Guide
Preparing for a planned outage
Charge phones, power banks, and laptops the night before. If you're on a water pump connected to the grid, fill a backup container — pumps don't run without power even if your building has water pressure normally. Put fridge and freezer doors on a 'minimum opens' rule; a full freezer stays cold for around 24 hours unopened, a half-full one for less. If you work from home, a mobile hotspot is worth having since most home broadband routers also lose power. For medical equipment (oxygen concentrators, CPAP, dialysis-adjacent devices), plan around the outage window in advance rather than reacting to it.
A practical checklist by household type
Apartment or flat
The two things that fail first in an apartment are water and lifts. Most buildings pump water with a grid-powered motor, so fill kitchen and bathroom storage the night before rather than the morning of the cut, when everyone else in the block has the same idea and the sump runs low. If your building has a generator, confirm whether it powers the lift and common lights only, or also individual flats — many Tamil Nadu associations restrict it to common areas to save diesel.
Independent house
Check the inverter battery water level and terminals the week before, not the morning of. A battery that has not been topped up in six months will show full charge and still collapse after forty minutes of load. If you run a borewell motor, pump into the overhead tank the previous evening.
Working from home
Fibre broadband dies with the ONT, not with your laptop, so a charged laptop alone will not keep you online. Either put the router and ONT on a small UPS, or plan to tether from mobile data. Check your mobile signal indoors in advance; some towers run on their own backup for only a few hours during long area-wide outages.
Elderly family members and medical equipment
If anyone at home depends on an oxygen concentrator, nebuliser or refrigerated medication, treat a planned cut as something to prepare for seriously. Insulin keeps for several hours in a closed fridge that is not opened, and longer in a cool bag with an ice pack. For powered medical devices, arrange backup before the day.
The hour before and the hour after
Unplug air conditioners, televisions, computers and the fridge a few minutes before the stated start time. The genuine risk is not the cut itself but the surge at restoration, when the feeder re-energises and voltage swings for a few seconds. Wait five to ten minutes after power returns before switching heavy appliances back on, and switch them on one at a time rather than all together.