Solar made simple

Start your solar journey here with our complete overview. If you would like more details, check out our FAQs.

Why solar?

Solar system costs have come down, interest rates are very low and attractive federal rebates are still available – the time to buy solar is now. Solar can pay back your investment in as little as three to seven years. After that you’ll be generating your own free electricity with high quality solar panels lasting 25 years or more.

Switching to solar power in our homes is one of the most important things we can do to reduce our emissions and do our bit for the planet. In the Sydney North suburbs approx 48% of residential emissions come from electricity use (Northern Beaches Council, Kinesis Report, June 2018).

How does solar work?

  1. Solar panels convert sunlight to DC electricity
  2. Inverter converts DC electricity to AC
  3. Switchboard and circuit breakers
  4. Take AC electricity for home use
  5. Smart meter
  6. Send excess solar electricity to the grid

What size solar system will I need?

Different homes need different sized solar systems. It’s easy to work out. On your most recent power bill look for your average daily usage in kilowatt hours (kWh). Compare your summer and winter usage to allow for seasonal variation. Then use the table to determine what size system you need.

Plan ahead

The trend is to electrify our homes and cars. So if you think you might buy an electric vehicle or install an electric heat pump in the future, oversize your system now, rather than adding more panels and a bigger inverter later.

And if you want to reduce your emissions even more, install as much solar as your roof and budget will allow.

Average household use per day in kWh’s Recommended solar system size in kW
15-25 5
25-40 7.5
40-55 10
55-80 12.5
80-100 15

Check out our solar packages

This price guide is for a standard installation and factor in the STC Federal Government rebate.1 You will receive a detailed quote after your home visit. There may be extra costs of up to 15% as each house is different.

1. Identify the size of system you need
1. Identify the size of system you need 5kW 7.5kW 10kW
2. Choose an inverter and panels
2. Choose an inverter and panels Sungrow inverter
& Suntech panels
$4,750 $6,750 $7,800
Fronius inverter
& LG Mono X Plus panels
$5,760 $7,460 $9,400
Solaredge inverter
& LG Mono X Plus panels
$6,000 $8,200 $10,300
SolarEdge inverter
& LG NeON H panels
$7,600 $10,550 $13,660
3. Choose a consumption monitor (optional)
3. Choose a consumption monitor (optional) SolarEdge $450 $450 $5702
Fronius $550 $550 $8402

1 Single storey house, corrugated colorbond roof, no split roofs. Prices current as of February 2021.
2 Three-phase single inverter quoted on all systems.


Batteries bring you further environmental benefits, energy autonomy and back-up during a power outage. Depending on when and how much electricity you use, batteries can make financial sense with a payback of between 7 to 10 years. Solarpro provides advice and a choice of several different batteries. Three popular models are:

  • Redback Smart – stores 7.2kWh of energy: from $9,200 (includes battery inverter)
  • LG Chem RESU10H – stores 9.3kWh of energy: from $11,500 (includes battery inverter)
  • Tesla Powerwall 2 – stores 13.5kWh of energy: from $14,750 (includes Gateway)

More information


The best option is to pay for your solar system upfront or add it to your mortgage and take advantage of the low interest rates. You can also take out a ‘green loan’ offered by some banks, with interest rates starting from approx. 5%.

Join us

Receive our newsletter or volunteer.

Get involved


We’re a Not-for-Profit run entirely by volunteers.

Help fund our work