Solar Thermal vs Solar PV: Which is better?



Solar Thermal vs Solar PV: Which is better?

Both solar photovoltaic panels (PV) and solar thermal panels are powered by the same energy source, the sun. There is however a difference between solar thermal and solar PV technologies. They are used for different purposes. Solar PV converts solar energy into electricity, while solar thermal converts it into heat to heat your home.


Which option is better for the Irish consumer?


The answer to Solar PV vs Solar Thermal

This question depends on the energy requirements you have, such as home heating or general electric. Although solar thermal power is primarily used to heat water, it can also be used for heating the home. The solar thermal system works by having the panels on your roof capture the sun's rays. This heats the liquid within the panels and then transports it into your hot water tank. You can store it here until you're ready to use.


Solar Thermal's Advantages

  • Solar thermal technology uses less space than solar PV. Solar thermal technology takes up less space than solar PV, so it is ideal for people with smaller roofs.

  • Solar thermal technology is much simpler than solar PV.

  • The efficiency of solar thermal is high. Solar thermal is up to 70% more efficient than solar PV when it comes to collecting heat sunrays.

  • Solar thermal is more sensitive to light than solar PV, so it works well in cloudy conditions.

  • If you have a hot-water cylinder already installed in your house, this is an environmentally friendly way to heat water.


Solar Thermal Issues

Solar thermal energy is a better choice than solar PV because it takes up less space. Solar PV panels can take up to 2-3x as much space on your roof as a solar thermal system for heating water. Solar thermal has a higher efficiency rate than solar PV, as we have already mentioned. Solar thermal requires a hot water tank, so it takes up more space. Solar thermal has the potential to leak because there are so many pipes connecting the components. This issue is not related with solar PV.



Solar PV's Advantages

  • They are durable and can produce clean energy for approximately 30 years.

  • These can be used to cover as much as 80% of your household's electricity requirements, and sometimes even more.

  • They can be used in summertime, but they don't freeze in winter (solar thermals can freeze).

  • These are ideal for households that consume high amounts of energy.

  • The SEAI offers grants to subsidise the initial investment cost.

  • Can Solar PV heat water?

  • Solar PV is more flexible than solar thermal, which is a major reason why you should choose it. Solar thermal can only heat your hot water while solar PV can provide both electricity and hot water. The solar PV system has a diverter that monitors when excess electricity is being generated. Instead of sending excess electricity back to the grid the diverter will redirect this electricity to your immersion to heat your water.


Why Solar PV is the winner

Annually, the cost of energy on grid rises by approximately 3.5%. However, the technology and pricing of solar PV systems are improving. A solar PV system is a smart investment that will save you money and reduce your carbon emissions. Below is a chart that shows the differences between solar thermal and solar PV in terms of the energy produced.


Comparison of the two types

In that it generates electricity, solar PV is better than solar thermal. This can be used to heat water as well, as we have already explained. Solar thermal, on the other hand, is a system which is only used to heat water or air. The government SEAI grant program can help subside the initial costs of solar PV. In the near future, solar PV owners will be able sell excess electricity they produce throughout the year back into the grid to further reduce their home energy costs.


Renewable energy - Solar power

Check out our website if you're interested in saving money on energy. Get a free quote today and let us guide you on your journey towards zero carbon living.


 

SolarShare

Carlisle Building 51 Bracken Road, Sandyford Co. Dublin, D18CV48, Ireland


+3531800814213

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