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How to Calculate the Number of Solar Panels & Batteries Needed to Operate a Solar Refrigerator And Any Appliance in The Home
The Solar Refrigerator Company is paving the way in the industry with the launch of more highly efficient appliances including ESCR450DW 15.9 cu ft solar refrigerator now reduced from $1,875 to $1,250 (limited stock available) and Dometic DMC4101 10 cu ft RV Refrigerator now $1,550.
The company is publishing a guide on how to calculate the requirements needed to power solar appliances. With the guide, it is now easy for customers to accurately determine the number of solar panels and solar batteries required to properly operate a solar refrigerator or solar freezer anywhere in the world.
In order to determine what is needed to power a solar appliance, it is essential to know the average solar hours or peak sun hours of the city or country, where the appliance will be used.
For customers in the United States and Canada, information about peak sun hours can be obtained via http://pvwatts.nrel.gov/. At the top left corner of the website’s homepage, next to “Get Started,” users will find a text field. Here, Americans are expected to enter their zip codes while Canadians should enter their postal codes and click GO. When the page loads, users need to click on “RESULTS,” which will take them to a table of results from January to December. They will see a column showing “Solar Radiation,” which contains the average monthly solar hours for an address spanning the 12 months of the year. If a user plans to run their appliance all year round, they should note the smallest figure of the year. For customers with cabins, for example, that are only used seasonally, record the smallest value in the months of use of the appliance. The number selected will be used as the Average Monthly Solar Hours to be used in the calculations to follow.
People living outside of the US and Canada can discover their location’s sun peak hours by visiting http://solarelectricityhandbook.com/solar-irradiance.html. Customers are expected to select the country and town or city closest to the area where the appliance will be installed on the webpage. Next, they need to choose the direction in which they plan to install the solar panel. If they do not know that information, they use the ‘Facing directly North’ or ‘Facing directly South’ estimates in the third field.
The website will present the Average Solar Insolation Figures for each month of the year. Users need to record a figure that is the smallest figure of the year, and the number recorded will be used as the Average Monthly Solar Hours to be used in the calculations to follow.
After using either of the above websites to determine the Average Monthly Solar Hours, users can proceed to perform the calculations. Calculations for solar refrigerators and solar freezers can be conducted as follows:
(Power Consumption x 1000) Ã· Peak Sun Hours = Solar Panel Size (in Watts)
Most of the product pages on The Solar Refrigerator Company’s website show the Power Consumption of each model. The power consumption figure used in the above equation should be in kWh/day. For example, using the Dometic DMC4101 10 cu ft RV Refrigerator with a power consumption of 0.89 kWh/day and US zip code 90210, the equation can be expressed as follows:
(0.89 x 1000) Ã· 4.14 = 215 watts
To determine the batteries needed to run this appliance, the key figure is the power consumption, which in the case of the Dometic refrigerator is 0.89 kWh/day. The best practice to maintain the longest service life of a solar battery is to avoid discharging more than 50 percent of its capacity.
Hence, calculating for solar batteries for the Dometic RV Refrigerator:
0.89 kWh/day x 1000 = 890Wh per day
890 x 2 = 1780Wh per day. The multiplication by 2 is because 50% of the battery capacity is half 100%. So, the battery capacity requirement is at least 1780Wh. A 12-volt 100Ah battery has a capacity of 12 volts multiplied by 100Ah = 1200Wh.
Thus, 1780Wh/1200Wh = 1.48 or approximately 1.5 lots of 12 volts 100Ah batteries (or 12 volts 150Ah solar batteries). These calculations can be applied to determine the required solar panels and batteries needed to power anything in a home or business.
If you have questions or for further information about this article, please visit the Solar Refrigerator Blog https://solarrefrigerator.com/blogs/news/do-you-have-questions-about-solar-refrigerator-or-solar-power-equipment-products
Solar Refrigerator Company is available for interviews about their products and how they can help families across the country. For further inquiries, please contact Colin Smith by email [email protected] or call 520-200-7330. The company’s office is located at 1846 E Innovation Park Drive, Oro Valley 85755, United States.
Solar Refrigerator Company
1846 E Innovation Park Drive