Watts consumed by 120vac to 12vdc charger-converter?

Thread Starter

sdowney717

Joined Jul 18, 2012
648
It has a transformer and is used in the boat to power and charge 12vdc items.
It has a 20 amp continuous rating and the meter can goto 30 amps output.

So how much AC power is this thing typically using if say outputting 10 amps dc power?

Here is it's schematic
 
Last edited:

GopherT

Joined Nov 23, 2012
7,983
Is there a published efficiency rating. If not, assume 70% or so.
From there, 10 amp at 12V is 120 watts.

Efficiency correction, 120W out / 0.70 = 144 W in

144 W at 120 V = 1.4 amps in
 
Top