Last month, our friends at Vote Solar announced that it will challenge the Massachusetts Department of Public Utilities’ (DPU) recent decision to raise rates and create uncertainty for future solar customers in the Eversource utility territory. The non-profit advocate, represented by Earthjustice, is appealing a January 5th DPU order that forces residential solar customers to pay additional charges, which could range anywhere from $4,400 to $9,400 over the life of the solar system, depending on the customer.