Hello,
I have a grid-tied battery backup system in UPS mode in the Bahamas.
We regularly see Grid Loss alarms for negative amounts of time (usually -3 to -5 seconds). What does this mean?
Thanks!
Michael
Perhaps attach a screenshot. Thanks
Anyone?
a negative of a negative being a positive, maybe it found another grid? 
More seriously, does sound like a bug somewhere… can you see the outages in the advanced view (AC in or energy meter) - maybe they’re really brief and it’s some kind of rounding error for the start and stop times? Do the notifications on the local GX device have negative times as well?