Typically they are powered by electricity (like plugged into the wall). So no, however, that electricity may come from solar power.
88 percentage
Solar powered things work when they reflect off the sun. For example, if you have solar power energy it reflects off the sun making energy and then you can use it.
Mainly in factories because their work is constant and they don't need pay or benefits.
Depens on how many hours of sun it gets, on how much you want to drive it, and for how long/fast you want it to go. A solar powered speed boat - no. A solar powered commercial ferry - no. A solar powered dinghy for some casual fishing - sure.
Computers help robots do work faster and more precisely than humans.
no stupid head
Solar powere lights usually require a good deal of sunlight to be powered so it may not work if you do not get much light in your yard.
They do work inside. While it's true that solar powered calculators have trouble in very dim lighting, they will work with almost any light. If it's a healthy level of light for your eyes, it should be enough light to power a solar calculator.
They use power from an internal battery when solar energy is not available.
By using power stored in the batteries
Solar powered may not work on a cloudy day but you will not need to run wirering.
A solar powered heating unit could work on the moon, as there is abundant sunlight available for solar energy generation. However, the extreme temperature variations on the moon may pose some challenges for maintaining consistent heating. Specialized design considerations would be needed to ensure the effectiveness of a solar heating unit on the moon.