Verdict (computed TradVolt TCO model, evidence date 2026-09-22): A 1 MWp floating-PV plant at sea over a 25-year horizon at a 7.00% discount rate yields NPV = +7,258.03 USD, IRR = 7.07%, simple payback = 12.07 years, discounted payback = 24.37 years, and LCOE = 0.0963 USD/kWh. Equipment family modelled: LONGi Hi-MO 6 LR5-72HTH 580 W modules + Sungrow SG125HV 125 kW string inverters on a Ciel & Terre SolarFloat-type HDPE float system, deployed at a low-latitude open-sea exhibition site. Limitation: this is a model scenario, not a commercial quotation; confirm exact OEM datasheet revisions, mooring design and customs duty at RFQ stage.
| Item | Value |
|---|---|
| Equipment family | LONGi Hi-MO 6 LR5-72HTH + Sungrow SG125HV + Ciel & Terre-type float |
| Location / horizon | Open sea, low latitude; 25 years |
| Discount rate | 7.00% |
| NPV (USD) | +7,258.03 |
| IRR | 7.07% |
| Simple payback (yr) | 12.07 |
| Discounted payback (yr) | 24.37 |
| LCOE (USD/kWh) | 0.0963 |
| Evidence date | 2026-09-22 |
Audience: B2B buyers, EPCs and exhibition operators evaluating 1 MWp floating PV to power cruise-ship-scale venues, event barges or marine expos.
The modelled 1 MWp DC floating-PV array uses LONGi Hi-MO 6 LR5-72HTH 580 W bifacial monocrystalline modules (LR5-72HTH product family), AC-coupled via Sungrow SG125HV 125 kW three-phase string inverters (eight units for ~1 MWp DC / ~1 MW AC at 1500 V DC), mounted on a Ciel & Terre SolarFloat-type HDPE float system with HDPE pontoons, aluminium-framed module supports and stainless-steel mooring. Reference datasheets:
Typical configurations: pontoon-mounted FPV on a sheltered berth, barge-mounted rigid frames on an event barge, or nearshore tethered platforms near port. Service life assumed: 25 years. Marine exposure drives higher corrosion-related opex versus land-based equivalents; the inverter DC-AC voltage limit of the Sungrow SG125HV (max 1500 V DC, 800 V AC) and the LONGi Hi-MO 6 max system voltage of 1500 V DC must be respected during string design.
The COMPUTED TABLES below are the only mathematics in this page. The following inputs are explicit bounded assumptions used by the model; they match the COMPUTED TABLES verbatim.
| Parameter | Value | Unit | Source / basis |
|---|---|---|---|
| Nameplate capacity | 1.0 | MWp DC | Model assumption (system specification) |
| Annual energy yield (Yr 1) | 1,300,000 | kWh/yr | Model assumption (low-latitude open sea, FPV performance ratio band) |
| Annual degradation | 0.5 | %/yr | Model assumption, bounded by IEC 61215-1-1:2021 / IEC 61215-1-2:2021 / IEC 61215-1-3:2021 / IEC 61215-1-4:2021 Crystalline silicon PV modules — Design qualification and type approval (cite via IEC Webstore catalogue + full designation in text; datasheet-allowed range confirmed at RFQ). |
| CapEx | 1,100,000 | USD | Model assumption (FPV turnkey, SE Asia, 2025 scope) |
| OpEx (Yr 1) | 18,000 | USD/yr | Model assumption (marine O&M, Yr 1); escalates at 2.5%/yr (model assumption) |
| Inverter replacement | 60,000 | USD, Yr 12 | Model assumption (string-inverter replacement reserve) |
| Decommissioning reserve | 45,000 | USD, Yr 25 | Model assumption (end-of-life removal reserve) |
| Discount rate (r) | 0.07 | — | Model assumption (B2B WACC convention) |
| Horizon | 25 | years | Model assumption (asset life) |
| Tariff (per kWh, electricity benefit) | 0.085 | USD/kWh | Model assumption (bounded default — tariff_per_kwh) |
| Tariff escalation | 1.0 | %/yr | Model assumption (bounded default — tariff_escalation_pct) |
| Self-consumption share | 100 | % | Model assumption (bounded default — self_consumption_pct; on-site exhibition use) |
| Export tariff | 0.000 | USD/kWh | Model assumption (bounded default — export_tariff_per_kwh; ZERO-AS-MISSING — no export revenue modelled) |
| Metric | Value |
|---|---|
| Currency | USD |
| Horizon (years) | 25 |
| Discount rate | 7.00 % |
| Total undiscounted cost (USD) | 1,819,839.75 |
| Total discounted cost / PV of costs (USD) | 1,398,296.86 |
| Total undiscounted benefit (USD) | 3,117,974.47 |
| Total discounted benefit (USD) | 1,405,554.89 |
| NPV (USD) | 7,258.03 |
| IRR | 0.0707 |
| Simple payback (year) | 12.07 |
| Discounted payback (year) | 24.37 |
| LCOE (USD/kWh) | 0.0963 |
| Year | Cost (USD) | Benefit (USD) | Net (USD) | Discount factor | Discounted net (USD) | Energy (kWh) |
|---|---|---|---|---|---|---|
| 0 | 1,100,000.00 | 0.0000 | -1,100,000.00 | 1.00 | -1,100,000.00 | 0.0000 |
| 1 | 18,000.00 | 110,500.00 | 92,500.00 | 0.9346 | 86,448.60 | 1,300,000.00 |
| 2 | 18,450.00 | 111,596.71 | 93,146.71 | 0.8734 | 81,357.95 | 1,293,500.00 |
| 3 | 18,911.25 | 112,704.31 | 93,793.06 | 0.8163 | 76,563.08 | 1,287,032.50 |
| 4 | 19,384.03 | 113,822.90 | 94,438.87 | 0.7629 | 72,046.96 | 1,280,597.34 |
| 5 | 19,868.63 | 114,952.59 | 95,083.96 | 0.7130 | 67,793.55 | 1,274,194.35 |
| 6 | 20,365.35 | 116,093.50 | 95,728.15 | 0.6663 | 63,787.71 | 1,267,823.38 |
| 7 | 20,874.48 | 117,245.72 | 96,371.24 | 0.6227 | 60,015.17 | 1,261,484.26 |
| 8 | 21,396.34 | 118,409.39 | 97,013.05 | 0.5820 | 56,462.48 | 1,255,176.84 |
| 9 | 21,931.25 | 119,584.60 | 97,653.35 | 0.5439 | 53,116.95 | 1,248,900.96 |
| 10 | 22,479.53 | 120,771.48 | 98,291.95 | 0.5083 | 49,966.64 | 1,242,656.45 |
| 11 | 23,041.52 | 121,970.14 | 98,928.61 | 0.4751 | 47,000.27 | 1,236,443.17 |
| 12 | 83,617.56 | 123,180.69 | 39,563.13 | 0.4440 | 17,566.50 | 1,230,260.95 |
| 13 | 24,208.00 | 124,403.26 | 100,195.26 | 0.4150 | 41,577.47 | 1,224,109.65 |
| 14 | 24,813.20 | 125,637.96 | 100,824.76 | 0.3878 | 39,101.58 | 1,217,989.10 |
| 15 | 25,433.53 | 126,884.92 | 101,451.39 | 0.3624 | 36,770.65 | 1,211,899.16 |
| 16 | 26,069.37 | 128,144.25 | 102,074.88 | 0.3387 | 34,576.29 | 1,205,839.66 |
| 17 | 26,721.10 | 129,416.08 | 102,694.98 | 0.3166 | 32,510.60 | 1,199,810.46 |
| 18 | 27,389.13 | 130,700.54 | 103,311.41 | 0.2959 | 30,566.12 | 1,193,811.41 |
| 19 | 28,073.86 | 131,997.74 | 103,923.88 | 0.2765 | 28,735.82 | 1,187,842.35 |
| 20 | 28,775.70 | 133,307.82 | 104,532.11 | 0.2584 | 27,013.08 | 1,181,903.14 |
| 21 | 29,495.10 | 134,630.90 | 105,135.80 | 0.2415 | 25,391.67 | 1,175,993.62 |
| 22 | 30,232.47 | 135,967.11 | 105,734.63 | 0.2257 | 23,865.70 | 1,170,113.66 |
| 23 | 30,988.29 | 137,316.58 | 106,328.30 | 0.2109 | 22,429.62 | 1,164,263.09 |
| 24 | 31,762.99 | 138,679.45 | 106,916.46 | 0.1971 | 21,078.22 | 1,158,441.77 |
| 25 | 77,557.07 | 140,055.84 | 62,498.78 | 0.1842 | 11,515.35 | 1,152,649.56 |
| Scope | Standard (designation, edition) | Status |
|---|---|---|
| Crystalline silicon PV modules — design qualification and type approval | IEC 61215-1-1:2021 / IEC 61215-1-2:2021 / IEC 61215-1-3:2021 / IEC 61215-1-4:2021 (full designation in text) — IEC Webstore catalogue | Manufacturer-declared per shipment (LONGi Hi-MO 6 LR5-72HTH datasheet) |
| PV module safety qualification | IEC 61730-1:2016 / IEC 61730-2:2016 — IEC Webstore catalogue; equivalent UL 61730-1 — UL 61730-1 product page | Manufacturer-declared per shipment |
| Stationary batteries (if BESS added later) | UL 1973 — UL 1973 product page; UN 38.3 lithium battery provisions via UN Manual of Tests and Criteria, ST/SG/AC.10/11/Rev.7 — UN Manual of Tests and Criteria page | Not in this scenario (PV-only) |
| EV conductive charging (if EV demos added) | IEC 61851-1:2017 Electric vehicle conductive charging system — Part 1 — IEC 61851-1:2017 product page | Not in this scenario (PV-only) |
| Electrical safety of PV installations | IEC 62548:2016 PV array installations — IEC Webstore catalogue + full designation in text | Design-stage |
| Floating solar / mooring (site-specific) | DNV-OS-E301 Offshore standard — Position mooring (class society document; exact revision confirmed at RFQ); site-specific mooring design required. | Verify with float supplier and class society |
| EU battery regulation (if BESS added later) | Regulation (EU) 2023/1542 — EUR-Lex document page | Not in this scenario |
| Component | HS 2022 subheading | Description (subheading text) | Duty rate |
|---|---|---|---|
| Crystalline silicon PV modules | 8541.43 | Photovoltaic cells assembled in modules or made up into panels | PENDING — verify at importer customs portal (see lookup list below) |
| Power inverters > 1 kW | 8504.40 | Static converters (inverters) | PENDING — verify at importer customs portal |
| Mounting / float structures (aluminium) | 7610.90 | Aluminium structures and parts | PENDING — verify at importer customs portal |
| HDPE float pontoons | 3925.90 | Builders' ware of plastics, n.e.c. | PENDING — verify at importer customs portal |
| Cables, insulated | 8544.49 | Other electric conductors | PENDING — verify at importer customs portal |
Lookup instructions (use the destination country's official tariff database):
Disclaimer: Duty rates above are marked PENDING. TradVolt does not assert any specific rate as fact; confirm national duty, VAT/GST and any anti-dumping measures (notably EU AD/CVD on Chinese PV modules) via a licensed customs broker in the importing jurisdiction.
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© 2026 TradVolt. This page is a research artifact under review; financial figures shown are model outputs of the computed TradVolt TCO model (evidence date 2026-09-22), not commercial quotations. Inputs that are not sourced from an allow-listed OEM datasheet or regulator page are explicit model assumptions, bounded by the input table in section 2.