For a four-person household planning around a 72-hour outage: a single Anker SOLIX F3800 handles fridge, lights, devices, and a CPAP for two nights without solar input. Add a 400W panel and the runtime goes open-ended. Below: how to size, sequence, and ration through a real grid-out without buying twice as much capacity as you’ll use.
What 96 hours actually looks like
Hurricane Helene’s outages lasted a median of 4 days for affected households along the Carolinas–Tennessee corridor (NOAA / utility post-event reports, 2025). Hurricane Idalia: 2–3 days median. The 5th-percentile worst-case was over a week — but those are rare. Plan for 4 days. That’s the design point.
The hardest hours are not the first 24 — those are exciting and adrenaline-fueled. The hardest are 48–72: the fridge is starting to complain, devices are draining, and the generator at the neighbor’s house is keeping you awake.
The median customer in affected counties saw 4.1 days of outage. The median household had no plan beyond a flashlight.
The pick
The Anker SOLIX F3800 is the sane middle-ground answer for a household of four planning a real grid-out. 3,840 Wh of LFP cells, 6,000W of 120V/240V output, NEMA 14-50 outlet for direct EV charging, and a real-world recharge time around 90 minutes from empty. It accepts 2,400W of solar input — that’s 6 panels’ worth of charge per hour in good sun.
Anker SOLIX F3800 — Whole-Home Backup
It’s not cheap. But neither is replacing $400 of fridge contents and a kid’s medication that needs refrigeration.
The 96-hour playbook
Here’s the sequence that survives the median outage. Times are post-outage.
Hour 0–4: triage
The instant power drops, do these in order:
- Plug the fridge into the power station. Don’t open it for the next four hours.
- Charge phones to 100%. They become your weather radio, communications hub, and morale.
- Hard-shut the chest freezer if you have one. A full chest freezer holds 48 hours sealed; you don’t need to power it yet.
- Fill bathtubs and any spare containers with water. Municipal water often follows power.
Hour 4–24: stabilize
You’re in this for at least a day. Establish the rhythm:
- Fridge stays plugged in but on its own circuit. Don’t piggyback the kettle on this outlet.
- One light per occupied room — battery lanterns, not the power station.
- CPAP only at night.
- Phones charge once per 24 hours, not continuously.
Hour 24–48: extend
By now you’ve burned through maybe 60% of a 3.8 kWh battery. Time to think about recharge:
- Solar: deploy 200–400W of panels in the sunniest spot. Realistic gain: 1.5 kWh per sunny day.
- Generator: run for 60 minutes, charge the battery, kill the generator. You’re using the battery as a buffer to avoid running a noisy generator overnight.
- Vehicle: a 12V car-to-station inverter cable adds 200W per hour your engine runs. Not great math, but it works.
Hour 48–96: sustain
This is where most plans fail. You’ve fallen into a groove and gotten complacent. The freezer is starting to get warm. The CPAP nights have eaten into your reserve. The kids are bored.
- Move freezer contents to the fridge if both are starting to warm. Triage what to eat first.
- Cook the most expensive meat now, even if you’re not hungry. A grill outside, charcoal you bought before the storm.
- Keep the news on — but only once an hour, for ten minutes. Information density per watt is high; constant streaming is a battery killer.
The numbers
Typical four-person essentials load, day-by-day:
| Load | Watts | Hours/day | Wh/day | Total Wh |
|---|---|---|---|---|
| Fridge (cycling) | 60 | 8 | 480 | 1,920 |
| LED lights (3) | 30 | 5 | 150 | 600 |
| CPAP | 45 | 8 | 360 | 1,080 |
| Phone × 4 | 25 | 2 | 50 | 200 |
| Wi-Fi router | 12 | 24 | 288 | 1,152 |
| ★ Total daily | — | — | 1,328 | 5,310 |
A 3.8 kWh battery with no solar barely makes 48 hours under this load. With 400W of panels deployed for 4 hours of usable sun a day, runtime stretches past a week.
What we’d change
Three lessons from the post-event reports:
- A single power station alone is borderline. A second unit dedicated to charging while the first runs the house doubles your effective buffer for surprisingly little money.
- Pre-cool the fridge to 32°F (1°C) the night before a forecasted storm. Pulls thermal mass into your favor for the first 12 hours.
- Buy 600W of solar, not 200W. The marginal cost is small; the payoff under cloudy skies (which is when storms happen) is huge.
The mistake people keep making
Treating the power station as an emergency tool you only buy after the outage. Buy it months before. Use it for camping, tailgates, garage projects. By the time the storm warning hits, you’ll know exactly how it behaves, what it can carry, and how to recharge it.
A power station you’ve never used is just a heavy expensive box when the wind picks up.
FAQ
How long does a 3.8 kWh power station actually last in a real outage? +
Should I buy a generator instead? +
Can I run a 5-ton AC off a portable unit? +
What about CPAP? +
Affiliate disclosure
WattBunker may earn a commission when you buy through links on this page, at no extra cost to you. Our recommendations are based on manufacturer datasheets, Amazon listing data, verified-buyer reviews, and third-party reviews when available — not on manufacturer payments. See How we work for details.
Imagery & AI
Hero images, lifestyle shots, and many illustrations on this article may be generated or edited with AI. They illustrate the topic and are not photographs of testing we performed. Product photos, when present, come from manufacturer press kits. See How we work for the full breakdown.