4kW Solar System: Compare Prices & Returns

How a lot does a 4kW photo voltaic PV system price in Australia, and what kind of return on funding can a family count on to see in the event that they set up one? This text takes a have a look at the enterprise case for 4kW photo voltaic programs in Australia’s capital cities.

How a lot does a 4kW photo voltaic system price?

Photo voltaic PV system costs have dropped dramatically prior to now few years, and the identical goes for 4kW programs. Primarily based on our information from October 2022 –  we will see that on common a 4kW photo voltaic system would price $4,910 together with the STC rebate and GST. This value is damaged down geographically throughout Australia within the desk under which we replace on a month-to-month foundation:

4kW photo voltaic system costs by Australian metropolis

Notes on these costs

1. Listed costs are averages of installers pricing from Photo voltaic Selection’s community of over 200 installers
2. Value contains STC rebate however excludes any state primarily based rebate (like Photo voltaic Victoria)
3. Your value might fluctuate on many components like roof materials, double tales, high quality of photo voltaic tools chosen and so on.

Historical past of 4kW photo voltaic system costs

Each month since August 2012, Photo voltaic Selection has been publishing pricing information for a variety of photo voltaic PV system sizes throughout all of Australia’s capital cities. The price of a 4kW Photo voltaic Selection has greater than halved since we first began monitoring these costs.

4kW photo voltaic system output

There are a variety of things that have an effect on the precise energy output of a 4kW photo voltaic system, nevertheless. These embrace:

-Geographical location of the system and the anticipated every day and annual photo voltaic irradiation and cloud cowl ranges there

–Orientation and tilt angle of the photo voltaic panel array

–Whether or not there’s any shade forged on the panels

-Precise working situations of the panels & inverter (e.g. temperature)

Relying on the place the system is positioned, it would obtain completely different quantities of photo voltaic irradiation all through every day and every year. The quantity of sunshine falling on a photo voltaic system’s photo voltaic panels straight impacts the system’s output. A photo voltaic system which is dealing with the proper path (i.e. north) in Australia can count on to obtain round an annual common of 4 hours of ‘peak solar’ (peak solar hours, or PSH) per day, though Tasmania receives lower than this, and Broome, WA receives extra. That is solely the every day common throughout the course of the 12 months; it is very important take into account that the solar shines for extra hours in the summertime months and fewer within the winter.

For instance, an 85% environment friendly 4kW photo voltaic system in Sydney would produce about 14kWh of energy on a day in the course of winter, whereas in the summertime output from the identical 4kW photo voltaic PV system can be round 20kWh. (Figures are approximate, primarily based on outputs from NREL’s PVWatts calculator.)

4kW photo voltaic system monetary returns

The monetary return on a 4kW photo voltaic system relies on a number of essential components.

1. How a lot electrical energy you utilize and whether or not you utilize it in the course of the daytime
2. Your electrical energy charges and what you will get by promoting power again to the grid
3. The associated fee to put in photo voltaic

At Photo voltaic Selection now we have developed a free calculator to assist Australians estimate the monetary return in their very own circumstances. Utilizing this software now we have additionally generated the outcomes for some typical eventualities for a 4kW system throughout Australia.

Assumptions

1. Pricing comes from Photo voltaic Selection’s Value Index for October 2022
2. Assumes that family makes use of 20kWh per day and 60% of the power generated by photo voltaic is offered to the grid for a feed in tariff

Need to be taught extra? Attempt plugging some figures into our photo voltaic system ROI calculator your self! Self-consumption is simply one of many variables that may be adjusted to find out your probably payback time and return on funding. (Calculator outputs are indicative solely–please take into account that electrical energy charges and feed-in tariff charges might change over time.)

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