Minimum Solar Power needed for LED lights and Water Pump

We haven’t plugged in the converter since we got a 100 watt panel several years ago. Perfect solution. I don’t understand why it is considered necessary to have more solar collector watts when getting another battery. Surely the extra battery decreases the need for more power because more energy can be saved for the rainy day.

You will need the second solar panel if you use a microwave oven or television.