energy_mass_balancecostingsolar

Utility-Scale Solar PV LCOE (Ground-Mounted, 5–200 MWp)

Estimates the levelized cost of electricity (LCOE) for a utility-scale ground-mounted PV plant from capacity, capacity factor, and CAPEX/OPEX per MW.

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I do low-carbon energy stuff for 10 years & build things I wish existed.

Inputs

Pv Mount Type

Used only to select a typical parasitic loss fraction (small) and robust O&M estimation. Capacity factor should already reflect the chosen configuration.

Installed Capacity Mw

Nameplate PV capacity (MWp). For screening, treat this as DC size; capacity factor should correspond to expected AC net output.

min 5 · max 200 · step 1 · MW

Capacity Factor

Annual average net capacity factor (after typical losses and availability). Use site/resource and design expectations.

min 8 · max 35 · step 1 · %

Discount Rate

Real discount rate / WACC used for LCOE discounting.

min 0.02 · max 0.15 · step 0.005 · ratio

Lifetime Years

Economic lifetime used for discounting and degradation. Typical PV lifetimes are 25–35 years.

Results

Net annual electricity generation (Year 1)

Based on installed capacity, capacity factor, and parasitic loss assumption

…MWh/year

Total installed CAPEX

Scaled specific CAPEX times installed capacity

…EUR

Annual fixed O&M cost

Estimated as a robust fraction of CAPEX, with scale effect and technology type

…EUR/year

LCOE (discounted PV method)

PV(costs) divided by PV(energy)

…EUR/MWh

LCOE (simple CRF annualization)

Equivalent annual cost divided by Year-1 net energy (screening shortcut)

…EUR/MWh

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About

Calculator context

Introduction

This calculator estimates the Levelized Cost of Energy (LCOE) for utility-scale, ground-mounted photovoltaic (PV) projects in the screening phase, consistent with typical developer workflows for 5–200 MWp fixed-tilt or 1-axis tracking plants. It uses a discounted-cash-flow LCOE approach aligned with common practice in IRENA cost reports, NREL ATB, and PV performance conventions in IEA-PVPS and Fraunhofer ISE summaries.

Methodology

The model converts nameplate capacity and capacity factor into annual energy, applies small parasitic loss assumptions, then computes LCOE from the ratio of discounted lifetime costs to discounted lifetime energy.

Key steps and formulas (variables shown with units):

Annual full-load hours (mandatory energy node):
- load_hours = hours_per_year * capacity_factor
- hours_per_year = 8760 h/yr; capacity_factor in [0–1]
Availability/CF penalty scaffold (mandatory node, neutral by default):
- load_penalty = clamp(1 + penalty_coeff*(1 - capacity_factor), 1, max_penalty)
Parasitic consumption / loss scaffold (mandatory node):
- effective_consumption = specific_consumption * load_penalty
- annual_net_generation_mwh = installed_capacity_mw * load_hours * (1 - effective_consumption)
Costing:
- CRF (mandatory): CRF = (r*(1+r)^n)/((1+r)^n - 1)
- capex_total = installed_capacity_mw * specific_capex_scaled
- O&M is entered as a fixed EUR/MW/year, converted to an implied fraction and clamped.
Discounted lifetime PV (present value) for LCOE:
- PV_cost = capex_total + PV(O&M)
- PV_energy includes annual degradation: q = (1 - degradation_rate)/(1 + r), PV_energy = (E1/(1+r)) * (1 - q^n)/(1 - q)
- LCOE = PV_cost / PV_energy

Applications

Developer BD / origination: compare LCOE sensitivity to site CF and EPC pricing when screening land/connection options.
IPP investment committee: benchmark a project’s implied LCOE against PPA price targets using consistent discounting and degradation.
EPC / engineering team: test how tracking vs fixed-tilt parasitic assumptions affect net export and LCOE ranges without detailed simulations.

Assumptions

22 assumptions used in the calculations

Prevents division-by-zero and undefined CRF denominators in edge cases.
Market range Not applicable (numerical).
0.000001
Numerical stability constant for division guards in the DSL.
Used to convert capacity factor to full-load hours.
Market range Fixed physical constant.
8760h/year
Calendar-year hours.
Avoids inline magic numbers in DSL expressions.
Market range Not applicable.
0
Arithmetic constant.
Avoids inline magic numbers in DSL expressions and clamp bounds.
Market range Not applicable.
1
Arithmetic constant.
Numeric encoding for fixed-tilt option in the technology selector pattern.
Market range Not applicable.
1
UI selector encoding.
Numeric encoding for 1-axis tracking option in the technology selector pattern.
Market range Not applicable.
2
UI selector encoding.
Represents transformer/auxiliary loads and minor station service as a small fraction of gross generation for fixed-tilt plants.
Market range
0.007
Typical PV parasitic/auxiliary consumption and net export losses (screening).
Tracking systems can have slightly higher auxiliary consumption (drives/controls) and O&M-related downtime; modeled only as a small parasitic fraction.
Market range
0.01
Typical PV parasitic/auxiliary consumption and net export losses (screening).
Set to zero so the mandatory penalty node does not distort user-provided capacity factor at screening stage.
Market range
0
CATEGORY_RULES scaffold parameter.
With penalty_coeff = 0, max_penalty = 1 ensures load_penalty remains neutral at 1.
Market range
1
CATEGORY_RULES scaffold parameter.
Used to reduce annual energy over time in the discounted lifetime energy calculation.
Market range
0.0051/year
PV module/system degradation typical range in technology scaffold.
Provides a stable normalization capacity for optional economies-of-scale expressions.
Market range
50MW
Scaling reference point for clamp/scaling scaffolds.
Introduces a negative exponent for CAPEX per MW to reflect economies of scale.
Market range
-0.15
Empirical scale effect for utility PV.
Prevents non-physical negative/near-zero CAPEX from propagating through cost calculations.
Market range
300000EUR/MW
Input clamp bound (broad sanity range).
Avoids extreme CAPEX values dominating outputs due to data entry errors.
Market range
1500000EUR/MW
Input clamp bound (broad sanity range).
Avoids unrealistically low O&M when users enter near-zero O&M values inadvertently.
Market range
0.005
Sanity clamp for annual fixed O&M as fraction of CAPEX.
Avoids unrealistically high O&M fractions due to unit mistakes (e.g., entering EUR/kW-year as EUR/MW-year).
Market range
0.03
Sanity clamp for annual fixed O&M as fraction of CAPEX.
Reference CAPEX per MW for scale effect calculation.
Market range
800000EUR/MW
Empirical market data for utility PV.
Robust O&M fraction for fixed-tilt utility PV, with scale effect.
Market range
0.012
Empirical market data for utility PV O&M.
Robust O&M fraction for tracking utility PV, with scale effect.
Market range
0.014
Empirical market data for utility PV O&M.
Scale effect for O&M fraction (fixed-tilt).
Market range -0.09 to -0.07 typical.
-0.08
Empirical market data for utility PV O&M.
Scale effect for O&M fraction (tracking).
Market range -0.09 to -0.07 typical.
-0.08
Empirical market data for utility PV O&M.