DC/Solar Battery Charger
Part No. IDC25 / IDC45
Before beginning your diagnosis
We recommend scrolling down and familiarising yourself with our diagnosis checklist and key measurement values.
A multimeter and an understanding of how to use it, is crucial for an accurate fault diagnosis of your IDC25/IDC45. You will need to be able to check voltages, current and continuity.
Select which LED indicators are active
Before you begin your fault diagnosis, there are a few things to remember about your DC Solar Charger (IDC25/IDC45) and your wiring installation:
- If your vehicle has a smart alternator (variable output voltage) you must connect the BLUE WIRE to a source that is active ONLY when the ignition is ON.
- The BLUE “ignition sense” wire will activate the IDC25/IDC45 ON when there is greater than 12.2 volts applied. You must ensure there is NO VOLTAGE available to the BLUE WIRE when the ignition is turned OFF
- The BLUE “ignition sense” wire is ONLY required if the IDC25/IDC45 voltage feed is less than 13.4 volts CONSISTENTLY.
- Starter battery Negative, AUX battery negative, Solar Negative and IDC25/IDC45 Negative MUST all “SEE” each other either through a common point or at least are all connected to the same METAL surface.
- The first thing to check when you are experiencing issues, are the FUSES. There should be a 50 amp fuse on the INPUT (RED) and OUTPUT (BROWN) cables.
- It is highly recommended NOT to use Circuit Breakers. Incorrect fitting or vibration can cause intermittent operation. We recommend ANS fuses or better.
- Ensure THOROUGH cleaning of both sides of metal surfaces when grounding the NEGATIVE cables to the chassis. In our experience, this issue generates the majority of our request for support calls.
- Consider good quality STAR or SPRING washers when bolting to the CHASSIS for grounding to ensure the best contact to the chassis. Do not underestimate the impact of inadequate grounding.
- DO NOT use self tapper screws for grounding high current cables to the chassis. Immediate failure or failure over time is almost certain. Use a bolt and nut, and tighten firmly.
- The IDC25/IDC45 solar input (GREEN cable) must NOT have a Solar Controller installed between the Solar Panel and the IDC25/IDC45. Only a raw feed from the solar panel is suitable.
- It is NORMAL for the IDC25/IDC45 to appear to be idle every 2 minutes while the unit searches for the best mode of operation.
- An intermittent charge light suggests a high voltage drop from the alternator (inadequate grounding or low voltage to the red input wire).
Key Measurement Values
A multimeter is critical for accurate diagnosis of IDC25 issues, plus an understanding of how to use it. You need to be able to check voltages, current and continuity.
|Measurement Values||12V Vehicle||24V Vehicle|
|Minimum Input Voltage (From Starter Battery)||11.9V||26.8V|
|Maximum Input Voltage (From Starter Battery)||32.0V||32.0V|
|Maximum Solar Voltage Input||28.0V||28.0V|
|Maximum Solar Wattage||385W||385W|
|IDC25 Turn On Voltage (Blue Wire Not Connected)||13.4V||26.8V|
|IDC25 Turn Off Voltage (Blue Wire Not Connected)||12.8V||25.6V|
|IDC25 Turn On Voltage (Blue Wire Is Connected)||12.2V||24.4V|
|IDC25 Turn Off Voltage (Blue Wire Is Connected)||11.9V||24.0V|