What is the difference between kW and kWh?
kW is power, kWh is energy. The difference determines what a charge point or home battery can do at any given moment, and for how long.
kW (kilowatt) is power: how much electrical power is being delivered or drawn right now. kWh (kilowatt-hour) is energy: power multiplied by time.
A charge point that charges at 11 kW for one hour delivers 11 kWh to the car. A 10 kWh home battery with a 5 kW inverter can therefore release that energy over roughly two hours.
Why this matters when you get a quote
For a home battery, capacity (kWh) determines how much you can store, while power (kW) determines how fast you can charge or discharge. A large battery with limited power cannot always cover your peak demand.
For a charge point and the consumer unit, it's the other way round: the available power of your grid connection determines what you can use at the same time.
Further reading
Advice for your own situation
General explanations help, but your home or building is specific. We're happy to work through your situation in concrete terms.