The Solar Kettle works brilliantly in the UK climate. It works best in direct sunlight, but will still work effectively in diffused light, so it can make hot water (not boiling) even on cloudy days.
Answer
One thing to remember is that the azimuth and latitude you are in is important, please see this diagram to help you set up your solar kettle.
It would be so great to have a solar powered IPad charger!
