Battery Storage Grants & Funding in Hampshire 2026: What You Can Actually Claim

The Most Valuable "Grant" Available to Everyone: 0% VAT

The single most widely available form of financial support for battery storage in 2026 is not a grant at all — it is the zero rate of VAT on batteries and solar panels, introduced in February 2024 and currently confirmed until 31 March 2027.

Before 2024, batteries were subject to 20% VAT when installed alongside solar panels, and 5% when installed as standalone units. The current 0% rate applies to both solar panels and battery storage systems, whether installed together or as a standalone retrofit — the most generous possible rate.

What this means in practice:

A 10kWh battery system with an installed cost of £4,200 at 0% VAT would have cost £5,040 at 20% VAT — a saving of £840 that applies automatically to every eligible installation without any application process.

For a complete 5kW solar panel + 13.5kWh battery system quoted at £14,000, the pre-2024 cost at 20% VAT would have been £16,800. The £2,800 difference is effectively a grant that requires no application, no means testing, and no bureaucracy.

This tax relief is due to be reviewed in March 2027. Installing before that date locks in the 0% rate for your system.

• 0% VAT on all solar panels and battery storage: confirmed until March 2027
• Applies to new installs and retrofits equally
• No application required — automatically applied by MCS-certified installers
• Saving on a 10kWh battery: approximately £700-1,000 vs pre-2024 VAT rates
• Saving on a complete solar + battery system: approximately £2,000-3,500

Warm Homes Local Grant: Who Qualifies in Hampshire

The Warm Homes Local Grant (WHLG) is the successor to the Home Upgrade Grant (HUG2) and is the primary publicly-funded route to free or heavily subsidised battery storage for Hampshire homeowners in 2026.

Hampshire County Council received over £26 million in Warm Homes Local Grant funding in 2025. This fund targets households with low Energy Performance Certificate (EPC) ratings (D, E, F, or G) who also meet an income or vulnerability criterion.

Basic eligibility criteria:

1. Property: owner-occupied or private rented in Hampshire 2. EPC rating: D, E, F, or G 3. Income or vulnerability: either household income below £36,000 per year OR the property must be in a low-income area (identified by Index of Multiple Deprivation) 4. Fuel type: the property must use an inefficient fuel (oil, LPG, electric direct heating, or biomass — not mains gas)

For qualifying households, the grant can fund: loft insulation, cavity wall insulation, external wall insulation, solar panels, battery storage, heat pumps, and other energy efficiency measures. The maximum grant is £15,000 for most households, rising to £30,000 for solid-wall properties requiring external insulation.

Batteries are funded only as part of a package alongside other improvements — standalone battery grant applications are not currently supported under WHLG.

• Hampshire WHLG allocation: over £26 million in 2025
• Eligibility: EPC D-G + income below £36,000 or low-income area
• Maximum grant: £15,000 standard, £30,000 for solid-wall properties
• Battery storage: fundable as part of a full retrofit package
• Standalone battery only: not currently fundable under WHLG

ECO4: What It Does and Does NOT Cover for Batteries

The Energy Company Obligation (ECO4) scheme is frequently misquoted as a route to free solar panels or batteries. This is incorrect and causes real confusion for Hampshire homeowners.

ECO4 covers: loft insulation, cavity wall insulation, solid wall insulation, and heating system upgrades (e.g., gas boiler replacement, heat pump installation in some cases). It is administered by energy suppliers and targets fuel-poor households.

ECO4 does NOT cover: solar panels or battery storage systems. The scheme explicitly excludes solar PV from eligible measures. This restriction has been in place since ECO was established and has not changed under ECO4.

The ECO4 scheme is expected to run until December 2026, after which the Warm Homes Plan is intended to take over the energy efficiency support landscape.

Some unscrupulous installers advertise "free solar panels under ECO4" — this is either misleading (the solar might be funded through a different, linked scheme) or fraudulent. Any offer of genuinely free solar panels should include a clear explanation of which specific scheme funds them.

• ECO4 covers: insulation, heating upgrades — NOT solar or battery storage
• ECO4 runs until approximately December 2026
• Free solar via ECO4: not possible — any such offer deserves scrutiny
• Legitimate free solar routes: Warm Homes Local Grant (for qualifying households)
• Commercial "free solar" schemes: may involve roof rental/lease — read all terms

The Warm Homes Plan: What Hampshire Households Can Expect

The UK government's Warm Homes Plan, announced in January 2026, is a £15 billion, four-year programme intended to upgrade approximately 5 million homes with energy efficiency measures and clean heating. It is the most significant energy retrofit programme since the Green Deal (which failed) and represents a substantial opportunity for Hampshire homeowners.

For lower-income households (income below £36,000 or specific vulnerability criteria), the Warm Homes Plan will provide grants — effectively continuing and expanding the Warm Homes Local Grant programme. Solar panels and battery storage are explicitly included as eligible measures.

For higher-income households (above the income threshold), the Warm Homes Plan is expected to provide 0% interest loans rather than outright grants. The loan scheme is not yet fully operational as of March 2026 — the government is still finalising the loan infrastructure. Repayments would be structured to be lower than energy bill savings, making the scheme self-funding for households that take it up.

Our expectation: the loan scheme will become available in late 2026 or 2027. Installing before the loan scheme launches allows you to benefit from 0% VAT regardless, and the battery you install now will be generating savings immediately rather than waiting for a loan scheme to open.

• Warm Homes Plan: £15 billion, 4-year programme announced January 2026
• Lower-income grants: continue and expand the current WHLG scheme
• Solar and battery: explicitly included in eligible measures
• Higher-income loans: 0% interest expected, finalisation timeline unclear (est. late 2026)
• Action now: 0% VAT available immediately, no need to wait for loan scheme

The Boiler Upgrade Scheme: For Heat Pump Pairing

The Boiler Upgrade Scheme (BUS) is the one significant UK grant that solar and battery installers can leverage — but only when the installation includes a heat pump.

The BUS provides £7,500 towards the cost of an air source heat pump installation. It does not fund battery storage directly, but homeowners who receive a BUS grant for a heat pump frequently combine the heat pump with solar panels and a battery as part of the same energy upgrade project. In these cases, the £7,500 BUS grant effectively reduces the combined project cost, making the solar and battery component proportionally more affordable.

The BUS is funded until at least 2030 with a total budget of £2.7 billion. It is one of the genuinely well-funded and straightforward grant schemes currently available. Eligibility: the property must be replacing an existing fossil fuel heating system (gas, oil, or LPG boiler) with an air source heat pump.

Solent Solar works with accredited heat pump installation partners for combined solar-plus-heat-pump projects and can coordinate the BUS grant application alongside your solar installation.

• BUS grant: £7,500 for air source heat pump (runs to at least 2030)
• Does not fund battery directly, but offsets overall project cost
• Eligibility: replacing gas, oil, or LPG boiler with ASHP
• Combined solar + ASHP + battery: total project cost reduced by £7,500
• We coordinate BUS applications for combined heat pump + solar projects

Summary: What Hampshire Homeowners Can Actually Access in 2026

To cut through the confusion, here is a concise summary of what is genuinely available right now for battery storage funding in Hampshire:

Available to everyone (no application required): 0% VAT on solar and battery storage, saving £700-3,500 depending on system size. Valid until March 2027.

Available to lower-income households (EPC D-G, income under £36,000 or low-income area): Warm Homes Local Grant — up to £15,000 (or £30,000 for solid-wall properties). Can fund batteries as part of a full retrofit package. Apply through Hampshire County Council.

Available to households replacing fossil fuel heating: Boiler Upgrade Scheme — £7,500 towards ASHP, which reduces the cost of combined solar+heat pump+battery projects.

Not yet available but expected in 2026-2027: 0% interest loans for higher-income households under the Warm Homes Plan.

Not available despite some claims to the contrary: free standalone battery grants for average-income homeowners, ECO4 funding for solar or batteries, or any other national scheme specifically targeting residential battery storage without accompanying measures.

• Everyone: 0% VAT saves £700-3,500 automatically (no application)
• Lower-income (EPC D-G, income <£36k): WHLG up to £15,000-30,000
• Heat pump buyers: BUS grant £7,500 reduces combined project cost
• Coming soon (est. late 2026-2027): 0% interest loans via Warm Homes Plan
• Not available: standalone battery grants for average-income households