Maximum-Power Voltage (Vmp); Standard Vs. Australian Default Settings; Table 6 Default Settings Standard Vs. Australian - Alpha Group OutBack Power FLEXmax Series Owner's Manual

Maximum-Power Voltage (Vmp)

Maximum-power voltage (Vmp) is the operating voltage for the PV array at which the array generates
the most wattage. When designing the PV array, it is recommended for the Vmp to be approximately
12 to 24 volts higher than the nominal battery voltage for optimum performance. This will ensure that
the Vmp is always above the battery voltage, which is required for charging. Higher voltages are not
recommended, as they may reduce the FLEXmax conversion efficiency.
IMPORTANT:
Check the PV array voltage before connecting it to the FLEXmax.

Standard vs. Australian Default Settings

Several version settings are available for the FLEXmax upon initial setup. These can be selected upon
initial power-up. (See page 15.) The English and Spanish versions have the same standard default
settings; however, the Australian version has certain default settings that are different. However, there
are no differences in performance and efficiency between the two versions. The standard and
Australian version can be identified as follows:
Standard Power Up Screen
OutBack
Charge Controller
Figure 101
Table 6
Settings
Charger Absorbing
14.4 V
12 V
24 V 28.8 V
36 V 43.2 V
57.6 V
48 V
60 V 72.0 V
Equalize Equalize Volts
12 V 14.4 V
28.8 V
24 V
36 V 43.2 V
57.6 V
48 V
60 V 72.0 V
01 Hours
Equalize Time
C
900-0009-01-00 Rev
12V
Power
Systems
Standard vs. Australian Power-up Screens
Default Settings Standard vs. Australian
Standard
Float
13.6 V
27.2 V
40.8 V
54.4 V
68.0 V
Australian Power Up Screen
OutBack 12V
Power
Systems
Charge Controller - AU
Australian
Absorbing
14.4 V
28.8 V
43.2 V
57.6 V
72.0 V
Equalize Volts
14.7 V
29.4 V
44.1 V
58.8 V
73.5 V
03 Hours
Applications
Float
13.8 V
27.6 V
41.4 V
55.2 V
69.0 V
99