Trade 30 of 33Updated May 2026

A research dossier · 41 NSW + 32 QLD + 31 VIC homeowner posts · rebate landscape verified per state

Hiring a Solar Installer
is one of the few jobs
where cheap is the warning.

Solar is the trade where a too-low quote is more dangerous than a too-high one. The components are commoditised, the rebates are public knowledge, and the labour rates are well-known — so a quote that's wildly under the rest of the market is almost always cutting on installer accreditation, panel tier, inverter warranty, or all three. The system goes on the roof for 25 years. Ten of those are spent regretting the cheap install.

25 yrs

How long the panels are supposed to last on your roof.

SAA

The installer accreditation that unlocks the rebate.

3 layers

Panel · inverter · installer warranty. Don't conflate them.

How this page was built

A research dossier, not a referral page.

Sources

Reddit (r/sydney · r/melbourne · r/AusFinance · r/solar), Whirlpool, Solar Quotes forum, the Clean Energy Council retailer code, SAA installer database, state rebate scheme rules.

Verification

Every dollar range cross-checked across three current installs in three states. Rebate amounts verified against CER + state portals. Mistakes corrected with a date-stamped note.

Funding

No installer pays for placement here. No referral fees. Funded by the supply-side flyer service at flyers.needatrade.com.au.

Before we start

The cheap quote isn't a saving.
It's a deferred bill.

Solar pricing is the most transparent on this site — every component has a published wholesale price, every rebate amount is on the regulator's website, every install rate is on installer forums. So a quote that's 50% under the market is telling you which corner the installer cut: panel tier, inverter brand, installer accreditation, isolator quality, or compliance shortcuts.

The 10 questions below force the math into the open. A working installer welcomes them — they earn their margin on real components done properly. A discount-shop installer stalls — the cheap quote depends on you not asking.

Read the 1-star reviews before the 5-star ones. They tell you what year-three actually looks like.

How much should it really cost?

Solar pricing is published, audited and rebated. So the question isn't "what's a fair price" — it's "what's hidden in the cheap quote."

Read the 1-star reviews. They often reveal the stuff that really matters: ghosting customers, shoddy work, or warranty nightmares.

WhirlpoolNSW solar thread

A solar quote should split into six lines. If they're shown as a single "after-rebate" number, that's the line you can't compare with anyone else.

The six lines you should see, written down

1Panel brand + model + tier. Tier 1 from the BloombergNEF list. Wattage per panel. Number of panels.
2Inverter brand + model + warranty. SMA · Fronius · Sungrow · GoodWe · Enphase — quality varies. 10-year inverter warranty is the baseline.
3Mounting hardware + isolators. Cheap rails + DC isolators are the most reported failure point. Brand matters.
4Labour + design. Including the CES design, electrical wiring, grid connection paperwork.
5STC rebate. Federal small-scale technology certificate value applied to the price. Calculated by system size + zone.
6State rebate / battery rebate (if applicable). VIC Solar Homes, federal Cheaper Home Batteries, etc. Stack with STC where eligible.

Indicative ranges · post-STC rebate

AU 2026

6.6 kW system (Tier 1 panels · quality inverter)	$6,500 – $9,000
10 kW system	$9,500 – $13,500
13.3 kW system (properly installed)	$12k – $16k
13.3 kW system (too cheap to be safe)	under $8k
5 kWh battery retrofit	$5,000 – $8,500
10 kWh battery retrofit	$9,000 – $14,500

Indicative. Tile roof, three-phase, complex switchboard upgrade, or strata = upper end. State rebates (VIC, others) stack on top of STC.

Ask this, exactly

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"Can you send me the panel brand + model + tier, the inverter brand + model + warranty, and the labour line — separate from the STC rebate?"

How to tell a real one from a cowboy.

The solar villain isn't a door-knocker. It's the phone-room operator selling a "13.3kW system for $5,991" they'll subcontract to a $200/day installer using whatever panels are cheapest this week.

Red flags — in order of how often you'll meet them

!
A quote 30%+ under the market
Solar costs are public. A quote miles under everyone else is cutting on panel tier, inverter brand, installer wage, or compliance. Not "finding savings."
!
Won't name the panel brand or inverter brand
"Premium Tier 1 panels" without a brand name = whatever's in the warehouse the day they install. Same with "European inverter."
!
Phone sales + "today only" rebate pressure
STCs and state rebates have clear, published end dates. Anyone telling you the "deal expires tonight" is using the sales script, not the actual rebate timeline.
!
No on-site inspection before quote
Roof type, shading, switchboard capacity, meter location — all decide the real quote. A phone or satellite-only quote is best-case fiction.
!
Battery upsold without modelling
A working installer shows your last-12-months usage data, models the battery payback honestly, and tells you if it doesn't make sense yet. The cowboy upsells the battery to anyone with a credit card.

The verification routine — 10 minutes, free

✓
SAA installer accreditation on the SAA register. Search by name. Required for STC rebate.
✓
Electrical licence (CCEW NSW · COES VIC · ESO QLD) — solar is electrical work. Both accreditations needed; not the same person required, but both must be on the job.
✓
NETCC-approved retailer for the warranty cover. Check the Clean Energy Council retailer list.
✓
ABN + ASIC company history. Phoenix companies are common in solar. Director's previous companies tell the story.
✓
On-site inspection before the quote. Roof type, shading, switchboard. Not a satellite-only estimate.

Ask this, exactly

"Can you send your SAA accreditation number, the electrical licence of whoever's doing the install, and confirm you're on the CEC's approved retailer list?"

What accreditation should you receive?

Solar has more layers of accreditation than any other trade — and most homeowners can't name which one matters. Here are the three that do.

SAAInstaller

Solar Accreditation Australia

The person physically on the roof. Required for any system that claims the STC rebate.
Has a unique accreditation number. Search the SAA installer database to verify.
"Designer" and "installer" are separate accreditations — many people hold both.
Check solaraccreditation.com.au.

NETCCRetailer

CEC Approved Retailer

The business selling the system. Signed up to the New Energy Tech Consumer Code.
Commits to specific warranty + customer service standards.
Required for some state rebates (VIC Solar Homes, etc).
Check the CEC retailer list.

ElectricalState licence

State Electrical Licence

Solar IS electrical work. NSW: CCEW. VIC: COES. QLD: ESO certificate.
Required for grid connection, switchboard work, isolator installation.
Separate from SAA — both are needed.
Check the relevant state register.

Half-time

In solar, cheap is the warning.

Quote anatomy, the cowboy test, the accreditation. The first three sort the genuine installers from the phone-room operators. The next seven are how you tell the working installers apart from each other — and how the system on your roof still works in 2046.

Rebate timing — and the pressure.

The STC rebate steps down each year — typically the value drops at end of December. State rebates have their own clocks. So the "rebate ending" line you hear on the phone is sometimes true. But the real question is whether the rebate timing should drive YOUR decision, or only the salesperson's quarterly target.

STC clock.

Federal STC value reduces annually — published years in advance. Step-down dates are on the CER website. Not "today only."

State rebate clock.

VIC Solar Homes, federal Cheaper Home Batteries — each has its own published timeline + eligibility. Check the state portal, not the salesperson.

Build window.

8–14 weeks from contract to commissioning is typical. Grid connection paperwork is often the bottleneck.

A working installer tells you the real rebate timeline and lets you decide. A cowboy says "you'll lose $3,000 if you don't sign tonight." If your gut says you're being pressured, you are.

Ask this, exactly

"What's the actual published step-down date for STC, and how much do I lose if I sign next month instead of this week?"

What happens next, step by step.

1Step

Usage data + site visit

12-month usage data from your retailer. On-site roof check, shading, switchboard capacity, meter location.
2Step

System design + quote

System size based on usage + roof. Panel + inverter brands named. STC rebate calculated. All in writing.
3Step

Contract + grid pre-approval

Network operator (Ausgrid · Energex · Powercor etc) pre-approves the connection. Required before install.
4Step

Install day

Panels mounted, inverter installed, isolators wired, switchboard updated, electrical safety tested.
5Step

CES/CCEW + grid connection

Compliance certificate issued and lodged. Grid connection paperwork submitted. Smart meter reconfigured if needed.
6Step

Commissioning + monitoring

System turned on. Monitoring app set up. Warranty documents handed over. Owner walked through.

PV only, PV + battery, or wait?

The decision most installers upsell past. Batteries are still expensive — sometimes they pay back, sometimes they don't. Honest modelling against your usage is the only way to tell.

Option A · most economic

PV only

Panels + inverter, no battery. Excess power exported for feed-in tariff. Payback typically 4–7 years.

Right when: most consumption is daytime, or feed-in tariff is acceptable in your network.

Wrong when: heavy evening/overnight use + low feed-in tariff (some networks now near zero).

$6.5k – $14k

Post-STC · 6.6–10 kW

Option B

PV + battery

Solar plus storage. Excess daytime energy stored for evening use. Payback typically 8–15 years (longer with current battery prices).

Right when: heavy evening use, low feed-in tariff, want backup during outages, federal battery rebate applies.

Wrong when: payback maths doesn't work for your usage. Get an honest model.

$14k – $28k+

Post-STC · 6.6 kW + 10 kWh

Option C

Wait

Don't install yet. Sometimes the right answer — roof needs replacing first, planning a move, battery prices about to drop.

Right when: roof is 25+ years old, selling the house within 2 years, currently low energy use.

Wrong when: stable house, increasing bills — every year of waiting costs you the rebate step-down + lost generation.

But not free

Warranty — five different clocks.

Solar warranty is the most complex on this site. Five separate clocks — and a brochure that says "25-year warranty" is glossing over four of them. A working installer hands you the warranty PDF from each manufacturer separately.

Layer 01

Panel product warranty

Typically 10–15 years on manufacturing defects. The cheap-tier panel often has the shortest product warranty.
Layer 02

Panel performance warranty

25 years typical — guarantees a minimum percentage of original output by year 25. The "25-year warranty" claim.
Layer 03

Inverter warranty

5–10 years standard. SMA / Fronius offer 10+. Cheap inverters fail at year 6 and aren't under warranty.
Layer 04

Installer workmanship

CEC code requires 5 years minimum from a CEC-approved retailer. Cheaper installers often offer 1–2 years.
Layer 05

Battery warranty

10 years + cycle warranty typical. Often tied to specific cycle count + minimum capacity at year 10.
Backstop

CEC Approved Retailer cover

If your installer disappears, CEC code covers the workmanship element. Required for some state rebates.

Ask this, exactly

"Can you send the warranty PDFs for the panels (product + performance), the inverter, and your own workmanship — separately, with year limits in writing?"

Roof, shade, and the grid.

Suburb effects on solar are real and physical — not snobbery. The roof itself decides how much your system actually produces.

Roof orientation
North-facing roofs produce ~15% more than east/west. South-facing roofs almost halve the output. The installer should model your roof, not assume.
Shading
A single tree or chimney shading panels for 2 hours/day cuts that string's output. Microinverters or optimisers (DC) cost more, recover the loss.
Network operator
Ausgrid · Endeavour · Energex · Powercor · Jemena — each has different export limits, smart meter rules, and feed-in tariffs.
Roof age + material
A 25-year-old tile roof under solar is a disaster waiting to happen. Pre-solar roof check is worth $300 to avoid $20k of grief.

Travel surcharges for solar are common — installers based in metro areas charge a per-km fee for regional installs. Honest installers publish their zone.

Ask this, exactly

"What's my expected annual output given my roof orientation + shading, and what network operator restrictions apply?"

Edge cases — get a second opinion for…

Flat / low-pitch roof

Tilt frames required. Adds cost and engineering. Some retailers refuse to quote.
Tile roof (especially old)

Tiles break during install. Pre-solar roof check essential. Many installers refuse jobs on roofs > 20 years.
Strata / townhouse

Owners corporation approval, common-property roof issues. Some strata schemes have blanket no-solar rules.
Heritage overlay

Council may restrict panel visibility from the street. Black-on-black panel options exist but cost more.
Three-phase upgrade needed

EV + solar + battery often pushes single-phase past limits. Three-phase upgrade can add $5k–$15k.
Switchboard upgrade needed

Old boards may not support an inverter. Switchboard upgrade is a separate quote — make sure it's in the all-in number.
Battery retrofit to existing PV

AC-coupled vs DC-coupled. Existing inverter may not be compatible. Honest modelling required.
Pool heating integration

Pool pump load can be timed to solar generation. Specialist install, not standard.
Pre-solar roof check

Worth $300 to know before $20k of panels go on a 25-year-old roof.

After they leave.

Solar aftercare is about two things: monitoring whether the system is producing what it should, and being able to make a warranty claim when something fails. A working installer sets up both. A cowboy hands you a login and goes silent.

Monitoring app + baseline.

Inverter monitoring set up. Expected annual generation in writing. First-month check confirms reality matches model.

Warranty pack handed over.

Panel manufacturer warranty, inverter warranty, installer workmanship warranty, CEC retailer cover. All in a folder.

Compliance certificates.

CCEW/COES electrical certificate, grid connection approval, STC paperwork. Required at sale.

5-year maintenance check.

Optional but recommended — clean panels, check DC isolator (the most common failure point), test inverter. ~$200.

Ask this, exactly

"Will I receive the monitoring app, all warranty PDFs, the CCEW/COES, and a 5-year maintenance plan — at handover?"

If you've read this far

A solar installer who can name the panels, the inverter, the warranties — without flinching — is not a unicorn. It's the bar.

We can introduce you to installers in your area who already work this way — SAA accreditation, CEC retailer status, honest battery modelling, named brands. No phone-room sales. No paid placement.

✓ We don't take referral fees✓ Verified means answers all 10✓ No spam. No upsell.

Find a vetted solar installer PV · battery · EV-ready

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Trade 30 of 33.

Hiring a Solar Installeris one of the few jobs where cheap is the warning.

A research dossier, not a referral page.

The cheap quote isn't a saving.It's a deferred bill.

PV only

PV + battery

Wait

A solar installer who can name the panels, the inverter, the warranties — without flinching — is not a unicorn. It's the bar.

Hiring a Solar Installer
is one of the few jobs
where cheap is the warning.

The cheap quote isn't a saving.
It's a deferred bill.