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What can a 3kw solar system run?

A 3kW solar panel system can run most appliances found in a small home with 2 – 3 occupants.

It can produce up to 2500kWh per year which should be enough to run all the typical appliances you would find in 1 bath, 2 bedroom home.

There are 3 ways to work out if a 3kW system is right for you.

Hard way: Look at the appliances you have a what a 3kW system can power on average.

Easy way: Take your monthly power bill and look at the kWs’ of power consumed. If it is around 200kWh then this is a good size system for you.

Anymore and you will need to consider a larger system.

Appliances a 3kw system can run

Here’s an idea of what appliances you can run on a 3kWh Solar System.

Note: All consumption values refer to yearly average consumption for those appliances.

Fridge/Freezer: 150 to 190kWh
Dishwasher: 220kWh (considering 48 weeks and 5 weekly washes)
Coffee Machine: 30kWh (5 minutes use every day)
Microwave: 60kWh (1.5 hours a week)
Electric Oven: 150kWh (1,5 hours three times a week)
Induction Cooker: 210kWh (2 burners once a day)
LED TV: 20kWh
LED TV Standby: 2kWh
Games Console: 84kWh (2 hours a day)
Washing Machine: 180 to 270 kWh (200 cycles a year)
Computer & Monitor: 300kWh (4 hours a day)
Smartphone Charge: 7kWh (4 hours a day)

A 3KW Solar System that can produce 12kWh a day / 2500kWh a year on average will be able to annul a considerable part of your appliance’s consumption, therefore lowering your energy bill.

Another ideal way to find out how much a certain appliance consumes includes the use a power monitor that will tell you exactly how much you’re spending in real time. They are cheap and widely available.

How many panels will I need for a 3kw system?

The average solar panel is 250W, so to make up a 3kW system (3000w) we will need to install 12 panels. 12 x 250W = 3kW

3kW solar system = 12 Panels or 20m2

Each panel is on average 160cm x 100cm which is 1.6m2 per panel. This meads you will need about 20m2 of available roof space facing north to make a 3kW system available.

You should consider getting an installer out to have a look at your roof size and orientations to see if this will fit.

With today’s technology, your local solar installer is able to look at Google maps to see your roof size and orientation. There will be no need for a site visit.


What to consider

Panels should be installed by a professional to ensure all safety concerns a minimalized and optimal angle for solar energy production is achieved.
Also consider that no matter how much electrical power a Solar System produces, to ensure its effectiveness, the energy that it produces should be used in real-time. Any energy that is not used while the Solar Panels are producing energy will either go to waste or will be injected in the electrical grid.

To minimize loss of power, ensure to speak to your power company about how much they will pay you for energy produced, and whether getting a solar battery is right for you.

How much will a 3kw solar system produce?

If you have ideal sunlight conditions, that means that 12 x 250w Solar Panels can produce 12kWh a day on average.

What’s the average cost of a 3kw system?

The cost of solar installation will depend on the state you live (size of government rebate) and the quality of system you intend to install.

A 3KW Solar System installed will cost on average $3655. Below are the averages by state for a 3kW system.

3kW Price $3,690 $3,984 $3,860 $3,650 $3,010 $3,740

How long until a 3kW pays for itself?

Your 3KW Solar System is expected to pay for itself in as little as 3 years, though it will depend on how much energy you can actually produce and use.

Another consideration is how much of that energy is used in a smart way. Are you running washing machines and hot water heaters at noon when your system is producing most of its power?

Are you storing the energy for later use or are you getting a feed-in tariff from your energy supplier?

All these variables will influence how long it will take for your panels to pay for themselves and will differ from person to person, from household to household.

As mentioned before, Battery Backup Systems can be purchased to ensure you use the produced energy when there is no sunlight, but their elevated cost still doesn’t provide an effective return and is very often not advised for regular home usage. This is expected to change as solar battery prices fall over the next 3 – 5 years but at this stage they are too expensive.