How many watts does a plugged in MBP use?

[KoolAid-Drink]

I'm trying to be as frugal as possible with my electricity, so when a fully charged laptop is plugged in (ie, overnight or while I'm out at work), how many watts is it eating up?

This applies to both the 2-prong and 3-prong chargers.

Thanks!

 

[Falhófnir]

I'm trying to be as frugal as possible with my electricity, so when a fully charged laptop is plugged in (ie, overnight or while I'm out at work), how many watts is it eating up?

This applies to both the 2-prong and 3-prong chargers.

Thanks!

What model? At most, it will be drawing the wattage that the charger is rated for (so 87W for the 15” touch bar MacBook Pro, for example).

0.087 kilowatts Times by 24 hours means 2.088kWh per day... less than a fridge and that’s when the computer is at max draw too! At about 14p per kWh, it’s literally pence per day...

 

[KoolAid-Drink]

What model? At most, it will be drawing the wattage that the charger is rated for (so 87W for the 15” touch bar MacBook Pro, for example).

0.087 kilowatts Times by 24 hours means 2.088kWh per day... less than a fridge and that’s when the computer is at max draw too! At about 14p per kWh, it’s literally pence per day...

rMBP 2015, 13 inch.

I guess the question I'm asking is, is it worth unplugging the charger to avoid "vampire" electricity use, when the laptop is fully charged?

 

[Falhófnir]

rMBP 2015, 13 inch.

I guess the question I'm asking is, is it worth unplugging the charger to avoid "vampire" electricity use, when the laptop is fully charged?

Considering it’s pence per day anyway, the cost would be negligible - I wouldn’t leave it plugged in all the time personally, however, as that’s not very good for the battery.

 

[jerryk]

Full charged and plugged in. In those conditions likely 1-10 watts. You are not using the machine so the only power needed will be to top off the battery which might 1% of the batteries 94 watts, or in worse case, lots of strange badly coded apps pulling power 10%.

 

[Weaselboy]

I'm trying to be as frugal as possible with my electricity, so when a fully charged laptop is plugged in (ie, overnight or while I'm out at work), how many watts is it eating up?

This applies to both the 2-prong and 3-prong chargers.

Thanks!

https://www.apple.com/environment/p...ch_MacBookPro_w_Thunderbolt3_PER_June2017.pdf

Here is the info for the 13" MBP from Apple's PDF link above.