A few days ago, I wrote about the expansion of eEnergy, one of a growing number of businesses selling energy efficiency as a service (EEaaS). The phrase, derived from the shift to software as a service caused by the migration of IT infrastructure into the cloud, bundles supplies, installation, maintenance, finance and risk into an off-balance sheet single contract with monthly payments. Utilities like ESB and Energia, specialists like eEnergy or Urban Volt and traditional electrical contractors are competing in this market estimated by Roland Berger Consultants last year to double in size to €50 billion in Europe by 2025.…