Solar panels in Dapto

As an estimate, a 6.6kW system starts from $7,410, a 10kW system starts from $10,300 and a 13.2kW system starts from $11,250 (with battery prices starting from $4,290), with the STC discount for postcode 2530 already taken off (incl. GST for metro areas; regional areas subject to freight and travel costs). Those are starting estimates for a straightforward install, not a fixed price. Housing across the 2530 postcode ranges from post-war cottages to new estates at Haywards Bay, so the switchboard and the roof type vary more here than in a single-era suburb — we confirm both before quoting.

Dapto is in STC Zone 3, rating 1.382 — the same zone as Sydney, so the rebate maths is identical. 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. The discount shrinks each January until the scheme ends in 2030.

Close, and we would rather be straight about the limits of our own numbers than pretend otherwise. The 4.1 kWh per kW per day figure we model with is a Sydney-region average, last verified 2026-06-22, and it is what our calculators use for the whole state. The Illawarra coastal plain is broadly similar, but the escarpment and coastal cloud make local conditions their own thing — a roof at Dapto and one at Kanahooka can differ more from each other than either differs from Sydney. That is why the quote is based on your roof, and why we would not hand you an annual figure to four significant figures and call it a forecast.

The panels themselves, very little — they are glass and aluminium, built for the weather. The mounting hardware is where proximity to salt air matters, because fasteners and rails live outside for 25 years and corrosion is cumulative. The relevant standards treat coastal and marine environments as their own case, and the fix is straightforward: appropriate grades of stainless and aluminium, no mixed metals in contact, and hardware rated for the exposure. Dapto sits back from the open ocean, which helps, but Lake Illawarra is still salt water. Ask any installer what grade they are using; a good one will know without looking it up.

Not usually in a way that changes the decision, but it changes the shape of the day. The ridge sits to the west, so where it has an effect it is on late-afternoon sun in winter, when the sun is low and already behind it early. Properties closer to the foot of the escarpment feel it more than those out towards the lake. We look at the winter sun path at the assessment rather than judging by a clear morning in February, and if the afternoon is compromised we will weight the array east rather than pretend otherwise.

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. The same network covers the Illawarra and much of western Sydney, so the rules here are the ones set out on our Macarthur and Western Sydney pages.

Yes. We cover the whole 2530 postcode, including Kanahooka, Brownsville, Koonawarra, Haywards Bay. The pricing, the process and the connection paperwork are the same right across it.