In an island mode, the ZenergiZe units can be used as a standalone source of power. The modular unit can be used in a 3ph connection or in a single phase. A typical application of energy storage systems in island mode would be a small event in a city center, where the unit is needed to power low loads, such as lighting and music devices, and where emissions and noise need to be limited. When combined with a renewable source to produce the energy needed, such as solar panels or a wind turbine, running the ZenergiZe units in an island mode can reduce CO2 emissions by up to 100 percent, resulting in a completely sustainable solution.