Wind Turbine

Wind Turbine produces 12W of Power, but only when it's windy. If there is no wind, it won't produce anything at all.

Strategy
Wind levels depend on current weather of the planet. Some planets have windy weathers most of the time (and would be optimal for Wind Turbine), while others are almost devoid of wind. You can use GPS feature of your Tricorder to check all possible weathers (and their probabilities) of the planet you are currently on.