This is a good basic. Bright light and hand cranking are the keys here, plus no batteries or bulbs to replace. Perfect for bug out bag and home use, inexpensive enough to buy two.

With the electric grid destroyed or disabled following an EMP attack, batteries will be one of the only available sources of power. This solar-powered battery charger will allow you to continue using your battery-powered devices (flashlights, radio, tools, etc.) long after the grid has gone dark.

A less portable kit—provides 60 watts of power. Not a lot of power, but should power more lights and tools. If additional power is desired, two or more kits can be used together.

Not always easy to find locally, and very useful when constructing a Faraday cage.