the "grid-tied" inverter integrates -a charge controller (PWM or MPTT, I believe the latter is a buck converter, but it trades amperage for voltage and vice-ve

the "grid-tied" inverter integrates -a charge controller (PWM or MPTT, I believe the latter is a buck converter, but it trades amperage for voltage and vice-versa to constantly maintain a voltage advantage over the battery) -an AC inverter the charge controller simply needs to have the means to indepedently switch between "grid-tied" and "battery-charging" I believe most grid-tie inverters have to COMPLETELY disengage from the grid in the event of outages by LAW and this is simply because line-repair-staff don't want to get fried trying to repair lines. Lines are either "up" and working or "down" While what the person above mentioned would be technically feasible. (a distributed grid) it's not desirable nor legal under the current way power grids operate. Again, this is no failing of solar etc.