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Common Failures of Solar System Controllers


Off-grid solar system controller common faults are mainly divided into: can not be charged, the charging current is too small, the battery power consumption fast, the load can not work.Let's do some analysis about the specific problem as bellows:

Ⅰ.The solar panel can not charge the battery

1.To confirm whether the solar panel connection is correct, if the positive and negative is reversed or not.

2. If the solar panels are blocked.

3. If the solar panel specifications are correct,whether the open circuit voltage meets the requirements of the controller.

4. If the power of the solar panel exceed the controller's rated system.When the power is too large, may lead to solar intelligent controller burned.

5. If the battery is full, when the battery is full of controller,it will into the floating stage, the charging current will become very small.

Ⅱ.Battery power is not enough, will no electricity soon

1. If the battery capacity design is reasonable, too small for the capacity, the use of natural time is short.

2. Battery aging, the battery life is generally 2-3 years, the battery capacity attenuation is very large, need to regularly replace the battery.

3. If the battery have a short circuit during the installation process,Short-circuit damaged battery,the capacity is reduced too much.

4. The load power exceeds the design power.

Ⅲ.The load does not work

1. To confirm the operating voltage of the load is the same as the controller output voltage

2. If there is no short circuit and overload of the load

3. If the controller load output has not been turned off by manually

4. If the battery voltage is too low or too high lead to controller load protection

5. Whether the load output has a delay setting


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