Resource hub Funding Watch Carbon Trust and Siemens Energy Efficiency Financing Scheme (EEF) Usually one or a combination of a finance lease, lease purchase, loan finance, or sometimes an operating lease. Any organisation trading for at least 36 months and able to provide latest full company financials.Operating lease only available to schools and academies. Energy efficiency assets can be funded over max 5 years, energy generation assets over max 7 years. No deposits usually required. Amount: Over £1,000 Find out more.