Dashcam parking battery affext range of ev?

[chriz1]

Hi all,

I have a blackvue dashcam and separate lifepo4 battery that is charged when vehicle is running via hardwired piggyback 12v fuse so I get parking mode for a good 12 hrs when charged which takes about 40mins to get to full charge.

I recently fitted it to my ev but cant help think what affect if any this will have on the range?
My car has an useable ev battery size of 70kwh. The specs on the lifepo4 battery says input 11.5v -32v / 10amps max
Any ideas ?

[Mammasaid]

What's the max power of this device - input 11.5v -32v / 10amps?

The maximum power of this device is 320 Watts.

This is calculated using the electric power formula (Power = Voltage × Current) at the maximum input limits:

• Maximum Voltage: 32V
• Maximum Current: 10A
• Calculation: 32V × 10A = 320W

(Note: At the minimum input voltage of 11.5V, the maximum power draw would be 115W).


How long would a device using 320 Watts take to use a 70 Kwh battery?

A device continuously drawing 320 Watts would take 218 hours and 45 minutes (218.75 hours) to completely deplete a 70 kWh battery, assuming perfect efficiency.

[Blib]

I had a Nextbase 312GW dash cam hardwired to my Kia Soul for three years. It worked well and the car's 47kwh and 12v batteries survived.

[chriz1]

Mammasaid said:

What's the max power of this device - input 11.5v -32v / 10amps?

The maximum power of this device is 320 Watts.

This is calculated using the electric power formula (Power = Voltage × Current) at the maximum input limits:

Maximum Voltage: 32V
Maximum Current: 10A
Calculation: 32V × 10A = 320W

(Note: At the minimum input voltage of 11.5V, the maximum power draw would be 115W).


How long would a device using 320 Watts take to use a 70 Kwh battery?

A device continuously drawing 320 Watts would take 218 hours and 45 minutes (218.75 hours) to completely deplete a 70 kWh battery, assuming perfect efficiency.

Thanks so hardly any effect then

[Mammasaid]

chriz1 said:

Thanks so hardly any effect then

Yep, non-EV drivers seem to think that turning on any electrical equipment in an EV immediately decimates the range. Actually it makes very little difference to the range.

[fooman]

Keep in mind that most EVs use a 12v battery to power low voltage system with main battery disconnected, so dashcam will be drawing power from 12v not the big battery. It depends on EV system as to when the 12v is recharged, some are clever enough to do it when the 12v gets low, others only when car is driven as the big battery is otherwise isolated.

[98elise]

Mammasaid said:

What's the max power of this device - input 11.5v -32v / 10amps?

The maximum power of this device is 320 Watts.

This is calculated using the electric power formula (Power = Voltage × Current) at the maximum input limits:

Maximum Voltage: 32V
Maximum Current: 10A
Calculation: 32V × 10A = 320W

(Note: At the minimum input voltage of 11.5V, the maximum power draw would be 115W).


How long would a device using 320 Watts take to use a 70 Kwh battery?

A device continuously drawing 320 Watts would take 218 hours and 45 minutes (218.75 hours) to completely deplete a 70 kWh battery, assuming perfect efficiency.

Thats charging, not draw. He said it takes an hour to charge, and will run for 12 hours.