Installation
Voltage and MPPT Requirements
MPPT operational | Ensure that the PV array used in the system operates within the MPPT operational | ||||
window | window (Table |
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| Table |
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| Voltage |
| Effect of Array Voltage |
| Inverter Mode |
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| < 195 Vdc |
| Operating voltage will be shifted to 195 Vdc; |
| Low power |
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| the array will not be at its maximum power |
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| 195 to 550 Vdc |
| Maximum harvest of solar energy |
| MPPT window |
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| 550 to 600 Vdc |
| Will not allow maximum harvest of solar |
| Power derating |
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| > 600 |
| Will shut down and may cause damage to the |
| Shutdown |
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| inverter; stops selling surplus energy |
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Voltage | The maximum power point voltage of a string connected to the GT Inverter should | ||||
requirements | be a minimum of 195 Vdc. If it is less than 195 Vdc, then the power point is | ||||
| shifted and the PV voltage is regulated to 195 Vdc. |
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| By regulating the operating voltage of the solar modules, the MPPT software | ||||
| maximizes their output energy. |
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| Effects of array voltages outside of the MPPT operational window are shown in | ||||
| Table |
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Maximum PV | The solar array should be sized such that its maximum power output does not | ||||
Power | exceed the limits of the MPPT operational window (195 to 550 Vdc). See | ||||
| “Guidelines for Matching PV Array Size to Xantrex Grid Tie Solar Inverter | ||||
| Input”. |
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Under no conditions should the array voltage exceed 600 VOC (open circuit voltage).
