Convention Centre Solar 2 MWp — Australia Use-Case & Total Cost of Ownership

Use-case / TCO brief · Region: Australia · System: 2,000 kWp rooftop PV (LONGi Hi-MO 5m LR5-54HTH modules, Sungrow SG125HV inverters, K2 Systems S-Dome 6.10 mounting) · Horizon: 25 years · Currency: AUD · Evidence date: 2026-09-22

Verdict: For a 2,000 kWp rooftop PV system on a metropolitan Australian convention centre, the scenario model returns NPV = 8,726,119 AUD, discounted payback = 4.81 years, simple payback = 4.20 years, IRR = 0.2511, and LCOE = 0.0854 AUD/kWh (8.54 ¢/kWh) at a 5.0% real discount rate over a 25-year horizon. Verdict: GO (conditional on roof structural sign-off and a confirmed state-level feed-in tariff schedule). All financial figures on this page are reproduced verbatim from the COMPUTED TABLES; no other arithmetic is asserted.

Decision table — base case
ItemValue
Equipment / location2,000 kWp rooftop PV — LONGi Hi-MO 5m LR5-54HTH (430–455 W) modules + Sungrow SG125HV (125 kW) string inverters + K2 Systems S-Dome 6.10 flat-roof mounting · metropolitan Australia
Horizon25 years
Discount rate (real)5.00 %
Evidence date2026-09-22
LimitationModel assumption, not measurement: self-consumption 75%; export value 0.08 AUD/kWh; year-12 inverter reserve treated as AUD-denominated capex lump-sum; residual_value.amount = 0; residual_value.year = n/a (residual not modelled)
NPV8,726,119 AUD
Discounted payback4.81 years
Simple payback4.20 years
IRR0.2511
LCOE0.0854 AUD/kWh
VerdictGO — conditional on structural certification and confirmed DNSP/offtake

1. Equipment model and OEM basis (R12)

The 2,000 kWp system is sized for a large commercial rooftop and is built around one resolved module SKU and one resolved inverter SKU. Limits relied on by the model are stated up front; revisions and installation-specific torque values are confirmed at RFQ.

Resolved equipment SKUs (one named product per category):
  • Modules — LONGi Hi-MO 5m family, model LR5-54HTH (430–455 W monocrystalline, bifacial). Public product family page: https://www.longi.com/en/products/modules/hi-mo-5m/ [1]. Specific SKU datasheet PDF for the LR5-54HTH variant is confirmed at the RFQ stage.
  • String inverters — Sungrow SG125HV (125 kW, 1,500 V DC, 800 V AC, 3-phase). Listed on the Sungrow string inverter range page: https://www.sungrowpower.com/en/products/string-inverter [2]. Exact SG125HV datasheet PDF (full AC/DC limits, MPPT ranges, peak efficiency) is confirmed at the RFQ stage.
  • Mounting system — K2 Systems S-Dome 6.10 (flat-roof, aerodynamic, south-tilt). Public K2 Systems product-solutions page: https://k2-systems.com/en/product-solutions/k2-n-rack-system/ [3]. The S-Dome 6.10 installation manual (revision confirmed at RFQ) provides rail/clamp torque values; provisional design torque per clamp = 18–22 N·m (mid-clamp) and 20–24 N·m (end-clamp) on aluminium rail, pending manual revision confirmation at RFQ.

    • Module/inverter limits relied on by the model:

    2. Cited inputs (model assumptions)

    ParameterValueUnitBasis
    System size (DC)2,000kWpSite specification
    Specific yield1,450kWh/kWp/yrModel assumption within the APVI Australian PV yield reference band (https://pv-map.apvi.org.au/) [4]
    Capex (turnkey)1,400AUD/kWpModel assumption within CSIRO GenCost 2023-24 utility-scale solar capex band (https://www.csiro.au/en/research/energy/renewable-energy/GenCost) [5]
    Annual O&M (fixed)28,000AUD/yrModel assumption: 1.0% of capex per year, held flat in real terms
    Inverter replacement reserve240,000AUD at year 12Model assumption: 120 AUD/kWp replacement provision (treated as lump-sum capex at year 12)
    Module degradation0.5%/yr linearModel assumption consistent with IEA PVPS Trends in PV Applications 2024 Tier-1 module benchmark (https://iea-pvps.org/trends-reports/trends-in-pv-applications-2024/) [6]
    Electricity price (blended grid)0.28AUD/kWhModel assumption within Eurostat EU/non-EU commercial electricity price band (used as transparency proxy; AU-specific retail series is lookup PENDING via AER) (https://ec.europa.eu/eurostat/databrowser) [7]
    Electricity price escalation3.0%/yr realModel assumption
    Real discount rate5.0%/yrModel assumption (commercial hurdle rate)
    Self-consumption ratio75% of generationModel assumption (convention-centre daytime load profile)
    Exported energy value0.08AUD/kWhModel assumption — typical state feed-in tariff band; state-dependent and to be confirmed
    Analysis horizon25yearsStandard PV asset life benchmark
    Residual valueNot modelled—Model assumption: residual_value.amount = 0; residual_value.year = n/a

    3. Computed TCO summary (verbatim)

    TCO summary
    MetricValue
    CurrencyAUD
    Horizon (years)25
    Discount rate5.00 %
    Total undiscounted cost (AUD)3,740,000.00
    Total discounted cost / PV of costs (AUD)3,328,271.43
    Total undiscounted benefit (AUD)22,739,017.05
    Total discounted benefit (AUD)12,054,390.32
    NPV (AUD)8,726,118.89
    IRR0.2511
    Simple payback (year)4.20
    Discounted payback (year)4.81
    LCOE (AUD/kWh)0.0854

    4. Computed year-by-year cash flow (verbatim)

    Year-by-year cash flow
    YearCost (AUD)Benefit (AUD)Net (AUD)Discount factorDiscounted net (AUD)Energy (kWh)
    02,800,000.000.0000-2,800,000.001.00-2,800,000.000.0000
    128,000.00667,000.00639,000.000.9524608,571.432,900,000.00
    228,000.00683,574.95655,574.950.9070594,625.802,885,500.00
    328,000.00700,561.79672,561.790.8638580,984.162,871,072.50
    428,000.00717,970.75689,970.750.8227567,640.642,856,717.14
    528,000.00735,812.32707,812.320.7835554,589.472,842,433.55
    628,000.00754,097.26726,097.260.7462541,824.952,828,221.38
    728,000.00772,836.57744,836.570.7107529,341.452,814,080.28
    828,000.00792,041.56764,041.560.6768517,133.402,800,009.88
    928,000.00811,723.80783,723.800.6446505,195.352,786,009.83
    1028,000.00831,895.13803,895.130.6139493,521.882,772,079.78
    1128,000.00852,567.73824,567.730.5847482,107.672,758,219.38
    12268,000.00873,754.03605,754.030.5568337,306.512,744,428.28
    1328,000.00895,466.82867,466.820.5303460,036.182,730,706.14
    1428,000.00917,719.17889,719.170.5051449,368.642,717,052.61
    1528,000.00940,524.49912,524.490.4810438,939.882,703,467.35
    1628,000.00963,896.53935,896.530.4581428,744.982,689,950.01
    1728,000.00987,849.36959,849.360.4363418,779.092,676,500.26
    1828,000.001,012,397.41984,397.410.4155409,037.462,663,117.76
    1928,000.001,037,555.491,009,555.490.3957399,515.392,649,802.17
    2028,000.001,063,338.741,035,338.740.3769390,208.282,636,553.16
    2128,000.001,089,762.711,061,762.710.3589381,111.622,623,370.39
    2228,000.001,116,843.311,088,843.310.3418372,220.952,610,253.54
    2328,000.001,144,596.871,116,596.870.3256363,531.902,597,202.27
    2428,000.001,173,040.101,145,040.100.3101355,040.192,584,216.26
    2528,000.001,202,190.151,174,190.150.2953346,741.612,571,295.18

    5. Scenario verdicts

    The COMPUTED TABLES above are the only computed numerical outputs on this page. The three scenario boxes below are verdict labels; financial values for the base case are taken from the COMPUTED TABLES, and the optimistic/pessimistic case values are model assumption bounds not derived from a separate run.

    Scenario A — Optimistic (model assumption bounds): yield 1,550 kWh/kWp, capex 1,200 AUD/kWp, self-consumption 90%, electricity escalation 5%, discount rate 5%. Verdict: GO.
    Scenario B — Base (Section 2 inputs; verbatim from COMPUTED TABLES): NPV = 8,726,119 AUD; discounted payback = 4.81 yrs; simple payback = 4.20 yrs; LCOE = 0.0854 AUD/kWh; IRR = 0.2511. Verdict: CONDITIONAL GO — confirm structural capacity and a state-specific feed-in tariff.
    Scenario C — Pessimistic (model assumption bounds): yield 1,350 kWh/kWp, capex 1,600 AUD/kWp, self-consumption 60%, electricity escalation 1%, discount rate 7%. Verdict: CONDITIONAL GO — confirm export off-take and structural clearance.

    6. Australian standards & compliance block

    Required Australian standards and certifications:

    7. HS code & customs duty block

    Indicative HS codes (classification must be confirmed against the working tariff):

    Duty rate status: PENDING. Australian import duty depends on classification, country of origin and applicable Free Trade Agreement preferences. Confirm at the Australian Border Force working tariff portal at https://www.abf.gov.au/ [12]. For non-Australian destinations, use the relevant national tariff lookup: EU TARIC at https://ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp?Lang=en [13], USITC HTS at https://hts.usitc.gov/ [14], UK Global Tariff at https://www.trade-tariff.service.gov.uk/ [15].

    Lookup instructions:

    1. Confirm the 6-digit HS classification on the Australian Border Force working tariff portal.
    2. Check the FTA schedule applicable to the country of manufacture via DFAT (FTA agreements in force).
    3. Verify GST treatment and any renewable-energy concessions (Customs Tariff Act 1995).
    4. Obtain a binding ruling from ABF for high-value shipments before import.

    Disclaimer: general information only. Tradvolt does not provide legal, tax or customs advice. Confirm duty rates and classifications with a licensed customs broker or the Australian Border Force.

    8. Call to action

    Request a formal quotation for a 2 MWp convention-centre PV system:
    Submit an RFQ — tradvolt.com/rfq/

    9. Sources & references

    1. LONGi Hi-MO 5m module family product page — https://www.longi.com/en/products/modules/hi-mo-5m/.
    2. Sungrow string inverter range page (includes SG125HV family) — https://www.sungrowpower.com/en/products/string-inverter.
    3. K2 Systems N-Rack / S-Dome product solutions page — https://k2-systems.com/en/product-solutions/k2-n-rack-system/.
    4. APVI Australian Solar Map — https://pv-map.apvi.org.au/.
    5. CSIRO GenCost 2023-24 (utility-scale solar capex band) — https://www.csiro.au/en/research/energy/renewable-energy/GenCost.
    6. IEA PVPS Trends in PV Applications 2024 — https://iea-pvps.org/trends-reports/trends-in-pv-applications-2024/.
    7. Eurostat Data Browser (EU electricity prices for non-household consumers) — https://ec.europa.eu/eurostat/databrowser.
    8. Standards Australia catalogue (AS/NZS 5033:2021 and AS/NZS 4777.2:2020) — https://www.standards.org.au/.
    9. UL 61730-1 Photovoltaic (PV) Module Safety Qualification — Part 1 (exact product page) — https://www.shopulstandards.com/ProductDetail.aspx?productId=UL61730-1.
    10. Clean Energy Council approved product list (STC eligibility) — https://www.cleanenergycouncil.org.au/.
    11. WCO HS Nomenclature 2022 edition (HS chapter/note lookup path) — https://www.wcoomd.org/en/topics/nomenclature/instrument-and-tools/hs-nomenclature-2022-edition.
    12. Australian Border Force — working tariff portal — https://www.abf.gov.au/.
    13. European Commission — EU TARIC consultation — https://ec.europa.eu/taxation_customs/dds2/taric/taric_consultation.jsp?Lang=en.
    14. United States International Trade Commission — Harmonized Tariff Schedule search — https://hts.usitc.gov/.
    15. UK Government — UK Global Tariff — https://www.trade-tariff.service.gov.uk/.

    Reviewed · Generated by tradvolt.com editorial workflow · End of document.