efficiency panels with a strong warranty, available through specialist UK installers.

Inverters

The inverter converts DC electricity from your panels into AC electricity for use in your home. The main types are:

• String inverters: The most common and cost-effective option. A single inverter handles all panels. Brands widely available in the UK include SolarEdge, SMA, and Fronius.
• Microinverters: Each panel has its own small inverter, improving performance in shaded conditions. Enphase IQ8 microinverters are the leading option in the UK market.
• Hybrid inverters: Combine solar inverter and battery inverter in one unit, simplifying installation when adding battery storage. Popular options in the UK include SolarEdge Home Hub, Fox ESS H3, SolaX X1-Hybrid, and Sunsynk Hybrid Inverter.

Battery Storage Systems

The UK home battery market has matured significantly. Key options available through UK installers as of October 2026 include:

• Tesla Powerwall 3: The latest generation of Tesla's home battery, offering 13.5 kWh of usable capacity with an integrated solar inverter. Available through Tesla-certified installers in the UK. Approximate installed cost: £10,000–£13,000 (as of October 2026, subject to change). Widely regarded as a premium, polished product with strong app integration.
• Fox ESS ECS2900-H3: A popular choice among UK installers, offering modular capacity from 5.12 kWh upwards. Fox ESS has strong UK installer support and competitive pricing. Approximate installed cost for a 10 kWh system: £6,000–£8,500 (as of October 2026, subject to change).
• SolaX Triple Power T-BAT H 5.8: A modular lithium iron phosphate (LFP) battery available through SolaX-certified UK installers. Capacity can be expanded by adding additional modules. Approximate installed cost for a 5.8 kWh unit: £3,500–£5,000 (as of October 2026, subject to change).
• Sunsynk Powerlynk 5.32 kWh: A lithium iron phosphate battery designed to work with Sunsynk hybrid inverters. Popular with UK installers for its competitive pricing and modular design. Approximate installed cost: £3,000–£4,500 per 5.32 kWh module (as of October 2026, subject to change).
• Puredrive Energy PureStorage 2: A UK-designed and UK-supported battery system offering 5.2 kWh or 10.4 kWh configurations. Puredrive has a strong reputation for UK customer support. Approximate installed cost for 5.2 kWh: £3,500–£5,000 (as of October 2026, subject to change).
• Duracell Energy Home Battery: Duracell's entry into the UK home battery market, offering 5 kWh and 10 kWh configurations. Available through approved UK installers. Approximate installed cost for 5 kWh: £3,000–£4,500 (as of October 2026, subject to change).
• Pylontech Force H2: A modular LFP battery widely used in UK installations, particularly popular for its competitive pricing and compatibility with a wide range of hybrid inverters. Approximate installed cost for a 7.1 kWh system: £4,000–£6,000 (as of October 2026, subject to change).

Step 5: Get Quotes and Choose an Installer

Getting multiple quotes is essential — prices for the same system can vary by 20–30% between installers. Here's how to approach the process:

Finding MCS-Certified Installers

Use the MCS installer database to find certified installers in your area. You can also use comparison services such as those offered by Which? Trusted Traders, Checkatrade, or specialist solar comparison platforms. Aim to get at least three quotes.

What to Look for in a Quote

• MCS certification number for both the installer and the equipment
• Detailed breakdown of equipment (panel brand and model, inverter brand and model, battery brand and model)
• Projected annual generation in kWh (based on your specific roof orientation and location)
• Estimated self-consumption percentage and annual bill savings
• Confirmation that DNO notification and building regulations notification are included
• Warranty terms for panels, inverter, and battery
• Aftercare and monitoring support

Red Flags to Avoid

• Installers who cannot provide an MCS certificate number
• Quotes that seem unusually cheap — quality installation has a cost
• High-pressure sales tactics or very short quote validity windows
• Vague equipment specifications ("premium panels" without brand or model)

Step 6: The Installation Process

Once you've chosen an installer and signed a contract, the installation process typically follows these stages:

Pre-Installation Survey

Your installer will carry out a detailed survey of your property, including roof measurements, structural assessment, shading analysis, and a review of your existing electrical installation. This usually takes 1–2 hours.

DNO Notification

For G98 systems (up to 3.68 kW per phase), your installer notifies the DNO after installation. For G99 systems, prior approval is required — your installer will submit the application and manage the process, but allow 4–8 weeks for approval.

Installation Day

A typical 4 kWp solar + battery installation takes 1–2 days. The process involves:

1. Fitting roof mounting rails and brackets
2. Installing solar panels on the mounting system
3. Running DC cabling from panels to the inverter location (usually in the loft or garage)
4. Installing the inverter and battery system
5. Connecting to your consumer unit (fuse board)
6. Installing a generation meter and export meter (if required)
7. Commissioning and testing the system
8. Setting up the monitoring app

MCS Certificate and Handover

After installation, your installer will provide an MCS certificate — keep this safe, as you'll need it to apply for the Smart Export Guarantee. They should also walk you through the monitoring system and explain how to get the most from your installation.

Step 7: Apply for the Smart Export Guarantee (SEG)

The Smart Export Guarantee (SEG) is a UK government scheme that requires licensed electricity suppliers with more than 150,000 customers to offer a tariff for electricity exported to the grid from small-scale renewable installations. To be eligible:

• Your system must be MCS-certified
• Your system must be 5 MW or less (all domestic systems qualify)
• You must have a smart meter installed (your supplier can arrange this)

SEG rates vary by supplier and tariff. As of October 2026, rates from major UK suppliers range from approximately 3p to 15p per kWh exported, with some time-of-use export tariffs paying higher rates during peak demand periods. Compare SEG tariffs from suppliers including Octopus Energy, E.ON Next, British Gas, EDF, and others before choosing. You are not required to use the same supplier for import and export.

Step 8: Maximise Your Savings with Smart Tariffs

Pairing solar and battery storage with a smart electricity tariff can significantly increase your savings. The key options in the UK as of October 2026 include:

Octopus Agile

Octopus Agile is a half-hourly variable tariff that tracks wholesale electricity prices. During periods of high renewable generation (often overnight or on windy days), prices can drop to near zero or even go negative — meaning you're paid to use electricity. With a home battery, you can charge overnight at very low rates and discharge during expensive peak periods.

Octopus Go

Octopus Go offers a fixed cheap overnight rate (typically around 7–9p/kWh between midnight and 5am, as of October 2026, subject to change) for EV charging and battery charging. This is simpler to manage than Agile and well-suited to households with an EV or large battery.

Intelligent Octopus

Designed for EV owners, Intelligent Octopus integrates with compatible EV chargers and vehicles to automatically schedule charging during the cheapest periods. It can also work with compatible home batteries.

Load Shifting Strategy

The optimal strategy for a solar + battery household is:

1. Charge the battery from solar during the day
2. If the battery isn't full by late afternoon, top it up from the grid at cheap overnight rates
3. Discharge the battery during peak evening hours (typically 4pm–8pm) when grid electricity is most expensive
4. Export any surplus solar to the grid via your SEG tariff

Most modern hybrid inverters and battery systems (including Tesla Powerwall 3, Fox ESS, SolaX, and Sunsynk) have built-in smart scheduling features that can automate this process, often integrating directly with Octopus tariffs via API.

Step 9: Monitor and Maintain Your System

Monitoring

All modern solar and battery systems come with a monitoring app that shows real-time generation, consumption, battery state of charge, and export. Popular monitoring platforms include:

• Tesla app: For Powerwall 3 systems
• Fox ESS app: For Fox ESS systems
• SolarEdge app: For SolarEdge inverter systems
• Enphase Enlighten: For Enphase microinverter systems
• SolaX app: For SolaX hybrid systems

Check your monitoring app regularly, particularly in the first few months, to ensure the system is performing as expected. A significant drop in generation compared to the installer's projections may indicate a fault or shading issue.

Maintenance

Solar panels require minimal maintenance. In the UK's climate, rainfall generally keeps panels clean enough for good performance. However, if you notice a significant drop in output, it may be worth having the panels professionally cleaned — particularly if you live in a dusty area or near trees. Most installers recommend a professional inspection every 3–5 years to check mounting fixings, cabling, and inverter performance.

Typical Payback Periods and ROI

Payback periods for UK solar + battery systems vary depending on system size, energy consumption, tariff, and location. As a general guide (as of October 2026, based on current energy prices and SEG rates, subject to change):

All prices and savings estimates are as of October 2026 and are subject to change. Actual savings will vary based on your specific consumption, tariff, location, and system performance. These figures are indicative only — your installer should provide a detailed financial projection based on your specific circumstances.

Summary: Key Steps to Setting Up a Home Solar and Battery System in the UK

1. Assess your home: Check roof orientation, pitch, space, and shading. Confirm planning permission isn't required.
2. Understand the regulations: MCS certification, G98/G99 DNO notification, Building Regulations Part P, and 0% VAT.
3. Size your system: Match solar array size to your consumption; choose battery capacity based on your evening and overnight usage.
4. Choose your equipment: Select MCS-certified panels, inverter, and battery from reputable brands available through UK installers.
5. Get multiple quotes: Aim for at least three quotes from MCS-certified installers. Check MCS certification numbers.
6. Manage the installation: Your installer handles DNO notification, Building Regulations, and commissioning.
7. Apply for SEG: Register with a licensed supplier to earn money for electricity you export.
8. Optimise with smart tariffs: Consider Octopus Agile, Octopus Go, or similar time-of-use tariffs to maximise savings.
9. Monitor and maintain: Use your system's app to track performance and arrange periodic professional inspections.

A home solar and battery system is one of the most impactful investments a UK homeowner can make in 2026 — both financially and environmentally. With the right system, the right installer, and the right tariff, it's entirely realistic to cut your electricity bills by half or more while future-proofing your home against energy price volatility.