Inverter Guide: 7 Tips To Choose The Right Inverter
In this guide we will explain how to size a solar inverter, define key terms like the DC-to-AC ratio and clipping, compare inverter types, and provide practical tips for choosing
Solar inverters are typically rated in kilowatts (kW), which measures their capacity to handle power. To size an inverter correctly, you need to consider: The Total Capacity of Your Solar Panels The combined wattage of your solar panels (e.g., a 6 kW solar array) is the starting point. Your inverter size should align closely with this value.
Knowing the power consumption of each device is the first step in determining the appropriate inverter size. The wattage of each device can typically be found on its label or user manual. The formula to calculate wattage is: Wattage (W) = Voltage (V) × Amperage (A) For example, a refrigerator may use 200W, while a fan might consume 70W.
Calculate the total wattage by adding up the running watts of all appliances. Take into consideration the surge requirements of appliances with electric motors. Choose an inverter size that's at least 20% larger than the total calculated wattage. Identify the largest power draws in your RV to accurately size the inverter for your specific needs.
Choose an inverter that has a surge watt rating equal to or greater than this value. As for voltage drop, check the wire length between your solar panels and the batteries. If the wire length is long, you may need to choose a lower voltage system (12V, 24V, or 48V) to minimize voltage drop.
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