Dubai-based AMEA Power is developing a 300 MWh BESS alongside its operating 500 MW Abydos PV power plant in Kom Ombo, Aswan Governorate. When first unveiled in September 2024, the project was described as the first to incorporate a utility-scale BESS in Egypt.
[pdf] Incubated at X, the Moonshot Factory (formerly Google [X]), Malta has developed a Pumped Heat Energy Storage (PHES) system to provide long-duration, large-scale, cost-effective, and safe energy storage.
[pdf] Using MOSFET/PWM technology the inverter converts the DC voltage supplied by the batteries to AC voltage of a precise stabilized amplitude and frequency, suitable for most sophisticated electrical equipment. True sinusoidal output waveform with very low distortion (less than 3% for linear loads).
[pdf] 
