From Introduction: When the world finally succumbs to Outbreak Level 4, those who are left will have to fend for themselves. After Shelter and Food, Power typically becomes the most important need for the populace, in order to run the basic electronics that provide creature comforts such as heat and entertainment. As they start to rebuild, electronic Power is necessary to run highly valuable pieces of equipment ranging from tools to GPS and cell phones. The strength of the Sun is unlimited and readily available in even the most remote locations; one just needs to harness it.