Morningstar ProStar MPPT Series, Инструкция по установке, эксплуатации и обслуживанию, Страница: 25 / 45

Operation ProStar MPPT Operator’s Manual 45
44
4.0
Shared Settings Value Units
Absorption Extension Voltage 12.50 Volts
Absorption Extension Time Absorption Time + 30 minutes
Float Exit Time-out 60 minutes
Float Cancel Voltage 12.10 Volts
Equalize Time-out Equalize Time + 60 minutes
Temperature Compensation Co-efficient - 30
millivolts / °C
/ 12V
Table 4.2. Battery settings that are shared among all battery types
The ProStar MPPT provides seven (7) standard battery
charging settings that are selected with the settings switches
(see Table 4.1 above). These standard charging settings
are suitable for lead-acid batteries ranging from sealed
(gel, AGM, maintenance-free) to Flooded and L-16 cells.
In addition, an eighth charging setting provides for custom
set-points using MSView
TM
PC software. Table 4-1 above
summarizes the major parameters of the standard charging
settings. The shared settings in Table 4-2 are common to
all battery types. The following charging profiles graphically
illustrate the shared settings:
Absorption Extension
1:00 2:00 3:00 4:00 5:00 6:00
12.50 V
Bulk
Extended
Absorption
Float Absorption
Absorption Extension Voltage
time (hrs)
Figure 4-3. Absorption Extension Charging Profile
If battery voltage discharges below 12.50 volts (25.00
volts @ 24V) the previous night, Absorption charging will
be extended on the next charge cycle as shown in figure
4-3 above. Thirty minutes will be added to the normal
Absorption duration.
Float Time-out
1:00 2:00 3:00 4:00 5:00 6:00
Float V
Bulk Float
Sub-
Float
Absorption Absorption
60 mins.
below Float
time (hrs)
Bulk
Figure 4-4. Float Exit Time-out Charging Profile
After entering Float stage, the controller will only exit Float
if the battery voltage remains below Float voltage for sixty
cumulative minutes. In figure 4-4, a system load turns on
at 3:30 hrs when the controller is in Float stage, runs for
one hour, and turns off at 4:30 hrs. The load current draw is
larger than the charge current, causing battery voltage to
drop below Float voltage for sixty minutes. After the load
runs for sixty minutes, the time-out causes the controller
to return to Bulk charging, and then Absorption stage
again. In this example, a load runs continuously for sixty
min. However, because the Float exit timer is cumulative,
multiple momentary load events that pull the battery
voltage below Float voltage for a combined sixty minutes
duration will also force an exit from Float stage.