How Many Solar Panels Needed to Power a Home? | Energy Matters

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.

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 installation location.

How big a solar power system you'll need
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.

Yet another option is to use our solar quotes system – it’s very quick and easy to use. By entering your electricity bill amount, a system will be generated to meet that consumption. After submitting for a quote, 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.


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