Xantrex Technology GT3.0 owner manual Voltage and Mppt Requirements, 1MPPT Operational Window

Installation

Voltage and MPPT Requirements

MPPT operational	Ensure that the PV array used in the system operates within the MPPT operational
window	window (Table 2-1).
	Table 2-1MPPT Operational Window
	Voltage	Effect of Array Voltage	Inverter Mode
	< 195 Vdc	Operating voltage will be shifted to 195 Vdc;	Low power
		the array will not be at its maximum power
		point
	195 to 550 Vdc	Maximum harvest of solar energy	MPPT window
	550 to 600 Vdc	Will not allow maximum harvest of solar	Power derating
		energy
	> 600	Will shut down and may cause damage to the	Shutdown
		inverter; stops selling surplus energy
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.
	By regulating the operating voltage of the solar modules, the MPPT software
	maximizes their output energy.
	Effects of array voltages outside of the MPPT operational window are shown in
	Table 2-1.
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”.

Under no conditions should the array voltage exceed 600 VOC (open circuit voltage).

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