I'm on OS. Gizzu powers ONT and 2 routers. Not had any down time during loadshedding.In most cases Openserve does have backup batteries.
You can try to power the ONT and router with a battery to see if they work. Most ONTs and routers are 12v input so you can double check the power requirements and power them on during the next loadshedding slot to see if it works.


