Installing solar modules with wattages higher than microinverter maximum output, leads to more efficient and dependable systems. The following infographic shows the main results of a research that demonstrates this claim, showing that reduced price per watt and an increased return on investment were both achieved when pairing high power modules to an Enphase M215 microinverter.
Big Solar Modules For Small Microinverters RENVU[/caption]
Research shows: Installing modules with wattages higher than microinverter maximum output, results with lower installed cost per watt, and an increased return on investment. In the infographic above, the AC output power is shown at different times of the day, for a system of an Enphase M215 microinverter (with a maximum output of 225W) and three different Solar modules, of 225W, 260W, and 280W. As can be seen, using a module larger than 225W increased output power.
Cost per Watt The price per Watt was calculated for different modules, of 255W to 280W. Two microinverters were compered: - The M215 with 225W output - Another 240W output microinverter The main findings: For both microinverters, price per Watt is lower for a larger module size. Increasing the microinverter size increases the price per watt.
Minimal losses to Inverter Saturation In the above infographic you can see a graph showing the expected output for year 1 for a 260W module and Enphase M215 microinverter system in Denver, CO. Inverter Saturation Hours are the total hours in a year that the 260W panel produced over 225W (Enphase M215 maximum output). As you can see in the chart, the 260W panel rarely (0.5% of the year) reaches the Inverter Saturation Hours by producing more than 225W. This is just the first year! Even less power is delivered to the microinverter when you factor in panel degradation or soiling. Therefore, higher wattage panels should be paired with microinverters to get the most power out of your system!