SolarBridge Launches a US-Built 135 kW Power Conversion System for Commercial Batteries as FEOC Rules Squeeze Imports
SolarBridge Technology has introduced the Golden Gate STC-P135, a 135 kW bidirectional power conversion system (PCS) for commercial and industrial battery storage. It’ll be built in Dallas. Production equipment arrives at the plant this month, and local assembly starts in the first quarter of 2027.
The pitch is mostly about tax credits. Under the foreign entity of concern (FEOC) rules, storage projects that lean on equipment from restricted suppliers can lose federal credits. SolarBridge says its PCS uses a non-FEOC supply chain. That’s meant to give C&I developers a part that won’t put the credit at risk.
What the box does
A PCS sits between the battery, the grid and the building. It charges the battery, discharges it and keeps critical loads running in an outage. The Golden Gate unit is modular. Integrators can stack units up to about 1 MW to fit a site, and the design is battery agnostic.
Some specs from the launch:
- 135 kW bidirectional, grid-tied or off-grid operation
- DC battery range of 720 to 1,500 Vdc; between 720 and 820 Vdc it runs only in grid-connected, three-phase, 480 Vac mode
- Full output at ambient temperatures up to 45°C
The modular design also matters for uptime. If one module fails, the rest of the stack keeps running, which a single central inverter can’t do.
The gap it’s aiming at
Most PCS makers built their lines around multi-megawatt central units for utility-scale projects. Commercial sites in the 200 kW to 1 MW range have had fewer US-built choices and long lead times. That’s the opening SolarBridge is going after.
The Dallas plant is planned at up to 2.5 GW of annual capacity and about 50 jobs. Several national storage companies are due to start testing sample units in December. A second product, the STU-P450, a liquid-cooled 450 kW string PCS for utility-scale block stations up to 7.2 MW, is slated for the second quarter of 2027, alongside a Phase II expansion near Dallas.
Not the old SolarBridge
The name will ring a bell for anyone who followed microinverters. The original SolarBridge Technologies came out of the University of Illinois in 2004. Its microinverter business went to SunPower, which later sold it to Enphase. Today’s SolarBridge Technology Inc., founded in 2025 and based in Dallas, is a separate company that revived the brand.
That makes it a young manufacturer with no production record yet. The capacity and job figures are plans. The first real milestone is the sample testing in December.