1 VA (Volt-Ampere) is equal to
1 Watt (W) only if the power factor (PF) is 1, meaning the load is purely resistive.
In general:
\[
\text{Watts} = \text{VA} \times \text{Power Factor (PF)}
\]
Where:
- VA (Volt-Amperes) represents apparent power (total power in the system).
- Watts (W) represents real power (actual useful power consumed by the load).
- Power Factor (PF) (between 0 and 1) accounts for how efficiently the power is being used.
For example:
- If PF = 1 (purely resistive load): 1 VA = 1 W
- If PF = 0.8 (typical inductive load): 1 VA = 0.8 W
So, the actual wattage depends on the power factor of the system.