Think you're off there mate. You're assuming the sun shines 24 hours a day, producing 5*600watts = 3000watts * 24hours = 72kilowatt-hours in the full 24 hours of sun. Actual solar production will vary but I promise it won't happen all day long
-72 KWH in just one day if calculated at 3000 watts? isn't this too high electric consumption when it happens to you in your actual life dude? Even half of 72KWH is still big in my opinion.
If anything, you probably have an idea about the pros and cons of solar power so you have the courage to ask such things.