Wednesday, July 17, 2024

Beat the warmth: How photo voltaic panels can cool your property cost-effectively


Scorching sizzling temperatures could be tolerated by switching on the air con – which is vitality intensive and costly. That is why the set up of eco-friendly photo voltaic panels turns into important. Temperatures drop an increasing number of in the summertime, particularly in cities the place buildings and concrete buildings retailer warmth. If the temperature rises above 30 levels Celsius (86 levels Fahrenheit), it may be a critical well being hazard, particularly for the aged and sick.

South Korean residents set up photo voltaic panels subsequent to their air conditioners. (YNA/dpa/image alliance)

And whereas drawing curtains to maintain out the solar in the course of the day and ventilate the homes in the course of the evening with the assistance of its cooler, many resort to energy intensive air con items. Fortunately, the solar itself helps hold us cool. Because the solar often shines for lengthy durations of time in the course of the summer season, solar energy is good for producing the massive volumes of electrical energy wanted to cheaply run the air con that helps make the intense that warmth is extra bearable.

How many photo voltaic panels does it take to chill a home?

It depends upon the vitality effectivity of the cooling system and the variety of hours of sunshine. But to present an instance, for a well-insulated house of about 40 sq. meters (430 sq. ft), a small air con unit that wants lower than 1,000 watts is sufficient.

A typical photo voltaic panel of about 2 sq. meters can generate as much as 400 watts of electrical energy in direct daylight, though on cloudy days it could solely produce about 30% of that quantity. But usually talking for a small flat, the electrical energy from three to 4 photo voltaic panels must be sufficient to run an air-con unit.

If, nonetheless, the home is poorly insulated or has many gadgets corresponding to computer systems operating, it can warmth up and due to this fact require a bigger cooling system with the next energy demand. In this case, a number of photo voltaic panels could be put in.

How a lot does photo voltaic price?

Solar vitality has plummeted in worth, with panels costing solely a tenth of what they did in 2005. In cities, they’re typically put in on rooftops or balconies. To run a small air con system, a so-called balcony energy station with 4 panels (1,600 watts) and costing €1,000 ($1,080) in Europe, is often sufficient. Solar energy is just fed into the grid via a traditional socket.

Larger roof techniques – put in by professionals – are costlier. For a system with 25 panels (10,000 watts), German owners can count on to pay between €13,000 to €18,000. A 400 watt photo voltaic panel going through the noon solar will generate roughly 400-800 kilowatt hours per 12 months. With a service lifetime of 30 years, this ends in a solar energy worth of lower than 10 euro cents per kilowatt hour (kWh), which is usually cheaper than electrical energy from the grid.

Do they nonetheless work at evening and through energy cuts?

Cooler evening temperatures typically get rid of the necessity for cooling techniques and the vitality wanted to function them. But those that wish to use solar energy at evening will want a battery unit. A battery with 5-10 kWh for photo voltaic panels on the roof at present prices between €3,000 and €8,000 in Germany, together with the set up worth. Since photo voltaic vitality is mostly fed into the grid, a house unit is just not immune towards energy cuts. Apart from including a particular management system with a price ticket of no less than €1,000.

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