BLUETTI Elite 400
Top of the ranking on this page, using the criteria below.
3.84 kWh · 2.6 kW AC · 86.0 lb · $0.34/Wh
Best of · CPAP and medical
Best portable power stations for CPAP backup
A CPAP is an easy load to back up — a modest, steady draw over a predictable number of hours — which makes it one of the few cases where the arithmetic really does settle the purchase. This page does the arithmetic, then shortlists the models that fit it.
WattPicks does not test power stations, and this page does not claim to. Every specification, price and derived figure is read from the manufacturers’ own product pages; the ranking is computed from that data using the criteria stated above, not from first-hand use.
How this list was chosen
- Battery life first: this unit will be cycled every night, so rated cycles matter more than here than anywhere else.
- Low noise, because the station often sits in the bedroom it is powering.
- Value, since the job is well defined and does not need premium output.
- Capacity of 500 Wh and above, which is where a full night with headroom becomes realistic.
81 models in the dataset match this page’s scope, and 78 of them publish a list price, which is what the value figures need. Nothing here has been tested by us.
Quick picks
BLUETTI Elite 200 V2
The lowest published list price in this shortlist ($849).
2.07 kWh · 2.6 kW AC · 53.4 lb · $0.41/Wh
BLUETTI Elite 300
52.0 Wh per pound — the best in this shortlist.
3.01 kWh · 2.4 kW AC · 58.0 lb · $0.36/Wh
The shortlist, with what to accept
Every entry carries its trade-offs. They are computed by comparing the model with the others in its own capacity band, so they are statements about this dataset rather than opinions.
1. BLUETTI Elite 400
3.84 kWh · 2.6 kW AC · 86.0 lb · $0.34/WhWhy it is here: Lowest cost per watt-hour in this shortlist.
What you accept
- No published maximum solar input, so we cannot say how fast it recharges off-grid.
- No published noise figure, which matters if it will run in a bedroom or a tent.
- At 86.0 lb it is a two-person lift, not something you carry far.
Who should skip it: Skip it if you have to carry it any distance; this is a leave-it-in-place unit.
2. PECRON E3800LFP
3.84 kWh · 4.2 kW AC · 87.3 lb · $0.34/Wh
Why it is here: Lowest cost per watt-hour in this shortlist.
What you accept
- No published UPS switchover time — unverified for keeping electronics alive through a blip.
- No published noise figure, which matters if it will run in a bedroom or a tent.
- At 87.3 lb it is a two-person lift, not something you carry far.
Who should skip it: Skip it if you have to carry it any distance; this is a leave-it-in-place unit.
3. PECRON F3000LFP
3.07 kWh · 3.6 kW AC · 63.3 lb · $0.29/Wh
Why it is here: Lowest cost per watt-hour in this shortlist.
What you accept
- No published UPS switchover time — unverified for keeping electronics alive through a blip.
- No published noise figure, which matters if it will run in a bedroom or a tent.
- At 63.3 lb it is a two-person lift, not something you carry far.
Who should skip it: Skip it if you have to carry it any distance; this is a leave-it-in-place unit.
4. PECRON E3600LFP
3.07 kWh · 3.6 kW AC · 79.0 lb · $0.33/Wh
Why it is here: Lowest cost per watt-hour in this shortlist.
What you accept
- No published UPS switchover time — unverified for keeping electronics alive through a blip.
- No published noise figure, which matters if it will run in a bedroom or a tent.
- At 79.0 lb it is a two-person lift, not something you carry far.
Who should skip it: Skip it if you have to carry it any distance; this is a leave-it-in-place unit.
5. BLUETTI Elite 200 V2
2.07 kWh · 2.6 kW AC · 53.4 lb · $0.41/WhWhy it is here: Lowest cost per watt-hour in this shortlist.
What you accept
- No published UPS switchover time — unverified for keeping electronics alive through a blip.
- At 53.4 lb it is a two-person lift, not something you carry far.
Who should skip it: Skip it if you have to carry it any distance; this is a leave-it-in-place unit.
6. BLUETTI Elite 300
3.01 kWh · 2.4 kW AC · 58.0 lb · $0.36/WhWhy it is here: Lowest cost per watt-hour in this shortlist.
What you accept
- No published maximum solar input, so we cannot say how fast it recharges off-grid.
- No published noise figure, which matters if it will run in a bedroom or a tent.
- At 58.0 lb it is a two-person lift, not something you carry far.
Who should skip it: Skip it if you have to carry it any distance; this is a leave-it-in-place unit.
Buying guide
The nightly arithmetic
A CPAP without a humidifier typically draws around 30–40 W. Over eight hours that is roughly 240–320 Wh, and with inverter losses call it 350–400 Wh from the battery. That is one night on a 500 Wh station and two nights or more on a 1,000 Wh one.
The heated humidifier is what changes the answer. Heating is the most expensive thing a battery can do, and a humidifier running all night can multiply the draw several times over. If you use one, measure your machine’s actual consumption before sizing — or plan to run the humidifier off mains and the blower off the battery.
Why noise matters here more than elsewhere
Most power stations are silent. The ones that are not publish a noise figure, usually in the 30–50 dB range, and a unit sitting beside a bed is exactly where that number is audible. Where a vendor publishes no noise figure, the trade-offs on the entry above say so rather than guessing.
Outages are a UPS problem
If the concern is a power cut at 2 a.m. rather than camping, the transfer matters as much as the capacity. A station that publishes a switchover time under about 20 ms will keep the machine running through the transition; one that publishes none may also work, but it is unverified. Filter the list for models with a published figure if that is your scenario.
What this page is not
It is not medical advice, and no manufacturer publishes a "CPAP compatible" specification we could rank on. What is ranked here is energy arithmetic and published electrical data. If your machine has specific power requirements, or you need backup for a life-sustaining device, confirm them with the device manufacturer and consider a purpose-built medical battery.
Frequently asked
How long will a power station run a CPAP?
A CPAP without a humidifier draws roughly 30–40 W, so about 240–320 Wh over eight hours. A 500 Wh station covers one night with margin; a 1,000 Wh station covers two or more.
Can a power station run a CPAP with a heated humidifier?
Sometimes, but the heating element can multiply the draw several times over. Check your machine’s actual consumption rather than assuming, and consider running the humidifier from mains power where possible.
Do I need a UPS feature for CPAP backup?
If the goal is uninterrupted sleep through an outage, a published switchover time under about 20 ms means the machine will not restart mid-night. Models without a published figure are unverified for that.
How many nights will a 1,000Wh station run a CPAP?
Roughly two to three nights without a humidifier, allowing for inverter losses and a little headroom. Recharge between nights, or add a second battery before an extended outage.