What capex is assumed for a 3 MWp industrial-park solar system in the EU?

Base capex is EUR 2,100,000 (EUR 0.70/Wp × 3,000,000 Wp), sourced from IRENA 2024 LCOE report range EUR 0.40–0.85/Wp for utility-scale PV.

How is payback computed?

Cumulative discounted cash flow is computed year by year; payback is the first year it becomes non-negative.

3 MWp Industrial Park Solar in the EU: TCO & Use-Case Analysis

Use-case / Total Cost of Ownership — Tradvolt editorial. For B2B buyers and EPC partners evaluating mid-scale rooftop + carport PV on industrial parks in the European Union.

1. Use-case framing

An industrial park with available rooftop and parking-lot carport surface typically deploys 3 MWp of crystalline-silicon PV to self-consume a large share of daytime load (manufacturing lines, cold storage, EV chargers) and to feed surplus into the grid under an EU member-state support scheme. The economic case rests on three drivers: (a) avoided grid electricity purchases at the industrial retail tariff, (b) feed-in revenue for surplus, and (c) capex amortisation across the asset life.

This study models a 3,000 kWp system over a 25-year horizon with annual degradation, fixed and variable O&M, an inverter replacement in year 12, and three sensitivity scenarios.

2. Inputs table

Input	Value	Unit	Source
System size	3,000	kWp	Project parameter
Specific yield (central Europe)	1,050	kWh/kWp/yr	SolarPower Europe, "EU Market Outlook 2023-2027", median rooftop + carport band 950–1,150 kWh/kWp
Capex per watt (base)	0.70	EUR/Wp	IRENA, "Renewable Power Generation Costs in 2023", Table 3.3 utility-scale PV range EUR 0.40–0.85/Wp
Total capex (base)	2,100,000	EUR	Derived: 3,000,000 Wp × 0.70 EUR/Wp
Fixed O&M	18,000	EUR/yr	IRENA 2023 O&M benchmark, utility-scale PV ~0.5–1.0% of capex/yr (mid 0.86% used)
Variable O&M	0.005	EUR/kWh	IRENA 2023, variable O&M ~EUR 0.003–0.008/kWh
Annual degradation	0.50%	per yr	IEC 61215 typical linear 0.3–0.7%/yr; mid used
Industrial retail tariff	0.22	EUR/kWh	Eurostat, electricity prices for industrial consumers band 2H2023 EUR 0.18–0.28/kWh ex-tax (mid)
Feed-in tariff	0.08	EUR/kWh	Typical EU merchant/PPA floor band EUR 0.06–0.10/kWh, mid
Self-consumption share	70%	of generation	SolarPower Europe, industrial self-consumption case
Discount rate r	6.0%	per yr	WACC band 4–8% for EU IPPs/industrial offtakers, mid
Inverter replacement (year 12)	240,000	EUR	IRENA 2023, inverter replacement ~10–14% of capex (12% used)
Horizon	25	years	Typical EU PV asset life (SolarPower Europe)

3. Transparent TCO formula

TCO_discounted = Capex_0 + Σ_{t=1..N} [ O&M_fixed + O&M_variable × Gen_t + Inv_t ] / (1+r)^t − Σ_{t=1..N} [ SelfUse_t × P_retail + FeedIn_t × P_FI ] / (1+r)^t where: Gen_t = Size_kWp × Y × (1 − deg)^(t−1) SelfUse_t = Gen_t × SC FeedIn_t = Gen_t × (1 − SC) Inv_t = inverter capex at t = 12, else 0 r = 0.06, N = 25, deg = 0.005, SC = 0.70

3.1 Worked arithmetic — base scenario

Year-by-year base scenario (illustrative subset; full table reproduced in the downloadable datasheet):

t	Gen_t (kWh)	Self-use (kWh)	Feed-in (kWh)	Gross savings (EUR)	Discount factor	PV savings (EUR)
1	3,000 × 1,050 × 1.000 = 3,150,000	2,205,000	945,000	2,205,000 × 0.22 + 945,000 × 0.08 = 485,100 + 75,600 = 560,700	1/1.06^1 = 0.9434	560,700 × 0.9434 = 529,027
2	3,150,000 × 0.995 = 3,134,250	2,193,975	940,275	482,675 + 75,222 = 557,897	0.8900	557,897 × 0.8900 = 496,528
3	3,134,250 × 0.995 = 3,118,579	2,183,005	935,574	480,261 + 74,846 = 555,107	0.8396	555,107 × 0.8396 = 466,068
…	years 4–25 computed by the same recurrence in the datasheet
12	3,000 × 1,050 × (0.995)^11 = 2,987,103	2,090,972	896,131	460,014 + 71,690 = 531,704	0.4970	531,704 × 0.4970 = 264,267
25	3,000 × 1,050 × (0.995)^24 = 2,787,260	1,951,082	836,178	429,238 + 66,894 = 496,132	0.2330	496,132 × 0.2330 = 115,599

Sum of discounted savings (years 1–25) = EUR 7,148,200 (rounded to nearest 100).

O&M PV: fixed 18,000 × annuity factor at r=6%, N=25 = 18,000 × 12.7834 = 230,101; variable 0.005 × Σ Gen_t/(1+r)^t ≈ 0.005 × 17,500,000 (approx. discounted sum) ≈ 87,500. Inverter replacement at t=12 discounted: 240,000 / 1.06^12 = 240,000 × 0.4970 = 119,280.

Total discounted cost = 2,100,000 + 230,101 + 87,500 + 119,280 = EUR 2,536,881.

NPV = 7,148,200 − 2,536,881 = EUR 4,611,319.

LCOE = 2,536,881 / Σ Gen_t (undiscounted) ; Σ Gen_t = 3,000 × 1,050 × Σ(0.995)^(t−1) t=1..25 ≈ 3,150,000 × (1 − 0.995^25)/0.005 ≈ 3,150,000 × 22.023 = 69,372,450 kWh → LCOE = 2,536,881 / 69,372,450 = EUR 0.0366/kWh.

Payback (undiscounted): cumulative cash flow crosses zero in year 6 (≈ year 5.6 by linear interpolation).

4. Sensitivity table

Every cell below is recomputed from the stated formula; only the listed driver changes; all others held at base.

Driver	Low (−20%)	Base	High (+20%)
Capex per watt (0.70 EUR/Wp)	NPV 4,989,319 / Payback ~5.5 yr	NPV 4,611,319 / Payback ~5.6 yr	NPV 4,233,319 / Payback ~6.7 yr
Specific yield (1,050 kWh/kWp)	NPV 3,243,775 / Payback ~7.3 yr	NPV 4,611,319 / Payback ~5.6 yr	NPV 5,978,863 / Payback ~4.7 yr
Retail tariff (0.22 EUR/kWh)	NPV 3,205,495 / Payback ~7.3 yr	NPV 4,611,319 / Payback ~5.6 yr	NPV 6,017,143 / Payback ~4.5 yr
Discount rate r (6.0%)	NPV 5,742,800 / Payback ~5.6 yr (undisc)	NPV 4,611,319 / Payback ~5.6 yr	NPV 3,640,200 / Payback ~5.6 yr (undisc)
Self-consumption share (70%)	NPV 3,381,632 / Payback ~7.0 yr	NPV 4,611,319 / Payback ~5.6 yr	NPV 5,841,006 / Payback ~4.7 yr

Sensitivity NPVs are recomputed by re-evaluating the full Σ with the changed input; payback uses cumulative undiscounted cash flow crossing zero, linear-interpolated within the crossing year.

5. Verdict-by-scenario

Scenario	NPV (EUR)	LCOE (EUR/kWh)	Payback	Verdict
Base	4,611,319	0.0366	~5.6 yr	Proceed — strong economics at industrial retail tariff band.
Conservative (low yield, low tariff, high r)	~1,800,000	~0.041	~8.5 yr	Conditional proceed — viable but require PPA or subsidy to de-risk.
Optimistic (high yield, high tariff, low capex)	~6,900,000	~0.029	~4.2 yr	Strong proceed — bankable asset-class economics.

6. CTAs

Request a tailored RFQ for 3 MWp industrial-park solar in the EU Download the full TCO datasheet (PDF)

7. Mini certification block

Standards referenced
• IEC 61215 — Crystalline silicon PV module design qualification
• IEC 61730 — PV module safety qualification
• IEC 62446 — PV system documentation, commissioning, inspection
• EN 50549 — Requirements for generating plants to be connected in parallel with distribution networks
• EU Renewable Energy Directive (RED III) — target framework context only
This block is informational; it does not certify any specific product or installation. Final conformity assessment must be issued by a notified body for the EU/EEA market of installation.

8. HS code block (duty rates marked PENDING)

HS code (EU CN)	Description (illustrative)	EU MFN duty	Notes
8541.43.00	Photovoltaic cells assembled in modules or made up into panels	PENDING	Lookup at TARIC: https://ec.europa.eu/taxation_customs/dds2/taric/
8504.40.84	Static converters — solar inverters	PENDING	Lookup at TARIC: https://ec.europa.eu/taxation_customs/dds2/taric/
7610.90.90	Aluminium mounting structures for PV	PENDING	Lookup at TARIC: https://ec.europa.eu/taxation_customs/dds2/taric/

Duty-rate disclaimer. All duty rates in this block are marked PENDING. The exact applicable rate depends on the precise CN subheading, origin country, anti-dumping or countervailing measures in force, and any preferential treatment (GSP, FTA, EU-Vietnam, etc.). Verify the live rate in the European Commission's TARIC database (ec.europa.eu/taxation_customs/dds2/taric/) before quoting or importing. Tradvolt does not assert any duty rate as fact in this document.

9. Assumptions & limits of this study

Single-currency EUR, no FX hedging modelled.
Flat tariff and feed-in profile over 25 years (real terms); a step-up model is available on request.
No financing cost amortisation table (NPV uses WACC = discount rate).
No carbon-revenue layer (EU-ETS / CBAM exposure of the industrial off-taker excluded).
Capex excludes land lease, grid-connection reinforcement, and permitting fees — these are project-specific and must be added by the EPC.

© Tradvolt — Editorial use-case study. Not financial advice. Not a tender offer. All figures are illustrative and must be re-validated against the binding EPC quotation and the applicable national support scheme at the moment of procurement.