Calculate reactive power capability and power factor for PV inverters providing grid voltage support.
Input Parameters
Results
--
Available Reactive
kVAR
--
Required for Target PF
kVAR
--
Current Power Factor
--
Reactive Current
A
Note: IEEE 1547-2018 Category B requires ±0.44 PF capability. Reactive power uses inverter capacity, reducing active power if at full rating.
Reference
Available Q = √(S² − P²)
Current PF = P / S
Required Q = P × tan(arccos(target_PF))
Reactive Current = Q × 1000 / (V × √3)
S = apparent, P = active, Q = reactive