How Long Does Solar Installation Take in NSW?

A typical residential solar installation in NSW takes one full day on the roof — usually 6 to 8 hours — but the overall process from signing your contract to having the system actively exporting to the grid takes 2 to 6 weeks. Most of that time is paperwork and network approvals, not physical installation. Here's what the full timeline really looks like for Illawarra and South Coast homeowners.

The full solar timeline in NSW (sign to switched-on)

Here's the realistic end-to-end timeline we quote Illawarra customers at Coastal Solar Co.:

• Day 0: Site assessment and quote accepted
• Day 1–3: System design finalised, components ordered
• Day 3–7: Grid pre-approval application submitted to Endeavour Energy or Essential Energy
• Day 7–21: Waiting on pre-approval (fastest turnaround in 2026; Endeavour typically approves in 5–10 business days)
• Day 14–28: Install day booked, materials delivered to site
• Install day: 6–8 hours on a 6.6kW system; 10–14 hours or two days for 10kW+ with battery
• Install day +1: Certificate of Electrical Safety (CES) lodged, meter reconfiguration requested
• Install day +3 to +14: Smart meter reprogrammed or installed for bi-directional reads (if needed) — this is the step most likely to blow out the timeline
• Install day +14 to +28: System formally commissioned with the retailer; feed-in tariff activated

For most Illawarra customers with an existing smart meter, the entire process takes about 3–4 weeks. Homes that still have an old accumulation meter add 2–3 weeks for the meter swap.

What happens on installation day

Here's a realistic breakdown of a one-day install for a 6.6kW system in Wollongong:

7:00–8:00am: Arrival and site setup

The install crew (typically 2–3 CEC-accredited electricians) arrives, parks the truck, lays down tarps to catch debris, and sets up scaffolding or a safety rail system per SafeWork NSW requirements for anyone working above 2m.

8:00–11:00am: Roof work

Mounting rails are fastened to roof structure (tile hooks on tile roofs, L-feet on Colorbond), waterproofed flashings installed, panels lifted onto the roof and clamped into place, and DC cabling run to the junction point.

11:00am–1:00pm: Electrical work

The inverter is mounted — usually in a garage, on an external wall or in a cool undercover area. DC isolators are fitted at both the roof and inverter end, AC cabling is run from the inverter to your switchboard, and a new solar circuit breaker is installed.

1:00–3:00pm: Commissioning

The system is powered on, tested, and commissioned. The installer configures the inverter's monitoring, walks you through the app, and tests that the system is correctly exporting. Power to the home is usually only interrupted for 15–30 minutes during the switchboard work.

3:00–4:00pm: Handover and paperwork

Final site clean, compliance paperwork completed on-site, Certificate of Electrical Safety lodged, and your installer walks you through the monitoring app, isolator locations, and what to do in a blackout.

What adds time to a solar install

A few site and system factors can push a one-day job into a two-day job:

• System size over 10kW: More panels and DC cabling means a longer install. 13kW systems routinely go across two days.
• Battery storage: Adding a Tesla Powerwall 3, BYD Battery-Box, or Enphase IQ battery adds 4–8 hours on top of the solar install — often pushing to a second day.
• Complex roof: Multiple roof faces, steep pitch (over 30°), or two-storey homes in Austinmer, Stanwell Park or Thirroul require more time on safety setup.
• Tile roof with condition issues: Broken or cracked tiles need replacement before panels go on.
• Switchboard upgrade: Older homes (pre-1990) often need a switchboard upgrade to meet AS/NZS 3000 and AS/NZS 5033 standards. This adds 2–4 hours and usually costs $800–$1,500.
• Three-phase power: Slightly more complex cabling but rarely adds more than 1–2 hours.

Why the paperwork takes longer than the install

New solar owners are often surprised that the physical install is the fastest part of the process. The grid connection paperwork is where time disappears. Here's the sequence for Endeavour Energy (which covers most of the Illawarra and Shoalhaven):

1. Installer submits pre-approval application via PowerOn Advisory portal
2. Endeavour runs a network capacity check at your street's transformer
3. If capacity is fine — approval in 5–10 business days
4. If capacity is tight — export limiting may be required (approval still comes back in around 10–15 business days)
5. If a network upgrade is needed — rare in urban areas, can add weeks
6. Post-install, the CES is lodged and your retailer is notified to reprogram your meter for two-way reads

The metering step is worth highlighting. If your home already has a Type 4 smart meter, it can usually be reprogrammed remotely within a few days. If you still have an old accumulation meter, your retailer has to dispatch a technician to swap it — and in 2026, that wait is running 2–3 weeks across most of NSW.

Use our free Solar Savings Calculator to see your personalised payback period.

Can you speed the process up?

Yes — a few things help:

• Pick an installer who handles everything in-house. When design, grid application, install and CES are all done by one company, there are fewer handoffs and fewer delays.
• Supply your electricity bill quickly. Your NMI (National Metering Identifier) is needed for the pre-approval application — installers can't start that step without it.
• Check your meter type first. If you still have an analogue disc meter, request a smart meter upgrade from your retailer before the install. It's free under NSW rules.
• Avoid peak install seasons. December through February is the busiest period for Illawarra installers — lead times stretch to 6–8 weeks. Autumn and winter (April–July) are much faster, often 2–3 weeks from deposit to install.

Frequently Asked Questions

How long does a 6.6kW solar install take?

Around 6–8 hours on a single-storey home with a straightforward tile or Colorbond roof. Power is only interrupted briefly (15–30 minutes) while the installer ties the solar circuit into your switchboard. The system is usually generating electricity by the end of install day.

Do I need to be home during installation?

You need to be home at the start so the installer can access the roof, switchboard and preferred inverter location. You also need to be home at the end for the handover and to sign the CES and warranty paperwork. Between those, you can come and go — though there's a brief power interruption during the switchboard work that affects fridges and freezers.

Will my system work immediately after install?

Yes — the solar system starts generating and offsetting imports from the grid as soon as it's commissioned on install day. However, you won't receive feed-in tariff credits until your retailer reconfigures your meter for bi-directional reads, which can take 1–3 weeks after installation.

Does adding a battery take longer?

Yes. A battery install adds 4–8 hours on top of the solar install. For a combined 10kW + battery install, expect either a long one-day job (12+ hours with multiple crew) or a split across two consecutive days. We typically recommend splitting — it reduces installer fatigue and makes commissioning cleaner.

How soon can I get a Coastal Solar Co. install?

In autumn 2026, our install lead times are running 2–3 weeks from signed contract to install day, and another 1–3 weeks for meter reconfiguration. We handle all Endeavour Energy and Essential Energy paperwork end-to-end so you're not chasing forms.

Ready to get your personalised quote? Contact our CEC-accredited team — we'll call you back within 5 minutes.