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SOLAR SYSTEMS- a type of circuits

Discussion questions:

a) Are you interested in solar energy?b) Do you think buying solar panels is a good investment for a house?c) Do you think cars will run from solar energy in the future?d) Is solar energy the best form of renewable energy?e) Which gadgets would you like to run on solar energy in the future?

1. Listen and label the diagram

2. Listen and match the items with their specifications

answer1. Solar panel a. 12V 8 W

2. controller b. DC

3. battery c. 5A

4. lamps d. 60W

5. electrical current e. 12V 100Ah

SOLAR SYSTEMS- a type of circuits

3. Look at the diagram again. Where does the current flow if the sun shines and the lamps are on?

4. Read the text and explain in Spanish/Catalan what happens

a) When the sun shines and the lamps are off

b) The sun doesn’t shine and the lamps are on.

SOLAR SYSTEMS- a type of circuits

5. FIRST CONDITIONAL

6. How does a controller work?

If the battery is full, switch A (1) ________________________ (open / close). Then the current (2) ______________________ (flow/ not flow) from the panel to the battery. The controller short-circuits the panel.

If the battery is empty, switch B (3) __________________________(open/close). Then the current ____________________________ (flow/ not flow) from the battery to the lamp.