A startup offering Groupon-style group discounts for solar panel roof installations is now looking to connect with potential solar customers nationwide. On Monday One Block Off the Grid (1BOG) plans to expand access to its group solar discounts, installer recommendations and solar information services to another set of almost two dozen states across the U.S. 1BOG works by using the power of the group to leverage a low-cost solar deal in certain areas. Similar to Groupon, 1BOG collects a critical mass of interested solar customers in a given area and uses the volume of people to make deals with local solar installers. Think of the service as a way for entire neighborhoods to go solar in one fell swoop.