Solar Battery Retrofit VAT Rules in the UK: 0% Relief Explained

Key Takeaways

• A temporary 0% VAT rate applies to the installation of electrical storage batteries in the UK.
• This relief is in effect from 1 February 2024 and is scheduled to end on 31 March 2027.
• The zero rate covers the installation service, not just buying a battery over the counter.
• To qualify, the installation must be in residential accommodation or a building used solely for charitable purposes.

What is the 0% VAT Relief for Solar Battery Retrofits?

The 0% VAT relief for solar battery retrofits in the UK means you pay no Value Added Tax on the cost of installing an electrical storage battery system. This applies to installations in residential accommodation or qualifying charitable buildings. This temporary zero rate is active from 1 February 2024 and is scheduled to run until 31 March 2027. It covers both batteries installed as part of a new solar system and those retrofitted to an existing setup.

Understanding HMRC's VAT Notice 708/6

HM Revenue & Customs (HMRC) Notice 708/6, titled "Energy-saving materials and heating equipment," explains the VAT treatment for installing certain energy-saving materials. This notice clarifies when these installations are zero-rated or reduced-rated. The current zero rate for specified energy-saving materials applies from 1 May 2023 to 31 March 2027.

Specifically for electrical storage batteries, the notice states: "From 1 February 2024, electrical storage batteries installed in residential accommodation or buildings intended for use solely for a relevant charitable purpose qualifies for the temporary zero rate." This includes:

• Retrofitting: Adding a battery to an existing microgeneration system (such as solar panels, wind turbines, or water turbines).
• Standalone batteries: Installing a battery solely for storing electricity from the grid (mains electricity).
• Combined systems: Installing a battery that stores electricity from both microgeneration systems and the grid.

Crucially, this relief applies to the "services of installing energy-saving materials" and "the supply of energy-saving materials by the person who installs those materials." It does not apply if you purchase the battery without installation services. For example, "the sale of energy-saving materials by a retailer is always standard-rated."

What Qualifies for 0% VAT?

The 0% VAT rate applies under specific conditions related to the material, the type of installation, and the property where it is installed.

Qualifying Materials and Systems

The following are explicitly covered for the temporary zero rate from 1 February 2024:

• Batteries for storing energy converted from electricity: This includes batteries retrofitted to existing microgeneration systems, standalone batteries for storing grid electricity, or batteries that store from both sources.
• Smart diverters: These devices automatically divert electricity generated by microgeneration systems to electrical appliances. They qualify for the temporary zero rate when retrofitted to microgeneration systems.

Solar panels themselves also qualify for the zero rate. "Solar panels include all systems that are installed in, or on the site of, a building and that are: solar collectors such as evacuated tube or flat plate systems, together with associated pipework and equipment, such as circulation systems, pump, storage cylinder, control panel and heat exchanger; photovoltaic (PV) panels with cabling, control panel and AC/DC inverter."

Installation Scope

"Installation, in this context, means putting in place energy-saving materials. This involves some process by which materials are permanently fixed in place." The relief applies to the services of installation and the supply of materials by the installer.

Qualifying Properties

The installation must be in one of two types of buildings:

1. Residential Accommodation: This category is broad and includes:

• • Houses, blocks of flats, or other dwellings.
  • Armed forces residential accommodation.
  • Children’s homes, care homes, hospices.
  • Institutions where at least 90% of residents reside.
  • Monasteries, nunneries, and similar religious communities.
  • Residential accommodation for students or pupils.
  • Self-catering holiday accommodation.
  • Caravans or houseboats used as a person’s sole or main residence.

2. Buildings for Relevant Charitable Purposes: "From 1 February 2024, the relief has been extended to include buildings intended for use solely for a relevant charitable purpose." This means use by a charity "otherwise than in the course or furtherance of a business; as a village hall or similarly in providing social or recreational facilities for a local community." Installers should take "reasonable steps to ensure that your customer will use the building for a relevant charitable purpose and retain the appropriate documentation."

Single vs. Mixed Supplies

When other works are carried out alongside the battery installation, it's important to distinguish between single and mixed supplies:

• Single Supply: This occurs when one element is the principal supply and others are ancillary (not an aim in itself, but a better means of enjoying the principal supply). Indicators include a single price, being advertised as a package, components not available separately, and simultaneous installation. If the principal element is zero-rated, the entire single supply can be zero-rated.
• Mixed Supply: This occurs when one or more elements are distinct and independent. Indicators include separate pricing or invoicing, items available separately, and elements not interdependent. In such cases, the VAT rate applies to each distinct element.

What You Can Check Yourself, and What You Cannot

Understanding the 0% VAT relief involves checking specific conditions.

What you can check yourself:

• Installation Date: Confirm that your battery installation is scheduled to occur between 1 February 2024 and 31 March 2027.
• Service Type: Ensure your contract with the installer includes the installation service, not just the supply of the battery unit.
• Property Type: Verify that your property falls under the definition of "residential accommodation" or is a "building intended for use solely for a relevant charitable purpose" as outlined in HMRC Notice 708/6.
• Material Eligibility: Confirm that the electrical storage battery is listed as a qualifying energy-saving material.

What you cannot check yourself:

• Complex Property Use: If your property has mixed residential and commercial use, or other complex arrangements, determining VAT eligibility can be intricate. The HMRC notice does not provide specific guidance for such scenarios.
• Legal Interpretation: The precise interpretation of terms like "ancillary" in complex installations or the "reasonable steps" an installer must take for charitable buildings may require expert advice.
• Tax Advice: This information is general guidance. For specific tax advice related to your unique circumstances, you should consult a qualified tax professional or HMRC directly.

What the Published Sources Do Not Tell You

HMRC Notice 708/6 provides comprehensive guidance, but like any general tax notice, it has limitations regarding specific edge cases:

• Partially Residential/Commercial Properties: The notice does not offer specific guidance on how to handle situations where a solar PV system or battery is installed on a property that is partially residential and partially commercial (e.g., a shop with a flat above). The relief is explicitly for "residential accommodation" or "charitable buildings."
• Complex Mixed-Use Examples: There are no detailed examples of complex mixed-use properties or how to apportion VAT in such cases.
• Ongoing Maintenance and Repair: The notice primarily covers "installation." It does not provide specific guidance on the VAT treatment of ongoing maintenance or repair services for solar PV systems or batteries after the initial installation, unless such services fall under grant-funded schemes (which apply a 5% reduced rate and are not the focus of the 0% VAT article).
• Definition of "Curtilage": While the term "curtilage" is used in relation to ground and water source heat pump installations, it is not explicitly defined within this notice.
• "Reasonable Steps" for Charitable Purpose: The notice does not provide specific criteria or examples for what constitutes "reasonable steps" an installer should take to ensure a building is used for a relevant charitable purpose.