Kohler Standy and Portable Generator System - Keystone is proud to have partnered with Kohler to offer their full range of catalogs. With the looming danger of power outages in every season, Kohler is a peace-of-mind product that will look after your home and your family year round. Call today to schedule a consultation! With rising power costs in Texas Keystone Solar brings state of the art technology to manage even the highest levels of home energy usage. See what Keystone Solar by Electrious—with its AI-enabled design platform can create for your home.