zanydroid
Solar Wizard
Also, per UL1741 SA, the inverter HAS TO stay on-grid between 88-120% (or 105.6-144v for 120v). A UPS can have a tighter range.
Maybe there is a way to set override the inverter grid profile to have less aggressive ride through. Ride through is anyway only needed for grid support inverters. The application in question is decidedly not supporting grid
How long does it take to disconnect the relay is the question. During that time, the grid will sink the power, and for all practical purposes, 0v will be received by your load.
If the grid is on its way out, doesn't it drop below 88% and therefore eligible to disconnect?
I don't think it goes down to zero in a step function either. Depends a lot on the ambient conditions. For instance, if a line goes down during the day on a branch with a lot of grid tie inverters those inverters might slow down the voltage drop. At night in most situations if distribution line goes down it will likely plummet pretty fast unless there are enough folks on the branch running storage inverters that are prewarmed to catch the drop quickly.
Last edited: