My husband just went through the process of wiring a back-up camera into one of our older SUVs. It was quite the process, so the possibility of doing the same to our significantly older truck was a hard no.
This magnetic solar wireless camera from MROACE was an amazing find. I'm not the tech savvy person in the family, so being able to set it up and get it up and running by myself is a testament to how easy it is to work with.
Our biggest concern was the strength of the magnet--would it hold while driving or would it fall off if we hit a bump or pothole? It is incredibly strong. It takes both hands and muscle strength to dislodge it from the tailgate.
The picture quality of the monitor is also impressive. My taking photos of what is on the monitor doesn't do it justice. In case anyone has the same misperception as I did, the monitor requires power at all times (unlike the camera).
As for the camera, it charges quickly via the USB-C cable. However, it is noteworthy that the manual mentions the solar charging isn't intended to charge and keep the camera charged. It is to extend the life of the battery.
Recording occurs automatically when the camera/monitor is turned on and is stored on included memory card. You have to manually stop the recording (I haven't been able to find any mention to stop this as an auto function). Individual recordings can't be erased from the monitor. You have to reformat the memory card which erases everything.
Overall, this is a great camera and it will have so many more uses than just a backup camera.