Nerdy Solar Math

WATTS  VOLTS  AMPS

• Terms to know when dealing with Solar are:
• Volts (E) – the difference in electric potential between two points.
• Amps (I) – the flow of an electric charge through a cable.
• Watts (P) – a combination of Voltage and Current as a measurement of Power.
• Solar System capacity is typically specified in Watts.
• Battery capacity is typically specified in Amps.
• Watts = Amps * Volts
• Easy way for me to remember is: P = I * E
• Where P = Power in Watts, I is Amps, and E is Volts.
• Useful Variations include I = P / E and E = P / I
• One Watt Hour (Wh) is one Watt of continuous Power for one Hour.