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Talgil - Solar Panel & Battery Charging Testing

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Ensuring the efficiency and reliability of a solar panel requires proper testing. Whether for routine maintenance, troubleshooting, or performance validation, accurate measurements of voltage, current, and power output are essential. This guide outlines the key methods for testing a solar panel, providing a structured approach to assessing its functionality and identifying potential issues.

Testing the Solar Panel

  1. Disconnect the Solar panel from the controller power supply plug.
  2. Connect a Voltmeter to the Solar panel two wires as described on image 1.
  3. The measured voltage supposed to be close to 20V DC.

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4. Connect an Ampere meter to the Solar panel two wires as described on image 2.

5. The measured current can be calculated by the next formula: “I=P/V” where “I” is the current , “P” is the solar panel power, and “V” is the solar panel Voltage.

For example, if the solar panel power is 5 Watts, the current supposed to be 5 watts/20 volts=0.250A DC (250 milli Ampere).

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Testing the Rechargeable battery and charging

  1. Disconnect the solar panel from the power supply plug.
  2. Connect a Voltmeter to the rechargeable battery two poles as described on image 3. The voltage supposed to be above 12V DC.
  3. Measure the battery voltage and make sure that the rechargeable battery voltage does not reduce. The voltage supposed to be stable for 5 minutes.
  4. Connect the Solar panel back to the power supply plug to CHARGE terminal.
  5. Connect an ampere meter to the rechargeable battery as described on image 4. In this way you can measure the charging current. The charging mechanism works in pulses. It is not charging continuously so wait until you will see a positive value.

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Measuring the current consumption of the RTU RF G5

  1. Disconnect the +12V DC wire (Red or Brown wire) of the rechargeable battery.
  2. Connect the positive probe of your Ampere meter to the +12V DC wire of the rechargeable battery.
  3. Connect the negative probe of your Ampere meter to the +12V DC input on the power supply plug of the RTU.
  4. Measure the current consumption of the RTU RF G5. The current consumption of RTU RF G5, when the Router mode is off, and LEDs are OFF, is 40 µA.
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