Dan Lennox asked me to post this to the list:
I have been working with Xantrex customer support for the last couple of months, concerning an issue when a XW-6048 inverter is connected to a wind turbine and allows alarmingly high battery voltage.
The inverter Grid Support Volts is set to 55v, and should sell at or around this voltage. However I have seen issues where the inverter is not selling and allows the battery voltage to get alarmingly high (>60v). It would have gone higher (and I have seen 63v) except that my diversion controller kicks in and diverts power, stopping the voltage increase.
This situation occurs typically under low wind conditions and it seemed to take about 15 seconds for the inverter to wake up and load the wind turbine. When the inverter did 'kick in' it put a 60amp load onto the turbine, which caused it to slow down, quickly lowering the battery voltage and the inverter stops selling - causing the whole cycle to happen over again!
I just heard from an Xantrex customer support engineer that the XW inverter software has a built in 20 second delay (de-bouncing time they called it) once the Grid Support Voltage is reached, regardless of how high the voltage may get.
Xantrex has agreed to work on a firmware upgrade that will allow SELL to occur when BATTV=GSV+4V and this should be available in a few weeks.
Dan Lenox
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