Emonlib readings is incorrect!

hi i have problem that i am using ACS712 20A current Sensor ZMPT101B voltage sensor directly connected to arduino

i changed the calibration as follow

emon1.voltage(A1, 580, 1.7); // Voltage: input pin, calibration, phase_shift
emon1.current(A0, 9.5); // Current: input pin, calibration.

v rms and I rms is right but real power and pf is not correct ( not equal to my wattmeter reading ) !!!

if any one can help >. please mail me
[email protected]

This is a cross-posting.

EmonLib is not incorrect, it is most likely your calibration that is wrong.