Real projects, real numbers

Case Studies — Real C&I and Solar Projects

Anonymized ROI analyses with real HUPX market prices, modeled on actual load profiles — from high-consumption industry to mid-size C&I sites. CAPEX, payback, IRR and scenario comparison.

High-consumption Industry · 24/7

High-consumption industrial facility, 5 MW peak load

Continuous-load 24/7 industrial site with 5 MW peak demand. We modeled three scenarios against actual HUPX market prices: PV only, BESS only, combined PV+BESS. The combined scenario showed the strongest 15-year economics.

  • Load profile: 5 MW peak · 24/7 industrial
  • BESS: 6,3 MWh (5,6 MWh @ 90% DoD)
  • PV: +3,75 MWp (new installation)
  • CAPEX: ~4,5M EUR
~780k EUR
Annual savings
4,9 years
Payback
22,6%
IRR (15 yr)
21,9%
Cost reduction
Scenario comparison (15-year NPV)
PV only
~1,85M EUR
BESS only
~850k EUR
PV + BESS
~3,0M EUR
Interactive: daily power profile per scenario
Pick a scenario and a period to see how the energy flows transform.
Grid → load BESS → load Solar (PV) → load Consumption (load)
Low-load C&I · HUPX market pricing

Low-load C&I site on HUPX market pricing

Small C&I site on HUPX-based market pricing, with an existing 50 kWp PV array and 100 kW MV grid. Adding a 261 kWh / 125 kW BESS for peak shave and grid-export arbitrage. Best scenario combines self-consumption with export during high-price hours.

  • Grid connection: 100 kW MV
  • BESS: 261 kWh (235 kWh @ 90% DoD) · 125 kW PCS
  • PV: 50 kWp (existing)
  • CAPEX: ~65k EUR
  • Round-trip efficiency: 92% · ≥6000 cycles
41,3%
ROI (BESS + Export)
9,6 years
Payback
~5.800 EUR
Annual savings
77 MWh
Annual export
ROI scenario comparison
Self-consumption only
14,5%
BESS + Peak Shave
26,8%
BESS + Export
41,3%

Modeled with HUPX average ~108.5 EUR/MWh and a fixed grid tariff equivalent of ~184 EUR/MWh.

Mid-load Industry · Transformer station

Industrial production site, dedicated transformer station

Mid-load industrial site with a dedicated transformer station. Adding a 522 kWh BESS and a 200 kWp PV array to cut peak demand charges and network fees. Mid-term payback, robust economics.

  • BESS: 522 kWh (Spower II) · 470 kW
  • PV: +200 kWp (new installation)
  • CAPEX: ~155k EUR
  • cos φ: 0,995 (daily average)
~29k EUR
Annual savings
4,6 years
Payback
17,0%
Cost reduction
200 kWp
PV expansion
Cost reduction per scenario
BESS only
0,5%
PV only
14,0%
PV + BESS
17,0%
EV Charging · Hybrid

PV + BESS + EV fast-charging station

Standalone EV charging station with only 150 kW grid connection — we deliver 400 kW dynamic charging beyond the grid limit. 522 kWh Welion BESS buffers PV and grid, enabling multiple Teslas to supercharge simultaneously — without a costly DSO upgrade application.

  • BESS: 522 kWh (2× 261 kWh Spower I) · 250 kW
  • PV: 50 kWp · 50 kW inverter
  • Grid connection: 150 kW
  • Chargers: 4× with dynamic allocation
400 kW
Dynamic charging power
150 kW
Grid connection
~52 min
Sustained @ 400 kW
209 kWh
Usable energy per cycle
Deliverable charging power
Grid only
150 kW
+ PV (50 kWp)
~200 kW
+ BESS (522 kWh)
400 kW (Tesla-capable)

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Note: all case studies are anonymized. Actual customer names are only shared with explicit consent during the sales process.