Solar panels in Wentworthville

As an estimate, a 6.6kW system comes to about $3,990, a 10kW to about $5,490 and a 13.2kW to about $7,990, with the STC discount for postcode 2145 already taken off. Those are typical figures for a straightforward install, not a fixed price. Housing here spans a wide range of ages, so a switchboard upgrade is the most common addition — and it should appear in the quote rather than on the day.

Wentworthville is in STC Zone 3, rating 1.382. In 2026 a 6.6kW system creates 45 certificates, worth roughly $1,710 off the price, and a 10kW system 69 certificates, roughly $2,622. It is a discount applied at the point of sale, not a grant you apply for afterwards — so if anyone describes it as a government payment you need to claim, be careful with the rest of what they tell you.

Four checks, none of which takes long. Ask for the CEC accreditation of the person who will actually be on your roof, not just the company's membership — accreditation belongs to an individual electrician and can be verified. Ask who is doing the install, since sales and installation are often different businesses, and get the installing company's name in writing. Check the quote names the panel and inverter make and model rather than describing them as tier one. And be wary of a large deposit; a modest one is normal, most of the money belongs at completion.

Take the paperwork, not the pen. There is nothing wrong with door-to-door sales in itself, but the combination of an unsolicited visit, a price that expires today and a request to sign on the spot is the pattern worth refusing every time. A genuine price is still there tomorrow. You are also entitled to a cooling-off period on unsolicited sales in Australia, and anyone discouraging you from using it is telling you something useful about themselves. If an offer looks too good, ask what panel and inverter it uses and how many kilowatts it actually is — cheap systems are usually cheap because they are small, not because someone found a discount.

System size in kilowatts, the panel make, model and count, the inverter make and model, the total price with the STC discount shown, what is included, and what would cost extra — a switchboard upgrade, difficult access, a long cable run. It should also state the warranties separately: product, performance and workmanship are three different promises. If a quote is a single number on a page, you have nothing to compare and nothing to hold anyone to.

Then who you contracted with matters more than any brochure. If the salesperson was one company, the installer another and the finance a third, work out now which of them you would call. With us it is one number and the same business. That is not a reason to pick us — it is a reason to ask any installer the question before you sign, and to be uneasy if the answer takes a while.

The distribution network that owns the poles and wires in your street approves it — not your retailer — and we lodge the application for you. That network also decides how much your system may export: on a flexible export connection, eligible customers can send up to 10kW per phase back to the grid most of the time, while a fixed export limit caps exports at 1.5kW. An installer who cannot explain which applies to your address has not done this part before.