Speaking from the UK, we’ve had a deregulated gas + electricity market for some time now. I’m currently with a supplier (Ecotricity) who project the unique selling point of investing all their profits in new wind farms, and they also do a mixed brown + green or pure green option. Here they promise to match the “brown” price of our top 6 electricity companies, so it’s not entirely infeasible that Viridian could offer a discount – especially in a market that is new to deregulation and hasn’t settled on a market price as opposed to a monopoly price.
I’m a little sad for you though – you’ll start to be bombarded by all the deeply annoying cold calls from people trying to get you to switch your energy supplies to their company, since all it takes to be an energy supplier now is an office, and because all it costs to move is administrative costs.
They’re also now selling bonds… I may actually buy a few. 7.5% is not to be sneezed at in the current economic climate.