China-based Sungrow and TÜV Rheinland completed field tests on the 1+X 2.0 modular inverter, verifying its DC-side safety functions. The system was assessed for short circuits, arc faults, loose-connection overheating, and low-magnitude overcurrent. Silver fuses disconnected within milliseconds, while copper fuses produced arc flashes. Arc faults were detected and isolated in 32 milliseconds, preventing propagation. Temperature sensors identified slow-rising heat from loose terminals and isolated the affected branch without reducing output. The pyro-fuse scheme cut a low-magnitude overcurrent in 1.472 milliseconds, avoiding component stress. TÜV Rheinland confirmed successful performance across all tests and noted the system’s capability for proactive detection, precise disconnection, and system-level protection. The results indicated a verifiable safety method for utility-scale DC-side operations as system voltages increased. Earlier this year, Zelestra delivered the José Cabrera solar plant for SachsenEnergie, and the company later partnered with Sungrow to advance the 273 MW Arequipa project.