solar news
solar news

How Solar Energy Works
Solar Hot Water

Solar Energy Advantages
Types of Systems

Solar Panels
Solar Battery Chargers
Types of Systems
Installing Solar
How Panels Work
Solar Power Cost

Solar Passive Floor Plan
Solar Panel Angles
Solar Panel Costing

Solar Insolation Maps
History of the Solar Panel
Solar Ovens
Solar Books

Energy Saving Tips

Solar Calculators
Solar Panel ROI
Solar Angle Calculators
Net Metering
Solar Energy Calculator

Free Solar Ebooks

Contact Us
Terms and Conditions

Find Articles Now!

Solar Insolation Maps

How Sunshine is Measured

Solar energy is measured in units of Solar Insolation. Technically, these insolation units are described as kWh/m2 per day.

By looking at solar insolation maps, you can determine how many hours of usable sunshine you get on a daily basis. This can help with figuring out how much energy your solar panels will make.

And knowing how much energy your panels will make helps in determining the payback time of your solar energy system.

solar insolation map

Click here for a larger view.

With the larger view, you can read off the map the hours of solar insolation for your state. It's important to note here that for solar electric panels (photovoltaics) the air temperature is not as important as the hours of sunshine. In fact, photovoltaics work better at cooler temperatures.

If you're interested in solar payback time, you can also check our solar calculator. This walks you through the process of deciding what size system to get, and how it will work where you live.

Relevant Links:

Solar Insolation Map USA

World Insolation Map

Solar Insolation Values