What If Solar Won't Keep Up On a Cloudy Day?

BACK-UP POWER GENERATION FOR TIMES WHEN SOLAR CAN'T MEET DEMAND

At least once a week, a question comes across my computer screen about how to back-up solar power on cloudy days or at times during the year when there just isn’t enough sunshine available. This is not a question about the merits of solar power on a boat. It’s a question about how to create a sensible back-up alternative source of electrical power when …