5 kilowatt (5kW) solar techniques have develop into some of the fashionable sizes in Australia, due to the mix of excessive energy yields and nice value-for-money that they ship. What are the worth ranges, electrical energy yields and monetary returns {that a} family can anticipate from a 5kW solar PV system? This article takes a glance.
How many panels & how a lot roof area for a 5kW solar system?
A contemporary-day 5kW solar system might be comprised of between about 15-20 panels and would require about 25-35 m2 of roof area, relying on the wattage of the panels and the way they’re tilted. You can discover your individual roof’s solar potential right here.
How a lot do 5kW Solar Systems price?
Australia is home to a number of the lowest solar PV system costs on the planet, due to a broad mixture of world and native components. According to the Solar Choice Price Index, the typical price of a 5kW solar system in Australia as of March 2022 is about $1.03 per watt – or about $5,170, with a low of nicely below $1/W ($2,050) and a excessive of about $1.40/W ($7,000).
The graph under reveals how the price of a 5kW solar system has declined over the previous decade, damaged down by state capital cities across the nation.
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How a lot power will a 5kW Solar System generate?
Depending a variety of components, the precise power output of a 5kW solar power system will fluctuate. These components embrace:
-Geographical location of the system and the anticipated every day and annual solar irradiation and cloud cowl ranges there
–Orientation and tilt angle of the solar panel array
–Whether there may be any shade forged on the panels
-Actual working temperature of the panels
-The efficiency of the person parts (e.g. the panels and the inverter)
As talked about within the first level above, totally different areas obtain totally different quantities of daylight. The quantity of sunshine falling on a solar panel array has a direct affect on the system’s output. As a tough determine, a rooftop in Australia can anticipate to obtain round an annual common of 4.5 hours of ‘peak sun’ (peak solar hours, or PSH) per day, though this quantity might vary as excessive as 5.8 PSH per day in locations like Darwin or as little as 4.2 PSH per day in Tasmania. This is just the annual common per day, and it is very important remember that there might be extra solar in the summertime and fewer within the winter months.
Example: An optimally tilted, 85% environment friendly, north-facing 5kW solar system in Sydney, for instance, would produce about (3.5 PSH x 5kW x 85% =) ~15kWh of power on a day within the peak of winter, whereas in the summertime output from the identical 5kW solar system could be round (6.2 PSH x 5kW x 85% =) ~26kWh. (Figures are solely to be taken as tough estimates.)
What is the monetary return on a 5kW Solar System?
The monetary returns from a 5kW solar set up are a bit more durable to work out, and primarily contingent on whether or not or not a solar feed-in tariff is on the market to the proprietor/operator of the system. Solar Feed-in Tariff schemes pay solar system house owners a set quantity for every unit of solar power that they export to the electrical energy grid.
There are community limits on whether or not you’re allowed to export energy out of your Solar PV system, and feed-in-tariffs accessible additionally fluctuate enormously state to state.
Examples utilizing Solar Choice’s solar power system ROI calculator
Using Solar Choice’s Solar PV System Return on Investment Calculator, we’ve calculated indicative payback intervals, annual inner charges of return (IRR) and annual financial savings (in yr 1) utilizing 5kW solar techniques for frequent utilization conditions in some main cities primarily based on common system costs as of February 2022.
Payback occasions rely closely on the quantity of solar energy that you simply devour instantly vs export to the grid (‘solar self-consumption ratio’), so we’ve included each ‘low’ (30%) and ‘high’ (50%) situations.
If you don’t or can’t use a lot electrical energy throughout daytime, you’re extra prone to be on the ‘low’ finish of the self-consumption spectrum, whereas in case you do use numerous energy through the day (e.g. since you’re home or as a result of you possibly can run gadgets like dishwashers when you’re away) then it’s possible you’ll be on the ‘high’ finish.
| Indicative returns for 5kW solar techniques @ common costs | ||||||
| Location | Price | Energy Rate | Feed in Tariff | Self Conumption Rate | Annual Saving | Payback Period |
| Sydney | $4,620 | 22c / kWh | 10c / kWh | 30% | $996 | 4.6 Years |
| Sydney | $4,620 | 22c / kWh | 10c / kWh | 50% | $1,258 | 3.6 Years |
| Brisbane | $4,880 | 20c / kWh | 9c / kWh | 30% | $976 | 4.9 Years |
| Brisbane | $4,880 | 20c / kWh | 9c / kWh | 50% | $1,216 | 3.9 Years |
| Melbourne | $4,660 | 19c / kWh | 6.7c / kwh | 30% | $763 | 5.9 Years |
| Melbourne | $4,660 | 19c / kWh | 6.7c / kwh | 50% | $1,023 | 4.4 Years |
| Perth | $3,770 | 29c / kWh | 5c / kWh | 30% | $1,090 | 3.4 Years |
| Perth | $3,770 | 29c / kWh | 5c / kWh | 50% | $1,580 | 2.4 Years |
Key Assumptions:
- We have assumed that the family consumes a mean of 25 kWh per day
- We have used energy charges and feed in tariffs in the direction of the sharper finish of whats accessible available on the market
- Pricing is predicated on the Solar Choice Price Index from March 2022
Try plugging some figures into our solar system ROI calculator your self.
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