RGS Energy 87.8 Rating Score™ Other Of 156 ratings/reviews posted on 4 verified review sites, RGS Energy has an average rating of 4.5 stars. This earns a Rating Score™ of 87.8. View Profile & Reviews 07/19/2017 Verified Almost 4 years ago RGS installed a 4.5kw system. In October 2017 the saving from these panels will have fully repaid net cost. Great estimates and quality installation are impressive. And RGS will be around to support me in the future.