New Zealand sits next door to Australia and runs an almost opposite software problem. Australian residential solar is organised around certificate creation and a compliance trail attached to every job. New Zealand has no equivalent national scheme at all. Take that one difference seriously and half the stack an Australian installer pays for stops being necessary here.
Direct answer. Solar software in New Zealand splits into six layers: design and simulation, sales and proposal, compliance documentation, monitoring, CRM and operations, and procurement. The New Zealand distinctive is that the compliance layer is nearly empty. With no national subsidy or certificate scheme, there is no paperwork product to buy, so spend concentrates in design and proposal instead.
TL;DR
- No national subsidy or certificate scheme, so the compliance software layer barely exists.
- What remains is AS/NZS 5033 design, sign-off by a registered electrical worker, and a lines company connection application.
- Low buy-back rates make self-consumption the value driver, so proposals must model load against a generation profile.
- Mountainous terrain means far-horizon shading is a real design input, not a rounding error.
- Total stack cost runs from roughly NZ$1,000 to NZ$25,000 a year depending on stage.
What “Solar Software” Actually Means in New Zealand
Six distinct jobs sit under the phrase. The New Zealand balance between them is unusually lopsided.
Design and simulation. Layout, string sizing, shading, and yield, under AS/NZS 5033 for array design.
Sales and proposal. Customer-facing savings documents. In New Zealand this means self-consumption modelling, not an annual kWh headline.
Compliance documentation. Electrical certification and the lines company connection application. This is the layer that is almost empty here.
Monitoring. Post-commissioning production, usually the inverter vendor’s portal.
CRM and operations. Lead handling, site visits, and installer scheduling.
Procurement. Distributor sourcing, with a small domestic market and long supply lines.
The New Zealand Solar Software Stack, Layer by Layer
| Layer | Representative tools | Who uses it | Typical cost per year |
|---|---|---|---|
| Design and simulation | PVsyst, OpenSolar, SurgePV, HelioScope | Designers | NZ$0 to NZ$5,500 per seat |
| Sales and proposal | OpenSolar, SurgePV, in-house templates | Sales team | NZ$0 to NZ$5,500 per seat |
| Compliance documentation | Lines company web forms, standard certificates | Electrical lead | Effectively nil |
| Monitoring | Inverter vendor portals | O&M | Usually bundled with hardware |
| CRM and operations | HubSpot, Pipedrive, spreadsheets | Everyone | NZ$0 to NZ$3,000 per seat |
| Procurement | Distributor portals | Purchasing | Usually free |
Look at the third row. In the Australian and UK versions of this table, that row carries real money and a named category of product. Here it carries a web form. That single row is the whole story of New Zealand solar software.
The Layer That Barely Exists in New Zealand
New Zealand has no national solar subsidy and no certificate scheme comparable to Australian STCs or the UK’s MCS.
That absence removes an entire category of software. There is no certificate value to calculate at the point of sale, no deemed generation figure embedded in the quoted price, and no accreditation body prescribing how a performance estimate must be produced. Nobody is selling you a compliance platform because there is no compliance product to sell.
What does exist is smaller and more conventional. Installations are designed and installed to AS/NZS 5033. The electrical work is signed off by a registered electrical worker under the Electrical Workers Registration Board, which is a licensing and certification obligation on a person, not a modelling task for a tool. Then there is a connection application to the local lines company, and the format of that application varies by region because the lines companies are separate businesses with their own processes.
That regional variation is the one genuine administrative annoyance. It is a handful of forms and a contact list, though, not a subscription. A competent office administrator handles it.
The consequence for a buyer is direct. A New Zealand installer needs fewer layers than almost any market covered in this series, and total software spend is correspondingly low. Money that an Australian competitor spends on certificate administration is simply not spent here. My opinionated view is that this is a trap dressed as a saving. Because the paperwork layer costs nothing, New Zealand operators tend to under-invest in the two layers that actually decide whether a quote closes, which are honest self-consumption modelling and real terrain shading.
Try the software behind this guide
Model self-consumption, not an annual kWh total
SurgePV runs 8,760-hour design with far-horizon terrain shading and a north-facing southern hemisphere sun path, so the savings you quote match the hours the household is actually home, then exports the single-line diagram and DWG.
Book a free SurgePV demo →No credit card. 20-minute walkthrough on one of your own projects.
Why Buy-Back Rates Reshape the Proposal Layer
Buy-back rates offered by New Zealand retailers are low relative to the retail import price. A unit consumed in the house is worth considerably more than a unit exported. That is a modelling requirement, not a marketing point.
An annual generation total tells a customer nothing useful in this market. Two households with identical roofs and identical arrays get very different savings depending on when they use power. The proposal has to put a generation profile against a load profile, hour by hour, and report the share that offsets imports.
Battery attach rates follow directly. Once self-consumption is the value driver, storage stops being an upsell and becomes the mechanism that moves generation into the evening peak. Proposal software that cannot model a battery against a real load shape cannot honestly quote the product. Depth on this sits in our solar proposal software in New Zealand guide.
Terrain, Latitude, and the Southern Sun Path
New Zealand is mountainous, and that has a design consequence flat-site tools miss. A far horizon of hills or ranges cuts real generation from the start and end of the day, all year. A tool that models only near objects such as chimneys, vents, and trees will report a yield the site cannot deliver.
Latitude spread matters too. The country runs roughly 35 to 47 degrees south. A design rule of thumb calibrated in Northland is wrong in Southland, both for tilt and for winter output.
Then the basic orientation point. Arrays face north here. Inherited northern hemisphere spreadsheets and templates are a genuine and recurring error source, and the failure is quiet because the numbers still look plausible. The design layer is covered in solar design software in New Zealand, and the shading question specifically in solar shading analysis software in New Zealand.
What Stack You Need at Your Size
Residential installer, under 100 systems a year. Two layers, and one free product can cover both. Design and proposal in a single tool, plus the connection forms your lines company publishes. There is no third layer to buy.
Residential installer, 100 to 400 systems a year. Three layers. Add a real CRM once lead volume exceeds a shared inbox, and take the proposal layer seriously enough to model batteries properly.
Residential plus light commercial. Four layers. Commercial clients read yield studies and ask about loss assumptions, so a proper simulation tool starts earning its licence.
Commercial and utility-scale. Five to six layers with PVsyst as the engine of record.
Compare this with the Australian progression next door. There, the second spend usually goes to operations and certificate throughput. Here the second spend should go to modelling quality, because there is no paperwork treadmill competing for the money.
Pricing the Whole Stack in New Zealand Dollars
Figures below use an illustrative rate of about 1.65 NZD to the US dollar. Most of these platforms price in US dollars, so a seat quoted at USD 1,299 moves with the rate against a budget set in NZD.
| Company stage | Layers | Realistic annual software spend |
|---|---|---|
| Residential under 100 systems | 2 | NZ$0 to NZ$2,500 |
| Residential 100 to 400 systems | 3 | NZ$2,500 to NZ$10,000 |
| Residential plus light commercial | 4 | NZ$10,000 to NZ$25,000 |
| Commercial and utility | 5 plus | NZ$25,000 upward |
Per-platform detail is in our solar design software pricing breakdown.
What Most New Zealand Installers Get Wrong
They quote an annual kWh figure and let the customer assume it is savings.
Here is the concrete failure mechanism. The design tool reports, say, 7,500 kWh a year. The salesperson multiplies that by the retail import rate and puts the result on the proposal as annual savings. But a working household exports a large share of midday generation, and exported units earn the buy-back rate, which is a fraction of the import rate. The quoted saving is therefore inflated by the export share multiplied by the gap between the two rates. The customer discovers this on their first summer bill, and the referral you were counting on does not arrive.
The fix is not a better design engine. It is putting a load profile in front of the generation profile before any number reaches a customer.
The second mistake is running a northern hemisphere template. Somebody copies a spreadsheet or a default site setting, azimuth conventions do not get checked, and the model quietly optimises for a south-facing array. The output still looks like a normal report. Nothing errors. You find out when measured production sits below the estimate and nobody can say why.
When Software Is Not the Answer
If a commercial enquiry needs structural sign-off for a roof, or wind and seismic loading on a mounting system, that is an engineering deliverable rather than a modelling output.
Our solar civil and structural engineering team produces mounting and load designs delivered as STAAD Pro report calculations, with solar rooftop detailed engineering design for the construction pack. See the sample design pack or talk to our team.
Conclusion
- Spend the money the compliance layer did not take. With no certificate scheme, put the budget into modelling quality instead.
- Model self-consumption, never an annual total. Low buy-back rates make timing the whole argument.
- Include the far horizon. In mountainous country, terrain shading is a design input, not a detail.
In this country series: best solar design software in New Zealand, best solar proposal software in New Zealand, shading analysis software in New Zealand, Pvsol review. Tool deep dives: Pvcase review, Pvsyst review.
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Disclosure and accuracy note
Commercial relationship. Heaven Designs and SurgePV are part of the same group. Treat our recommendation of SurgePV as a vendor making its own case, not an independent verdict. We have tried to describe every other product fairly, and to say plainly where a competitor is the better choice.
Pricing. All prices are indicative, compiled from public sources when this page was written. They vary by tier, region, contract term and exchange rate, and change without notice. Several vendors quote rather than publish, and some price in currencies other than the US dollar, so a converted figure moves with the exchange rate. Confirm current pricing with the vendor before you decide anything.
Trademarks and corrections. All product names and trademarks belong to their respective owners, and are used here for identification and comparison only. Their use does not imply affiliation with or endorsement by those companies. If anything here is out of date or wrong, tell us and we will correct it.
FAQ
What is solar software? An umbrella term for six categories: design and simulation, sales and proposal, compliance documentation, monitoring, CRM and operations, and procurement. In New Zealand the compliance category is close to empty, so most businesses need two or three of the rest.
What solar software do New Zealand installers actually use? Residential installers commonly run one tool covering design and proposal, the inverter vendor’s monitoring portal, and a general CRM once volume demands it. Commercial work adds PVsyst or an equivalent simulation platform.
How much does solar software cost in New Zealand? Often very little at small residential volume, rising to roughly NZ$10,000 to NZ$25,000 a year for a business running residential plus light commercial work.
Is there a New Zealand equivalent of STCs or MCS? No. There is no national subsidy or certificate scheme of that kind, which is why the paperwork layer of the stack is nearly empty compared with Australia or the UK.
What compliance does apply to a New Zealand solar install? Design and installation to AS/NZS 5033, electrical sign-off by a registered electrical worker under the Electrical Workers Registration Board, and a connection application to the local lines company. The connection process varies by region.
Do I need a battery model in my proposal software? In practice yes. Low buy-back rates mean value comes from self-consumption, and storage is the main way to shift generation into evening use. Software that cannot model a battery against a household load shape cannot quote the product honestly.
Related: the design layer in depth is in best solar design software in New Zealand, the sales layer in best solar proposal software in New Zealand, and shading specifically in best solar shading analysis software in New Zealand.
