How Do Solar Lights Work?
What are solar lights made of? Solar lights are made up of four main components: the solar photovoltaic (PV) panel, battery, control electronics and the light fixture. When the sun is out, a solar panel takes the light from the sun and produces electrical energy. The energy can then be used immediately or stored in a battery. The goal of most solar lights is to provide power at night, so they will definitely contain a battery, or be capable of attaching to a battery. The battery itself may not need to have a large capacity, due to the availability of solar energy, but it should be long lasting to account for difficulties replacing batteries in many places across the globe.
The advent of the Light Emitting Diode (LED) for the light fixture has drastically reduced the capacity needs of both the solar panels and the batteries. They use significantly less energy than other types of lighting, so the solar panel and battery can be smaller (more transportable and less expensive). The control electronics are required to move the energy around the system, keep the system safe, and potentially switch on or off your light, depending on the level of light it’s exposed to. Solar lights made for outdoor lighting will often turn on automatically when it gets dark outside. Some solar lights made for reading will turn off during daylight hours to preserve the solar charge, but won’t turn on until they are powered on by a user.
How is solar energy produced? Let’s look a little more deeply into the science behind solar electricity. Solar energy is produced due to the photovoltaic effect. A photovoltaic panel (also known as solar cell) converts sunlight into electrical energy. The solar cell is made up of multiple layers of crystalline silicon and chemicals that create layers of negatively-charged electrons and positively-charged spaces. When light passes through the solar cell, it excites the negatively-charged electrons and pushes them into the positively-charged spaces. Those spaces then transfer the electron stream as direct current of electricity through the wires in the solar cell for use or to a battery where the power is stored until it is needed.
Here you see how the sunlight excites the electrons to create electrical energy.
Image courtesy of the Green Energy Blog linked here.
What are the benefits of solar lights?
At Unite to Light, we use the advances in technology for solar energy to help people without access to electricity. We target those that the existing solar market does not - children, women, health clinics, midwives and victims of natural disasters. Through our “Buy One, Give One” program for every light or solar charger & battery pack you buy, we will donate one to someone in need.
1/8/2021 09:47:11 pm
for two months my hummer lights changed colors until two nights ago. All of a sudden they are just red. If I cover the solar panel on top they start changing again. But 24 hours later they have blacked out. suggestions?
Unite to Light
1/12/2021 02:50:45 pm
Hi Gail. I'm not sure what you mean by "hummer lights". Did you buy one of our solar lights? Or is this another technology that you're looking for advice on?
4/13/2021 10:16:58 am
It's awesome that you mention that solar lights are very energy-efficient. I want to lower my energy bills, so I'm considering buying some outdoor solar lights for my garden. I'm going to look for a reputable business that can sell me some outdoor solar lights.
4/17/2021 03:26:56 am
Such a nice blog on solar light and I hope you keep update us with such great tips and information in future too. This is a great post; I will share as much as I can.
6/3/2021 11:13:22 pm
Thanks for sharing Barefoot Connect 600, solar-powered lighting. Since solar lights are fully powered by energy and reasonable in price. We can also manage and control these solar lights remotely which is the best advantage of these lights. Get in touch with Silan Solar for best and good solar lights at your Doorstep !
9/1/2021 12:04:39 pm
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10/4/2021 03:54:35 am
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10/5/2021 11:46:00 pm
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3/8/2022 04:26:09 am
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5/20/2022 09:23:50 am
The control electronics are required to move the energy around the system, Thank you, amazing post!
6/3/2022 09:35:01 am
The solar light are widely available on the internet, in simple terms Solar Lights work with the help of photovoltaic effect, Solar cells are an important part of solar light because,
8/25/2022 08:44:26 am
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9/28/2022 08:41:55 am
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9/28/2022 08:50:56 am
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12/14/2022 07:48:08 am
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