Born in Byron Zerphy’s Allentown garage in 1990, Solar Technology, Inc. grew from his effort to replace noisy, fuel-consuming highway equipment with a cleaner solar-powered alternative. Founded as a company in 1991, SolarTech remains an Allentown manufacturer of portable traffic-control equipment for road and bridge work zones, with five U.S. patents and ISO 9001:2015 certification. It conducts its engineering, manufacturing and support at a single facility.
ISO 9001:2015 Certification
CE Certification
Federal Highway Administration Manual on Uniform Traffic Control Devices
Compliance program
Ontario Certification of Compliance
Silent Messenger UK Type Approval
National Transportation Product Evaluation Program Evaluations
Registration
CE
Quality certification
MUTCD
Quality certification
NTPEP
Quality certification
Silicon SolarBorn from a high-school science project in upstate New York, Silicon Solar designs and manufactures solar energy products and custom solar systems, including its long-running SunPal sign lights and AquaJet fountain pumps. Founded in 1999 by Adam Farrell, the family-owned company now serves more than 150,000 customers and operates a New York manufacturing facility alongside international production partnerships. Its Bainbridge training center also reflects the company’s early roots in making solar technology accessible to students and teachers.BAINBRIDGE, NY
Path Master, IncFamily-owned since its founding in 1976 by current president Randall Van Scoy, Path Master has grown into a Twinsburg-based traffic technology company serving public agencies across four states. Its 39-person team combines engineering expertise with stocked inventory, custom cabinet fabrication, field support, and hands-on customer training. Path Master is particularly distinctive for staying involved beyond the sale, including cabinet turn-ons and rapid response when traffic equipment fails.TWINSBURG, OH
GoSun IncGoSun Inc. is an American solar company that has spent more than a decade developing portable energy solutions for greater independence off the grid. Based in Cincinnati, it has deployed more than 150,000 units in over 70 countries and now applies that experience to practical equipment for outdoor users, homeowners, and working properties.CINCINNATI, OH
General Highway ProductsKnown in the mid-Atlantic transportation industry for dependable service since 1979, General Highway Products supports public-road agencies from its Broomall, Pennsylvania, base. The company assembles and tests traffic-control equipment for customers across Pennsylvania, New Jersey, and Delaware, with remote offices extending its reach into central and western Pennsylvania. It is PennDOT-certified as a DBE/WBE.BROOMALL, PA