What Should You Run First During a Power Outage? A 24/48/72-Hour Load Plan

A power outage turns “what can I run?” into a decision about health, communication, food, water and shelter. Start with the people in the home and the consequence of losing a device. A large battery is not a plan by itself; it may have the wrong output, startup limit, recharge path or approval for a critical device.

Start with the priority ladder

Use the ladder below as a starting order, then move a load up or down when the person, weather or location makes its consequence different. The table is about what to protect first, not a promise that one portable power station can run every item.

The first hours: safety before comfort

Make the situation safe and visible

Confirm whether the outage affects the whole home or only a circuit, but do not touch a fallen line, wet electrical equipment or standing water near electricity. Note when utility power stopped. Turn off or unplug sensitive electronics; Ready.gov warns that restoration can bring momentary surges or spikes. Keep one phone available for alerts, use the smallest light that works and place the station dry, stable, uncovered and ventilated as its manual requires.

Check on anyone whose medication, mobility, sleep, communication or temperature depends on electricity, including infants, older adults, people with disabilities and pets. For a medical device or refrigerated medicine, use the prearranged professional contact and alternate location. Do not make a first-time connection to a critical device during the outage.

Protect medical needs without guessing

A general-purpose battery is not automatically a medical backup. The exact device may need particular waveform, grounding, transfer, alarms, starting power or runtime. Ask the equipment manufacturer and appropriate clinician, pharmacist or care provider what is approved. Keep instructions and contact numbers with the station. If the approved backup time is running out, arrange a replacement supply, transport or powered shelter rather than stretching a battery percentage.

For a model-specific boundary, the official BLUETTI AC70P manual warns that the unit is not for devices requiring a high-performance UPS, including medical equipment. That is an AC70P statement, not a judgment about every station. The manual for your exact model controls.

The 24/48/72-hour action plan

These are checkpoints for changing the plan, not runtime estimates. At each one, check the remaining energy, actual load, weather, local instructions, water, food, medicine and recharge or shelter options. A 24-hour need in mild weather is not the same as a 24-hour need during a heat wave, freeze, flood or evacuation.

Food has its own timing. FoodSafety.gov and CDC guidance say an unopened refrigerator keeps food safe for up to about four hours, while a full freezer can hold temperature for about 48 hours or a half-full freezer for about 24 hours if the door stays closed. Use an appliance thermometer and the item-specific chart; never taste food to decide whether it is safe. Our refrigerator food-safety guide covers those decisions, while the refrigerator compatibility guide covers the separate startup and runtime question.

Water is not only a pump problem. Ready.gov’s kit guidance recommends one gallon per person per day for several days for drinking and sanitation, plus nonperishable food, a radio, flashlight, batteries, chargers, backup battery and needed medications. Follow any local boil-water or contamination notice. A portable station does not make unsafe water safe unless the exact treatment device and procedure are approved.

Conserve battery without losing the plan

Conservation preserves options. Turn off unused outputs, charge phones in batches, dim screens, use low-power settings and reserve a phone for alerts. Prefer a small light over a bright room, and use an approved USB-C or DC connection when more efficient. A USB-C connector is not automatically an input, and a cable is not compatible merely because it fits.

Run one high-draw load at a time. Do not start a refrigerator, pump, kettle and heater together, repeatedly restart a compressor after an overload, or open the refrigerator to browse. Set a reserve threshold for communication and medical needs before allowing work or comfort loads. If the station can recharge, compare incoming energy with the load and follow its manual; pass-through is not automatic.

For a recharge path, use the exact approved wall, car, solar or USB-C method. A car must be operated safely outdoors, never in a garage or other enclosed place. Solar output changes with shade, weather, angle and input limits. If the station will not charge, use the safe charging diagnostic guide or the charging-method guide instead of an unapproved adapter.

Use watts, watt-hours and startup surge

Keep the math short. Watts (W) are the rate of demand at a moment, so they test the station’s ports and inverter. Watt-hours (Wh) are energy over time: average watts multiplied by hours gives a first estimate of energy needed. Startup surge is a brief higher demand from a compressor, pump or motor; it can stop an appliance from starting even when the battery has plenty of energy.

Record the exact load’s label or measured average watts, target hours, simultaneous loads and any observed startup demand. Compare those numbers with the exact station’s continuous output, surge specification and documented usable capacity. Nominal Wh is not automatically usable AC Wh because idle draw, conversion losses, temperature, battery age, reserve settings and load changes matter. The existing essential-load planning guide has the full worksheet, while the measurement guide and runtime calculator cover appliance-specific evidence. This page is about deciding the order, not duplicating those workflows.

As one model-specific example, the BLUETTI AC70P manual lists an 864 Wh battery and 1,000 W maximum AC output, warns that motors or compressors can start at two to four times rated power, and identifies overload, temperature and fan warnings. It says operation time varies with load, depth of discharge, inverter efficiency, self-consumption, temperature and excessive loads, and its AC output must not connect to the grid. These findings are not universal.

Battery station versus fuel generator

A portable battery can power selected approved devices directly from its AC, USB or DC outputs without combustion. Keep it dry and ventilated, clear of heat and water, and follow the manual for cords, power strips, pass-through and output modes. Never plug its output into a wall outlet, breaker panel, transfer equipment or homemade inlet. That can backfeed and energize building wiring, endangering utility workers, neighbors and anyone repairing the system. Whole-home connections are a separate project requiring listed equipment, local compliance and qualified electrical work.

A fuel generator is not an indoor battery substitute. Ready.gov, CDC and CPSC say never operate a portable generator inside a home, garage, basement, crawlspace, shed or other enclosed or partially enclosed place, even with doors or windows open. Operate it outdoors at least 20 feet from the home and away from windows, doors and vents, direct exhaust away from openings, keep it dry as the manufacturer directs and use working battery or battery-backup CO alarms. A porch, carport or apartment balcony is not automatically safe. Do not use a gas range, oven, charcoal grill or camp stove to heat or power an indoor space.

Generator-to-home wiring also must not be improvised. If direct-connected equipment cannot cover the need, arrange professional work or use a powered location. For a smaller home or apartment, the apartment backup guide explains why direct device power is different from building wiring.

When the order changes

No ladder outranks a person’s immediate risk. During dangerous heat, a fan may become a health priority, but CDC advises seeking an air-conditioned shelter because a fan alone may not prevent heat illness. During dangerous cold, safe shelter and an appropriate heating plan can outrank networking or refrigeration. Never use a gas range or oven to heat the home.

A refrigerator may move up for a medicine that requires refrigeration, but that plan belongs with the pharmacist, clinician or manufacturer. A well or sump pump may move up when powered water matters, but standing water and downed lines make electrical work hazardous. Security and access equipment may be critical for mobility or communication needs. In an apartment, lease, building and shared-system rules may rule out a recharge or cord route. Local alerts and evacuation instructions always matter.

Stop and escalate triggers

Stop using or charging a battery for swelling, leaking, smoke, sparks, hissing, a chemical or burning odor, unusual heat, water exposure, a cracked enclosure, melted plastic or visible damage. Disconnect a load when the station repeatedly overloads, shuts down, shows a temperature or fault warning, or the connected device behaves abnormally. Do not open the case, repair lithium cells, bypass protection, keep retrying a failed startup or carry a hot or smoking unit unnecessarily. Follow the safe reset checklist and error-code guide for non-emergency symptoms, then use the exact manual and manufacturer support. Leave and call emergency services for fire, smoke or immediate danger.

Escalate immediately for a CO alarm or symptoms such as headache, dizziness, weakness, nausea, confusion or chest pain: leave the area and call emergency services or the appropriate poison-control resource. Seek a powered shelter or local emergency help when heat, cold, water, medication, medical equipment, food or security cannot be managed safely. When utility power returns, keep sensitive equipment off or disconnected until restoration is stable, then reconnect the smallest priority group first and watch for alerts, heat or abnormal behavior.

Source-update note: Checked October 27, 2026 against the official outage, emergency-kit, food-safety, medication, water and CO guidance listed below and the exact BLUETTI AC70P manual. Emergency recommendations, local conditions, recalls, product limits and manuals can change; confirm the current guidance and your exact equipment before relying on this plan.