kW vs kWh vs kW/h Explained: Solar Power Guide for Australians

 If you’ve ever opened your power bill or a solar quote and felt lost in a sea of kW, kWh and even the odd kW/h, you’re not alone. Even people who work around energy every day sometimes mix them up.

For a solar customer in Australia, though, understanding these three little terms is crucial. They affect how big your system should be, how much it can save you, and what you’ll see on your bill once Greenlight Solar has finished the install.

Let’s break it down in plain language, with a focus on how this all plays out in real Aussie homes.

Power vs energy: the core idea

Before worrying about kW vs kWh solar, it helps to separate power from energy:

  • Power is how fast electricity is being used or produced right now.
  • Energy is how much electricity has been used or produced over time.

Competitors like SolarQuotes and Energy Matters both start with this simple distinction because it’s the key that unlocks everything else.

What is the difference between kW and kWh?

kW is power; kWh is energy. A kilowatt (kW) measures how fast electricity is flowing at a moment in time, while a kilowatt-hour (kWh) measures the total amount of electricity used or produced over a period. If a solar system produces 2 kW steadily for one hour, that’s 2 kWh of energy. In short, kW is the rate, and kWh is the total.

This is why your electricity bill is charged in kWh, not kW – your retailer bills you for how much you used, not just how “fast” you used it. Read more: https://www.greenlightsolar.com.au/kw-vs-kwh-vs-kwh-solar-explained/

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