I.R.I.S. QP-1800 - Manual (Page 17)

QuietPower 1800 Inverter Owner’s Manual Rev 15 OCT 01 Page 17
10.2. Efficiency Curve
The efficiency rating of the QuietPower inverter indicates what percentage of DC power is converted to
usable AC power at given power output levels. The higher the rating, the less power is lost in the way of
heat from the inverting process. QuietPower Inverters have an extremely flat efficiency curve over much
of their operating range so less battery power is wasted, whether operating at low power levels or higher
power levels.
Efficiency (%) and Heat Dissipation (W)
80
81
82
83
84
85
86
87
88
89
90
0 200 400 600 800 1000 1200 1400 1600 1800
Output Power (W)
E
fficiency (%
)
0
50
100
150
200
250
300
H
eat D
issipation (W
)
Figure 5. Efficiency (%) and Heat Dissipation (W).
Output Power (W)
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0 10 20 30 40 50 60
Ambient Temperature (C)
Ou
tp
u
t P
o
wer
(W
)
Figure 4. Output Power (W) Derating Curve.