House Sun Number Solar Panels

This earth day zillow is highlighting a green initiative that helps inform homeowners and buyers about their own solar potential by putting a sun number on more than 84 million homes nationwide.

House sun number solar panels.

However when calculating the total amount of peak sun hours received at any location you don t just consider hours with 1000 w m 2 of solar radiation. An incubator awardee sun number gives a numerical score which represents the solar suitability of a building s rooftop on a scale from 1 to 100 with 100 being the ideal rooftop for solar. One peak sun hour 1000 w m 2 of sunlight. The scores are an easy and intuitive way for consumers to understand their solar potential the higher the sun number score the more ideal a home is for solar.

Assuming you are going to choose standard efficiency solar panels here are the most common sizes for residential solar systems and their kwh production potential to give you an idea of how many panels you would need to run a house. The average solar panel is around 17 6 square feet and produces 265 watts under direct sunlight per day equaling out to 15 watts per square foot. The sun number score developed through sunshot s successful incubator program instantly determines a home s suitability for solar by giving it a score from 1 100. You will need a roof space of about 194 sq ft for a 3kw system.

A 3kw solar system which consists of 12 panels can produce an average of 4 200 kwh per year. Figure out how many panels will fit in your. You will need. Scores can be accessed by entering a valid address in a region where the analysis has been completed.

If a home has a high sun number score it doesn t necessarily mean that the homeowner must install solar panels only that the potential for energy saving exists. The typical homeowner will need 28 34 solar panels to cover 100 of their energy usage dependent on location and roof size. Instead you need to add the total amount of solar irradiance received by the location. You then express that in terms of the equivalent number of hours with 1000 w m 2.

Solar radiation sun number calculates the amount of solar radiation for every square meter of your roof. A 5kw solar system which consists of 20 panels can produce an average of 7 000 kwh per year. Solar panels are rated in kws. If x kws are required to supply y kwhrs yr do you first divide y by the number of hrs yr to get x and then multiply this number by the fractional number of sunlight hours in a 24 hour period.

If 4 hours then the multiply factor should be 6. How to determine size of solar panel needed. Solar panels also increase the value of your home especially the resale value.