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task library
built templatesolar-pv-designwith-tool

Dc Ac Ratio

Calculates the DC/AC ratio (inverter loading ratio) for solar PV systems and estimates annual energy yield accounting for system losses, inverter efficiency, and clipping losses from inverter overloading. Uses a quadratic clipping model to balance higher array utilisation against peak-hour energy curtailment, per IEC 62548 and AS/NZS 5033.

inputs

4 fields

context

4 archetypes

engine

with-tool

outputs

4 scored fields

contract fields

Parameter Map

4 inputs to 4 scored outputs

  • dc_array_capacity_kwp

    float

    Total PV array DC power capacity at STC

    5 to 10000kWp

  • inverter_ac_capacity_kw

    float

    Total inverter AC power capacity (nameplate rating)

    3 to 8000kW

  • annual_psh

    floatfrom archetypehidden in hard

    Annual peak sun hours for the site location

    800 to 2600h

  • system_losses_pct

    float

    Total system losses excluding clipping (soiling, wiring, mismatch, temperature)

    5 to 25%
dc_ac_ratiotol 0.01

DC/AC ratio (Inverter Loading Ratio)

estimated_clipping_loss_pcttol 0.05

Estimated annual clipping loss (%)

annual_energy_yield_kwhtol 0.03

Estimated annual energy yield (kWh)

specific_yield_kwh_per_kwptol 0.03

Specific yield (kWh per kWp installed)

visibility contract

Difficulty Ladder

all_giveneasy

Residential scale, all parameters given, moderate ILR

all fields visible
all_givenmedium

Commercial or utility scale, all parameters given, wider ILR range

all fields visible
partialhard

Peak sun hours hidden, agent must infer from site location context

annual_psh

scenario bands

Archetype Atlas

residential_rooftop

3 contexts

Residential rooftop solar installation

dc_array_capacity_kwp5 to 15
inverter_ac_capacity_kw3 to 12
annual_psh1300 to 1800
system_losses_pct10 to 18

sydney-suburban / brisbane-suburban / adelaide-suburban

commercial_rooftop

3 contexts

Commercial rooftop solar installation in Melbourne/Sydney (BOM avg 1400-1600 PSH)

dc_array_capacity_kwp30 to 200
inverter_ac_capacity_kw25 to 160
annual_psh1400 to 1600
system_losses_pct10 to 18

melbourne-commercial / perth-commercial / sydney-commercial

utility_scale

3 contexts

Utility-scale ground-mounted solar farm in North Queensland (BOM avg 1800-2100 PSH)

dc_array_capacity_kwp500 to 10000
inverter_ac_capacity_kw400 to 8000
annual_psh1800 to 2100
system_losses_pct8 to 16

north-queensland-solar-farm / western-nsw-solar-farm / pilbara-solar-farm

arid_high_irradiance

3 contexts

Solar installation in arid high-irradiance region near Alice Springs/Broken Hill (BOM avg 2200-2500 PSH)

dc_array_capacity_kwp100 to 5000
inverter_ac_capacity_kw80 to 4000
annual_psh2200 to 2500
system_losses_pct8 to 14

alice-springs-solar / broken-hill-solar / longreach-solar

rendered task

Generation Preview

melbourne-commercial-commercial-rooftop-preview

difficulty
hard
visibility
partial
archetype
commercial_rooftop
site context
melbourne-commercial
instruction excerptdc-ac-ratio_calc.py

visible fields

  • dc_array_capacity_kwp30 to 200 kWp
  • inverter_ac_capacity_kw25 to 160 kW
  • system_losses_pct10 to 18 %

withheld schema

annual_pshdc_ac_ratioestimated_clipping_loss_pctannual_energy_yield_kwhspecific_yield_kwh_per_kwp
Commercial rooftop solar installation in Melbourne/Sydney (BOM avg 1400-1600 PSH). melbourne-commercial. Required outputs: dc_ac_ratio, estimated_clipping_loss_pct, annual_energy_yield_kwh, specific_yield_kwh_per_kwp