Home / Solar Sizer

Turn a list of appliances into panel, battery, inverter and charge-controller estimates.

Coming to iPhone & Android

What it does

• Load list: watts and hours per day for each appliance
• Daily energy in watt-hours
• Suggested PV array size from your peak sun hours
• Battery bank size and amp-hours, with lead-acid or LiFePO4 depth-of-discharge starting points
• Inverter continuous rating and charge-controller current (NEC 125% factor)
• Save systems, export a JSON backup or CSV, import, or reset

Results are planning estimates only, not engineering or electrical advice. Have a licensed electrician review any installation.

• No ads
• No tracking
• Data stays on your phone
• Works offline
• All ages