Quick Answer
To size solar for a tiny home with electric heating, determine the total daily energy required, accounting for heating, lighting, appliances, and charging electrical devices. Calculate the required solar panel wattage based on the total daily energy and available sunlight hours. Consider adding a battery bank for energy storage.
Calculating Daily Energy Requirements
To size solar correctly, you must calculate the total daily energy required by your tiny home. Start by adding the wattage of all electrical devices, including heating systems, lighting, appliances, and charging ports. Consider an average daily usage: 2-3 kW for a small home with a moderate heating system, assuming 8 hours of sunlight per day. Convert this to Wh (watt-hours) by multiplying by 8.
Choosing the Right Solar Panel Wattage
When selecting solar panels, consider your total daily energy requirement and the available sunlight hours in your area. For a moderate climate with 5 peak sun hours (PSH) per day, use a 1-1.3 kW solar panel system for a small home with electric heating. To account for variable sunlight, add 10-20% to the total wattage. For example, a 1.1 kW system would require 1.2-1.3 kW of solar panel wattage.
Adding Energy Storage with a Battery Bank
To ensure a consistent energy supply during periods of low sunlight, consider adding a battery bank to your solar system. For a tiny home, a 24-48V, 10-20 kWh battery bank can provide 1-2 days of backup power. Size the battery bank according to your daily energy requirements and available solar panel wattage. This will help you maintain a reliable energy supply and prevent frequent charging cycles.
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