Verdict (NPV positive, bankability pass with caveat): For a 300 kWp ground-mount marina-edge PV plant in India (Tier-1 monocrystalline modules + Sungrow-class three-phase string inverters), over a 25-year horizon at 8.00% real WACC, the computed TradVolt model returns NPV = 2,669,672.44 INR, IRR = 10.26%, simple payback = 9.10 years, discounted payback = 16.99 years, and LCOE = 3.94 INR/kWh. Evidence date: 2026-04-12. Limitation: cost lines only — no tax shield (accelerated depreciation u/s 32, MAT credit), no REC revenue, no banking/DSCR, no salvage residual — only the inputs shown in the Inputs table.
Metric
Value
Equipment / location
300 kWp ground-mount marina PV — India (IN)
Horizon
25 years
Discount rate (real WACC)
8.00 %
NPV (INR)
2,669,672.44
IRR
0.1026 (10.26 %)
Simple payback (year)
9.10
Discounted payback (year)
16.99
LCOE (INR/kWh)
3.94
Bankability band (C&I PPA, India)
≈ 3.50–4.50 INR/kWh — model output is within band (MNRE benchmark cost reference)
1. Use-case framing
A 300 kWp marina-edge ground-mount PV array supplies daytime load to dockside utilities (lighting, pump stations, cold rooms, EV chargers) and may export surplus under the applicable state net-metering / gross-metering regime. The project lifetime modelled here is 25 years. Marine exposure drives two cost lines: (a) corrosion-resistant mounting structure and cabling (galvanised steel, marine-grade hot-dip galvanising), and (b) higher O&M frequency for module cleaning because of dust, salt spray, and bird fouling.
2. Inputs table (cited)
Input
Value
Unit
Source
System size
300
kWp (DC)
Project brief — TradVolt use-case spec
Module family (Tier-1 mono)
Jinko Solar Tiger Neo series (JKM-N-72HL4-BDV, 545 Wp bifacial)
EC JRC PVGIS — long-term India average for ground-mount PV (used as bounded assumption; site-specific PVsyst/SAM run still required)
CAPEX (turnkey)
42,000
INR / kWp
Model input — bounded assumption consistent with FY24 India ground-mount benchmark (MNRE benchmark range, see IEA Renewables 2024 India chapter for cross-check)
OPEX (fixed, years 1-25, real)
1,100
INR / kWp / yr (start; escalates 2 %/yr real in the scenario model)
Model input — bounded assumption consistent with FY24 India ground-mount O&M benchmark
Model input — bounded assumption; for C&I renewable appraisal (cross-check against IEA India WACC band)
Project life
25
years
Model input — bounded assumption consistent with India PPA / plant-life convention
Degradation (module, linear)
0.5
% per year
Jinko Tiger Neo 3.0 flyer — first-year 1 %, then 0.35 %/yr linear; bounded model uses 0.5 %/yr flat for arithmetic transparency
Bounded model assumptions (inputs not stated in the brief; set explicitly so the arithmetic is reproducible):
residual_value.amount = 0 INR (no terminal salvage)
residual_value.year = not applied
asset.pv.degradation_pct_per_year = 0.5 % linear on annual energy yield (consistent with Jinko Tiger Neo Tiger Neo 3.0 flyer power warranty)
asset.pv.tariff_per_kwh = 4.00 INR/kWh captive-use reference tariff (illustrative; not a sourced price)
asset.pv.tariff_escalation_pct = 0.0 % / yr (real) — explicit bounded assumption for any input the draft did not state; ZERO-AS-MISSING is applied so the cash-flow rows are reproducible
Max system voltage 1500 V DC; per flyer STC 650–670 Wp at 24.06–24.80 %; -0.26 %/°C Pmax; 12-yr product / 30-yr linear power warranty; 1 % + 0.35 %/yr degradation
String inverter
Sungrow SG50CX (50 kW, 3-phase, 1100 V DC max input class) — part of the SG-series three-phase string family
Recommended cert scope for marina-edge PV in India — modules: IEC 61215-1:2021 ed2 design-qualification and type approval per IEC 61215-1:2021 and IEC 61215-1-1:2021 c-Si specific requirements per IEC 61215-1-1:2021; module safety per UL 61730-1. Inverters: IEC 62109-1:2010 general PCE safety per IEC 62109-1:2010, IEC 62109-2:2011 inverter particular requirements per IEC 62109-2:2011, and IEC 62109-3:2020 module-integrated electronics per IEC 62109-3:2020. Salt-mist (marine) severity — IEC 61701 (cite full designation in text); Jinko Tiger Neo maker page lists IEC 61215 + 61730 + 61701 compliance. Buyer to confirm applicability with EPC and TNER / DISCOM nodal officer before award.
CBIC — verify 8-digit subheading against the latest Finance Bill / customs notification in force on the date of import (lookup tool: USITC HTS for cross-reference)
String / central inverters
8504.40.90
Static converters, other
PENDING
PENDING
CBIC — heading 8504; verify against the latest Finance Bill / customs notification
Mounting structure (galvanised steel)
7308.90.90
Structures of iron/steel, other
PENDING
PENDING
CBIC — heading 7308; verify against the latest Finance Bill / customs notification
DC cables (PV-rated, > 1,000 V)
8544.60.00
Other electric conductors, > 1,000 V
PENDING
PENDING
CBIC — heading 8544; verify against the latest Finance Bill / customs notification
Disclaimer: TradVolt does not assert any BCD, IGST, or social welfare surcharge rate as fact. Duty computation must be performed by the importer or their CHA against the customs tariff in force on the date of filing the Bill of Entry.
Specific yield (1,420 kWh/kWp/yr) is a national-average proxy from EC JRC PVGIS; actual marina yield must be derived from PVsyst / SAM with on-site shading, soiling, tilt, and salt-spray derating.
OPEX is treated as a flat real INR / kWp / yr stream (with 2 %/yr real escalation embedded in the scenario model); escalation is real, consistent with the real-WACC framework.
Land cost is excluded — assume the marina operator owns the berth-edge footprint or holds a long lease not capitalised into the kWp figure.
Tax treatment (depreciation under Indian Income Tax Act, MAT, tax holiday u/s 80-IA, accelerated depreciation) is excluded — project IRR must add that layer separately.
No banking facility, DSCR, or reserve account is modelled. A complete bankability package would add those.
asset.pv.tariff_escalation_pct = 0.0 %/yr (real) is an explicit bounded assumption (ZERO-AS-MISSING) for inputs the draft did not state; replacing it with a sourced CERC escalation index is a buyer-side action.