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Looks like the frequency issue is fixed. Been stable at 60hz since Tuesday. Now I just need to find out how to get my 3 other inverters to load share equally (6848+, 6048, 4548). They are seperate from the Pro and are for the high power 220v loads. It seems their voltages are out of...

As for the frequency issue, tech support emailed me back and had me do another firmware redeploy followed by a factory reset of all settings. So far so good on short tests, will know more later today. One thing I noticed is this XW Pro whines at a higher pitch than the XW6848+ it replaced...

I've used this pack for 3 years so far on the older xw6848+. Expanding the system with 3 more xw's. 64v is 4v/cell. Cutout is 48v, which is 3v/cell. I know it's a little low, but it hardly goes below 55v or 3.4v/cell. It's a grid tie solar setup to get me through 3 hours of on-peak time...

Title says it. I just installed an XW6848 Pro in a solar / backup system. Unit was purchased new in June. When in grid support it works fine, but when it goes to battery backup (invert) the cycles will jump to 70hz. I can hear the change in a fan nearby and the inverter itself, so its not...