System setup
Configure your location, solar system and household consumption
📍 Location & solar PV system
🏠 Household consumption
📈 Solar generation preview
Solar generation (kWh)
Household usage (kWh)
Assumptions: Solar modelled using location-specific GHI data × system efficiency × orientation factor. Daytime load = 40% of daily usage; night = 60%. Battery usable capacity = 90%. EV efficiency ~6 km/kWh. Validation tolerances: ±10% = Accurate, ±20% = Optimistic, >20% = Unrealistic. Australian free power window: 11 am–2 pm modelled as 3 hrs = 30% of daytime loads and ~45% of daily solar falling in the window; grid supplied free up to 24 kWh/day cap; smart strategy charges battery from free grid where selected. Retail rate assumed $0.30/kWh for savings estimates. This tool is for indicative planning only — consult a certified installer for a formal proposal.
EV charging
Configure electric vehicle demand and charging patterns
🚗 EV configuration
EV demand summary
EV demand (kWh/day)
Household demand (kWh/day)
Results & charts
Annual energy flow simulation with recommended battery
Monthly energy flows (daily average kWh)
Solar generation
Direct solar use
Battery discharge
Paid grid import
Self-sufficiency & battery utilisation by month (%)
Self-sufficiency %
Self-consumption %
Battery utilisation %
Seasonal performance summary
Battery simulator
Test any battery size and see real performance impacts
🔋 Custom battery size
Recommended vs custom battery — self-sufficiency comparison
Recommended self-suff
Custom self-suff
Recommended util
Custom util
Custom battery state of charge across the year
Installer proposal checker
Enter installer quotes to validate their claims against modelled reality