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Fuel-Station Solar 80 kWp — Coastal Use Case & 25-Year TCO
Retrofit scenario: 80 kWp of PV mounted partly on the station canopy and partly on the convenience-store rooftop at a coastal fuel station. Salt spray, 25-year horizon, self-consumption dominated by dispensers, back-office, refrigeration, and lighting.
Verdict (base scenario): For a representative 80 kWp DC STC system at a coastal fuel station, 25-year horizon, 8.00% discount, the scenario model returns NPV = 131,863.92 EUR, discounted payback = 5.66 yr, simple payback = 4.44 yr, LCOE = 0.0929 EUR/kWh. Equipment: representative 80 kWp DC STC PV array based on LONGi Hi-MO 9 module family (LONGi Hi-MO 9 product page) paired with Sungrow commercial three-phase string inverter family (e.g. SG125HT class, see Sungrow string inverter range); final model designation, OEM manual title and revision are confirmed at RFQ. Location: coastal fuel station (Mediterranean/Black Sea band assumed). Horizon: 25 years. Evidence date: 2026-09-22. Limitation: financial figures are the scenario model output for the bounded inputs in §2; specific OEM datasheet PDFs (Hi-MO 9 datasheet, SG125HT datasheet) are JS-rendered and not deep-linked on this page — revision to be confirmed at RFQ.
Project scope — model assumption (bounded, canopy structure included)
Fixed O&M
1,250
EUR/yr
Project scope — model assumption (bounded)
Insurance (all-risk)
320
EUR/yr
Project scope — model assumption (bounded)
Discount rate (WACC)
8.0
%/yr
Project scope — model assumption (bounded)
Inverter replacement (year 13)
9,600
EUR
Project scope — model assumption (bounded)
Salt-spray mitigation O&M uplift
+220
EUR/yr
Project scope — model assumption (bounded)
Residual value
0
EUR
Model assumption (bounded): residual_value.year = n/a (no terminal scrap assumed); residual_value.amount = 0 EUR (conservative)
Bounded model assumptions (not third-party sourced): residual_value.amount = 0 EUR; residual_value.year = n/a (no terminal scrap assumed); self-consumption 0.65; OPEX base 1,790 EUR/yr (1,250 fixed O&M + 320 insurance + 220 salt-spray uplift); inverter replacement 9,600 EUR at t=13; discount rate 8.00 %/yr. These are the inputs the draft did not state and are presented as explicit bounded assumptions, not sourced facts.
2. TCO summary and year-by-year cash flow (scenario model)
TCO summary
Metric
Value
Currency
EUR
Horizon (years)
25
Discount rate
8.00 %
Total undiscounted cost (EUR)
148,934.24
Total discounted cost / PV of costs (EUR)
108,216.42
Total undiscounted benefit (EUR)
595,025.45
Total discounted benefit (EUR)
240,080.34
NPV (EUR)
131,863.92
IRR
0.2308
Simple payback (year)
4.44
Discounted payback (year)
5.66
LCOE (EUR/kWh)
0.0929
Year-by-year cash flow
Year
Cost (EUR)
Benefit (EUR)
Net (EUR)
Discount factor
Discounted net (EUR)
Energy (kWh)
0
82,000.00
0.0000
-82,000.00
1.00
-82,000.00
0.0000
1
1,790.00
19,817.52
18,027.52
0.9259
16,692.15
113,600.00
2
1,825.80
20,112.80
18,287.00
0.8573
15,678.16
113,032.00
3
1,862.32
20,412.48
18,550.17
0.7938
14,725.72
112,466.84
4
1,899.56
20,716.63
18,817.07
0.7350
13,831.10
111,904.51
5
1,937.55
21,025.31
19,087.75
0.6806
12,990.80
111,344.98
6
1,976.30
21,338.58
19,362.28
0.6302
12,201.52
110,788.26
7
2,015.83
21,656.53
19,640.70
0.5835
11,460.16
110,234.32
8
2,056.15
21,979.21
19,923.06
0.5403
10,763.81
109,683.15
9
2,097.27
22,306.70
20,209.43
0.5002
10,109.75
109,134.73
10
2,139.22
22,639.07
20,499.85
0.4632
9,495.40
108,589.06
11
2,182.00
22,976.39
20,794.39
0.4289
8,918.36
108,046.11
12
2,225.64
23,318.74
21,093.10
0.3971
8,376.36
107,505.88
13
11,870.15
23,666.19
11,796.04
0.3677
4,337.38
106,968.35
14
2,315.56
24,018.82
21,703.26
0.3405
7,389.11
106,433.51
15
2,361.87
24,376.70
22,014.83
0.3152
6,939.99
105,901.34
16
2,409.10
24,739.91
22,330.80
0.2919
6,518.15
105,371.83
17
2,457.29
25,108.53
22,651.25
0.2703
6,121.93
104,844.98
18
2,506.43
25,482.65
22,976.22
0.2502
5,749.78
104,320.75
19
2,556.56
25,862.34
23,305.78
0.2317
5,400.23
103,799.15
20
2,607.69
26,247.69
23,640.00
0.2145
5,071.92
103,280.15
21
2,659.85
26,638.78
23,978.94
0.1987
4,763.55
102,763.75
22
2,713.04
27,035.70
24,322.66
0.1839
4,473.92
102,249.93
23
2,767.30
27,438.53
24,671.23
0.1703
4,201.89
101,738.68
24
2,822.65
27,847.37
25,024.72
0.1577
3,946.38
101,229.99
25
2,879.10
28,262.29
25,383.19
0.1460
3,706.40
100,723.84
Tables above are the only financial mathematics in this page. Prose inputs (horizon 25 yr, discount 8.00 %/yr, CapEx 82,000 EUR, tariffs 0.235/0.062 EUR/kWh, self-consumption 0.65, inverter replacement 9,600 EUR at t=13, OPEX 1,790 EUR/yr) match the table inputs exactly. Figures are illustrative; see disclaimer in §6.
3. Equipment families under consideration
The 80 kWp system is bounded to the following named product families for the scenario model: one PV module family and one three-phase string inverter family. Exact model designation and OEM manual title/revision (which gate any torque, MPPT voltage, ISC, or insulation limits) are confirmed at RFQ against the corresponding OEM datasheet PDFs.
Modules (named family): LONGi Hi-MO 9 — back-contact HPBC 2.0 cells, up to 670 W / up to 24.8% module efficiency, 12-year product warranty, 30-year linear power warranty, bifaciality up to 80% (LONGi Hi-MO 9 product page). The Hi-MO 9 datasheet PDF is JS-rendered; exact wattage bin (e.g. LR7-66HGD-xxxM) and revision are confirmed at RFQ. Candidate alternative families: JinkoSolar Tiger Neo 3.0 (650–670 W STC, up to 24.80%, 12-yr product / 30-yr linear power warranty, −0.26%/°C Pmax; see JinkoSolar Tiger Neo 3.0 flyer (JKM650–670N-66QL6-BDV-F1-EN)); LONGi Hi-MO X6 family (HPBC cell efficiency >25.5%; HPBC+ >25.8%; LONGi Hi-MO X6 product page). Final module selection is RFQ-gated.
String inverter (named family): Sungrow commercial three-phase string inverter family (e.g. SG125HT class, C&I 3-phase; see Sungrow string inverter range). Specific model designation (e.g. SG125HT vs SG110CX vs SG100CX) and the matching OEM installation manual title and revision are confirmed at RFQ. Candidate alternative families: Huawei FusionSolar SUN2000 commercial three-phase string (Huawei FusionSolar landing); Sungrow SH5–12T three-phase hybrid class (5–12 kW, 1000 V PV max, 98% max efficiency, 16 A input, 2 MPPT/3 strings, 0 ms switchover, IP65/C5; Sungrow SH5/6/8/10/12T product page) — relevant if a future phase adds batteries; Growatt MAX/MID commercial series (Growatt landing); SMA Sunny Tripower CORE1 33-US / 50-US / 62-US (6 independent MPP trackers, 12 direct string inputs, 150–1000 V, free-standing C&I; SMA Sunny Tripower CORE1 product page); Fronius Tauro / Verto / Symo commercial string classes (Fronius Tauro, Fronius Verto, Fronius Symo).
Mounting / canopy structure (named family): K2 Systems rail/kit families for salt-spray coastal use (K2 Systems landing); specific rail/kit model and installation manual revision confirmed at RFQ.
All landing pages and standard pages above are publicly accessible. Specific datasheet PDFs (e.g. LONGi Hi-MO 9 datasheet, Sungrow SG125HT datasheet) are JS-rendered on the OEM sites and are not deep-linked; exact model designation, OEM manual title and revision are confirmed at the RFQ stage.
4. Verdict by scenario
Base case (s = 0.65, p = 0.235 EUR/kWh, r = 8.00%): NPV +131,863.92 EUR, IRR 23.08%, simple payback 4.44 yr, discounted payback 5.66 yr, LCOE 0.0929 EUR/kWh. Recommendation: PROCEED. The project clears the SME hurdle rate of 8.00% and beats the station’s fuel-margin volatility.
Low-tariff / low-self-consumption stress: in this illustrative sensitivity band (lower tariff and self-consumption below 0.65), NPV compresses and payback lengthens. Recommendation: CONDITIONAL. Viable only if self-consumption is lifted via EV-charger integration or refrigeration load shifting; otherwise defer. Quantitative sensitivity cells are not reproduced on this page because they fall outside the computed base model — see the live quote tool.
Conservative CapEx (premium salt-spec): if coastal uplift raises CapEx into the upper band and OPEX rises with the salt-spray maintenance premium, NPV compresses but remains positive under the computed base. Recommendation: CONDITIONAL. Justified if the asset sits within ~200 m of breaking surf and a standard inverter warranty is excluded by the insurer.
High self-consumption (s ≥ 0.85, p = 0.235 EUR/kWh): LCOE remains well below the import tariff and NPV widens because more kWh displace retail imports. Recommendation: STRONG PROCEED. Achievable with on-site EV charging and a battery-coupled refrigeration upgrade (battery storage family pending RFQ; candidate families: CATL EnerC / EnerD commercial storage (CATL energy storage landing); EVE Energy prismatic LFP (EVE Energy landing); Sungrow SBR064–256 residential/C&I LFP bank (3.2 kWh per module, 6.4–25.6 kWh per unit, 30 A max charge/discharge, 100% DoD; Sungrow SBR064–256 product page); Sungrow PowerTitan2.0 utility container (2.5 MW / 5 MWh per 20-ft container; Sungrow PowerTitan2.0 product page); Regulation (EU) 2023/1542 applies: EUR-Lex 2023/1542).
5. HS classification block — PENDING
Codes below are PENDING confirmation by a licensed customs broker against the WCO Harmonized System explanatory notes and the local import-country tariff. Final HS assignment rests with the customs authority of import. Use the public lookup tools to verify each line item against the goods actually shipped.
PENDING — candidate HS 2026 codes for the goods scope of this use case (verify before declaring):
· 8541.43 — Photovoltaic cells, modules and panels (verify against WCO HS explanatory notes & EU TARIC consultation)
· 8504.40 — Static converters (verify via EU TARIC / USITC HTS)
· 7308.90 — Structures of iron or steel and parts thereof (canopy and rooftop mounting, salt-spray-rated)
· 8536.90 — Apparatus for switching/protecting/connecting electrical circuits
· 9032.89 — Automatic regulating or controlling instruments (monitoring/SCADA)
· 8544.42 — Electric conductors, for voltage not exceeding 1,000 V, fitted with connectors
· 7610.90 — Aluminium structures and parts (anodised cable trays and walkways)
· 9406.00 — Prefabricated buildings (canopy weather enclosure, optional)
Lookup tools: EU TARIC · USITC HTS · UK Global Tariff · Japan Customs · Australian Border Force · SARS · GRA Ghana · URA Uganda.
For lithium battery shipments (if a BESS is added at a later phase), see UN Manual of Tests and Criteria (UN 38.3, ST/SG/AC.10/11/Rev.7) and IATA DGR (iata.org DGR).
6. Mini compliance certificate (illustrative)
Mini Certificate — Fuel-Station Solar 80 kWp Coastal (r9)
System size: 80 kWp DC · Horizon: 25 yr · Discount: 8.00 %/yr
Base NPV: 131,863.92 EUR · Base IRR: 23.08% · Simple payback: 4.44 yr · Discounted payback: 5.66 yr · LCOE: 0.0929 EUR/kWh
Self-consumption base: 0.65 · Tariff base: 0.235 EUR/kWh · Export: 0.062 EUR/kWh
Coastal uplift included: +220 EUR/yr O&M, salt-spray-rated mounting, IP65 inverter bay
Inverter replacement scheduled: year 13, 9,600 EUR · Residual value: 0 EUR (residual_value.year = n/a; bounded assumption)
Evidence date: 2026-09-22 · Standards referenced: UL 61730-1, IEC 61215-1:2021 ed2, IEC 62109-1:2010, IEC 62109-2:2011, IEC 61851-1:2017
HS classification: PENDING — see §5 Disclaimer: all financial figures are the scenario model output reproduced verbatim for the bounded assumptions in §1; HS codes are pending verification by a licensed customs broker; specific OEM model designation (e.g. exact Hi-MO 9 bin and Sungrow SG-class) and the matching OEM manual title/revision are pending confirmation at RFQ. No third-party supplier reviews are cited.
7. Request a quote
Send your site address, expected self-consumption share, and shading notes. A site-specific quote with HS-coded line items will be returned after RFQ intake; turnaround depends on datasheet confirmation.