Tools · Commercial & Utility-Scale

Size your NZ Solar + BESS project in 90 seconds.

An indicative budget and equipment range for commercial, industrial, and utility-scale projects in New Zealand — calibrated to TPC's EPC delivery, AS/NZS 4777.2 inverter rules, and current NZ market benchmarks. Indicative only · not a binding quote.

New Zealand only For projects outside NZ, please request a quote directly.
Step 1 of 3 · Tell us about the project
Drives the equipment architecture and cost benchmark.
10.0 MW
Inverter export limit at the point of connection. Min 50 kW · max 100 MW for this calculator.
1.20×
Typical NZ utility: 1.20–1.30. Higher boosts winter yield but clips summer peaks.
Headline panel — final selection driven by site, mounting, and AS/NZS 4777.2 compliance.
2.0 hr
BESS energy ÷ AC power. 0 = no storage. NZ peakers typically 2–4 hr.
Region sets irradiance, capacity factor, and grid network area.
4-digit NZ postcode. Used to confirm the project site is in New Zealand. Please enter a valid 4-digit NZ postcode.
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Step 2 of 3 · Send to a TPC engineer

Where should we send your range?

A TPC engineer (not a sales rep) will email a copy of this indicative range plus a follow-up call within one business day.

Required.
Please enter your company or organisation name (minimum 3 letters).
Please use your work / company email. Free email accounts (gmail, yahoo, hotmail, outlook etc.) are not accepted. Please enter a valid work email.
Optional. International format (e.g. +64 21 …). Used only if email bounces. Please enter a valid phone number, or leave blank.
Collection notice — Privacy Act 2020 (NZ). We are Hadid Group (NZ Office: 24 Waihou Crescent, Albany 0632, Auckland). We collect the information above to (a) prepare and send you an indicative project range, and (b) follow up on your enquiry. We will not on-sell or rent your details. Your information is held in our CRM (hosted in Australia/New Zealand and the United States) and retained for 24 months from your last contact unless you ask us to delete it sooner. You can request access or correction of your information at any time by emailing privacy@tpcsolars.com. Our full Privacy Policy explains your rights, including how to complain to the Office of the Privacy Commissioner.

Protected by spam honeypot + rate-limit. No data is sent to third-party advertising networks.

Step 3 of 3 · Range unlocked
✓

We've sent your indicative range.

A TPC engineer will email shortly with this range, plus a short call to walk through what would change in a binding proposal — site survey, network connection, ground conditions, and AS/NZS 4777.2 inverter selection.

Request a binding quote See NZ case studies
How we calculate

Transparent assumptions, NZ-calibrated.

NZ irradiance & yield

Capacity factor 14–22 % depending on region (Northland highest, Southland lowest). Yield range: 1,100–1,450 kWh/kWp/year. Sources: NIWA SolarView, MBIE Energy Outlook, EECA business cases, plus TPC site data from Auckland, Hawke's Bay, and Central Otago installs.

Capex bands (NZD, ex GST)

C&I rooftop: NZ$1.65–2.40/W. Ground-mount 1–10 MW: NZ$1.45–1.95/W. Utility 10 MW+: NZ$1.15–1.55/W. BESS: NZ$480–720/kWh installed (PCS, container, fire suppression, install). Bands cover lines-company connection costs from low-strain to high-strain feeder upgrades.

Equipment sizing

Module count = DC (kWp) ÷ module Wp. Inverters sized at 350 kW per string unit (Sungrow SG350HX equivalent, AS/NZS 4777.2-listed). MVPS skids at 4 inverters each. BESS containers at ~5 MWh per 20-ft unit (LFP, liquid-cooled, NFPA 855 / UL 9540A compliant).

Legal & compliance · NZ

What this calculator is — and isn't.

Indicative only · Fair Trading Act 1986

Outputs are budgetary estimates derived from public NZ benchmarks. They are not an offer, quote, contract, or representation under the Fair Trading Act. Final pricing depends on full site survey, geotechnical conditions, distribution-network operator (DNO) approvals, and final equipment selection.

Privacy Act 2020 · IPP 1–5

We collect only what we need to respond to your enquiry (Information Privacy Principles 1–5). Your data is stored in NZ/AU and US (CRM provider), retained for 24 months from last contact, never on-sold. Access and correction rights at any time. Full Privacy Policy →

Consumer Guarantees Act 1993

Where Consumer Guarantees Act applies (residential or small business under $500k p.a.), TPC's binding quotes carry CGA guarantees of fitness-for-purpose, reasonable skill and care, and acceptable quality. This calculator's outputs are pre-contract estimates and not subject to CGA.

AS/NZS 4777.2 & Electricity Safety

Any inverter we eventually specify will be on the EESS-approved list under AS/NZS 4777.2:2020. High-voltage works will comply with the Electricity (Safety) Regulations 2010 and AS/NZS 3000. BESS will comply with NFPA 855, UL 9540A, and FENZ (Fire and Emergency NZ) acceptance criteria.

Resource consents & RMA 1991

Utility-scale projects (typically > 1 MW or > 1 ha) often require resource consent under the Resource Management Act 1991, with fast-track pathways available for projects of national significance. The calculator does not size consenting cost or timeline. We can scope this in a follow-up.

GST & cross-border supply

All NZD figures exclude GST (15 %). Equipment is supplied CIF Auckland or DDP-site under TPC's standard incoterms; GST and import duty (where applicable) are added at landing per the Goods and Services Tax Act 1985.

Anti-spam · UEMA 2007

If you opt in to market updates, we comply with the Unsolicited Electronic Messages Act 2007. Every email carries a one-click unsubscribe and identifies Hadid Group as sender. We do not buy, rent, or scrape email lists.

Export controls

This calculator is region-locked to projects in New Zealand. For projects in Australia, the Pacific, MENA, Europe, North America, or Asia, please use our multi-region savings calculator or request a quote directly.

Hadid Group · NZBN forthcoming · NZ Office: 24 Waihou Crescent, Albany 0632, Auckland · Global HQ: Nanjing, China. Last updated 2026-04-30. Methodology version 1.1 — calibrated against TPC's NZ utility-scale delivery experience and current Tier-1 NZ EPC market benchmarks. v1.1 hardened lead-gate validation (work-email enforcement, company sanity, phone format, attribution capture).