Installation
900-0209-01-00 Rev A 27
Initial Operation
When the PV input circuit breaker is turned on, the FLEXmax 100 automatically detects the PV input
voltage. It then enters the “Wakeup” state (see page 34) and prepares to charge the batteries by tracking
the maximum power point of the PV array.
During the initial tracking, the input PV source is gradually loaded from the open-circuit voltage (V
oc
) to
one half of the V
oc
. Within this range, the FLEXmax 100 seeks the maximum power point. The amount of
time required before starting operation is dependent on the module type, ambient temperature, and the
amount of sunlight directly on the PV array. Normally, the FLEXmax 100 starts in the morning within a
few minutes of the PV array being exposed to sufficient direct sunlight.
Once the controller begins maximum power point tracking, it will enter a three-stage battery charging
cycle. This cycle can be observed with the controller’s LED indicators. (See page 29.) If a system
display is available, it is possible to observe the specific charging stage, mode messages, and readings of
the charge controller.
Resetting to Factory Defaults
To reset programmed items to the factory default settings:
1. Remove all sources of power (PV and battery) from the FLEXmax 100.
2. Press and hold the E
QUALIZE switch (see page 8) while reconnecting battery power.
3. Continue holding the E
QUALIZE switch. After approximately 10 seconds, the STATUS indicator will
blink green rapidly. Continue holding the switch until the S
TATUS indicator begins blinking amber
more slowly. When the resetting process is complete, the FAULT indicator (red) will illuminate.
4. Release the E
QUALIZE switch and disconnect the batteries.
The system display can be used to reset the FLEXmax 100 to its factory default settings. See page 50
for more information.
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