There’s a certain nobility in making do with less, carving away the wasted watts permeating modern business while keeping the lights on and the doors open. For some, this means LEDs and heat pumps. For others, it means hiring a professional. Errol Pereira of Efficiency Nova Scotia has overseen the Onsite Energy Manager service since 2016, an initiative which embeds one of his efficiency colleagues into a partnering business full time, and puts…