Solar for households

Why choose solar?

Solar enables you to cut the cost of your bills. By generating your own electricity, you’ll be purchasing less from your retailer – meaning money in your pocket rather than theirs! Installing solar will also increase the energy rating and value of your house and you can feel good knowing you’re making a positive difference for the planet. Going solar simply makes sense.

Remember that solar generates when the sun is shining and if you can use the power at that time then you get it straight from your roof – For free!

Most households can benefit from solar but if you are unable to ever use electricity during the day or if you have very low use then the economic case for solar might not be as compelling as for higher users and those who can use the power during the day. For many people it can be as simple as turning your washing machine or dishwasher on in the morning, rather than the evening to make sure that you are making the most of the power when it is free (when the sun is shining). If you don’t use the power then it is sent back to the grid (the poles and wires) and will be used by someone else. You will receive a small credit for each kilowatt hour (kWh) that you send back to the grid. You will then need to buy power back from the grid later (which can be for up to 5 times the amount you were paid). Therefore even though you get a bit of a credit on your bill for the power you don’t use, the savings are much higher when you can use it and eliminate that cost from your bill.

Solar power is ideal for people who can use power during the day. For example:

  • Retirees
  • Young families
  • People planning for retirement
  • People who work from home
  • People who work part time
  • People who have to stay at home for health or other issues and their carers

What size do I need?

Finding the system that best suits your needs will depend on:

  • How much electricity you use (daily usage)
  • Your roof size, its orientation and shade
  • How many people live in your home and when they are home
  • Your budget

It is best to use as much as possible of the electricity your solar panels generate, rather than exporting it to the power grid. Remember: If you use the power directly from your panels, it’s free.

The table below provides rough estimates to help you consider what size system will work for you.

Rough guide

System size Solar starter
1.5kW
Solar couple
2kW
Family starter
3kW
Solar for 4
4kW
Serious solar
5kW
Recommended for Singles or energy smart couples Couples and retirees Energy-smart family Average family with two kids Big family
Daily solar power produced* 5.5kWh 7kWh 11kWh 14.5kWh 18kWh

* Average solar power generated each day, based on 3.6 solar hours. (You can compare this to your daily usage as a quick way of estimating how much of the electricity you use could be covered by solar power).

How much will it cost?

Solar systems typically range in cost from $3,500 – $8,000, depending on the system size and quality. Going solar has never been cheaper, with system prices having falling dramatically in recent years. You can also get a quote from the carefully selected Positive Charge solar supplier, to access exclusive discounts on a good quality system with extended warranties.

What other costs may be incurred?

If you don’t already have a smart meter then you will need to get one installed, which typically costs between $350 and $450. Older homes may also require an upgrade of the electricity switchboard, which will cost around $800.

Prices can be higher for non-standard installations, such as:

  • Two-storey homes
  • Tiled roofs
  • Difficult to access places
  • Homes with long distances between where the panels will be placed and the electrical switchboard
  • Flat roofs or roofs with inappropriate pitch.

Your energy distributor will also charge you a fee to reconfigure your meter, which is typically under $100. Any charges related to the upgrade of switchboard, meter changeover or meter reprogramming are additional to the cost of the solar PV system. It is recommended that you get in touch with your distributor to determine what additional costs will apply. Some electricity retailers will change your tarif,f i.e. how much you pay for the electricity you buy from the grid, when you install solar. If this is the case you can switch retailer after your installation. To find the best deal visit the Victorian Energy Compare website here.

Getting the best value from your system

To maximise savings the best thing to do is use your power when the sun is shining! Complementing this with other energy saving strategies will further drive down the cost of your bills. Some simple actions that we recommend are replacing halogen downlights with LEDs, as well as draught proofing and insulating your home. The team at Positive Charge can advise you on the best ways to save and you can check out our energy saving tips here.

What if it’s a shared roof space?

There are examples of residents in body corporates who have been able to install PV on their shared roof. Typically it is an involved process that requires the approval of the owner’s corporation. Smart Blocks is a useful resource for information about energy saving in the common areas of apartment blocks.

How long does it take to install?

After you confirm your quote the installation can usually be scheduled within 2-3 weeks. For most standard systems, the actual installation can be completed in a single day. For larger systems two days may be required.

Please note that once the system is installed you then have to wait for your electricity distributor to reconfigure your meter, which can take an additional 2-6 weeks. Unfortunately this is not something that Positive Charge or the solar supplier can do anything about but we are certainly advocating for a shorter time frame to be mandatory.

Will it require modifications to my home?

No. All the hardware required is installed with virtually no modification to your house. The framing kits are incorporated into your existing roof and the cables run inside the roof and walls where possible.

Will the system affect my existing roof?

The frames for the solar electricity panels are connected to your existing roof, so nothing will need to be altered.  For a tiled roof, some of the tiles are removed, brackets attached to the rafters in the roof, and then the tiles go back into place.  For a tin roof it is even easier because the frames are mounted directly to the roof.

How much roof area does it need?

For each 2kW system (approximately eight panels) you would need an area about 6.5m wide by 1.6m tall for a landscape layout, and 3.25m by 3.2m for a portrait layout.  You are not however restricted to just the portrait and landscape formats.  The layout of the panels can be configured in almost any way to meet your available roof area.  Please note this may incur additional costs.

Could the panels be damaged in a storm?

It is very unlikely that the weather can damage your panels. The panels are made with a low-iron tempered glass face and are specifically designed and certified to withstand large hailstones.  The aluminium frames are anodized for extra durability and long life.

All the panels used by our selected suppliers have been tested against Australian conditions.

Do I need to clean or maintain the panels?

Most people leave it to the rain to wash the panels but if there have been extended periods of dry weather it is worth considering giving the panels a clean. If there has been a dust storm or a particularly long dry summer then it is advisable to wash the solar panels down with warm water, to remove collections of dust, dirt and bird droppings. In small amounts these won’t have much effect on the output but over time a build up can reduce the effectiveness of the solar panel.

Can I mount the panels in any direction?

Facing due north is the ideal orientation, as it gets the majority of daytime sun throughout the year. However panels facing more east or west can still provide a high percentage of available power (perhaps 10–15% reduction).  East facing panels get morning sun and west facing panels get the afternoon sun (particularly in the seasons with longer days), so in some cases matching the position of the panels to generate when you are home means that an east/west orientation is more desirable.

The optimum tilt angle of the solar electricity panels is 20–25 degrees which makes standard roof pitches ideal, but if you have a low angle or flat roof, adjustable tilt frames can be used to bring the panels up to the ideal angle.

What happens in a power outage?

Your solar power system will instantly shut off if the grid fails. This is Australian law and is designed to protect electrical line workers.  When the grid power is shut off, the workers expect the lines to be dead so they can safely repair faults.  If your system keeps producing electricity, it can risk the lives of the line workers.  This also protects any electricians doing work within your home.

Heritage overlays

You may need a planning permit if you live in a heritage overlay area, particularly if the solar panels are visible from the street.  Please contact the planning department at your local council for advice as soon as possible.

What next?

We’re on hand to answer your questions. Give us a call or an email.

Get a quote today! We have worked hard to select a supplier that offers quality systems as a good price. They even offer a Price Match if you get a quote from another supplier for an equally good system at a lower price.

Fore more about our procurement visit our supplier page here.