S.L. 545.24 Art. 19AEnergy storage facilities.

An energy storage facility operated in parallel with the electricity distribution system shall include an interface protection system:

(a) that complies with the Network Code; and

(b) which, unless the Network Code provides otherwise, complies with MSA EN 50549-1 or an equivalent standard thereof when so considered by the Standards and Metrology Institute within the Malta Competition and Consumer Affairs Authority;

(c) which shall be provided with backup equipment when designed to operate in backup operation mode which backup equipment shall use hardware that physically breaks the connection with the distribution system. Solid state relays or other semiconductors which break the connection are not permitted. Provided that the protection of the internal electrical installation shall remain functional also when supplied through the energy storage facility operating in backup operation mode. The interface protection system in all cases shall automatically disconnect from the distribution system in the event of loss of the supply from the distribution system, and/or deviation of voltage and/or frequency from normal supply conditions.

(d) which has appropriate signage indicating the presence on the premises of an energy storage facility equipped with backup operation mode function.