I'm considering purchasing one that can monitor for bumps while parked, after having some person dent my near-new Leaf and then just leave. Any recommendations on installers around the North Shore area?
See above - my BlackVue 750s setup does this, though there are certainly other (cheaper) solutions that will do this as well.
PowerConnect box means that it won't drain the battery when it is running. Recording capture is based on G sensor motion for bumps and or proximity/movement when things get close to the front or rear of the car.
Would work really well for events occuring in front and back, but even if someone smashed your door hard enough to mark, it should get picked up and saved and you would hopefully capture the miscreant departing along with their face and rego!
Edited to add - Alex @ Drivercam.co.nz is North Shore based and comes highly recommended.