Ohm’s Law, Power, and Energy (Topic 1) in Module 2 – Solar-PV-NABCEP-Associate (BG)

Ohm’s Law, Power, and Energy

Most PV electrical calculations boil down to a small set of relationships:

  • Ohm’s law: $V = I × R$
  • Power: $P = V × I$
  • Energy: $E = P × t$ (commonly in watt-hours or kilowatt-hours)

Units

  • Voltage (V)
  • Current (A)
  • Resistance (Ω)
  • Power (W)
  • Energy (Wh, kWh)

The exam often checks whether you can rearrange these formulas and keep track of units.

Topic

Ohm’s Law, Power, and Energy

Compute basic electrical quantities

Ohm’s Law, Power, and Energy

Most PV electrical calculations boil down to a small set of relationships:

  • Ohm’s law: $V = I × R$
  • Power: $P = V × I$
  • Energy: $E = P × t$ (commonly in watt-hours or kilowatt-hours)

Units

  • Voltage (V)
  • Current (A)
  • Resistance (Ω)
  • Power (W)
  • Energy (Wh, kWh)

The exam often checks whether you can rearrange these formulas and keep track of units.