One of the main differences in these models is how much charging “juice” they can store, referenced in watt-hours. Watt-hours are a measure of a unit of energy (watts) that can flow over time (hours). Consider.
[pdf] Unlike your smartphone battery that dies during video calls, Doha Electric’s storage solutions use liquid metal battery technology that laughs in the face of 50°C heat. Here’s the kicker: their latest 500MW installation at Al Kharsaah Solar Park can power 160,000 homes for 6 hours after dark.
[pdf] NamPower, Namibia's state-owned power utility, has signed a contract with a Chinese joint venture to build the first utility-scale battery energy storage system (BESS) in the country and the Southern African region.
[pdf] 
