SDCL Efficiency Income Trust PLC SDCL Efficiency Income Trust PLC is a United Kingdom-based closed-ended investment trust that invests exclusively in energy efficiency infrastructure projects, delivering cheaper, cleaner and more reliable energy solutions to commercial, industrial and public sector customers; its portfolio includes operational assets such as combined heat and power plants, onsite solar photovoltaic systems, battery storage, district energy systems, supermarket solar installations, green gas-to-grid projects, electric vehicle charging sites and demand-reduction technologies. The company, incorporated in 2018 and headquartered at The Scalpel, 18th Floor, 52 Lime Street, London EC3M 7AF, generates attractive total returns for shareholders through stable dividend income, capital preservation and growth opportunities via a diversified portfolio of approximately 50 projects across ten countries, primarily in the United States and Europe with additional exposure in the United Kingdom and other European markets including Portugal, Spain and Sweden; investments target sectors such as healthcare, industrials, commercial real estate, retail and data centers, with long-term contracts averaging 16 years and predictable cashflows independent of power prices. Managed by Sustainable Development Capital LLP, a specialist firm established in 2007 with offices in London, New York, Dublin, Hong Kong and Singapore, the trust changed its name from SDCL Energy Efficiency Income Trust PLC on 21 May 2025; recent developments include its wholly-owned subsidiary Onyx Renewable Partners LP securing a $260 million senior secured credit facility in June 2025 arranged by Apterra Infrastructure Capital to self-fund growth in US distributed energy projects like onsite solar PV and battery storage, reducing reliance on the trust's revolving credit facility, alongside financing for the Zood electric vehicle charging portfolio and exploration of equity capital partnerships or private transactions for Onyx amid US policy uncertainty.