How Many Volts and Ampers Does One 72-Cell Solar Panel Produce?
Solar Cells: Should the Number of Volts Matter to You?
Considering to buy solar panels, you may get curious about the volts, ampers, etc.
You may ask this question:
What is the typical number of volts a solar panel can produce?
Usually, a single solar panel measures 2m x 1m.
On that panel, there are 72 solar cells. Each cell can produce 0.5 volts.
Thus, a single panel with 72 cells can generate 36 volts.
Nevertheless, should the number of volts, ampers, etc. even matter to you?
To provide a better context for the answer, we need to define solar cells, first.
What are solar cells?
A solar cell is the basic unit of a solar power system.
Solar arrays are a group of solar modules or panels, which are a group of solar cells.
Made of doped Silicon, solar cells absorb sunlight and convert it into electricity. This process is called the photoelectric effect.
The earliest photoelectric effect was discovered by physicist A. E. Becquerel back in 1839.
However, it was Charles Fritts who made the very first solar cell.
Meanwhile, it wasn’t until the 50s when developers discovered that doped Silicon was highly efficient in absorbing light.
That discovery opened many doors for solar cells.
To this day, governments and scientists are still pouring attention into the development of solar cells.
Now, when considering solar panels, you need to think about its energy payback.
Energy payback: what is it?
Energy payback is a process of repaying the cost and energy spent on making them.
Who does the repaying? Well, it should be what.
The renewable source of energy, which, in your case, is the PV system — should give back the energy spent on producing them throughout a certain timeframe.
The timeframe is called Energy Payback Time or Energy Payback Periods.
Often, solar panels are mistaken to cost more energy than they can repay.
In the past, solar panels are highly expensive to produce. Their energy payback periods also take too long.
However, that was the case before — times have changed now. Solar panels today have better designs and faster energy payback periods.
In fact, today’s solar panels can exceed the expected energy payback amount.
Now, this brings us to your question:
Should you still worry about volts, ampers, etc.?
Truth is, you mainly worry about the cells’ efficiency.
Many factors affect solar cell efficiency — which you should study, so you can make sure those factors don’t jeopardize efficiency.
Consequently, the efficiency affects their ability to produce the right amount of volts.
Moreover, if your solar panels continue being efficient for a long time, then the energy payback period won’t lag behind.
So, based on those facts, efficiency should be your main concern — not the number of volts, as they are only the output.
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That’s why you need the guidance of experts in choosing the right solar cells.
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