SECR (Streamlined Energy and Carbon Reporting) has been mandatory for large UK companies since April 2019. For warehouse operators, electricity is the dominant Scope 2 category — and solar PV is the primary measure to reduce it. This guide covers how solar PV flows through SECR reporting and what monitoring data you need to stay audit-ready.
What SECR requires warehouse operators to report
Annual energy use (kWh) for the financial year: electricity (imported from grid + on-site generated), gas, and transport fuel. Annual greenhouse gas emissions in tonnes CO2e: Scope 1 (direct — gas, diesel, refrigerant leakage), Scope 2 (purchased electricity). Intensity metric. Energy efficiency actions taken in the year — solar PV is a reportable action. SECR is mandatory for large UK companies: 250+ employees, OR £36m+ turnover and £18m+ balance sheet.
Location-based vs market-based Scope 2
SECR requires Scope 2 on a location-based basis (UK grid emissions factor). Optional additional disclosure on a market-based basis (residual mix factor or energy attribute certificates). On-site solar generation is zero-carbon on both bases — location-based zero-carbon by definition (no grid-imported electricity for self-consumed solar). Location-based Scope 2 calculation: grid imported kWh × UK grid emissions factor (0.207 kgCO2e/kWh in 2025, declining ~3%/yr). For 1 MW warehouse install generating 920 MWh/yr at 80% self-consumption: 736,000 kWh self-consumed. Scope 2 reduction: 736,000 kWh × 0.207 kgCO2e/kWh = 152 tCO2e annually.
What monitoring data SECR requires
SECR submissions are subject to board-level sign-off and external audit. Auditors need: metered half-hourly import data (from energy supplier or smart meter); solar generation data from monitoring platform (PVSyst-calibrated); export data from SEG smart export meter. Our monitoring platform provides pre-formatted SECR data exports (monthly CSV + PDF) aligned with current UK Conversion Factors — compatible with SECR Reporter, Greenstone, Worldfavor, Watershed, and Persefoni reporting platforms.
How solar PV improves your SECR position
Four ways solar affects the SECR narrative: (1) Direct Scope 2 reduction (quantified in tCO2e); (2) Reportable energy efficiency action (positive narrative for board directors' SECR statement); (3) Improved energy intensity metric (tCO2e per £m turnover or per tonne output — improves as Scope 2 falls); (4) Alignment with Paris Agreement trajectory (the SECR guidance encourages forward-looking statements linking actions to net zero commitments).
Worked example: 800 kW distribution centre, £34m turnover
Pre-solar SECR: Grid imported electricity 1,600 MWh/yr. Scope 2: 331 tCO2e. Post-solar (800 kW, 75% self-consumption): Solar generated 744 MWh/yr. Self-consumed: 558 MWh. Grid imported falls: 1,600 - 558 = 1,042 MWh. Scope 2 post-solar: 1,042 MWh × 0.207 = 216 tCO2e. Scope 2 reduction: 115 tCO2e (35%). Energy intensity improvement: tCO2e/£m turnover from 9.7 to 6.4 (-34%).
See more
SECR guide for warehouse operators: /guides/warehouse-solar-secr-reporting-guide/. Net zero strategy guide: /guides/warehouse-net-zero-solar/. Free SECR-aligned monitoring: /contact/.
UK warehouse solar economics 2026 — at a glance
UK commercial solar PV for warehouses has fundamentally changed economically between 2019 and 2026. Three structural shifts drive current 4-6 year paybacks: grid electricity has nearly doubled from 12-15p/kWh blended day rate in 2019 to 16-26p/kWh in 2026, with peak Time-of-Use rates now reaching 28-35p/kWh during 16:00-19:00 evening peak; battery system cost has fallen from £700-£900/kWh installed in 2020 to £250-£450/kWh in 2026; and 100% Annual Investment Allowance up to £1m of capex per year delivers immediate 25% corporation tax relief on solar capex. A typical 1 MW warehouse rooftop solar install costs £700,000-£800,000, generates 870,000-950,000 kWh per year, displaces £155,000-£180,000 of grid electricity annually, and pays back in 4-5 years before tax — 3-4 years after AIA tax shield.
Compliance pressure driving warehouse solar adoption in 2026
Four converging UK compliance forces make warehouse solar effectively necessary by 2030. (1) MEES trajectory: the Government has consulted on tightening the minimum standard for let commercial property to EPC B — current expectation is around 2031, applying to larger buildings (over 1,000 sqm expected), with the earlier EPC C 2027 interim milestone dropped. Not yet enacted, but already shaping landlord decisions. Solar PV adds 5-15 EPC points and is often the most cost-effective compliance route for warehouse stock currently at EPC C-D. (2) ESOS Phase 4 (December 2027 deadline): Energy Savings Opportunity Scheme requires large UK businesses to commission energy audits and implement or document rationale for solar recommendations. (3) SECR reporting: mandatory Streamlined Energy and Carbon Reporting requires Scope 1+2 emissions disclosure in annual reports — solar PV directly reduces reported Scope 2 figure. (4) Customer Scope 3 mandates: Amazon Climate Pledge, Tesco Net Zero, M&S Plan A, Sainsbury's Plan for Better, John Lewis Net Zero, JLR/Stellantis Tier-1 supplier programmes all flow Scope 3 supplier requirements through contract weighting and CDP/EcoVadis reporting. 3PL operators and owner-occupied warehouses serving these customers face direct commercial consequences if they fail to demonstrate verifiable renewable generation by 2027-2030.
How we model warehouse solar — half-hourly meter data, not assumptions
Every warehouse solar feasibility we deliver starts with your 12 months of half-hourly meter data and a roof drawing. Standard online solar calculators use generic per-sqft estimates that miss the operational pattern variation driving 30-40% of total payback difference. Our methodology: PVSyst yield model calibrated for your specific roof orientation, tilt and shading; self-consumption profile derived from your actual half-hourly demand at 15-minute resolution; 25-year DCF with monthly cashflow granularity; capital allowance schedule (AIA + ECA where applicable); grant funding scenario where eligible (IETF Phase 3 for manufacturers above 1 GWh/yr); SEG export tariff and REGO income; O&M cost schedule; sensitivity analysis on grid tariff inflation, self-consumption ratio, capex per kW and discount rate. Output: simple payback, after-tax payback, IRR, NPV at 4%/6%/8% discount rates, and 25-year cumulative return. If the numbers do not work for your specific site, we say so — we will tell you plainly when the economics do not justify proceeding.
Get a free desk feasibility — 7 working days
Send us 12 months of half-hourly meter data and a roof drawing (PDF or DWG). Within 7 working days we deliver: indicative system size from PVSyst modelling of your specific roof; financial DCF showing payback, IRR and NPV under three financing routes (outright purchase, asset finance, PPA); customer Scope 3 audit pack template for your supply chain context; grant funding eligibility assessment (IETF, local and devolved grant schemes, Enterprise Zone ECA, Freeport ECA); DNO connection cost estimate from grid heatmap; structural pre-assessment from drawings; honest assessment of whether your site suits solar. No charge, no obligation. Send your meter data via our quote form or email info@solarpanelsforwarehouses.co.uk — quote within 7 working days, guaranteed.