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lozanoleeSep 9, 2025
What does 'Shorted RTS' mean on my OutBack Power FLEXmax 100 Controller?
- EEdward ParkerSep 9, 2025
A 'Shorted RTS' message indicates that the Remote Temperature Sensor (RTS) is damaged. To test, remove or replace the RTS.
What does 'Shorted RTS' mean on my OutBack Power FLEXmax 100 Controller?
A 'Shorted RTS' message indicates that the Remote Temperature Sensor (RTS) is damaged. To test, remove or replace the RTS.
What to do if OutBack Power Controller unit does not power up upon initial connection?
If your OutBack Power Controller unit doesn't power up, check the battery connection and polarity, ensuring it's properly connected. Also, inspect the battery circuit breaker or device to ensure it's appropriately sized. Confirm the battery voltage at the FLEXmax 100 terminals, as a voltage below 15 Vdc may prevent power-up. If a rapid shutdown device caused this, reset the external rapid shutdown device.
What does it mean when my OutBack Power Controller displays 'VOC Too High'?
If the open-circuit voltage (Voc) is too high, the FLEXmax 100 cannot safely operate. The controller will automatically restart operation once the Voc decreases to a safe level. You should also check the controller temperature.
What to do if my OutBack Power FLEXmax 100 is in over current fault?
An over current fault occurs if more than 80 amps flow from the battery to the FLEXmax 100, or if more than 120 amps flow from the controller to the battery. To restart the FLEXmax 100, remove all power from the controller and then reconnect the batteries.
What to do if my OutBack Power Controller shows a GFDI Fault?
A GFDI Fault indicates a ground fault where the detection circuit has sensed an open connection on the GFDI fuse. Check the fuse and make certain it is installed according to the instructions.
Why is my OutBack Power FLEXmax 100 not operating, but had worked normally before?
This behavior can be normal in cases of low light. Confirm conditions and behavior using Table 4 on page 34. It could also be due to a battery temperature fault, so check the temperature. Also, a rapid shutdown condition may cause this, so try resetting the external rapid shutdown device.
What to do if no LED indicators illuminate when pressing RESET button while connecting battery to OutBack Power FLEXmax 100?
If no LED indicators illuminate when pressing the RESET button while connecting the battery, there may be a problem with a file on the microSD card. Disconnect the battery and try connecting it three or four more times.
How to test Battery Calibration setting on OutBack Power FLEXmax 100 Controller?
The system display will not report this setting if remote battery sensing is connected. To test this function, temporarily disconnect remote battery sensing.
What does it mean if my OutBack Power FLEXmax 100 Controller displays 'Over Temperature'?
An 'Over Temperature' message indicates a high temperature fault. Check the controller temperature (see page 38).
What to do if my OutBack Power Controller displays 'Fault Input Active'?
A 'Fault Input Active' message indicates a deliberate action due to a rapid shutdown condition, which is not a controller error. Resetting this condition requires resetting the external rapid shutdown device.
General| Maximum PV Input Voltage | 150 VDC |
|---|---|
| Maximum Charge Current | 100 A |
| Maximum Output Current | 100 A |
| Efficiency | 98% |
| Operating Temperature | -40°C to +60°C |
| Battery Voltage | 12 VDC |
| Communication | RS-232 |
| Protection | Overvoltage, Overcurrent, Short Circuit, Reverse Polarity |
Covers essential safety precautions for operating the equipment.
Provides instructions and requirements for connecting the charge controller to the system.
Explains grounding requirements and methods for system safety.
Describes the internal GFDI circuit and its function for fault protection.
Specifies correct wire gauges and cable ampacities for system connections.
Outlines the step-by-step procedure for powering on the charge controller.
Explains how to restore the controller to its original factory settings.
Details fault conditions, error messages, and troubleshooting steps.
Presents the menu hierarchy for configuring settings via the MATE3S display.
