solar calculator — enter your ZIP code and electricity bill, and it returns your recommended system size in kW, the number of panels, the roof area you need, the gross install cost, the annual savings, the payback period, the 25-year lifetime profit, and the CO₂.
This article provides a practical, reproducible estimation workflow—from scoping the PV glass in your project through material pricing, labour rates, electrical BOS, code compliance fees, lifecycle costs, and procurement strategy—so your next estimate captures the full.
solar calculator — enter your ZIP code and electricity bill, and it returns your recommended system size in kW, the number of panels, the roof area you need, the gross install cost, the annual savings, the payback period, the 25-year lifetime profit, and the CO₂.
This tool calculates levelized cost of energy (LCOE) for photovoltaic (PV) systems based on cost, performance, and reliability inputs for a baseline and a proposed technology.
The basic formula to estimate solar output is: Daily Energy (kWh/day) = Panel Wattage × Number of Panels × Sun Hours × Efficiency ÷ 1000 This calculator automates that process and gives you daily, monthly, and yearly energy estimates.