ExpertPower IVOCH2KW, Руководство пользователя

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Pg. 17
To get a more accurate runtime you must take into consideration the efficiency of
the inverter which is 90%. To do this, take the calculated Energy Consumption of
your appliance and apply it to the equation below:
A
PPLIANCES
R
ATED
W
ATTS
Refrigerator 700W
Heater 1800W
AC
1200W
E
XAMPLE OF
D
UTY
C
YCLES
40%
60%
60%
E
STIMATED
E
NERGY
C
ONSUMPTION
280W
1080W
720W
Example of RV Appliances With Duty Cycles
Appliance Variables
2
Rated
Watts Duty Cycle
Ratio
Energy
Consumption
1200W x 60% = 720W
W x DC% = W
In this example we used the AC with 1200W and 60% Duty Cycle.
*The Duty Cycle in this table is just an example and does not reflect the actual duty cycles of any appliance. Actual
appliance duty cycles can sometimes be extremely varied and thus can only be estimated.
(For a more accurate runtime find the duty cycle or operation habits stated on your appliances’ label.)
Battery
Watt Hours
Energy
Consumption
Appliance
Run Time
1280WH ÷ (720W x 1.1) = 1.6Hrs
WH ÷ (W x 1.1) = Hrs
Efficiency
Rate
NOTE: Efficiency of the inverter also needs to be considered which is 90% when inverting 12V to 110V.
(The Inverter’s 90% efficiency is represented by “1.1” in the equation as Efficiency Rate.)
Duty Cycles:
All appliances have operation behaviors but most commonly run on
a constant wattage consumption. Other appliances function on variables that
change there power consumption. Variables can be environment temperature,
specific conditions, set or automatic functions. These are known as
Duty Cycles
or Power Cycles which is the fraction of a period that the appliance is active.
Simply put, a duty cycle is the ratio of the active time of an appliance in
comparison to the total time period it is in use.