How much ENERGY can a 5KW Solar System produce?

The power output of solar panels is, no doubt, one the most essential factor you need to know while getting solar PV system installed at your home.

Few solar companies are providing a set of unreal data with unreferenced numbers mentioned. Therefore, we drive our own research to provide you fully reliable and referenced information for you to consider.

In this blog we’ll provide an overview of typical power output that a user might expect per day while considering an investment on a 5kW solar system.

Why 5kw solar system?

Because 5KW Solar Systems are incredibly popular and cost-effective PV system catering the safeguard against future power cost elevations.

We encourage you to check its power output, the factors influencing it and understand how all the factors affect your 5kw solar panel output.

5kw solar system output per day

What is energy output?

The power output of a 5kw solar system is a measure of how big your system generation is, not how much energy it will generate. Similar to the case of a car engine, where the engine size gives indicates you how powerful it is, but doesn’t specifies how much fuel it will utilize, even though the two are interrelated.

Whether or not you have access to a solar feed-in tariff, you must know how many kWh (kilowatt-hours) you can expect to produce with a 5kw solar system.

Knowing this figure will definitely help you estimate the returns and savings you suppose to get from your 5kw solar panels.


What factors influence 5kw solar system output per day?

The initial factor influencing the amount of power output you will be able to produce is, no doubt, the size of your solar panel installation.

Larger size system (higher kW’s) installation will generate more electric energy, but if we check the exact effect of size, the amount of electricity your 5kw solar panels generate will depend on the amount of sunshine in your area.

5kw solar system output per day depends upon 8 factors:

  1. The amount of sunlight your solar panels are exposed to
  2. The intensity of the sunlight (depends on where you live)
  3. The orientation and tilt of your 5kw solar panel installation (optimized by your solar installer)
  4. The number of daylight hours (governed by where you live)
  5. Whether there are shadowscast over your solar cells (due to buildings, trees, etc.)
  6. Does intermittent shading obscure direct sunlight from hitting the roof?
  7. How big are the solar panels, and how efficient are the solar cells at converting energy
  8. The number of hours of full sun vs. cloudy days (governed by the area you live)

If we exclude factors [3] and [5], over which you have a complete degree of control then, your location in Australia is the major factor determining how much energy your 5kw solar panels will generate.

Therefore, a 5kW solar system in Perth will typically not generate as much power output over the year as the same system can produce in NSW.


Related: How many solar panels do I need for a 5kw solar system?

The figures for 5kw solar system output per day

Several studies have been conducted to find out the average figure of electrical energy in different locations around Australia taking all of the above factors into account.

These figures are given as:

The amount of power output (kWh) a 5kw solar PV system (grid connected) will produce on an average day is 25c/kWh.

Clean Energy Council (a body Government of Australian charges with accrediting solar cells, inverters and installers) is one of the most comprehensive sources providing this information.

Let us assume that your 5kw solar panels are clean and do not suffer from any shade effect placed nearby your inverter.

It’s simple maths…you multiply the peak sun hours for the Sydney (taken from Meteorology records) which is currently 5.15 hours per day average and multiply it by the actual output of your inverter (let’s say 5kw for convenience) which works out to 25.75kw per day.


(assuming 11c/kWh feed-in rate)


 @ 30% self-consumption  @ 50% self-consumption
 ~5.8 year payback  ~4.8 year payback
 ~17% IRR ~21% IRR
 ~$1,050 annual savings  ~$1,260 annual savings



(assuming 8c/kWh feed-in rate)


 @ 30% self-consumption  @ 50% self-consumption
 ~4.8 year payback  ~3.8 year payback
 ~20% IRR ~27% IRR
 ~$1,030 annual savings  ~$1,330 annual savings



(assuming 11.3c/kWh feed-in rate)


 @ 30% self-consumption  @ 50% self-consumption
 ~6.4 year payback  ~5.3 year payback
 ~15% IRR ~19% IRR
 ~$970 annual savings  ~$1,170 annual savings



(assuming 8c/kWh feed-in rate)


 @ 30% self-consumption  @ 50% self-consumption
 ~4.5 year payback  ~4.5 year payback
 ~22% IRR ~30% IRR
 ~$1,070 annual savings  ~$1,370 annual savings


Investigating this subject may let you reveal more credible and dependable sources of information, with slightly different numbers.

The National Renewable Energy Laboratory (NREL) of USA has a PV Watts tool which works for Australia too using the Australian meteorological data. It is a source great source for calculating the figures and estimating 5kw solar system power output per day.

Do check it out!

Certain research reveals that it’s likely not possible to put a put a clear and indisputable figure on the power output you’ll generate form a 5kw solar panels.

In fact, Dr Anna Bruce, Lecturer at the School of Photovoltaic and Renewable Energy Engineering at the University of New South Wales stated that – two different solar PV systems sized 5kW sitting side by side may generate different amounts of power output depending upon the quality and efficacy of the Individual components, also how well the 5kw system deals with temperatures and how the grid is operating.

Anna’s advice says that “5kWh/ in Sydney is certainly feasible if a system has optimal tilt and orientation and is running well”.

Therefore the Clean Energy Council considered this advice as a best guide and is one of the perfect and most comprehensive sources available, but because of the nature of solar, your 5kw solar system may generate more or a little less than the given figures.

5kw solar system output per day


Recommended: How much can 5kw solar systems save you?

Want to learn more?

Try our solar system ROI calculator to find some more figures yourself as self-consumption is just one of the factors can be accustomed to decide your probable payback time and ROI.

Ready to shop for solar?

Get a Free Quote solar & battery storage ASAP

5kw solar system output per day-SOLAR BEAM