Load-shedding is not rare here. It happens every day. A battery that looks fine on paper can still wear out early if it charges hard in the afternoon and runs through a hot night, week after week.
That is why we use LiFePo4. It stays stable in the heat a Pakistani room actually reaches, and it keeps a useful charge after thousands of cycles. That is what a home or shop needs when the outage is normal, not a surprise.
Wall, stack, and rack packs in the Famlink range all use this cell type. The size changes with the room. The job does not: keep lights, fans, wifi, and a fridge running until WAPDA comes back, then take a charge without trouble.
If this is your first system, start with the loads you refuse to lose — not the biggest pack on the list. A city desk can sit with you, look at the evening load, and match a wall unit or a stack to that list.