> since we have battery backup (known as Inverters)
Just to nitpick, I don't believe they are called that. Inverters are devices that convert direct current to alternate current. They don't provide power. They just convert the power supplied by batteries to a usable format.
Just to nitpick :) but I think the reason inverters was mentioned in brackets was to inform that they are commonly (although incorrectly) called inverters in Delhi. The reason being you don't just buy the inverters by themselves you almost always buy along with batteries.
Just to nitpick, I don't believe they are called that. Inverters are devices that convert direct current to alternate current. They don't provide power. They just convert the power supplied by batteries to a usable format.