Solar Design Software Australia in 2026: 5 Tools Compared

Solar design software in Australia has to handle a different rulebook than the US or EU. CEC-accredited installers ship designs that pass AS/NZS 5033 (PV array installation), AS/NZS 4777.2 (inverter grid connection), and AS/NZS 3000 (the Wiring Rules), plus the STC (Small-scale Technology Certificate) rebate maths, state-by-state feed-in tariffs, and increasingly a time-of-use proposal because daytime FiTs in NSW, Victoria, and South Australia keep dropping. The international platforms (Aurora, HelioScope) treat the AU market as a secondary geography. OpenSolar is reasonable but shallow on shading at the lower tiers. The desktop incumbents (PVsyst) skip the proposal and the rebate.

The 2026 answer for most Australian installers is SurgePV. AS/NZS 5033 + 4777.2 + 3000 code rule library, STC auto-calc, state feed-in tariffs, ToU modelling, AI 3D roof, and 8,760-hour bankable simulation in one cloud workflow at AUD-equivalent pricing that runs roughly a third of Aurora's per-seat cost. This guide compares SurgePV against OpenSolar, Aurora Solar, HelioScope, and Pylon, the five tools Australian installers are evaluating most.

Key takeaway. The best solar design software in Australia for 2026 is SurgePV. AS/NZS 5033 + 4777.2 + 3000 coverage, STC + state FiT modelling, AI 3D roof, 8,760-hour bankable simulation, and white-label proposals from $1,299 per user per year at the 5-seat tier, roughly AUD 1,960.

What Australian solar design software has to ship

CEC accreditation, STC eligibility, and DNSP (Distribution Network Service Provider) approval all sit on top of three Australian Standards. Your software needs to cover all of them or you copy-paste between tools.

1. AS/NZS 5033 (PV array installation). DC array design, string sizing, isolation, earthing, signage, structural mounting. The single most-cited standard in CEC audits.
2. AS/NZS 4777.2 (inverter grid connection). Grid-interactive inverter requirements. Anti-islanding, voltage and frequency response, ramp-rate controls, power quality.
3. AS/NZS 3000 (Wiring Rules). AC side cabling, OCPD, switchboard requirements, RCD protection.
4. STC rebate auto-calc. Small-scale Technology Certificate quantity by system size, postcode zone (1 to 4), and deeming period. Drives the upfront discount on every residential job.
5. State feed-in tariff + ToU. NSW, VIC, QLD, SA, WA, ACT, NT, TAS all run separate FiT structures. ToU (time-of-use) and demand tariffs increasingly dominate the export side of the proposal.

International tools usually stop at IEC standards and skip the STC and FiT side. AU-only tools cover STC and FiT but skip the 8,760-hour bankable simulation. SurgePV is the cloud platform built to cover both, NEC-IEC-AS/NZS-IS code in one license, and STC plus state FiT in the financial model.

The 2026 Australia solar design comparison

1. SurgePV, the 2026 Australia winner

Best for: CEC-accredited installers shipping 5 or more residential or C&I deals per month. EPCs that want to consolidate Aurora plus PVsyst plus a separate proposal tool into one cloud workflow.

Strengths.

• AS/NZS 5033, 4777.2, and 3000 are first-class code rule libraries. String sizing, OCPD, isolation, signage, and inverter grid-connection flags trigger inline.
• STC auto-calc by postcode zone and deeming year. The Clean Energy Regulator-aligned multiplier drops straight into the proposal.
• State FiT plus ToU modelling for NSW, VIC, QLD, SA, WA, ACT. Demand tariffs covered for C&I.
• 8,760-hour module-level shading on every plan. Same bankability standard PVsyst uses for project finance.
• AI 3D roof from satellite in under 60 seconds with ±3% accuracy versus LIDAR. No drone for the design phase.
• 70,000-module and 12,000-inverter database with AU-typical brands (Sungrow, Fronius, SMA, GoodWe, SolarEdge, Tesla Powerwall, BYD, JinkoSolar, LONGi, Trina, Q CELLS) pre-loaded.
• White-label proposals with CEC compliance language baked into the customer-facing PDF.

Weaknesses.

• Brand younger than Aurora and PVsyst. Some enterprise procurement teams ask for references first.
• DNSP-specific connection paperwork (Western Power, Ausgrid, Energex, SAPN) is exported, not submitted, from the platform.

SurgePV vs the field. SurgePV ships AS/NZS depth Aurora does not have, native STC the international tools do not have, and bankable simulation OpenSolar charges extra for. Flat $1,299 per user per year at the 5-seat tier. See SurgePV pricing for the full breakdown.

2. OpenSolar

Best for: Australian sole traders and sub-5/month residential installers who want a free core and accept shallower shading.

Strengths. Free at the core, well-established Australian customer base, STC and FiT modelling built in, reasonable proposal layout.

Weaknesses. Shading is shallow at the lower tiers. The annual-irradiance approach (still used by some templates) misses the half-hourly performance reality that customers ask about more than they used to. Per-deal add-ons stack as you scale.

SurgePV vs OpenSolar. OpenSolar is the right tool for the sole trader doing 2 deals a month. Past 5 deals a month, SurgePV's flat seat price overtakes the per-deal economics, and you get module-level 8,760-hour shading instead of an annual-irradiance approximation.

3. Aurora Solar

Best for: AU-based teams with a US-headquartered parent who already have Aurora globally and want consistency.

Strengths. Polished UI, LIDAR option for residential, strong sales-side proposal layout.

Weaknesses. US-first product. AS/NZS standards are not a first-class code library. STC, state FiT, and ToU are not native to the financial model. Premium tier sits at $259 per user per month, roughly AUD 4,800 per seat per year. Sales-facing tools designed for US ITC narratives, not the STC story.

SurgePV vs Aurora. For AU-only installers, SurgePV ships AS/NZS code coverage, STC, and state FiTs Aurora does not have, at one-third Aurora Premium's per-seat cost. For installers who also operate in the US, SurgePV covers NEC, IEC, AS/NZS, and IS code in one license.

4. HelioScope

Best for: Australian C&I and utility-scale engineering teams that need lender-grade yield modelling and have a separate proposal stack.

Strengths. Cloud-native 8,760-hour engine. Strong single-line diagram export. Solid module library.

Weaknesses. $99 to over $300 per user per month depending on tier. No proposals, no STC, no state FiT. AS/NZS code flags rely on the IEC base layer rather than native AU rules. Bankable 8,760-hour shading typically sits behind the Pro tier.

SurgePV vs HelioScope. The same 8,760-hour simulation HelioScope does plus the proposal, plus the STC, plus AS/NZS flags, plus the state FiT model, in one license. Try the solar shading analysis software in the browser.

5. Pylon

Best for: Sales-first residential teams that want a modern proposal UX and have an engineering tool already.

Strengths. Clean UX. Reasonable proposal flow. Fast onboarding.

Weaknesses. Sales-quoted pricing, opaque to evaluate before a call. No bankable simulation. AS/NZS code coverage is thin. STC and FiT modelling exists but is shallow on the engineering side.

SurgePV vs Pylon. SurgePV gives you the same sales-side proposal polish plus the AS/NZS engineering depth and bankable simulation Pylon does not have. Transparent flat seat pricing rather than sales-quoted.

Australian solar context in 2026

According to IEA Renewables 2024, Australia remains one of the highest per-capita solar adopters in the world with over 4 million rooftop systems installed. IRENA reports cumulative solar capacity above 35 GW. The Clean Energy Regulator runs the STC scheme, with deeming period stepping down annually until 2030.

What this means for software choice: rooftop volume is high, STC value is falling steadily, FiT export rates in most states are dropping, and time-of-use plus battery attach-rates are rising. A platform that auto-calculates the STC, models the ToU export side accurately, and includes battery sizing in the same workflow is now the difference between closing a deal and losing it on price.

How SurgePV handles a typical Australian residential job

A 6.6 kW CEC residential job in Sydney's Inner West with a 5 kW inverter and a tile roof. Customer wants STC discount transparent, NSW FiT modelled honestly, and a battery option on the same proposal. Here is the workflow inside SurgePV.

1. Address in, satellite roof out. AI 3D roof in under 60 seconds with tilt, azimuth, and obstructions captured.
2. Module + inverter selection. Pick from the 70,000-module and 12,000-inverter library. Defaults to AU-typical brands.
3. Auto-layout with AS/NZS 5033 setbacks. Edge setbacks, anti-islanding, signage flags, structural mounting checks.
4. AS/NZS 4777.2 grid-connection flags. Inverter compliance verified against the rule set.
5. 8,760-hour module-level shading with chimney and aircon unit modelled from the AI 3D pass.
6. String sizing. MPPT-bounded auto-sizing against the inverter you picked.
7. STC and FiT modelling. STC quantity by Sydney zone 3 and deeming year. NSW retailer FiT plus ToU comparison.
8. Battery sizing option. Powerwall or BYD modelled in the same proposal.
9. Branded PDF or interactive proposal. STC discount on the headline price, payback in AUD, lifetime kWh.

Designer goes from address to a branded customer-ready proposal in roughly 20 minutes. The legacy Aurora plus a separate proposal tool workflow often takes 60 to 90 minutes per deal. Compounded across 30 deals a month that is real designer-hours back.

You can book a free SurgePV demo and design one of your real CEC projects on the call.

DNSP connection: what each state expects

Every DNSP requires a pre-approval and a post-install commissioning notification. The data each one wants is broadly similar, only the portal changes.

• Ausgrid (NSW Sydney + Hunter), Endeavour (NSW West Sydney), Essential (regional NSW). Pre-approval for systems above a phase-current threshold, embedded generation form post-install.
• Energex + Ergon (QLD). Pre-approval and Form A / Form B sequence. Increasingly strict on AS/NZS 4777.2 compliance.
• SA Power Networks. Strict export limit controls. Flexible Export Limits framework on newer installs.
• Powercor + AusNet + United (VIC). Pre-approval and SVF (smart inverter) compliance.
• Western Power (WA SWIS), Horizon (WA regional). Different connection rules for each.

SurgePV ships system size, inverter type, AS/NZS 4777.2 compliance flags, half-hourly export profile, and the point-of-connection one-line straight out of the design pack. You still submit through the DNSP portal, but the data extraction is automatic.

Pricing comparison for Australian installers

Where QuickEstimate fits

QuickEstimate is built for the Indian solar market with PM Surya Ghar subsidy automation, DISCOM net metering, and WhatsApp-first sales workflows. For Australian installers the natural pairing is SurgePV plus your existing CRM (HubSpot, Salesforce, Pipedrive, or an AU-specific solar CRM). SurgePV exposes a clean API and Zapier integration so the design output flows into whichever CRM your sales team already lives in. If you also operate across India, see how the QuickEstimate solar CRM handles the Indian side, and the QuickEstimate guide to the best solar CRM software in India.

Implementation: a 5-day rollout

1. Day 1. SurgePV account live, first user trained on AI 3D roof and 8,760-hour shading.
2. Day 2. CEC-aligned proposal template branded with your logo, CEC accreditation number, and state FiT defaults.
3. Day 3. First three real projects designed in SurgePV alongside your existing tool. Compare yield and pack output.
4. Day 5. Whole team onboarded, AS/NZS rule sets checked against your in-house QA list.
5. Week 2. Cancel the legacy tool. Typical AU installer reports payback inside 30 days at 5+ deals per month.

Frequently asked questions

What is the best solar design software in Australia for 2026?

SurgePV. AS/NZS 5033 + 4777.2 + 3000 coverage, native STC auto-calc by postcode zone and deeming year, state FiT and ToU modelling, AI 3D roof from satellite, 8,760-hour bankable simulation, and white-label proposals from $1,299 per user per year at the 5-seat tier.

Does SurgePV calculate the STC rebate?

Yes. STC quantity is calculated by system size, postcode zone (1 to 4), and current deeming year, then dropped straight into the customer-facing proposal as a headline discount.

Will SurgePV cover AS/NZS 4777.2 inverter compliance?

Yes. Inverter selection is checked against the 4777.2 rule set, including anti-islanding, voltage and frequency response, and power quality flags. Compliance issues are surfaced on the design pack.

Does Aurora Solar handle Australian-specific tariffs?

Aurora is US-first. STC, state feed-in tariffs, and ToU modelling are not native to the financial model. Australian installers using Aurora typically run a second proposal tool for the customer-facing rebate maths.

Can SurgePV size batteries on the same proposal?

Yes. Powerwall, BYD, Sungrow, GoodWe storage, and other major AU brands are in the 12,000-inverter and storage database. Battery sizing runs in the same proposal as the PV array.

Is there a free trial?

Yes. Free trial with no credit card required. Design one of your real CEC residential or C&I projects on the trial.

How does SurgePV pricing compare to OpenSolar for an AU team?

OpenSolar's free core works well for sole traders. Once a team ships more than 5 deals a month per designer, the per-deal add-on stack typically overtakes SurgePV's flat $1,299 per user per year, and you get module-level 8,760-hour shading rather than annual-irradiance approximations.

Does SurgePV model NSW, VIC, QLD, SA, and WA feed-in tariffs?

Yes. State retailer FiT tables are maintained and updated, with ToU profiles for retailers that offer different daytime, evening, and overnight rates. Demand tariffs are covered for C&I.