In previous posts, such as my solar powered pond pump pages, I’ve tried to pass on hands-on knowledge of how to build solar circuits. However, I rely on a common foundation of electrical concepts such as voltage, current, resistance, etc. I assume that my readers are familiar with these concepts, but this is not always a valid assumption. This post covers some basic electrical concepts that need to be understood by anyone wanting to work with electrical solar circuits. Each definition below includes links you can follow to get more information on that topic.