Renewable energy — heat pumps, solar PV

What you'll learn

1. 1

   Imagine a heat pump as a fridge working backwards — it takes heat from outside and moves it inside your home.

2. 2

   Where does a heat pump get its heat from?

3. 3

   See a simple heat pump cycle — drag the refrigerant through the pipes to see how heat moves.

4. 4

   Let's work out how much heat a heat pump delivers compared to the electricity it uses.

5. 5

   If a heat pump uses 2 kWh of electricity and delivers 8 kWh of heat, what is its CoP?

6. 6

   Solar PV panels turn sunlight directly into electricity — no moving parts, just pure sunshine power.

7. 7

   Drag to arrange 4 solar panels on a south-facing roof — the best direction in the UK.

8. 8

   What does 'PV' stand for in solar PV?