People always get stuck at Solar Panel vs Solar Thermal as they are two primary methods if you want to harness the energy from the Sun.
Photovoltaic (PV) Panels (producing electricity directly from the Sun)
Solar Thermal Technology (Generating heat using sun energy which you may use for multipurpose)
They both are different technologies, but the primary principle upon which they work is the same, which is they both get energy from the Sun and work under it.
YOU probably know about photovoltaic (PV) panels more as compared to Solar Thermal as they are the most used and common way of harnessing the Sunlight.
But you might barely know about Solar Thermal. So let us define the term and functionality so you can be familiar with it;
The difference in their working is Solar Thermal Technologies produce energy using heat. If we talk about Solar Photovoltaics, it generates electricity directly right from the Sunlight.
In simple words,
Solar thermal uses the Sun’s energy to produce thermal energy which can be used for multipurpose.
Photovoltaic (PV) systems produce electricity instead of heat.
But the primary use of Solar Thermal is getting hot water.
So in the picture, we can see Solar Thermal is absorbing heat and Solar Panels absorbing Sunlight.
The technology that collects the Sun’s energy and converts it into heat. You can use that heat where you want. But the essential reason behind using this technology is converting heat into electricity or to heat water or space of your house like in Winter. It all takes distinct technologies.
Why We Use Solar Thermal as There is Natural Gas for heating Water?
Natural gas or fossil fuel is not eco friendly, so if you rely on natural or electricity to power up your house and water heater. We should consider solar thermal water heaters make to convert the heat from the Sun into hot water for your home or other purposes, it also needs a solar collector.
Solar Panel vs Solar Thermal: What to Choose?
Solar Thermal suits on large utility-scale solar projects. You might have heard Concentrating Solar Power (CSP) that is used at the large level as well, as mirrors are used by them to concentrate sunlight for better productivity.
On a large scale, CSP plants are more productive than conventional solar farms. However, CSP facilities need large amounts of land and are only well satisfied with specific geographic areas of the country or world.
At home level, solar heating is a good way to set your home as it can be paired with Solar PV as well for reducing total electric demand for your house for a lifetime, this will make the influence of each solar panel that much greater.
Solar thermal hot water and Active solar heating should be judged in comparison to solar PV. Which technology makes the most fiscal sense for your house may be a mix of technologies specified by the specifics of your location, electricity need and load, and general heating or hot water needs.
Well, Solar Thermal possesses different technologies, so comparing with solar panels does not make sense. And it is precisely hard to differentiate them as solar panels are best if you need electricity and solar thermal if your concerns are regarding water heating. Solar PV panels are leading, and their prices are decreasing.
Your choice would always be dependent on what you need, but Solar Thermal could be a perfect solution for heating water.
You can see the difference in the looks of both panels or energy collector;
Solar PV Panels
Solar Thermal Technology
We use collectors or panels too for collecting power from the Sun to produce energy usually on the rooftop.
Advantages and Disadvantages: Solar Panel vs Solar Thermal
Solar panels are long-lasting, can be with you for 30 years plus they come up with a good warranty.
They can bear your needs of up to 60%. A big benefit of the solar panel is it generates electricity that can run your stoves as well.
Become more efficient in sunny weather work well in cloudy weather as well.
They add value to your homes.
Solar panels take good space
People are still not satisfied with the upfront cost as it is high
It takes to recover the initial investment.
Solar panels are a new trend and will surely surge high in the future. Having Solar panels make you sell excess amount of electricity to the grid and make earning so this is noticeable.
The pros and cons of Solar Thermal are following;
Solar Thermal Technology can cut your electricity and gas bill.
Solar Thermal gets you done with initial cost in lesser time.
It is dependable and lesser complex than solar panels, widely used in the world where energy is needed in more amounts.
They are up to 70% efficient in collecting heat from the Sun.
They are less effective in Winter and resilient as solar panels are.
These days, homeowners are opting both systems by mixing them for better productivity. But Solar PV systems are considered more versatile than solar thermal ones so we can say upcoming time is of Solar panels for homeowners.
Solar Photovoltaic Working
Solar PV panels comprise semiconductor that helps them in converting the Sun’s rays into electricity. .Photovoltaic Energy works on the principle of the Photovoltaic Effect, you know photon hits on a panel comprising a semiconductor. Silicon is usually used as Semi-conductor material mostly, over 90%. Electrons releases when photons hit on the panel so that phenomena are producing electricity.
These semiconductors constitute the core/heart portion of solar cells. Semiconductors gain the electric current converting it into electricity for the commercial or residential purposes.
Solar thermal is almost the same in working. It works on the principle that flowing fluids in the tunes of the solar panels where sun rays heat it. So Flat panels or deserted tubes hold water and flow it through the water heating or home heating system using pumps. Residential solar thermal heating is usually linked with backup boilers to provide heat about around year and hot water.