Quick Answer
A compact solar array for a tiny home typically needs 4-6 peak sun hours (PSH) of sunlight daily to meet the energy demands of the home. This translates to 2-3 kilowatt-hours (kWh) of energy per day, assuming a moderate energy usage pattern. The exact amount of sunlight required will depend on various factors, including the home's energy efficiency, insulation, and appliances.
Assessing Energy Demands
To determine the required solar array size, you’ll need to calculate your tiny home’s energy demands. Start by identifying your energy usage patterns, including the appliances, lighting, and electronics you plan to use. Consider a moderate usage pattern with an average of 100-200 watts of load per hour. For a 1 kWh battery bank, you’ll need to generate around 2-3 kWh of energy per day. This translates to a 500-750 watt solar array, assuming a 1-2 hour charging window.
Understanding Peak Sun Hours
Peak sun hours (PSH) measure the amount of sunlight available during the day. One PSH is equivalent to 1 hour of direct sunlight with an irradiance of 1,000 watts per square meter. In most regions, you can expect 4-6 PSH per day, depending on the latitude and time of year. To calculate your PSH, use online tools or consult with a solar expert.
Sizing Your Solar Array
When sizing your solar array, consider a 25% safety margin to account for cloudy days, high temperatures, and other factors. This means you’ll want to oversize your array by 25% to ensure you meet your energy demands. For example, a 750 watt array would need to be sized to 937.5 watts to account for the safety margin.
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