The design of solar panel strings needs to satisfy two conditions simultaneously: The maximum open-circuit voltage of the series-connected photovoltaic modules should be lower than the inverter''s maximum input voltage. The MPPT voltage of the series-connected photovoltaic modules should fall within the inverter''s MPPT voltage range.
Thus, the optimal number of modules per string is 16. Unlock the full potential of your solar power system! By leveraging the rated operating voltage parameters provided by inverter manufacturers, you can effortlessly determine the optimal number of modules per string.
Here are the results we calculated: This inverter has 2 MPPT trackers, so a total of 2 strings can be connected to the inverter. We know that there can only be 13 modules maximum installed. We can have one MPPT with 6 modules in a string and the other at 7 modules in a string. Check out UpTop Solar String Sizing Tool that does this for you!
Before string sizing we will need to check the inverter limits and peak performance ranges. Example inverter data sheet Max. PV Power: be sure that the total number of modules are below the inverter’s maximum. Max. DC Voltage: be sure that the total modules in series are below, in this case, 600 V total.
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