There's 2 important measures of a battery storage system. How much power can it give you (kw) and how much energy can it store (kwh) when it is full, which tell

There's 2 important measures of a battery storage system. How much power can it give you (kw) and how much energy can it store (kwh) when it is full, which tells you how long it will last. Articles like this seem to jump between the 2, not realising they are different things.