Sunshine hours per day x solar panel wattage.
How much sun is needed for solar panels.
Peak sunlight hours describe the intensity of sunlight in a specific area.
To calculate how much electricity a solar panel generates you ll need to use the following multiplication.
Solar panels range in size from about 240 watts up to 370 watts per panel.
The amount of energy striking the earth from the sun is about 1 370w m 2 watts per square meter as measured at the top of the atmosphere.
Cloudy weather can certainly affect how much your outdoor solar lights will charge as the cover will not permit as much light through.
You can use this data and the number of sun hours your town city gets to calculate how many solar panels you will need.
On average a fully charged solar light from eight hours of sunlight will run for about 15 hours.
A peak sun hour is typically defined as an hour of sunlight that offers 1 000 watts of photovoltaic power per square meter.
Peak sun hours occur when the sun is highest in the sky.
You would need a bit more than 3 such panels to produce 1 kwh meaning 84 of these panels are needed to produce 28kw of energy during one peak sun hour.
A mid range solar panel is usually about 300 watts so we ll use this in our example.
How many solar panels do you need for 1000 kwh per month.