How to maximize the use of solar energy throughout the day?

Sizing the Solar Panel Array

When sizing a solar panel array for a tiny home, it’s essential to consider the daily energy needs of the household. A typical tiny home requires between 2-5 kilowatts (kW) of solar power, depending on the size and energy efficiency of the dwelling. To determine the required array size, calculate the daily energy needs based on the average daily energy consumption of the home. For example, if the home consumes 20 kilowatt-hours (kWh) per day, and the solar panel array is expected to meet 70% of this requirement, the required array size would be approximately 14-17 kW.

Angle and Orientation Optimization

The angle and orientation of the solar panel array play a significant role in determining the energy production throughout the day. To maximize energy production, the panels should be tilted at an angle equal to the site’s latitude. For example, if the site is located at 35° latitude, the panels should be tilted at 35°. Additionally, the array should be oriented to face the true south to receive direct sunlight throughout the day. Some studies suggest that a 10-15° deviation from true south can result in a 10-15% reduction in energy production.

Peak Sun Hours and Energy Production

Peak sun hours (PSH) refer to the number of hours during the day when the solar panel array receives direct sunlight. The number of PSH varies depending on the location and time of year. In general, a solar panel array can produce up to 2-3 kWh of energy per hour during peak sun hours. To maximize energy production, it’s essential to design the array to meet the daily energy needs during the peak sun hours. This can be achieved by installing a larger array or using energy storage systems to supplement the energy production during periods of low sunlight.