Founded in 1993, Morningstar Corporation makes solar charge controllers and off-grid inverters for remote and mission-critical power systems. The employee-owned company has sold more than 4 million products in over 100 countries, with fanless thermal designs and an ISO 9001-certified manufacturing operation built around long service life. Its Maryland engineering facility includes a 35-kilowatt photovoltaic installation for real-world testing and product development.
ISO 9001
UL 1741
CSA C22.2 No.107.1.01
FCC Class B Part 15
IEC 62109-1
CE
RoHS
Hazardous Location (HazLoc) Certification
FCCPART15
Quality certification
National Solar TechnologiesSince 1997, National Solar Technologies has built its identity around dependable solar engineering from its 34,000-square-foot facility in suburban Buffalo. The company is known for designing systems that can withstand harsh climates and remote assignments, including work for U.S. military and government agencies. NST has deployed more than 10,000 systems across 20 countries.DEPEW, NY
IronRidge, IncFounded in the mid-1990s to support off-grid installations, Hayward-based IronRidge designs and manufactures structural hardware for residential and commercial solar systems. Its roof, flat-roof and ground-mount platforms grew from an early steel-pole solar attachment into systems supporting hundreds of megawatts, with products tested for extreme conditions and backed by an ISO 9001-certified quality system. IronRidge has operated as an Enstall company since 2019 while retaining its own team and product lines.FORT WASHINGTON, PA
Solar Technology, IncBorn 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.334290ALLENTOWN, PA
Stored Energy Systems (SENS)Founded in 1971 by battery-industry veteran Herb Kaewert, Stored Energy Systems (SENS) designs and manufactures DC power and engine-starting systems for mission-critical infrastructure. The Colorado-based company now makes its equipment in U.S. facilities spanning more than 130,000 square feet, using worst-case design and factory testing for applications where downtime is not an option. SENS has maintained ISO 9001 certification since 1996 and says its systems support more than 75% of North American critical-power gensets above 500 kW.334519HATFIELD, PA