Estimate the string sizing for the Xantrex Charge Controller

I noticed that Xantrex has not yet published the string sizing tool for the Xantrex XW MPPT 80-600. What's a good way to estimate string size for this new inverter?

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This data sheet (pdf) would be helpful.

As long as your PV array is within the below specified limits, you are good for off-grid systems.

4800 W max. for 48 V systems (2 strings)
2560 W max. for 24 V systems (1 string)

Nominal battery voltage 24 and 48 V (Default is 48 V)
Max. PV array voltage (operating) 195 to 550 V
Max. PV array open circuit voltage 600 V
Max. PV array input current 35 A

The XW MPPT 80-600 is a promising new charge controller from Scheider Electric (Xantrex) which has the unique ability to charge a battery bank with up to 550 VDC instead of the previous industry maximum of 150VDC.

The inverter should be shipping in early July - but there is no string sizing tool published yet by Schneider. How can a designer get some help planning a system prior to the publication of an official string sizing tool?

The official work-around from Shneider is crude, but effective: Use the grid tied GT5.0 (240VAC) string sizing tool and you should have an almost perfect guide to planning the MPPT 80 array (also about 5kW at 4800W). Link Here.

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Submitted

13 years 4 months ago

Asked by

Jeff Ramsay

Topics

Charge Controller

Off-Grid