Can We Stack Solar Panels to Increase Solar Energy Absorption?

In summary, there is a possibility to stack solar panels one on top of the other with a small space in between in order to increase the amount of solar energy absorbed. This can be achieved by using lenses to converge and diverge the sun's rays onto the panels. However, using transparent solar cells may not be very useful as the amount of energy collected would be similar to simply closing the gap with more panels. A more interesting arrangement could be using different layers to absorb different wavelengths of light. It is also suggested to use a mirror on the bottom of the cell to reflect any unabsorbed light back onto the panels. Proper sunlight exposure is crucial for the effectiveness of solar panels.
  • #1
chound
164
0
Is it possible to have solar panels one over the other with little space between them to get 10 panel stacked structures to increase the amount of solar energy absorbed?


There are four solar panels. Another 4 on top of them leaving some space between this four and the bottom four. In the junction where the 4 panels join if we have a concave lens of very small focal length. This will make the sun rays to converge at f. Now we take a convex lens and fix it in such a way that the its focus will lie on the focus of the concave lens. The convex lens will make the lightrays diverge and this can be made to fall on the 4 solarpanels below.

Is this possible?

Next:
Can we make transparent solar cells?
 
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  • #2
I got a bit lost on the first bit of your question...

However, why would you want transparent solar cells? If the solar cells absorb the incident radiation, there is nothing left to 'go through' them.
 
  • #3
chound said:
Is it possible to have solar panels one over the other with little space between them to get 10 panel stacked structures to increase the amount of solar energy absorbed?


There are four solar panels. Another 4 on top of them leaving some space between this four and the bottom four. In the junction where the 4 panels join if we have a concave lens of very small focal length. This will make the sun rays to converge at f. Now we take a convex lens and fix it in such a way that the its focus will lie on the focus of the concave lens. The convex lens will make the lightrays diverge and this can be made to fall on the 4 solarpanels below.

Is this possible?

Next:
Can we make transparent solar cells?

Possible, yes. Useful, not.

If you leave the gap between one layer of solar panels, and use this get to allow sunlight pass-through to a second layer of solar panels, the amount of energy collected by the second layer of solar panels will be about as much (though not quite as much) as would have been trapped if you had simply closed the gap in the first layer with more solar panels.
 
  • #4
But we are using lenses to spread sun light over all the panels so won't it increase the energy absorbed?
 
  • #5
It's the same amount of light no matter how it's spread out. Grab a flashlight and see. As you spread the light out, you'll notice it's not appearing as bright as when it's more focused, though it does cover more surface area.
 
  • #6
A more interesting arrangement might be one in which some wavelengths are absorbed in one layer (generating electricity), which is transparent to other wavelengths, which are then absorbed in another layer (different mechanism). IIRC, one type of solar cell works somewhat like this.

Also, why not put a mirror on the bottom of the cell? That way any 'absorbable' light which wasn't has another chance to be absorbed ... on the way up.
 
  • #7
Try every thing with the solar panels just keep in mind, its face must recive proper sun light properly.
 

1. How does stacking solar panels increase solar energy absorption?

Stacking solar panels increases solar energy absorption by allowing more surface area to be exposed to sunlight. This means that more photons from the sun can be converted into electricity, resulting in a higher energy output.

2. Is stacking solar panels a cost-effective method for increasing solar energy absorption?

Yes, stacking solar panels can be a cost-effective method for increasing solar energy absorption. By stacking panels, you can generate more energy without having to install additional mounting systems or inverters, which can be expensive. However, it is important to consider the structural integrity of your roof and the weight limitations before stacking panels.

3. What is the maximum number of solar panels that can be stacked together?

The maximum number of solar panels that can be stacked together depends on various factors, such as the size and weight of the panels, the structural integrity of the roof, and the efficiency of the panels. It is best to consult with a professional solar installer to determine the maximum number of panels that can be stacked on your specific roof.

4. Are there any potential drawbacks to stacking solar panels?

Yes, there are potential drawbacks to stacking solar panels. One of the main concerns is the added weight on the roof, which can cause structural issues if not properly installed. Additionally, stacking panels may also lead to shading, reducing the overall energy output. Regular maintenance and monitoring are important to ensure that the panels are functioning efficiently.

5. Can any type of solar panel be stacked together?

Not all types of solar panels can be stacked together. It is important to consider the compatibility and electrical specifications of the panels before stacking them. It is recommended to use panels from the same manufacturer and with similar specifications to ensure optimal performance.

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