The appropriate sizing of a solar power system to supply all a home’s electricity needs is one of the most common questions people considering buying solar panels ask. Energy Matters offers a number of tools and ways to help you determine the best sized system for your house and circumstances.
Compact Solar Calculator
Simply enter your postcode and how much you pay per quarter for electricity (even an estimate will do) and our compact solar calculator will display a recommended system. This will include details of how many solar panels you’ll need to slash your electricity bill by at least 50%, inverter sizing and estimated financial benefit.
Please note: the solar calculator may take up to 1 minute to produce results currently – we are working on speeding up the processing. As an alternative, try our instant solar quote application.
Solar Panel System Size At A Glance
The follow image displays grid connected solar panel systems suitable for various household sizes – and an estimate of what each system will power. It’s important to consider that even if you purchase an entry level (~ 1.5kW) package that won’t supply all your electricity needs, it will still reduce your power bills considerably – up to $800 in savings each year, depending on household size and installation location.
Download this system sizing infosheet (PDF)
Please note: the above assumes energy-efficient appliances in most instances and average use (or use as indicated). Also note that all solar panels are not equal. For example, a low quality panel may provide less output than labelled and may also deteriorate faster. Energy Matters only supplies quality components from reputable tier 1 and 2 manufacturers, such as REC – who, like Energy Matters, is a multi-award winning company.
Also bear in mind solar modules come in different sizes (wattages) – so how many solar panels you’ll need to power your house will vary depending on the module chosen. Output of a system will also be affected by location and installation orientation.
Another way to gauge how big a solar energy system you’ll need to power your home is to review our specials pages for your state – each package is accompanied by an indication of annual electricity savings, which you can compare to your current electricity expenditure.
Solar quoting system
Yet another option is to use our solar quotes system – it’s also very quick and easy to use. By entering your electricity bill amount and a few other details, a system will be generated to meet that consumption.
After submitting for a quote, as with the compact solar calculator above, you’ll be presented with a summary of a suitable system, including how many solar panels are needed to meet all your home electricity usage requirements; but with much more added detail.
You can also use our older solar panel calculator. After inputting your house location and average daily kilowatt-hour consumption, or appliance usage; details of a suitable system will be calculated, along with other useful information, including the solar
resources in area.
If you would prefer to determine what type and how many solar panels you’ll need for your home through an obligation-free phone consultation with our friendly solar experts, we can be contacted on 133-SUN (133 786).
Our team will assess your requirements, power consumption profile and consult satellite imagery to view your house’s rooftop in order to customise the best possible system for your situation.