Outback Power Systems FlexMax 60 User Manual page 75

• Are the batteries charged? Is the Charge Controller in the Absorbing or Float stage? If either case
is true, the Charge Controller will produce enough power to regulate the voltage at the ABSORB
or FLOAT set point voltage, therefore, requiring less power in these modes.
• What is the short circuit current of the PV array? Use a multi-meter to determine if a short circuit
current is as expected. There might be a loose PV array connection.
• If the PV array voltage is close to the battery voltage, the panels could be warm/hot causing the
Maximum Power Point to be at or lower than the battery voltage.
• Is it in U-Pick mode?
Charge Controller is not equalizing
• Has the EQ cycle been initiated?
- In the EQ Menu, press START to begin process. When the EQ cycle has been initiated,
EQ-MPPT will be displayed.
• The EQ cycle has been initiated, but the battery is not equalizing.
- The EQ cycle will begin when the target EQ set point voltage has been reached. A small
array or cloudy weather will delay the EQ cycle. Accordingly, running too many AC and/or
DC loads will delay the EQ cycle, too.
• An EQ set point that is too high relative to the battery voltage will delay the EQ cycle.
• If the PV array voltage is close to the battery voltage, the panels could be warm/hot causing the
Maximum Power Point to be at or lower than the battery voltage which can delay the EQ cycle.
Charge Controller Battery Temperature Compensated Voltage
• Only the OutBack RTS (remote temperature sensor) can be used with the Charge Controller.
• The battery voltage can rise above the ABSORBING and FLOAT voltage set points if the battery
temperature is < 77°F or fall below the ABSORBING and FLOAT voltage if the battery temperature
is > 77°F.
• Why does the Charge Controller show BatTmpErr on the STATUS screen?
- The RTS is faulty or damaged. Disconnect the RTS from the RTS jack to resume
normal operation.
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