Backup power gets expensive when every device becomes “critical.”
The useful question is narrower: what needs power in the first hour, the first night, and the first full day?
Tier 1: health and safety
Put these first:
- medical devices and refrigerated medicines
- phones and emergency communication
- carbon monoxide and smoke alarms
- safe lighting
- heat or cooling needed for health
- sump pump or other water-control equipment
If a medical device depends on electricity, build a plan with the device provider or medical professional. Do not improvise that plan during the outage.
Tier 2: food and basic function
The refrigerator, freezer, modem, router, a few lights, and phone charging often define a modest backup plan. This is the range where a portable power station may be enough for short outages if the runtime math works.
For food safety timing, Ready.gov and CDC both emphasize keeping refrigerator and freezer doors closed and using thermometers rather than guessing.
Tier 3: comfort
Comfort loads matter, but they should be named honestly:
- fans
- TV
- laptops
- coffee setup
- microwave
- small induction cooktop
If coffee is a non-negotiable morning ritual, Coffee Mastery can help you choose lower-drama brew methods. From an energy standpoint, a kettle and grinder are short, high-power loads rather than all-day loads.
Tier 4: large loads
Most backup plans get complicated here:
- central air conditioning
- heat pump systems
- electric water heater
- electric range
- dryer
- Level 2 EV charging
These may require a home battery, generator transfer equipment, load shedding, or a whole-home design. They are not casual extension-cord loads.
Decision section
Before buying, fill this out:
| Load | Must run? | Watts | Hours | Notes |
|---|---|---|---|---|
| Refrigerator | Yes | estimate or measure | outage hours | Keep doors closed |
| Router | Maybe | measure | work/communication hours | Consider phone hotspot backup |
| Medical device | Yes if applicable | from label/provider | required | Plan with clinician/provider |
| Heat/cooling | Depends | system-specific | safety window | Professional planning likely |
Then read Battery Runtime Calculator to turn this into runtime.
