What are the best solar panels to use in winter

 

Improper testing of solar panels can sometimes lead to inaccurate results when trying to diagnose a fault. Below are the correct ways to test an unadjusted solar panel. (Red arc's BCDC, LFP and BMS spheres should see a nominal 12V unregulated solar input; the following test procedures and results are based on this).

How to check the solar panel in detail

 we need to mean necessary to check the solar penal, some things as:

• Multimeter.
• 2 x 12V 21W globes in series or 1 x 24V 55W incandescent globe wired together.

Testing Open Circuit Voltage (VOC)

Disconnect the panel from the regulator and set the multimeter to measure the DC voltage (this is usually shown as "V - - -" on the multimeter).

Connect the positive lead of the multimeter to the positive lead (or terminal) of the solar panel and the negative lead of the multimeter to the negative lead (or terminal) of the solar panel. The multimeter will now show the open circuit voltage of the solar panel.

• Results (typical).
• 12 V panel nominal: 18 to 28 V.
• 24 V panel nominal: 34 to 56 V.

Testing Short Circuit Current (ISC)

Disconnect the panel from the regulator and set the multimeter to measure the current (A) - ensure that  means:

A minimum setting of 10A is selected (Note: for panels with ISC greater than 10A, a multimeter with appropriate current rating should be obtained).

Connect the positive lead of your multimeter directly to the positive lead (or terminal) of the solar panel, and the negative lead of the multimeter to the negative lead (or terminal) of the solar panel. This will show the short circuit current of the solar panel.

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Load testing the penal

There may be some cases where the above tests will give results within specification, however applying the load to a panel may expose hidden faults.

In this case, a simple visual test can be done using 2 x 12V 21W globes in series or 1 x 24V 55W incandescent globe (as described above).

Connect the globe wires to the positive and negative panel wires (polarity is not essential to observe, but be careful). The globe should light up brightly if the panel is working properly and full sun is available. Failure to illuminate may indicate a faulty panel or connection.

At the end of the article we show that there are many ways to check the solar penal, and this ways is very important for every solat penal wherever.