UK hotel groups subject to SECR (Streamlined Energy and Carbon Reporting) — typically those with 250+ employees, £36m+ turnover, or £18m+ balance sheet total — face annual disclosure requirements on energy use, Scope 1 and 2 emissions, and intensity ratios. On-site solar PV directly reduces Scope 2 emissions and contributes to group-level SBTi-validated reduction trajectories. The detail of how solar integrates into SECR and Scope 2 reporting matters: get it right and the solar installation supports a comprehensive sustainability narrative; get it wrong and you under-report the climate benefit.
SECR — what UK hotel groups must report
SECR mandatory for UK quoted companies and large unquoted companies/LLPs meeting two of three criteria: 250+ employees, £36m+ turnover, £18m+ balance sheet total. Disclosure required as part of the Annual Report. Required content:
- UK energy use: annual kWh consumption across natural gas, purchased electricity, transport fuels
- Associated GHG emissions: Scope 1 (direct combustion + fugitive) plus Scope 2 (purchased electricity, heat, steam)
- Intensity ratio: tCO2e per unit of business activity (typical hotel group: per occupied room-night, per square metre, per £m revenue)
- Methodology and year-on-year comparison: calculation methodology, prior-year comparator, narrative explanation of significant changes
- Energy efficiency actions taken: qualitative description of efficiency improvements implemented in the reporting year
How on-site solar reduces reported Scope 2
Scope 2 emissions = purchased electricity × grid carbon intensity. UK grid carbon intensity in 2024 was approximately 0.207 kg CO2e/kWh (DESNZ published factor); 2026 estimate approximately 0.182 kg CO2e/kWh as grid continues to decarbonise. On-site solar that self-consumes 250,000 kWh/year reduces Scope 2 by approximately 45 tonnes CO2e/year at current UK grid factor.
Two SECR calculation methods:
Location-based method
Scope 2 calculated using grid average carbon intensity factor. Solar generation self-consumed reduces grid import; the offset Scope 2 emission is reported. Reported by all UK SECR filers as the primary method.
Market-based method
Scope 2 calculated using supplier-specific contractual instruments — REGOs (Renewable Energy Guarantees of Origin), GO certificates, supplier-specific emissions factors. On-site solar with REGO certificates demonstrates ownership of the renewable attributes, allowing market-based reporting to attribute zero emissions to the solar-generated electricity. Increasingly required by SBTi-validated targets.
SBTi-validated targets and solar contribution
UK hotel groups with SBTi-validated near-term and net-zero targets — including Whitbread (Premier Inn), Marriott, IHG, Hilton, Accor — typically commit to 42% Scope 1+2 reduction by 2030 (against 2018-2020 baseline) and net-zero by 2050. On-site solar at scale across the UK estate typically contributes 5-15% of the total Scope 1+2 reduction pathway — with the balance coming from energy efficiency, fuel switching (gas to heat pumps), grid decarbonisation, and (limited) compensating measures.
The practical implication: brand-group sustainability teams need to track solar generation contribution to the SBTi trajectory. We provide standardised quarterly reporting on each property's solar generation in formats compatible with the major brand platforms (LightStay, MyEnergy, Green Engage, Planet 21).
TCFD framework alignment
TCFD (Task Force on Climate-related Financial Disclosures) framework mandatory for UK premium-listed companies since 2022 and increasingly required by lender covenants and investor relations. TCFD requires disclosure of climate-related risks across four pillars: Governance, Strategy, Risk Management, Metrics and Targets. On-site solar contributes evidence to Strategy (transition pathway) and Metrics and Targets (Scope 2 reduction trajectory).
For hotel groups subject to TCFD, the on-site solar capex case typically positioned as transition-risk mitigation: reducing exposure to grid electricity price volatility, regulatory carbon pricing risk, and grid carbon intensity variability.
CDP Climate Change disclosure
UK hotel groups participating in CDP Climate Change disclosure (typically as part of supplier panel inclusion with FTSE 100 corporate-events buyers) report solar installation data, generation kWh, Scope 2 reduction, and capital allocated to renewable energy. CDP A-list and Leadership-band scoring typically requires demonstrable Scope 2 reduction trajectory with concrete capex examples.
Brand platform integration for chain hotels
Solar generation data flows to brand sustainability platforms in real-time:
- Hilton LightStay: monthly reporting cadence, property energy intensity scoring
- Marriott MyEnergy: hourly data feed via API, group Scope 2 calculation
- IHG Green Engage: monthly cadence, Energy Standard compliance reporting
- Accor Planet 21: monthly cadence, Solar Energy UK alignment
- Whitbread Force for Good: integrated with group sustainability platform
We deliver brand platform integration as standard handover for any chain hotel installation.
SECR + Scope 2 reporting FAQs
Which UK hotel groups must file SECR?
SECR mandatory for UK companies meeting two of: 250+ employees, £36m+ turnover, £18m+ balance sheet total. Most UK hotel groups with 20+ properties trigger SECR; smaller groups voluntary. Filed as part of Annual Report. Discloses energy use, Scope 1 emissions, Scope 2 emissions, and intensity ratio.
How does on-site solar affect Scope 2?
Solar generation directly offsets grid electricity import, reducing Scope 2 emissions in proportion. For SECR location-based method, solar reduces reported Scope 2 by (kWh self-consumed × UK grid carbon intensity). For market-based method, solar with GO certificates can reduce Scope 2 further.
SBTi and TCFD alignment with solar?
Solar generation contributes to SBTi-validated near-term and net-zero target trajectories — typically 5-15% of total Scope 1+2 reduction pathway for UK hotel groups. TCFD framework requires disclosure of physical and transition climate risks; on-site renewable energy demonstrates transition-risk mitigation.