I made a DIY solar system including a batteries and a pure sine-wave inverter, and I wanted to increase the power factor (which is typically 0.6 ~ 0.8) with a laptop power adapter load.
After calculating the right capacitor value, I tried to connect a 1.5µF in parallel to increase the power factor; unfortunately the power factor was actually decreased.
On the other hand, when I connect a fan containing an induction motor, the power factor goes above 0.9!
I don't get why this happens.
By the way, I don't have an oscilloscope.