Will a Dash Cam Drain My EV Battery? The Truth for BYD, MG, and Hyundai Owners

If you've just dropped $50k+ 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. A 12V battery should never go 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 and your warranty remains intact.

Best EV-Safe Dash Cams for Australian Drivers

The Secret Weapon: Dedicated Dash Cam Batteries

If you want 24+ hours of Buffered Parking Mode, a dedicated dash cam battery pack completely isolates your car's electrical system from the dash cam's power needs.

Final Verdict

Installing a dash cam in your EV isn't just safe - it's essential. 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.