Greenhouse Solar 600 kWp AU — 25-Year TCO and Verdict

Verdict (first)

Proceed. For a 600 kWp rooftop PV system on a Venlo glasshouse in the Murray–Darling food-bowl, Australia, over a 25-year horizon at a nominal 8.00 % per year discount rate, the scenario TCO model returns an NPV of AUD 1,403,397, an IRR of 19.34 %, a simple payback of 5.29 years, a discounted payback of 7.08 years, and an LCOE of AUD 0.1530/kWh. Evidence date: 2026-09-22. Limitation: equipment named by specific publicly marketed models; the named module, inverter and rail/kit revisions and any torque / voltage / SOC limits must be re-verified to the OEM manual revision at RFQ. Australian import duty rates on HS 8541.43, 8504.40 and 7326.90 are PENDING and must be confirmed against the current ABF working tariff pages before shipment.

TCO summary (computed)

Year-by-year cash flow (computed)

Year-10 and Year-20 cost spikes reflect the inverter replacement event inside the model; the 25-year table above is the single source of truth.

Bounded model assumptions (explicit)

Equipment (named, publicly marketed models)

The model is parameterised on specific, real, publicly marketed products. Clamping-torque, MPPT voltage window, DC/AC ratios and SOC limits for the inverter must be re-verified to the OEM manual revision at RFQ.

Modules

• LONGi Hi-MO 5m — LR5-72HBD / LR5-54HTH bifacial mono-PERC, 540–560 Wp class (1500 V DC). Product page: https://www.longi.com/en/products/modules/hi-mo-5m/. Manual revision and torque limits locked at RFQ.

Inverter cluster (~600 kWac, 1500 V DC)

• Huawei SUN2000-330KTL-H1 — 330 kW, 3-phase, 1500 V DC, 8-MPPT string inverter (2 units → ~600 kWac). Product page: https://solar.huawei.com/en/products/sun2000-330ktl-h1. Manual revision and any voltage/SOC limits locked at RFQ.
• Sungrow SG125HT (C&I 3-phase 1500 V DC string inverter) within the Sungrow string-inverter range. Product page: https://www.sungrowpower.com/en/products/string-inverter. Exact SKU and manual revision confirmed at RFQ.

Mounting

• K2 Systems N-Rack ground/roof rail system + S-Rack module clamp set, scaled to 12° tilt on Venlo glasshouse purlins at 1.5 m spacing. Product page: https://k2-systems.com/en/product-solutions/k2-n-rack-system/. Kit model, material grade and clamping-torque revision confirmed at RFQ.

Standards reference only (no certificate held by TradVolt)

The references below are standards/codes the buyer should verify against the chosen SKU at RFQ. TradVolt holds no certificate and no implied endorsement is made.

• AS/NZS 5033:2021 — Photovoltaic arrays — Standards Australia. Reference only; no certificate held by TradVolt.
• AS/NZS 4777.1:2016 — Grid connection of energy systems via inverters, Part 1 — Standards Australia. Reference only; no certificate held by TradVolt.
• AS/NZS 3000:2018 — Electrical installations (Wiring Rules) — Standards Australia. Reference only; no certificate held by TradVolt.
• UL 61730-1 — Photovoltaic (PV) Module Safety Qualification — Part 1 — UL. Document page: https://www.shopulstandards.com/ProductDetail.aspx?productId=UL61730-1. Reference only; no certificate held by TradVolt.
• IEC 61851-1:2017 — Electric vehicle conductive charging system — Part 1 — IEC Webstore (catalogue page: https://webstore.iec.ch/en/publication/33644) and IEC 61851-23:2014/AMD1:2023 (catalogue query: https://webstore.iec.ch/en/products/?q=61851-23) and IEC 62196-3 (catalogue query: https://webstore.iec.ch/en/products/?q=62196-3) — for any EV-charge-point scope. Reference only; no certificate held by TradVolt.
• UN Manual of Tests and Criteria (UN 38.3 lithium battery provisions; ST/SG/AC.10/11/Rev.7) — https://unece.org/transport/dangerous-goods/un-manual-tests-and-criteria. Reference only; relevant only if a battery is added to the scope.
• UL 1973 — Batteries for Use in Stationary and Motive Auxiliary Power Applications — https://www.shopulstandards.com/ProductDetail.aspx?productid=UL1973. Reference only; no certificate held by TradVolt.
• ISO 2859 (sampling procedures for inspection by attributes) — https://www.iso.org/search.html?q=2859. Reference only.
• Regulation (EU) 2023/1542 — EU Battery Regulation — https://eur-lex.europa.eu/eli/reg/2023/1542/oj. Reference only; relevant only if a battery is added to the scope and the system enters the EU.

This system sits outside the small-scale renewable certificate cap (>100 kW, so no STCs are created). The site does not dispatch into the NEM, so no LGCs are created. Australian standards are accessed via the Standards Australia catalogue.

HS classifications and duty rates (PENDING)

HS codes are stated as the consultation reference for the buyer; all Australian duty/GST rates are PENDING and must be confirmed against the current ABF working tariff pages immediately before shipment.

• 8541.43 — Photovoltaic cells, whether or not assembled in modules or made up into panels (modules). Duty: PENDING (ABF lookup).
• 8504.40 — Static converters (inverter cluster). Duty: PENDING (ABF lookup).
• 7326.90 — Other articles of iron or steel (mounting rails and clamps). Duty: PENDING (ABF lookup).

Lookup paths: Australian Border Force — https://www.abf.gov.au/ (deep classification pages moved 2024–25; consult the latest working tariff page on the ABF domain before shipment); EU TARIC — https://ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp?Lang=en; USITC HTS — https://hts.usitc.gov/; UK Global Tariff — https://www.trade-tariff.service.gov.uk/; WCO HS Nomenclature 2022 edition — https://www.wcoomd.org/en/topics/nomenclature/instrument-and-tools/hs-nomenclature-2022-edition.

Procurement anchor

Buyers can request a structured, line-item RFQ for a 600 kWp greenhouse-roof solar system with this exact input envelope via the TradVolt workspace form:

/rfq/

Sources and references