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Getting the Most out of Solar Panels

Views:10     Author:Site Editor     Publish Time: 2020-08-05      Origin:Site

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If you’re thinking about going solar at your home or business, you want the biggest bang for your buck.

 

Luckily, solar is cheaper than ever, thanks to the falling cost and rising efficiency of photovoltaic (PV) solar panels. But here’s something to consider: figuring out the real cost of solar energy is about more than just the price tag on the panels and their rated power output. For example, there’s the lifespan of the panels to take into account. And then there’s the system’s “solar energy yield” -- or how much electricity it will actually generate over the course of the year.

 

Solar panels are rated on efficiency and the power output under standard laboratory conditions. Of course, your solar energy system isn’t being installed in a lab. It’s going outside, where all kinds of things can change its actual solar energy yield.

 

MAN, IT’S A HOT ONE

High temperatures reduce the voltage of a solar cell -- which, as you might guess, is a bad thing. Conventional rooftop solar modules can lose as much as 30 percent of their electricity output on hot summer days. A better way to address this problem is to improve the backsheet -- or bottom layer -- of a solar PV module, which serves as an electrical insulator and protects the module from moisture and other environmental damage. Moreover, it is believed that performance of solar panels will be improved by better heat-conducting properties.

 

DIRT DOES HURT

Another way panels lose power is simply that they get dirty. The effects of “soiling” (as it’s known in the solar industry) vary widely by location, but energy yield losses of 10 percent are not uncommon. Research on environmental conditions and panel maintenance procedures could help us better understand how and why panels lose power to dirt, which in turn could lead to better prediction of soiling from one solar energy system to another and more effective dirt-resistant treatments for PV module glass.

 

SHADY SITUATIONS

While heat and dirt reduce solar panels’ energy yield in a pretty straightforward way, shadows are a bit more complicated. In instances when a faint cloud goes over the solar module, the power levels are simply reduced. However, sometimes the light is completely or regularly blocked by a permanent structure -- like a utility pole that shades just one part of the module -- which can actually cause “hot spots” that can damage the module over time. 

 

If you are trying to get the most out of solar panels, you may need to take these listed factors into consideration when you’re buying solar panels.

Getting the Most out of Solar Panels
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