@The_Machine The previous answers are correct regarding the 3 options:
1. PoE+ switch
2. PoE+ injector
3. Low voltage power adapter (the "eye patch" or "hockey puck")
Since you do not have PoE available outside the house, the options would be to deploy an Ethernet switch with PoE+ ports, or a less expensive option of deploying a PoE+ power injector, or leveraging the low voltage power adapter.
If you have a way to extend your home LAN with a piece of Cat6 cable to where the MV camera will be mounted, a cheap 30W PoE+ injector might be the easiest and least expensive way to go here. Make sure to get a 30W injector, not a legacy 15W adapter, the outdoor MV72 and MV72X have integrated chassis heaters and want/need to see more than 15W to become operational.
If you don't have a way to run an Ethernet cable from the camera all the way back to your home LAN/switch equipment, they you can still use a PoE+ injector in the area of the camera to power it, you would simply need a place to plug the injector into AC power and then run a piece of Cat6 from the injector to the camera, and you would just not have a cable running back from the injector to your home LAN. The camera would then connect wireless back to your wifi, so long as it's within range.
The low voltage power adapter can be powered via 12 VDC or 24 VAC. (Yes, car battery included although I'm not sure if it's officially supported. 😀 See the slide attached below. This shows a typical siamese video/power cable that might be used in a legacy analog deployment, and instead of ripping and replacing cable (which can be very expensive compared to the cost of the adapter) you abandon the coax cable and use the low voltage power to run the adapter, and then just need a Cat6 jumper cable from the adapter to power the camera, and again the camera powers up and connects back via wireless for data/video.
So if doing this in the home, I'm guessing you may not have 12VDC or 24VAC readily available, unless you might have already had analog cameras deployed. If not, wouldn't make much sense to use a transformer just for the sake of using the LV adapter to then power the camera, and I'd fall back to the PoE+ power injector as the simplest and cheapest option.
Note that to use wireless on the cameras, regardless if using a power injector or LV adapter, the camera needs to be connected via a wired connection first in order to be configured with the wirelsss SSID parameters. It requires you to configure BOTH a primary and backup wireless SSID. If you only have one SSID at home, then perhaps consider configuring the hotspot on your cell phone as the backup.
Here is the installation guide for the low voltage power adapter:
Here is the MV wireless config guide:
Hope that helps!