Hi Richard,
To answer the questions above:
1. No. if the battery is fluctuating at a certain point, the camera thinks the car is being turned on, so is being trigger to turn on. The voltage then drops and the camera thinks the car has been turned off, and so turns off too.
2. The Hard Wire Kit has an in-built voltage cut off which protects the car's battery from being drained below 11.2V.
3. Yes, the CLC has a voltage cut off. Unless your Cigarette Lighter Socket on your vehicle is permanently live (unlikely) then the Cigarette Lighter Socket will only use your car's battery when the car is on. The above is a test to see functionality, and not designed to be a long term fix. We need to ascertain whether the behaviour is in the car, whatever the power supply, or whether it's the Hard Wire Kit.
Finally, yes we have tried to replicate this issue. However when we have had a camera sent to us to test, the camera was found to be without fault.
We do not know of the issue occurring on certain car makes and having a rear camera does not seem to affect the setup.
If you can try the test previously specified, I can help further.
Regards,
Millie
Nextbase Technical Support