scope:

This document gives requirements for the product specifications of inverters for grid connected Distributed Energy Resources (DER) for single phase or multi phase connections feeding up to 25 A per phase into the utility low voltage grid. The inverters are intended for long-term operation indoor, (conditioned or unconditioned) or outdoor in general open-air climates as defined in IEC 60721-2-1 (protected or unprotected). The document addresses inverters in all kind of DER systems such as Photovoltaic (PV) systems, small wind turbines or Combined Heat Power (CHP) systems. The CHP systems may be based on a fuel cell technology or on Stirling engine or any other technology.