How many watts does an oxygen concentrator use?

A home stationary concentrator (5L) typically draws 300 to 400 watts continuously; a 10L unit can pull 500 to 600 watts. Portable concentrators on pulse-dose mode draw far less — often under 100 watts. Continuous-flow home units are power-hungry: at 350 watts, a concentrator uses roughly 8,400 watt-hours over 24 hours.

What size battery do I need to run an oxygen concentrator?

For a portable pulse-dose concentrator under 100 watts, a 1,000Wh station runs it for many hours. For a home 5L concentrator at 350 watts, a 2,000Wh station gives you roughly 5 to 6 hours — a bridge through a shorter outage, not a full 24-hour day. For continuous dependency you need a large battery plus solar recharge, or a generator, and you should keep backup oxygen tanks from your supplier.

Does an oxygen concentrator need pure sine wave power?

Yes. Oxygen concentrators use compressor motors and sensitive control electronics that require pure sine wave power. A cheap modified sine wave inverter can cause the unit to error out, run hot, or fail. Only use a power station with a true pure sine wave inverter for an oxygen concentrator.

Can a battery keep my oxygen running through a long outage?

For a home continuous-flow concentrator, not on battery alone — the power draw is too high to cover many days. A battery is one layer of a plan, not the whole plan. Combine a large power station with solar panels to recharge during daylight, keep backup oxygen cylinders from your supplier, and have a plan to relocate if an outage runs long. Battery backup buys you time; it is not a substitute for coordinating with your oxygen provider.

best power station for an oxygen concentrator (2026)

Short answer

For a portable pulse-dose concentrator (under ~100W), the Anker SOLIX C1000 (1,056Wh, pure sine wave) runs it for many hours and recharges fast. For a home 5L concentrator (~350W), step up to the EcoFlow Delta 2 Max (2,048Wh) — it bridges roughly 5-6 hours, longer with a solar panel. For continuous oxygen dependency, the EcoFlow Delta Pro 3 (4,096Wh) with solar is the real answer. Whatever you buy, it must be pure sine wave, and it does not replace backup tanks from your oxygen supplier.

Oxygen is not like a phone or a fridge. If you or someone in your home depends on a concentrator, a power outage is not an inconvenience — it is an emergency with a clock on it. This page is about buying the right backup, and being honest about what a battery can and cannot do for a life-support device.

I'll give you the real runtime math, the specs that actually matter, and — the part most product roundups skip — where battery backup stops and your oxygen supplier's plan has to take over.

the honest part, first

Most "best power station for oxygen" articles bury this, so I'll lead with it. A home continuous-flow concentrator is power-hungry. At 350 watts running 24 hours, it needs about 8,400 watt-hours a day. No single portable battery covers that for long. What a power station buys you is a bridge — hours, not days — to get through a shorter outage, keep going overnight, or hold you over until you switch to backup tanks or relocate.

So treat battery backup as one layer of a plan, not the plan:

Keep backup oxygen cylinders from your supplier, and know how long they last at your flow rate. This is your true fallback.
Add solar if you can. A large station plus panels can recharge during daylight and genuinely extend a home concentrator across a multi-day outage.
Register with your utility as a medical-needs customer — many prioritize power restoration for oxygen-dependent households.
Have a relocation plan for a long outage: a friend or family member with power, or a facility.

With that framing set, here's how to pick the right unit for your situation.

the math on oxygen concentrator power draw

Concentrator type	Typical draw	8-hour Wh needed
Portable, pulse-dose (POC)	40–100W	320–800Wh
Home 5L, continuous flow	300–400W	2,400–3,200Wh
Home 10L, continuous flow	500–600W	4,000–4,800Wh

The gap between a portable and a home unit is enormous. A pulse-dose portable sips power and is easy to back up. A continuous-flow home concentrator draws as much as a small refrigerator running non-stop. Know which one you have before you buy anything — it changes the answer completely.

Two non-negotiables for any concentrator:

Pure sine wave. Concentrators run compressor motors and control boards that need clean power. A modified sine wave inverter can make the unit error, overheat, or fail. Every pick below is pure sine wave.
Fast UPS switchover. If you want the concentrator to stay on the instant grid power drops, you want a unit with UPS mode and a fast transfer time (10–30ms) so the machine never actually cuts out.

best for a portable concentrator: anker solix c1000

Capacity: 1,056Wh LiFePO4
AC output: 1,800W continuous (2,400W peak), pure sine wave
UPS switchover: 20ms
Solar input: up to 600W
Price: ~$699

If you use a portable pulse-dose concentrator (under ~100W), this is the sweet spot. At that draw, 1,056Wh runs the unit for many hours — often a full night or more — and its UPS mode keeps the machine on the moment the grid drops. It charges fast (roughly an hour to full on wall power), so if the power flickers back mid-outage you top it off quickly, and it takes up to 600W of solar for daytime recharging.

What I like:

Pure sine wave and 20ms UPS — safe for a concentrator's electronics and seamless on an outage.
LiFePO4 cells rated ~3,000 cycles — years of use.
Light and portable enough to move room to room, or take along.
Fast wall and solar charging.

What I don't love:

Not enough for a home continuous-flow concentrator for long — this is the portable-unit pick.
The fan is audible when it works hard.

check price on the Anker SOLIX C1000

best bridge for a home 5l concentrator: ecoflow delta 2 max

Capacity: 2,048Wh LiFePO4 (expandable)
AC output: 2,400W continuous (4,800W surge), pure sine wave (TÜV certified)
UPS switchover: under 30ms
Solar input: up to 1,000W
Price: ~$1,600–$1,900

For a home 5L continuous-flow concentrator at ~350W, this is the right bridge unit. 2,048Wh gives you roughly 5 to 6 hours on the battery alone — enough for most shorter outages or to get through part of a night. Its big advantage is the 1,000W solar input: pair it with panels and it can recharge fast enough during daylight to meaningfully extend a home concentrator across a multi-day outage. It's also expandable, so you can add a battery to grow capacity later.

Be clear-eyed about the runtime: 5-6 hours is a bridge, not a full day. This unit's real power is battery-plus-solar, and as the daytime half of a plan where backup tanks cover the gaps.

What I like:

Pure sine wave, TÜV certified — clean, safe power for medical electronics.
1,000W solar input — genuinely extends a home concentrator with panels.
Expandable capacity without replacing the base unit.
Sub-30ms UPS mode keeps the concentrator running through the switch.

What I don't love:

Battery-only runtime on a home unit is hours, not a day — plan around that.
Heavy, and you're paying for output capacity a concentrator alone doesn't need.

check price on the EcoFlow Delta 2 Max

best for continuous dependency: ecoflow delta pro 3

Capacity: 4,096Wh LiFePO4 (expandable to much more)
AC output: 4,000W (8,000W surge), 120/240V, pure sine wave
Solar input: high, panel-scalable
Price: ~$2,000–$3,300

If oxygen is a 24/7 dependency and you want the most resilient battery-based setup, the Delta Pro 3 is the base to build on. The 4,096Wh battery runs a home 5L concentrator on the order of 10 hours on its own, it's expandable to far more, and with a proper solar array it becomes a system that can carry a home concentrator through extended outages by recharging every day. It's overkill for a portable POC, but for continuous-flow home oxygen it's the platform that scales.

This is a real investment. But for a household where oxygen cannot stop, it's the difference between a few hours of runway and a setup that, paired with solar and backup tanks, holds through the kind of multi-day outage that actually threatens an oxygen-dependent person.

check price on the EcoFlow Delta Pro 3

what to avoid

Any modified sine wave unit. This is the big one for concentrators. Cheap generators and inverters under ~$300 often use modified sine wave, which can damage or disable a concentrator's motor and electronics. Pure sine wave only. No exceptions for a medical device.

Undersizing to the "running watts." A concentrator's compressor can spike on startup. Give yourself margin over the running draw, and confirm your unit's surge rating clears it.

Treating the battery as the whole plan. Covered above, but it bears repeating: for a home concentrator, a battery is a bridge. Backup tanks from your supplier are your real fallback. Buy the power station and keep the tanks.

Lead-acid "medical backup" batteries. Heavy, inefficient, short-lived, and usually pricier per watt-hour than a modern LiFePO4 station. Skip them.

what i'd buy in each situation

Portable pulse-dose concentrator — Anker SOLIX C1000. Runs it for hours, light, fast to recharge.
Home 5L concentrator, shorter outages — EcoFlow Delta 2 Max. A solid 5-6 hour bridge; add a panel to stretch it.
Home concentrator, frequent or multi-day outages — EcoFlow Delta 2 Max or Delta Pro 3 plus real solar panels, so daylight refills what the night uses.
24/7 oxygen dependency — Delta Pro 3 as the base, solar to recharge, and backup cylinders from your supplier as the true fallback. Battery is a layer, not the answer by itself.

If your dependency is a CPAP rather than an oxygen concentrator, see best solar generator for CPAP — a much lower-power problem. To keep medication refrigerated through an outage, see best portable power station. And our power load calculator helps you size a setup for your exact flow rate and machine.

Some links on this page are affiliate links. We may earn a commission at no cost to you. An oxygen concentrator is life-support equipment — always coordinate backup power planning with your oxygen supplier and physician, and keep backup tanks. See our affiliate disclosure.

Frequently asked questions

How many watts does an oxygen concentrator use?: A home stationary concentrator (5L) typically draws 300 to 400 watts continuously; a 10L unit can pull 500 to 600 watts. Portable concentrators on pulse-dose mode draw far less — often under 100 watts. Continuous-flow home units are power-hungry: at 350 watts, a concentrator uses roughly 8,400 watt-hours over 24 hours.
What size battery do I need to run an oxygen concentrator?: For a portable pulse-dose concentrator under 100 watts, a 1,000Wh station runs it for many hours. For a home 5L concentrator at 350 watts, a 2,000Wh station gives you roughly 5 to 6 hours — a bridge through a shorter outage, not a full 24-hour day. For continuous dependency you need a large battery plus solar recharge, or a generator, and you should keep backup oxygen tanks from your supplier.
Does an oxygen concentrator need pure sine wave power?: Yes. Oxygen concentrators use compressor motors and sensitive control electronics that require pure sine wave power. A cheap modified sine wave inverter can cause the unit to error out, run hot, or fail. Only use a power station with a true pure sine wave inverter for an oxygen concentrator.
Can a battery keep my oxygen running through a long outage?: For a home continuous-flow concentrator, not on battery alone — the power draw is too high to cover many days. A battery is one layer of a plan, not the whole plan. Combine a large power station with solar panels to recharge during daylight, keep backup oxygen cylinders from your supplier, and have a plan to relocate if an outage runs long. Battery backup buys you time; it is not a substitute for coordinating with your oxygen provider.