Hello, we are young boys wondering: How much energy is required from the solar cells to heat up your coffee? P.S have

Question: Hello, we are young boys wondering: How much energy is required from the solar cells to heat up your coffee? P.S have you ever done so?
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Asked by jerryfabode to Matthew on 17 Jun 2013.
- Matt Carnie answered on 17 Jun 2013:
  
  I’ve never done it but lets do the maths!
  
  It takes about 0.09 kWhr of electrical energy to boil one litre of water. If the cells I’m using are 10% efficient and the power of the sun is 1 kW/m2 then our cell output is 0.1 kW/m2. If we wanted to boil the water in 5 minutes then we’ll need 1.08 kW of power and so we will need a solar panel of 10m2!
  
  That’s quite a large solar panel but then boiling water requires quite a lot of energy!

Question: Hello, we are young boys wondering: How much energy is required from the solar cells to heat up your coffee? P.S have you ever done so?