Explanation:

Power- Watt (Power is the rate of doing work. It is the amount of energy consumed per unit time)
Energy- Joule (Energy is the strength and vitality required for sustained physical or mental activity)
Potential- Volt (Potential generally refers to a currently unrealized ability. The term is used in a wide variety of fields, from physics to the social sciences to indicate things that are in a state where they are able to change in ways ranging from the simple release of energy by objects to the realization of abilities in people)
Capacitance- Farad (Capacitance is the electrical property of a capacitor and is the measure of a capacitors ability to store an electrical charge onto its two plates with the unit of capacitance being the Farad (abbreviated to F) named after the British physicist Michael Faraday)