Solar Panels for a Small Home Using 20 kWh/Day
A small home using 20 kWh per day with 350W panels and 5 sun hours needs approximately 14 panels.
How to use this tool
- Find your daily kWh use on your electricity bill and enter it.
- Enter the wattage of the solar panels you plan to use.
- Enter peak sun hours for your location (find these on solar resource maps).
- Set system efficiency at 80% as a conservative starting estimate.
Find out how many 350-watt solar panels a smaller household needs to offset its daily power use.
Frequently asked questions
- How many solar panels do I need?
- Divide your daily kWh consumption by the energy produced per panel per day (panel kW × peak sun hours × efficiency). Round up to the nearest whole panel.
- How many peak sun hours does my location get?
- The US averages 4–6 peak sun hours per day. Arizona and Nevada can exceed 6.5. The Pacific Northwest and Northeast average 3.5–4.5 hours.