ByeFO
Gold Member
Posts: 62
Joined: Sat Mar 04, 2017 8:38 am
Delivery Date: 13 Jun 2017
Leaf Number: 407834
Location: Philadelphia area

Dashcam: limits on milliamps of power draw?

Sun Apr 29, 2018 9:08 am

Hi,

I am looking to install a dash cam. I would like to have it hardwired. Is there a limit on power draw by the camera as I shop around?

I saw one (GOLUK T3) that only has a "few milliamp hours" of draw. How much would be too much?

I assume an accessory will draw power from the 12v battery.

Thanks!
Kevin
2013 (4/2013) Pearl White SV LED/QC package
6/13/17: 22,852mi; AHr= 54.13; SOH= 82%

mux
Posts: 145
Joined: Sat Jan 13, 2018 3:52 am
Delivery Date: 13 Oct 2011
Leaf Number: 6177

Re: Dashcam: limits on milliamps of power draw?

Sun Apr 29, 2018 12:19 pm

For all practical purposes: no. The 12V accessory slot is fused at something more than 10A (I can draw 120W for a little inverter no problem) and 99% of dashcams are supplied with a 12V to 5V USB adapter that goes into the accessory slot to actually provide power to the camera. No camera on the market uses more than a couple watts, so you will never run into power issues with a dashcam. The car can support orders of magnitude more power.

That being said, if you intend on using the USB port (in the 1st gen Leaf) directly, that one is effectively limited at about 400-500mA. You will run into trouble with some more modern battery-backed dashcams that draw up to an amp when charging the battery. But again, that is easily fixed by using the accessory port and a USB adapter.

The accessory port is turned off when the car is off, so you run no risk of draining the battery when the car is off. Note that some cameras offer 'parking mode' or 'surveillance mode' recording, which means the dashcam keeps recording even if the car is off. This is done by using a battery inside the dashcam, not power from the car.

ByeFO
Gold Member
Posts: 62
Joined: Sat Mar 04, 2017 8:38 am
Delivery Date: 13 Jun 2017
Leaf Number: 407834
Location: Philadelphia area

Re: Dashcam: limits on milliamps of power draw?

Mon Apr 30, 2018 11:07 am

Thanks!
2013 (4/2013) Pearl White SV LED/QC package
6/13/17: 22,852mi; AHr= 54.13; SOH= 82%

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