How do I know if my controller is still covered by the warranty?Our warranty is valid for 10 years. You can determine the date of manufacture by looking for the DATE CODE on the products' serial number tag. The code will look like M/Y 12/25 (M=month, Y=year). How do I check for bad connections? (THIS IS THE MOST COMMON CAUSE OF PROBLEMS)If your system WAS working, and it NOW has problems, suspect a bad connection, especially if you have changed nothing. With the system operational, and current flowing, use a voltmeter to check the voltage at: 1) the terminals directly at the battery, and 2) the BATTERY terminals on the regulator. These voltages should be about the same (within a few tenths of a volt). If not, suspect a bad connection in the battery line. OR....check the voltage at: 1) the terminals directly on the solar panel, and 2) the ARRAY terminals on the regulator. Again, these voltages should be the same. If you find a voltage difference, inspect for corroded or loose connections, blown or loose fuses, or any other possibility for a bad connection. LOOKS CAN BE DECEIVING! If you measure a large voltage difference, YOU HAVE A BAD CONNECTION! Why is my regulator making a high-pitched buzzing sound?This sound indicates the regulator is connected to the panels but is not connected to the battery. Check ALL of the connections/fuses between the regulator and the battery. The charging light on the regulator is on all day. Is this normal?This may indicate several things, but the most likely is that your system is not sized properly. You are probably consuming more power than the solar panels are producing. This is why the regulator is charging all day. Contact your solar dealer for a system evaluation. The charging light on the regulator glows dimly at night. Why?The charging indicator light requires very little power to illuminate. Moonlight or a streetlight is sufficient to cause this dim glow. It does not indicate a problem. Why is the charging light flashing on and off?This is a normal condition. When the battery is fully charged, and the array can provide a lot of charge current, the controller can pulse on and off rapidly, particularly when there is current being used by a load. This is a normal operating condition and is not a problem. What should I expect on a "typical"day?A typical daily cycle will be as follows: As the charging starts for the day and battery capacity is low, charging will be continuous. As the battery charges up, current will pass into the battery for a while and eventually stop. Later, charging will resume and the system will continue this cycle throughout the day. During the course of the day, the duration of the charging period of each cycle will get shorter (cycling on for shorter periods and staying off longer). When the battery is close to full charge, it will pulse current into the battery to achieve and maintain full charge. This pulse charging is indicated by the "CHARGING" light occasionally turning on and off. Application of a load during the day will cause charging to be continuous, depending on the size of the load.

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