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Solar Panel Replacement Cost Calculator (Australia)

Free Australian solar panel replacement cost calculator. Estimate per-panel labour, materials, CEC recycling fee and call-out cost and compare against a full new CEC install.

Solar Panel Replacement Cost Calculator

Material cost
$664
Labour cost
$645
Disposal cost
$110
Total replacement cost
$1,419
Cost per panel replaced
$284
Cost per replaced watt
$1/W
Full new-system equivalent
$2,283
Replace vs full system
62.2%

How to use this calculator

Eight inputs and you get a CEC-realistic quote breakdown plus a comparison against the current new-system installed price per watt:

  1. Panels to replace — number of failing or underperforming modules.
  2. New panel wattage — typical 2026 tier-1 modules sold via CEC channels are 410 W to 440 W.
  3. New panel price (A$/W) — wholesale runs A$0.28 to A$0.38, retail with markup A$0.32 to A$0.42.
  4. Labour hours per panel — first panel takes 1.5 hours including setup; subsequent panels 0.7 to 0.9 hours on a single visit.
  5. Installer labour rate (A$/h) — billed van rate, typically A$80 to A$95 in Australian capitals.
  6. Disposal fee per old panel (A$) — A$15 to A$25 at PV Stewardship Scheme partner.
  7. Call-out / truck fee — fixed one-off, A$180 to A$280 in most metros.
  8. New full system reference (A$/W) — current CEC-installed cost of a fresh residential array, about A$1.00 to A$1.20/W after STCs (SunWiz Solar Insiders Q1 2026).

The calculator returns material, labour, and disposal subtotals; total cost; cost per panel; cost per replaced watt; and the percentage of an equivalent new CEC install.

The formula

material   = panels × watts × pricePerW
labour     = panels × hoursPerPanel × rate + callout
disposal   = panels × disposalFee
total      = material + labour + disposal
perPanel   = total / panels
perW       = total / (panels × watts)
fullNew    = panels × watts × newSystemPerW
verdictPct = total / fullNew × 100

Worked example for 5 panels at 415 W with A$0.32/W material, 1 hour labour each, A$85/hour, A$22 disposal, A$220 truck fee, and a A$1.10/W new-system benchmark:

  • Material = 5 × 415 × 0.32 = A$664
  • Labour = 5 × 1.0 × 85 + 220 = 425 + 220 = A$645
  • Disposal = 5 × 22 = A$110
  • Total = 664 + 645 + 110 = A$1,419
  • Per panel = A$283.80
  • Per replaced watt = 1,419 / 2,075 = A$0.68/W
  • Full new equivalent = 2.075 kW × A$1.10 = A$2,283
  • Verdict = 1,419 / 2,283 = 62% — borderline, partial still wins

A 62 percent verdict means partial replacement saves roughly 38 percent compared with a fresh CEC install of the same 2.075 kW slice. Cross 70 percent and a full new system becomes the better commercial outcome because STC rebate revives, the inverter is brand new, and the warranty resets to 25 years.

Australian cost drivers

Material price per watt (tier-1 monocrystalline, distributor pricing into Australian trade, Q1 2026):

StateA$/W material
NSWA$0.30 to A$0.36
VICA$0.30 to A$0.36
QLDA$0.30 to A$0.38
SAA$0.30 to A$0.36
WAA$0.34 to A$0.42 (freight surcharge from east coast)
TASA$0.36 to A$0.44 (Bass Strait freight)
ACTA$0.30 to A$0.36
NTA$0.36 to A$0.44

Labour rates (CEC-accredited residential installer, blended van rate):

  • Sydney, Melbourne CBD belt: A$90 to A$110/h
  • Brisbane, Perth, Adelaide CBD belt: A$80 to A$95/h
  • Regional VIC, regional NSW, Gold Coast hinterland: A$75 to A$90/h
  • TAS, NT, regional WA: A$85 to A$105/h (travel surcharge)

These figures track hipages, Service.com.au, and SunWiz contractor data. They include the full van burden, not just the technician’s wage.

When the manufacturer warranty is worth chasing

Three failures that almost always trigger a successful warranty claim:

  • Hot spots and microcracks in IR thermography — your installer’s drone IR scan shows a 25°C delta versus neighbouring cells. The manufacturer ships a replacement; you pay only labour.
  • Power below linear warranty curve — measured with a clamp meter at full sun. A 10-year-old panel measuring 85 percent of nameplate against a 0.5 percent/year linear curve (which would be 95 percent at year 10) has a clear claim.
  • Visible delamination, encapsulant browning, snail trails, or junction-box failure — explicit product warranty triggers in every tier-1 manufacturer’s terms.

What is not covered: hail (your home and contents insurance), cockatoo damage (insurance with garden cover, common in SA and VIC), and lightning (insurance). For lightning specifically, claim through home insurance first — the deductible is typically lower than the labour cost of replacement, and the panel will need replacement either way.

For end-of-life on the panels coming off the roof, see the solar panel recycling cost calculator. For soiling that may not need full replacement, the solar panel cleaning cost calculator helps decide.

Reading the CEC installer’s quote

A 5-panel replacement quote should break down roughly as:

  • Modules (panels + new mid-clamps): 40 to 55 percent
  • Labour (CEC installer + roofer + commissioning): 25 to 40 percent
  • Disposal / PV Stewardship gate fees: 4 to 10 percent
  • Truck roll / mobilisation: 8 to 18 percent
  • Network notification (capacity uplift only): 0 to 5 percent

If labour exceeds 55 percent, either the roof has access difficulties (steep tile, third storey, integrated array) or the installer is padding. Terracotta and concrete tiles add roughly 25 percent labour over Colorbond steel because each tile must be lifted and re-bedded. Colorbond is the fastest to swap. In-roof BIPV systems are the most expensive — expect A$450 to A$650 per panel.

For capacity uplift beyond the existing CEC-registered rating, the DNSP (Ausgrid, Energex, Endeavour, Jemena, Powercor, AusNet, etc.) requires a fresh connection application — adds A$80 to A$400 in network fees plus 6 to 10 weeks. See the solar permit cost calculator for current DNSP fee ranges.

When to walk away from partial replacement

Run two scenarios in the calculator:

  1. Partial replacement at A$0.32/W material and your installer’s labour rate.
  2. Full CEC-installed system at A$1.10/W (or your most recent SolarQuotes / Solar Choice quote).

If partial replacement comes in below 50 percent of the equivalent new install for the affected capacity, replace the panels. Between 50 and 70 percent, weigh the age of the rest of the system and remaining warranty. Above 70 percent, the full new-system route generally wins because of the fresh STC rebate, new inverter, modern higher-current modules, and a clean network connection.

For systems older than 15 years where the inverter is also near end-of-life, full replacement also re-establishes the 25-year manufacturer warranty and qualifies the new install for current feed-in tariffs (NSW Origin 8c/kWh, VIC AGL 6.7c/kWh, QLD Energex 8c/kWh, SA Simply Energy 12c/kWh) — a panel-only swap does not change the tariff arrangement.

Sources

Frequently asked questions

How much does it cost to replace a solar panel in Australia?
A single replacement 415 W panel through a CEC-accredited installer runs about A$220 to A$380 fitted. Material is roughly A$130 to A$170 at A$0.30 to A$0.38 per watt wholesale, labour 1 hour at A$80 to A$95 (van rate), and A$15 to A$25 disposal under the National PV Stewardship scheme. The first panel always carries the truck-roll fee (typically A$200 to A$250) — replacing 4 to 6 panels on one visit is much cheaper per unit than two separate call-outs.
Will replacing panels affect my STC entitlement or feed-in tariff?
Like-for-like replacement does not generate new STCs — those were paid at original install. Capacity uplift (replacing 320 W with 415 W modules) creates a new system rating that the CEC installer must lodge through the Clean Energy Regulator's REC Registry, and any net capacity gain qualifies for new STCs. Feed-in tariff arrangements vary by state: NSW and VIC tariffs are based on the meter, not panel count, so swaps don't affect payments. Premium tariff customers (legacy 44c/kWh in VIC, 60c/kWh in SA) should check the original agreement — most allow like-for-like but penalise capacity increases by moving you to the current low rate.
Does the manufacturer warranty cover replacement?
Tier-1 manufacturers sold through CEC channels (Jinko, Trina, REC, LONGi, Q CELLS, Risen, SunPower) cover a free replacement module for 12 to 25 years product warranty plus a 25 to 30 year linear power warranty (output above 80 to 92 percent). Labour and shipping are almost never covered. Expect A$300 to A$500 per panel in labour on a successful warranty claim even when the module itself arrives free. Always lodge the failure through the original installer — direct manufacturer claims via the CEC complaints process are slower.
Should I replace one panel or upgrade the whole system?
Replace just the bad panels if the original modules still produce above 90 percent of nameplate and the system is under 12 years old. Beyond that, mixing a new 415 W panel with a 7 to 10 year old 280 W string mismatches the string current — the new panel is clipped to the weakest module. Full system replacement makes sense when the original wattage is more than 25 percent below current ratings, when more than 30 percent of the array has failed, or when the inverter has reached end-of-life. Run the verdict figure below — anything above 70 percent of new CEC-installed cost means walk away from partial.
Where do old solar panels go in Australia?
Solar PV is classified as e-waste in all Australian states under the National Television and Computer Recycling Scheme — Victoria has banned solar modules from landfill since 2019, NSW and SA since 2021. The CEC's National PV Stewardship Scheme coordinates registered recyclers (Reclaim PV in Brisbane and Adelaide, Lotus Energy in Melbourne, Ecocycle in Perth). Gate fees run A$15 to A$25 per panel. Your CEC installer should include this line item in the quote — DIY disposal at a tip is unlawful in VIC, SA, NSW, and ACT.

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