The Complete Guide to Buying Solar in NSW

Buying solar in NSW in 2026 is more straightforward than it's ever been — but there are still plenty of ways to overpay, under-spec, or end up with a system that doesn't perform. This guide walks you through every step of the process, from understanding what size system you need through to what happens on installation day and beyond.

Step 1: Work Out What Size System You Actually Need

The most common mistake first-time solar buyers make is choosing a system size based on what a neighbour got, rather than their own energy profile. In NSW, system sizing is driven by three factors: your daily energy consumption, your roof space, and your usage patterns.

Daily energy consumption: Pull out your last 12 months of electricity bills and find your average daily usage in kilowatt-hours (kWh). Most NSW households on the Endeavour Energy network use between 15kWh and 30kWh per day. High users — households with air conditioning, electric hot water, a pool pump, or an EV — typically sit at 25–35kWh.

Roof space and orientation: In the Illawarra and Shoalhaven, north-facing panels typically generate the most energy annually. East and west-facing panels generate roughly 15–20% less, but can be valuable for catching morning and afternoon sun respectively. A site assessment will determine exactly how many panels fit on your roof and how they should be oriented.

Sizing rules of thumb for NSW:

• A 6.6kW system (20 panels) generates approximately 25–28kWh per day on average in the Wollongong area
• A 10kW system generates approximately 38–42kWh per day
• A 13kW system generates approximately 48–54kWh per day

Don't over-size just because panels are cheap — there are grid export limits in NSW that mean very large systems (above 10kW single-phase) require additional approvals. Your installer will advise on what's practical for your property.

Step 2: Understand the NSW Rebate and Incentive Landscape

The federal Small-scale Technology Certificate (STC) scheme is the primary solar subsidy in NSW. It's applied as a point-of-sale discount by your installer — you never see it as a cash payment. In 2026, STC rebates are worth approximately:

• 6.6kW system: $2,800–$3,200 discount
• 10kW system: $3,200–$3,800 discount
• 13kW system: $3,800–$4,500 discount

The STC scheme reduces by one "deeming year" every January 1st, which means the rebate value drops slightly each year until the program ends in 2030. The practical impact in 2026 is relatively minor, but it's another reason not to delay unnecessarily.

Beyond the STC scheme, NSW homeowners adding battery storage can access the Cheaper Home Batteries Program (up to $2,000 subsidy) and may be eligible for Virtual Power Plant income once their system is commissioned.

Step 3: Getting Quotes — What to Ask and What to Watch For

The solar market in NSW is competitive, which is broadly good for consumers — but it also means some installers cut corners on equipment quality or post-installation support to win on price. Here's how to get a quote you can actually trust.

Always compare at least 3 quotes. Pricing for identical systems can vary by $2,000–$4,000 between installers in the same area. This isn't always a sign of quality difference — sometimes it's just margin — but sometimes it reflects genuine differences in panel brand, inverter type, or warranty terms.

What a good quote includes:

• Panel brand, model, and efficiency rating (look for Tier 1 panels from manufacturers like REC, Q CELLS, Jinko, or LONGi)
• Inverter brand and model (Fronius, SMA, SolarEdge, Enphase, and Sungrow are all reputable)
• Number of panels and system total capacity in kW
• Estimated annual generation in kWh (based on your specific roof and location)
• Net price after STC rebate applied
• Warranty terms: panels (typically 25-year product + performance), inverter (typically 5–10 years), installation workmanship (minimum 5 years)
• CEC accreditation of the installing electrician

Red flags in a solar quote:

• No mention of the specific panel or inverter brand
• Very short workmanship warranty (under 5 years)
• Verbal promises about savings that aren't backed up in writing
• Pressure to sign same-day with "today only" pricing
• No CEC accreditation mentioned

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

Step 4: Understand Your Grid Connection and Approvals

In NSW, solar installations require a connection application to your distribution network — either Endeavour Energy (if you're in the Wollongong, Shellharbour, or northern Shoalhaven area) or Essential Energy (southern Shoalhaven, including parts of Nowra and Ulladulla).

Your installer handles this on your behalf. For systems under 10kW single-phase, Endeavour Energy typically approves connections within 5–10 business days. Larger systems, or properties in constrained network areas, may require additional assessment — sometimes adding several weeks to the timeline.

For most residential properties in Wollongong LGA and Shellharbour LGA, you do not need council approval for solar panels installed on existing residential buildings, provided they don't protrude more than 900mm above the roof plane and meet noise requirements for inverters. Heritage-listed properties or those in conservation zones may have additional requirements — check with Wollongong City Council or Shoalhaven City Council before proceeding if you're unsure.

Step 5: What Happens After Installation

Installation day typically takes 4–8 hours for a standard residential system. Once the panels are mounted and the inverter is wired, your installer will commission the system and walk you through monitoring — most modern inverters have an app that shows you live generation data, consumption, and feed-in export.

After installation, your installer lodges the connection application with Endeavour Energy or Essential Energy. Until formal network approval comes through, your system may be running in a limited export mode or with a temporary meter arrangement. Your retailer will update your tariff to include feed-in credits once the connection is formalised.

It's also worth reviewing your electricity retail plan at this point. Some retailers offer significantly better feed-in tariff rates than others — and switching retailers after going solar can add meaningfully to your savings. Retailers like Amber Electric, Energy Locals, and GloBird Energy have been competitive in the Illawarra market, though rates change regularly and comparison tools like Energy Made Easy (run by the Australian Energy Regulator) give you the most up-to-date picture.

Frequently Asked Questions

How long does the whole process take, from quote to installation?

For most standard residential installations in the Wollongong and Shellharbour area, the timeline from accepting a quote to having panels on the roof is typically 3–6 weeks. This includes the network connection application process, which Endeavour Energy generally turns around within 5–10 business days. Larger or more complex systems — multi-phase, battery additions, or properties with switchboard upgrades — may take 6–10 weeks.

Do I need to be home on installation day?

Ideally, yes — at least for the start and end of the installation. The installer will need access to your switchboard (typically in the garage or meter box area), and it's worth being present for the commissioning walkthrough so you understand how your monitoring app works and what to expect in your first bills.

What if my roof needs repairs — should I fix it before going solar?

If your roof is nearing the end of its life, yes — it's worth addressing this before installing panels. Removing and reinstalling panels for roof work is an additional cost (typically $500–$1,500 depending on system size). Your installer will flag any concerns during the site assessment.

Can I add battery storage later?

Yes. Most modern hybrid inverters are battery-ready, and even string inverters can often be retrofitted with AC-coupled batteries like the Tesla Powerwall. If you're thinking about a battery in the next 2–3 years, tell your installer upfront — they can choose an inverter that makes the retrofit simpler and cheaper.

Is solar finance a good option if I can't pay upfront?

Solar-specific finance products exist that allow $0 upfront installation, with repayments designed to be covered (or largely offset) by your electricity savings. Whether finance makes sense depends on the interest rate, your current bill, and your planned tenure in the property. As a rough guide, if your finance repayments are less than your current electricity bill, you're cash-flow positive from day one. We can walk you through the numbers for your situation.

What maintenance does a solar system need?

Solar panels require minimal maintenance. In the Illawarra, where sea spray and coastal dust can accumulate on panels, an annual clean is advisable — either by rainfall (panels are typically self-cleaning on roofs with adequate pitch) or a professional clean for flat or low-pitch installations. Inverters should be checked annually for error codes, and the entire system should have a full inspection every 5 years. Most reputable installers include a first-year service check as part of their installation package.

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