Alpha Group OutBack Power FLEXmax Extreme Series, Owner'S Manual

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900-0150-01-00 Rev A
23
Status and Information
LED Indicators
Figure 19 LED Indicators
The FLEXmax Extreme charge controller has no graphical display. It is equipped with four LED indicators that
show the charge controller’s condition.

The top LED, the Charge indicator, is blue. It illuminates when more than 10 watts of PV power is available.
It is solid when bulk or equalization charging. It flashes when absorption or float charging. The MATE3
system display represents these stages as operating modes in the Status menu. See page 30 for a list of
modes. See page 71 for a description of charging stages.
The Charge indicator will not turn solid if less than 10 watts of PV power is available. It will flash in
constant-voltage charging regardless of how much PV power is available. Note that in some cases it may
illuminate when power is available but the controller is not charging. (See Table 4 on page 28.)
This indicator will flash while performing firmware updates to the FLEXmax Extreme (see page 46).

The second LED down is the Status indicator. It is a tri-color LED which can be red, green, or amber. This
LED is used to indicate either battery voltage or charger status. See Table 2 on page 24.
The following patterns usually indicate particular charging stages.
~ The indicator turns amber (a combination of the red and green colors) if the batteries are equal or
greater than 1.91 volts per cell (Vpc). This often accompanies Bulk or Absorption stage.
~ It turns green upon entering the Float stage. It will remain green regardless of the battery voltage until
it falls below 2.08 Vpc. This will trigger a new charge cycle.
~ It will alternate amber/green during equalization. It can also flash amber/red. (See pages 27 and 72.)
Charging Indicator — Blue LED
Status Indicator — Green/Red (or Amber) LED
AUX Indicator — Yellow LED
Fault Indicator — Red LED