Jeff- The Sunny Boys can be reprogrammed into "off grid" mode so they
can work between 56-64 Hz, but I believe you need both a service cable
and a call to SMA tech support to make that happen. They then note in
their system that that inverter's been adjusted to no longer meet UL 1741.
Jeff Yag
Jeff - We have a number of systems with exactly that configuration and we
haven't had any issues. However, we have not installed the XW/SB
combination since Xantrex (Schneider?) rolled out the firmware that
incorporates the high battery frequency shift to shut down the solar
inverter(s). We switc
As mentioned before, many of our clients want battery backup with their solar,
but are not off-grid. They also want a generator so battery banks can be
down-sized. For many of these applications we use a SunnyBoy at the array
when the aray is located hundreds of feet from house, and usually a
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