SHDF Wave 2.2 Solar Guide 2026 — Round 2 Application Playbook

The Social Housing Decarbonisation Fund Wave 2.2 is the dominant funding route for UK housing association and registered provider schemes deploying solar PV. With £1.29 billion of funding committed 2025–2028 and Round 2 expected to open Q4 2026, RPs operating sheltered, extra-care, and supported-living schemes have a meaningful window to apply. This piece sets out the application process, eligibility, evidence requirements, common pitfalls, and timing.

What SHDF Wave 2.2 funds

SHDF Wave 2.2 is administered by Salix Finance on behalf of the Department for Energy Security and Net Zero (DESNZ). The fund covers three intervention categories on social housing stock:

• Building fabric improvements — insulation (loft, wall, floor), glazing, air-tightness, draught-proofing
• Low-carbon heat — heat pumps (air-source, ground-source), heat networks, hot water heat pumps
• On-site renewables — solar PV (where it offsets landlord-supplied electricity), solar thermal, occasionally wind

Match funding is up to 50% of total project cost. The RP must fund the remaining 50% from capital budget, grant overlay, or operational reserves. For a £1m combined fabric + heat pump + solar programme on a sheltered scheme, SHDF can fund £500k.

Who can apply

SHDF Wave 2.2 is restricted to registered providers of social housing. This includes:

• Housing associations registered with the Regulator of Social Housing
• Local authority landlords
• Almshouses with registered provider status
• Community land trusts where they operate as registered providers

Private care home operators cannot apply directly. Where a private care operator partners with an RP landlord (common in extra-care and supported-living schemes), the RP applies and the care operator benefits through reduced communal electricity costs flowing into the service charge structure.

What stock qualifies

The fund covers social housing stock — meaning property held under social housing tenure. For the care home sector specifically:

• Sheltered housing — independent-living schemes for older residents with scheme manager or warden, communal facilities, RP ownership. Strongly eligible.
• Extra-care housing — schemes combining independent living with on-site care service, RP ownership. Strongly eligible.
• Supported-living homes — small-scale homes for adults with learning disabilities, mental health, autism. Eligible where RP-owned (most are, often via specialist housing associations like Advance Housing, Inclusion Housing).
• Almshouses — older charitable housing settings. Eligible where registered provider status is held.
• Standard private care homes — not directly eligible. Some hybrid structures exist where the property is RP-owned but operated under management contract with a private operator.

Round 2 timing — what’s expected

Round 1 of Wave 2.2 closed February 2025. Round 2 is expected to open in Q4 2026 with submission window of approximately 12 weeks. Provisional timeline (subject to DESNZ confirmation):

• October 2026: Application window opens
• January 2027: Application window closes
• April 2027: Award decisions notified
• 2027-2028: Programme delivery

Successful applications can commit to programme delivery over a 2-year window. Multi-site programmes are encouraged; bundling 3-10 sites into a single application is common practice.

Application evidence requirements

A strong SHDF Wave 2.2 application includes:

Asset-level evidence

• Current EPC certificates for all properties in scope
• Floor area, building age, construction type per property
• Current energy performance data (12+ months of meter readings)
• Building survey reports identifying fabric weaknesses
• Existing heating system specifications

Proposed intervention evidence

• PVSyst or SAP energy modelling of proposed solar systems (we provide as part of standard install)
• Heat pump sizing calculations and COP estimates
• Fabric upgrade specifications
• Combined system performance projections (kWh/year, kg CO₂e/year, EPC point improvement)

Financial evidence

• Total project cost breakdown by intervention
• Match funding source confirmation (RP capital, board approval letter)
• 25-year cashflow projection showing operational savings
• VFM (Value for Money) assessment using Salix methodology

Programme delivery evidence

• Project management plan
• Contractor procurement plan (typically via OJEU-compliant or Find a Tender notice)
• Resident consultation plan (Section 20 compliance for leasehold elements)
• Delivery milestones and risk register

ESG and reporting commitments

• Annual carbon savings reporting commitment
• Resident engagement plan
• Lessons-learned dissemination commitment

Application timeline

For a typical Round 2 application covering 3-5 schemes:

• Weeks 1-2: Initial scoping with RP energy lead
• Weeks 3-4: Asset-level data collection
• Weeks 5-6: Energy modelling (PVSyst for solar, SAP for fabric, heat pump COP modelling)
• Weeks 7-8: Cost engineering and procurement plan
• Weeks 9-10: Cashflow modelling and VFM assessment
• Weeks 11-12: Resident consultation drafting, Section 20 compliance
• Weeks 13-14: Application narrative drafting
• Weeks 15-16: Internal RP board sign-off
• Week 17-18: Submission

We write the energy modelling and application narrative on behalf of RPs we work with — typically as a no-fee element of the install contract conditional on grant award.

Common application pitfalls

Reviewing publicly-shared SHDF Wave 1 and Wave 2.1 outcomes, common reasons applications were unsuccessful:

• Insufficient energy data baseline. Less than 12 months of meter data, or estimated rather than actual consumption.
• Weak match funding evidence. No formal board approval letter, vague reference to “capital budget”.
• Procurement plan unspecific. No clear contractor selection methodology.
• Resident consultation gaps. Section 20 evidence missing where leasehold elements exist.
• Single-intervention applications. Solar-only or heat-only applications scored lower than combined fabric + heat + renewables.
• Underspecified delivery plan. Vague timelines without milestone commitments.

The strongest applications combine 3+ intervention categories with strong evidence across all five evidence requirements above.

What success looks like

Approximate Wave 2.1 outcomes (publicly disclosed): around 65% of applications received some funding award, though typically at reduced scope versus original ask. Average award per RP application: £400k-£800k. Total programme size for successful applications typically £800k-£2m including RP match funding.

Round 2 is expected to have higher application volume than Wave 2.1 (more RPs now aware of the fund). Expect competitive selection. Strong technical modelling and resident engagement narratives differentiate successful applications.

Maximising application strength

Three things we recommend to RPs preparing for Round 2:

1. Bundle interventions. A combined fabric + heat pump + solar application scores materially higher than single-intervention.
2. Bundle schemes. A multi-scheme application (3-10 properties) is typically scored more favourably than single-scheme.
3. Front-load technical modelling. Strong PVSyst output, accurate SAP modelling, and conservative COP assumptions create more credible applications than aggressive top-line numbers.

For more on funding routes generally, see our grants and funding guide. For the technical depth on combined solar + heat pump systems, see solar and heat pumps for care homes. For the SHDF context within broader social care decarbonisation, see the decarbonisation pillar.