8
PB
. BATTERY TEMPERATURE COMPENSATED VOLATGE SET POINT
The temperature of a battery has an impact on the recharging process—in higher ambient tempera-
tures, the regulation set points (
Absorb
and
Float
) need to be reduced to prevent overcharging of
the batteries. In lower ambient temperature conditions, the voltage regulation set points need to be
increased to ensure complete recharging of the batteries.
The default charger settings of the FLEXmax 80 are based on typical lead acid battery systems.
Always
ensure the Absorb and Float voltage regulation set points are set to the recommended battery manufactur-
er’s recharging regulation voltages.
Non-Battery Temperature Compensated System
If a battery remote temperature sensor is not available the
Absorb
and
Float
voltage regulation set
points can be adjusted for the expected weather conditions. The following table shows the appropri-
ate adjustments for both
Absorb
and
Float
voltage regulation set points for weather conditions above
or below 77˚F / 25 C
EXPECTED TEMPERATURE
ADJUST SET POINT
V
V
8V
Average = 95˚F / 35˚C
Subtract
0.30V
0.60V
1.20V
Average = 86˚F / 30˚C
Subtract
0.15V
0.30V
0.60V
--------------------------------------------------------------------------------------------------------------------------------
Average = 68 F / 20˚C
Add
0.15V
0.3 V
0.60V
Average = 59˚F / 15˚C
Add
0.30V
0.60V
1.20V
Battery Temperature Compensated System
A battery remote temperature sensor (RTS) will
automatically
compensate the
Absorb
and Float
voltage
relative
to the
Absorb
and
Float
set points in the
Charger
menu. Please reference page 49 of
this manual for adjusting the upper and lower battery compensated limits.
Battery temperature compensation with other slopes
The FLEXmax 80 uses a 5mV per degree C per cell (2V) compensation slope required by UL. For other
slopes, you may be able to pick a different battery voltage and change the charger
Absorb
and
Float
voltage settings to achieve a more or less aggressive slope. If going lower in voltage, reduce the
Float
voltage first, since the
Absorb
voltage will not be adjustable below the
Float
voltage setting. If going
higher in voltage, increase the
Absorb
setting first before raising the
Float
voltage above the present
setting. Here is a table of FLEXmax 80 compensation based on system voltage for reference:
12V system -30mV/degree C
24V system -60mV/degree C
36V system -90mV/degree C
48V system -120mV/degree C
60V system -150mV/degree C
Содержание FLEXMAX 80
Страница 9: ...THE OUTBACK POWER SYSTEMS FLEXmax 80 Maximum Power Point Tracking Charge Controller...
Страница 13: ...12 Figure 2 Single Charge Controller wiring diagram with 24 volt PV array...
Страница 14: ...13 Figure 3 Charge Controller Wiring Diagram with an FX HUB 4 and an RTS...
Страница 15: ...14 Figure 4 Charge Controller with PV array ground fault protection wiring digram...
Страница 37: ...36 Figure 5 Diversion Load and AUX Wiring Set Up Illustrated...
