They are defined in IEC 61724-1:2021 and are used by asset owners, operators, and independent engineers to detect underperformance, benchmark plants, and fulfill contractual obligations. Two primary indicators are in common use: Performance ratio (PR) and Energy performance index.
This could be caused by the DC rotary isolator being switched off, connectors from positive and negative cables being disconnected or the DC cables severed. Check if your inverter is still within its warranty. If so, contact the company about the fault.
The Carbon Negative Shot is part of the DOE's Energy Earthshots effort, which aims to accelerate breakthroughs of more abundant, affordable, and reliable clean energy solutions within the decade.