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.

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.