Methodology & Data Sources (2026)Calculation Parameters Production formula: System Size (kW) x Sun Hours x 365 x 0.75 (Efficiency Factor)Sun hours: US/Canada: 4.5 hrs; UK/Europe: 2.5 hrs (reflects lower irradiance)Efficiency factor: 0.75 (covers inverter losses, wiring, temperature, soiling)Roof requirement: 75 sq ft/kW (7 m2/kW)System cost: Region-specific $/W installed (US: $2.85/W, CA: $3.10/W, EU: 1.60-1.80/W)Utility inflation: 3.5-5%/yr by regionEV consumption: 0.3 kWh/mile averageCO2 factors: US: 0.92 lbs/kWh, CA: 0.38, UK: 0.21, DE: 0.35, FR: 0.06Incentives & Data Sources US ITC: 30% federal tax credit per Inflation Reduction Act (through 2032)Canada: Greener Homes Grant; provincial net metering; federal carbon taxUK: 0% VAT on solar; Smart Export Guarantee; Boiler Upgrade SchemeGermany: KfW grants (up to 30%); EEG feed-in tariff; EU ETS carbon pricingFrance: MaPrimeRenov'; feed-in tariff; 5.5% VAT for <3 kWc systemsElectricity rates: EIA (US), OEB (CA), OFGEM (UK), BDEW (DE), CRE (FR)Data based on 2026 average utility rates and weather patterns for United States. All data reflects publicly available 2025-2026 averages and may not represent current rates. Solar production estimates use region-specific peak sun hours. Battery cost estimates: US $800/kWh, CA $900/kWh, EU 700/kWh. This tool is for informational purposes only and does not constitute financial advice.
© 2026 SolarEV Planner. For informational purposes only - not financial advice.
Data based on 2026 average utility rates and weather patterns for United States. See methodology.
Estimates only. 2026 Tax Credits and utility rates are subject to local policy changes.