Solar cells are one of the most amazing inventions of the last 50 years, as they are able to harness the sun's energy and convert it into electricity. But how do solar panels work?
The original 20% efficient solar PV system was built here in Australia and we have come a long way with this technology since we first experienced it. Now you can install solar panels on your home to offset your electricity bills.
Let's answer some burning questions about solar panels.
How do solar panels work?
Solar panels generate electricity from sunlight. Sunlight, falling on the panel, turns into electricity. Photovoltaic cells (which you may know as photovoltaics) create an electrical charge in a moving panel, which is then fed into your home (after being converted from direct current). power adapter).
Energy from solar panels can be fed back into the grid to offset your electricity bills, although you can store energy for later use with a home battery. If there is an excess, it is fed back into the grid.
How much do solar panels cost in Australia?
Depending on the size of the solar panel, the price increases. Solar Choice has an excellent guide to the cost of solar panels of various sizes in every major city in Australia.
Below is Solar Choice's January 2023 price estimate for a 7kW system, which is the standard solar system you'd find on a rooftop solar home. This price includes initial incentive and GST.
- Adelaide, South Africa: $5,580
- Brisbane, Queensland: $7,210
- Canberra, ACT: $6,610
- Darwin, Northern Territory: $11,250
- Hobart, TEN: $8,160
- Melbourne, VIC: $6,220
- Sydney, New South Wales: $6,100
- Perth, WA: $9,120
How many solar panels does it take to power a home?
For solar panels to work efficiently, they must reflect your home's energy use. You don't want to produce less energy than you use, although solar panels won't hurt you since you'll still benefit from their energy production.
According to Choice, a 5kW system is sufficient for most homes, but that's less than the number of panels and more kilowatts (kW). For example, a 24-panel system consisting of 275-watt solar panels can produce about 6.6 kW of electricity, which is enough for most homes.
Don't forget you need roof space. Solar panels take up a lot of space.
Should I add batteries to my solar system?
If you want to use more of the solar energy you produce and be less dependent on the grid, batteries can help you use it at night when the sun isn't shining, using the stored energy your panels produce. . South. Solar panels typically cost between $4,000 and $20,000 depending on capacity. However, you don't need batteries for solar panels to work.
How long do solar panels last?
According to Skyline Solar, solar panels typically last about 25 years, but their efficiency can decrease over time. To get the most out of it during this time, make sure you store it properly (ie clean it). It also increases the performance of the solar cell and reduces its efficiency over time.
Also, cheaper and lower-quality solar panels may not last as long as more expensive ones, so it's best to shop around and compare models.
How to clean solar panels?
As with most household cleaning, you can hire a professional cleaner online, but if you want to do it yourself, Shoalhaven Solar recommends using water and a soft, non-abrasive cloth or sponge to remove dirt. To avoid leaving marks, use a sieve or chamois after the first cleaning. Do not use soap stronger than detergent, and use it only when necessary.
What are the disadvantages of solar energy?
While solar energy can lower your utility bills, there are potential drawbacks to consider depending on where you live.
First, they are an integral part of the roof, which essentially rules them out for tenants unless you have a special arrangement with the landlord and the property. If you are not a tenant, you should make sure that the panels are installed on the part of the roof that is not in your way. If you don't like the position of the roof panels and want to move them, this can add to the cost.
Another big issue: cost. We've already written that a 7kW solar system in Sydney will cost a homeowner around $6,000, which, while not a ridiculous amount, is still quite an expensive purchase. Paying a professional to install a system can add anywhere from $800 to $2,000 to your bill, even though a solar system is usually listed as a complete system (thanks to Lance Turner for the clarification).
This cost is mitigated by the fact that you don't pay high electricity bills, but it's a high entry-level price.
Finally, note that solar energy depends on the weather, as its effectiveness is limited in cloudy weather and absent at night when the sun is not present. While this isn't a problem for much of Australia with plenty of sunshine, it's something to keep in mind if you come across a suspicious electricity bill after an overcast month.
This article is intended as an explanation of how solar panels work, not as buying advice. Before you buy a solar panel, make sure it's the right choice for your home and lifestyle.
This article has been updated since it was first published.
