About the Solar PV System Sizing Calculator Online Free Tool

The Solar PV System Sizing Calculator Online Free Tool estimates PV array size, panel count, battery storage, battery amp-hours, and inverter rating from load and site assumptions.

How to Use the Solar PV System Sizing Calculator Online

1. Enter daily energy demand, peak sun hours, and system efficiency.
2. Set battery autonomy, battery voltage, depth of discharge, panel wattage, and peak load.
3. Run the calculator to review array, storage, and inverter estimates.

Choosing Options Correctly

Use conservative sun-hour and efficiency values for the site. Final PV design should account for shading, orientation, temperature, charge-controller limits, battery chemistry, local code, and manufacturer constraints.

Common Use Cases

• Estimate standalone PV requirements.
• Compare panel counts for different panel wattages.
• Check battery autonomy assumptions for off-grid loads.

Quick FAQ

Does this model seasonal production?
No. It gives a simplified sizing estimate and does not model hourly weather, shade, tilt, azimuth, clipping, or seasonal variation.

Can this replace a solar design package?
No. Final PV design needs site survey, shade analysis, inverter/string design, code checks, racking, and permit documents.

What location data matters?
Peak sun hours, temperature, roof orientation, shading, utility rules, and local weather all affect real output.

Should batteries be sized separately?
Yes. Battery autonomy, depth of discharge, inverter efficiency, surge loads, and backup priorities need their own design checks.