|
40 litre
engel
power
draw
A little
experiment I preformed in the garage at home monitoring
the draw of our empty 40 litre Engel fridge freezer
running on the camper trailer battery which was hooked
up to a 240volt multi stage charger to provide a
constant power supply. The fridge remained closed for
the test period. No doubt the power consumed would be a
little more if the fridge was opened & items at ambient
temperature were placed in it.
The fridge was
first run at the one & a third setting on the dial,
showing an internal temperature of 2.5 degrees celcius
which was also checked internally with a thermometer.
This is the temperature we usually run when camping.
Once the temperature was stable the test commenced.
On a recent
trip under similar conditions with an overnight
temperature of 10 degrees & 20 during the day, the
Watt's Up Meter showed
the fridge used 10 amp hours over a 24 hour period in
the back of the Jeep. On
another occasion with an overnight temperature of 20
degrees celcius & 30 during the day, the fridge used
20
amp hours over 24 hours under the awning of the camper.
In the garage the fridge was
lowered to the three setting on the dial producing minus
15 degrees running as a freezer to
see just how much more power was consumed. Once again
when the internal temperature was stable the test
commenced. The internal thermometer showed the freezer
was between minus 11 to minus 17 degrees during the test
period.
Having no idea of the outcome I was surprised to see the
fridge used three times the power running as a freezer.
I hope this gives
you a little insight into what the power consumption of
a fridge may be.
|
controlled test
figures |
|
fridge setting on the dial |
fridge temp setting showing |
internal temp with thermometer |
ambient max temp |
ambient min temp |
amp draw |
amp hours over 24 hours |
average amp draw |
| 1.3 |
2.5 |
2.5 |
23 |
13 |
2.5 |
10 |
0.4 |
| 3 |
-12 |
-11.3 |
22 |
11 |
2.5 |
30 |
1.25 |
|
actual figures in
the field |
|
fridge setting on the dial |
fridge temp setting showing |
ambient min temp |
ambient max temp |
amp hours used over 24 hour period |
average amp draw |
run time |
| 1.3 |
2.5
celcius |
10
celcius |
20
celcius |
10 |
0.4 |
one-sixth |
| 1.3 |
2.5
celcius |
20
celcius |
30
celcius |
20 |
0.83 |
one-third |
| 1.3 |
2.5
celcius |
30
celcius |
40
celcius |
40 |
1.6 |
two-thirds |
by Rob
september 2013
|
