Quick Answer
To calculate the return on investment (ROI) for micro-inverters, you need to consider the cost of the micro-inverters, the savings from increased energy production, and the payback period. Typically, this involves calculating the total cost of ownership, system efficiency, and overall energy production. You can use a solar calculator or create a spreadsheet to simplify the process.
Understanding Micro-Inverter Costs
Micro-inverter costs vary depending on the brand, model, and system size. On average, you can expect to pay between $600 to $1,200 per micro-inverter, with a typical system requiring 10-20 units. For a 10 kW system, the total micro-inverter cost could range from $6,000 to $24,000.
Calculating System Efficiency
System efficiency is crucial in determining energy production. Micro-inverters offer improved efficiency, particularly in systems with shading or mismatched panels. By using a micro-inverter system, you can expect to increase energy production by 5-10% compared to a traditional string inverter system. This translates to an additional $1,000 to $2,000 in annual energy savings for a 10 kW system.
Creating a Solar Calculator
To simplify the ROI calculation, you can use a solar calculator or create a spreadsheet. Start by entering the total micro-inverter cost, system size, and expected energy production. Then, calculate the annual energy savings and divide it by the total micro-inverter cost. This will give you the payback period in years. For example, if the system produces an additional $2,000 in annual energy savings and the total micro-inverter cost is $12,000, the payback period would be 6 years.
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