Hi, new to this forum and not sure this section is for the Outlander PHEV?
I've had the car for only 3 days.
The electric range should be about 50km according to the specs. The first day the meter showed a range of 50km when fully charged, and that's what I could drive.
She second and third day it showed 30km, and I didn't get further.
Same charger and outlet, charged all night, and when the car starts it says "Charge complete".
Why is this?

 

The meter is only an estimate of your range, and it bases its number on the previous driving conditions. So it will change depending on how you're driving and whether you're using the climate control, which decreases the range.

You should join the PHEV owners group on Facebook. There's not much PHEV-specific info in this forum.