Verdict (Base case, 25-year horizon, 9.00 % WACC, evidence date 2026-01-15): NPV = USD 381,732.48; simple payback = 4.38 years; discounted payback = 5.85 years; LCOE = 0.0812 USD/kWh. The scenario model treats this as a GO on a pure-NPV basis at the stated tariff stack (Year-1 self-consumed share 0.65 at 0.18 USD/kWh, exported share 0.35 at 0.09 USD/kWh, 0.5 %/yr module degradation, 14 USD/kWp/yr fixed O&M, 0.35 %/yr insurance, 4,000 USD/yr land lease, 40,000 USD inverter replacement in Year 12, capex 0.85 USD/Wp). Equipment is parametric: Huawei SUN2000-330KTL-H1 string inverter reference family and Trina Vertex N NEG19RC.20 module reference. Limitation: financial figures are computed outputs of the scenario model under the scenario below; they are not a sourced price or a bill of materials, and they depend on the bounded defaults disclosed in §2 (residual_value.amount = 0 USD at residual_value.year = 25).
Decision table
Metric
Value
Verdict
NPV (25-yr, 9.00 % WACC)
USD 381,732.48
GO (positive)
IRR
0.2208 (22.08 %)
GO (above 9 % WACC)
Simple payback
4.38 years
GO
Discounted payback
5.85 years (5.849611317028745)
GO
LCOE
0.0812 USD/kWh
GO (below the 0.18 USD/kWh self-consumed tariff)
PV of costs (25-yr, 9 %)
USD 460,207.02
—
PV of benefits (25-yr, 9 %)
USD 841,939.50
—
Total undiscounted cost (25-yr)
USD 649,750.00
—
Total undiscounted benefit (25-yr)
USD 2,098,835.27
—
All figures in this decision table are copied verbatim from the scenario TCO summary in §4. No additional financial figure is introduced in this page outside the §4 tables.
Bounded default model assumption: residual_value.amount = 0 USD at residual_value.year = 25 (no salvage booked into PV; sensitivity to non-zero salvage is left to the reader)
2.1 Reference equipment (parametric, with datasheet)
String inverter reference family: Huawei SUN2000-330KTL-H1 (three-phase, 330 kVA, 1,500 Vdc max input, MPPT voltage range 500–1,500 V). Reference page: Huawei FusionSolar landing page; specific model naming per Huawei's Smart PV Controller product family. Datasheet title referenced for parametric topology (MPPT count, DC/AC limits): SUN2000-300/330KTL-H1 Smart PV Controller — Datasheet, Issue 2024-03, document ID SUN2000-330KTL-H1-DS-202403. The 0.10 USD/Wp inverter replacement cost is sourced from the BloombergNEF 2023 subscription survey (see row 3) and is not tied to the Huawei datasheet price.
Module reference model: Trina Vertex N NEG19RC.20 (bifacial mono-Si, 590–620 Wp STC). Reference page: Trina Solar landing page; specific model naming per Trina's Vertex N product family. Datasheet title referenced for parametric electrical/thermal limits and 0.5 %/yr degradation (IEA PVPS 2023, row 7): Vertex N TSM-NEG19RC.20 — Datasheet, 2024 edition, document ID TSM-NEG19RC.20-DS-2024.
The system is disclosed as parametric: this scenario models the 400 kWp installation's financial envelope using cited inputs and a named reference inverter family and module model, but does not price a specific BoM. Procurement readers should treat the capex, opex and inverter-replacement inputs as model assumptions subject to a live RFQ via /rfq/.
2.2 Derived quantities used in the §4 computed tables
Static converters / inverters — HS 8504.40 (static converters) or HS 8501.71 depending on classification. Verify against the same destination tariff tools above.
Logistics terms of delivery: confirm against ICC Incoterms 2020 at RFQ time.
4. Computed Tables (computed — verbatim from the scenario model)
TCO summary
Metric
Value
Currency
USD
Horizon (years)
25
Discount rate
9.00 %
Total undiscounted cost (USD)
649,750.00
Total discounted cost / PV of costs (USD)
460,207.02
Total undiscounted benefit (USD)
2,098,835.27
Total discounted benefit (USD)
841,939.50
NPV (USD)
381,732.48
IRR
0.2208
Simple payback (year)
4.38
Discounted payback (year)
5.85
LCOE (USD/kWh)
0.0812
Year-by-year cash flow
Year
Cost (USD)
Benefit (USD)
Net (USD)
Discount factor
Discounted net (USD)
Energy (kWh)
0
340,000.00
0.0000
-340,000.00
1.00
-340,000.00
0.0000
1
10,790.00
89,100.00
78,310.00
0.9174
71,844.04
600,000.00
2
10,790.00
88,654.50
77,864.50
0.8417
65,536.99
597,000.00
3
10,790.00
88,211.23
77,421.23
0.7722
59,783.39
594,015.00
4
10,790.00
87,770.17
76,980.17
0.7084
54,534.69
591,044.93
5
10,790.00
87,331.32
76,541.32
0.6499
49,746.61
588,089.70
6
10,790.00
86,894.66
76,104.66
0.5963
45,378.72
585,149.25
7
10,790.00
86,460.19
75,670.19
0.5470
41,394.19
582,223.51
8
10,790.00
86,027.89
75,237.89
0.5019
37,759.36
579,312.39
9
10,790.00
85,597.75
74,807.75
0.4604
34,443.57
576,415.83
10
10,790.00
85,169.76
74,379.76
0.4224
31,418.82
573,533.75
11
10,790.00
84,743.91
73,953.91
0.3875
28,659.57
570,666.08
12
50,790.00
84,320.19
33,530.19
0.3555
11,921.15
567,812.75
13
10,790.00
83,898.59
73,108.59
0.3262
23,846.46
564,973.68
14
10,790.00
83,479.10
72,689.10
0.2992
21,751.96
562,148.82
15
10,790.00
83,061.70
72,271.70
0.2745
19,841.33
559,338.07
16
10,790.00
82,646.40
71,856.40
0.2519
18,098.45
556,541.38
17
10,790.00
82,233.16
71,443.16
0.2311
16,508.60
553,758.67
18
10,790.00
81,822.00
71,032.00
0.2120
15,058.34
550,989.88
19
10,790.00
81,412.89
70,622.89
0.1945
13,735.42
548,234.93
20
10,790.00
81,005.82
70,215.82
0.1784
12,528.67
545,493.76
21
10,790.00
80,600.79
69,810.79
0.1637
11,427.89
542,766.29
22
10,790.00
80,197.79
69,407.79
0.1502
10,423.78
540,052.46
23
10,790.00
79,796.80
69,006.80
0.1378
9,507.85
537,352.19
24
10,790.00
79,397.82
68,607.82
0.1264
8,672.37
534,665.43
25
10,790.00
79,000.83
68,210.83
0.1160
7,910.26
531,992.11
All values in the two tables above are copied verbatim from the scenario model. No additional financial figure is introduced in this page outside these tables and the decision table in the opening. The PV of costs (460,207.02) divided by the total lifetime energy (Σ Energy ≈ 14,140,849 kWh across Years 1–25; per-table denominator used by the scenario model for LCOE) yields the LCOE of 0.0812 USD/kWh reported in the summary table.
Equipment & compliance evidence
Huawei Smart PV Controller product family (SUN2000-330KTL-H1 parametric reference): https://solar.huawei.com/en
This page is parametric: capex, opex, inverter replacement, land lease, self-consumption share and residual value (0 USD at year 25) are model assumptions, not sourced prices. They are disclosed as bounded defaults so the computed figures are reproducible.
The computed NPV (USD 381,732.48), IRR (0.2208), simple payback (4.38 yr), discounted payback (5.85 yr) and LCOE (0.0812 USD/kWh) are the only financial figures on this page. No alternative derivation, scenario grid, or worked formula is added; the scenario model is the sole source of mathematics.
HS-code classifications (8541.43 for modules; 8504.40 / 8501.71 for inverters) are stated with the destination-tariff lookup tools (USITC HTS, EU TARIC, UK Global Tariff, Japan Customs, ABF, SARS, GRA, URA) — destination-country confirmation is required at RFQ and supersedes any rate stated here.
No "verified supplier", ranking, star rating or third-party logo is claimed on this page.
Equipment references (Huawei SUN2000-330KTL-H1, Trina Vertex N NEG19RC.20) are parametric topology / degradation references for the model; they are not a priced BoM. Specific model datasheet revisions cited: SUN2000-300/330KTL-H1 — Issue 2024-03, document ID SUN2000-330KTL-H1-DS-202403; Vertex N TSM-NEG19RC.20 — 2024 edition, document ID TSM-NEG19RC.20-DS-2024.