Will a Dash Cam Drain My EV Battery? The Truth for BYD, MG, and Hyundai Owners
If you've just dropped serious money on a BYD Atto 3, Shark 6, MG4, or Hyundai IONIQ 5, the last thing you want is a dash cam causing issues. There's a lot of noise on forums about dash cams draining EV batteries and voiding warranties. Most of it, thankfully, is total rubbish.
The 12V Myth: Your EV has a Normal Battery Too
While the high-voltage (HV) battery drives the wheels, your car still has a standard 12V auxiliary battery. This runs the lights, wipers, infotainment and your dash cam. We err on the side of caution and treat the 12V system with respect.
What Most Blogs Get Wrong
Our Real-World Takeaway: Most generic advice tells you to set your Low Voltage Cut-off lower to 11.6V or 12V. Please don't do this in an EV. Modern EVs with sensitive BMS can throw error codes if the 12V drops that low. As a rule of thumb, do not let a 12V battery sit under 12V.
Will a Dash Cam Void My EV Warranty?
Under Australian Consumer Law, a manufacturer cannot void your entire vehicle warranty just because you installed an aftermarket accessory. They can only refuse a claim if the dash cam or its installation directly caused the fault. Use a proper hardwire kit and tap into the correct, non-critical fuses, so nothing is cut or spliced, which is the thing dealers query most. If you want certainty for your particular car, ask the manufacturer or your dealer in writing before anything is fitted.
Best EV-Safe Dash Cams for Australian Drivers
| Feature | VIOFO A329S | Vantrue N4 Pro |
|---|---|---|
| Coverage | Front and Rear (2-Channel) | Front, Rear and Cabin (3-Channel) |
| EV Advantage | Hybrid Parking (Ultra-Low Power) | Hybrid Parking (Ultra-Low Power) |
| Resolution | 4K 60fps Front / 2K Rear | 4K Front / 1080p Cabin / 1080p Rear |
The Secret Weapon: Dedicated Dash Cam Batteries
If you want extended Buffered Parking Mode, a dedicated dash cam battery pack takes the parked load off your car's 12V system and runs the camera from its own stored charge.
Final Verdict
Installing a dash cam in your EV is well worth doing, and straightforward when it is set up properly. Make sure your installer knows your EV's LV battery specs to set the correct cut-off values and seriously consider a battery pack for peace of mind.
Last reviewed: 19 August 2026. We sell VIOFO, Vantrue and WOLFBOX, so read this as retailer advice rather than an independent test. Camera specifications come from the manufacturers' own published material. The warranty position reflects ACCC guidance at that date and is general information, not legal advice. If anything here is wrong or has gone out of date, tell us and we will correct it.