These are all big obstacles, but they also represent a huge untapped opportunity, according to Pier LaFarge, co-founder and CEO of Sparkfund, a company that offers a subscription model for funding advanced energy technologies. LaFarge started Sparkfund with several co-founders four years ago, based on the notion that the successful As-A-Service software model could also be brought to energy efficiency (and other technologies, such as energy storage, electric vehicle infrastructure and water efficiency). In the few short years since Sparkfund began operations, its model has been picking up speed. To date, LaFarge indicates the company has “just north of 200 customers, with deployments in 43 states across hundreds of buildings, and more than $32 million in energy technology deployed.”
https://www.forbes.com/sites/peterdetwiler/2018/01/02/can-a-subscription-approach-help-accelerate-adoption-of-advanced-energy-technology/#459489286ef5