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EcoFlow Delta 2 vs Bluetti AC180 — Full Comparison for CPAP Backup (2026)
| Spec | EcoFlow Delta 2 | Bluetti AC180 |
|---|---|---|
| Capacity | 1024 Wh | 1152 Wh |
| AC Output | 1800 W | 1800 W |
| Pure Sine Wave | Yes | Yes |
| Weight | 27 lbs | 17 lbs |
| Price | $999 | $899 |
| CPAP Runtime | ~22h | ~25h |
The short answer
For most CPAP users in 2026, the Bluetti AC180 is the better value — slightly more capacity (1152 Wh vs 1024 Wh), 10 lbs lighter, and typically $100-150 cheaper at street prices. The EcoFlow Delta 2 wins if you live in an area with frequent rolling outages where its X-Stream charging (80% in 50 min) makes a real difference, or if you want to expand to a 3kWh+ system later.
Both use LFP cells rated for 3000+ cycles, so the chemistry argument that separates them from the Jackery 1000 doesn’t apply between these two. The decision is about weight, charging speed, and ecosystem.
What the spec table doesn’t tell you
The auto-generated comparison above shows capacity, output, runtime estimate, and price. The real differences are below.
Weight is the underrated spec
The Delta 2 is 27 lbs. The AC180 is 17 lbs — same weight class as the much-smaller EcoFlow River 2 Pro, despite holding more energy.
For a home-backup unit that lives in a closet, the 10-lb difference disappears. For anything you’ll lift into a car, carry into an RV, or move between rooms during an outage, it’s the most-felt difference between these two units. The AC180’s capacity-to-weight (67.7 Wh/lb) is roughly 1.8x the Delta 2’s (37.9 Wh/lb).
Charging speed — Delta 2’s clear edge
- EcoFlow Delta 2: 0 to 80% in 50 minutes (X-Stream)
- Bluetti AC180: 0 to 80% in ~45 minutes (Turbo charging)
Bluetti’s marketing claims a slight edge, but in practice they’re effectively tied for fast wall charging. Both are dramatically faster than the original Explorer 1000’s legacy 7-hour wall charge (Jackery’s v2 refresh closed that gap with 1-hour charging).
Where the Delta 2 actually pulls ahead is in solar/car charging flexibility and the consistency of the fast-charge curve under partial-grid scenarios. If you’re on a generator or unstable shore power, the Delta 2’s input handling is a touch more forgiving.
Surge headroom for humidifier startups
Both units offer 1800W continuous AC and a software-boosted ceiling (Delta 2’s X-Boost at 2700W, Bluetti’s Power Lifting at 2700W). For CPAP + heated humidifier + heated tubing, both have plenty of headroom — humidifier inrush spikes of 200-300W are absorbed cleanly on either.
If you ever plan to run a small medical device alongside CPAP (nebulizer, etc.), they’re both safe. Neither will trip on a typical CPAP-class load.
Ecosystem and expansion
- EcoFlow Delta 2: pairs with the Delta 2 Extra Battery to reach ~2kWh, or DELTA Max Smart Extra to push higher. Mature expansion path if you grow into more demand.
- Bluetti AC180: no expansion battery on this model. What you buy is what you have.
For a CPAP user who might someday want to back up a fridge or run multi-night humidifier setups without recharging, EcoFlow’s expandability is real value. For everyone else, it’s a feature you’ll never use.
Pricing reality
- EcoFlow Delta 2 MSRP $999 — typical sale $549-699
- Bluetti AC180 MSRP $899 — typical sale $599-699
Delta 2 discounts harder during big sale events (Black Friday, Prime Day have hit $479). AC180 has a more stable street price closer to $599-649. On any given Tuesday, the AC180 tends to be the cheaper unit — but on a sale day, the Delta 2 can undercut it.
App and UX
Both ship with apps. EcoFlow leans on the app harder — some advanced features (custom charging curves, port automation) are app-only. Bluetti’s display is slightly more usable standalone, and the app is optional for basic operation.
If you want a “no-phone needed” experience, AC180 is friendlier. If you want maximum remote control and monitoring, EcoFlow.
Recommendation by user type
| Profile | Pick |
|---|---|
| Lifting it in and out of a car or RV regularly | Bluetti AC180 (10 lbs lighter) |
| Frequent outages, every minute of recharge matters | EcoFlow Delta 2 (X-Stream) |
| Plan to expand to 2kWh+ later | EcoFlow Delta 2 (expandable) |
| Want lowest reliable street price | Bluetti AC180 |
| Prefer minimal app dependency | Bluetti AC180 |
| Heavy-app user who likes remote monitoring | EcoFlow Delta 2 |
| Heated humidifier + heated tubing nightly | Either; both handle the surge cleanly |
Buy
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Frequently Asked Questions
Which is better for CPAP, EcoFlow Delta 2 or Bluetti AC180?
For most CPAP users in 2026, the Bluetti AC180 wins on value: 1152 Wh capacity (vs 1024 Wh), 17 lbs (vs 27 lbs), and typically $100-150 cheaper at street prices. The EcoFlow Delta 2 wins if you need fast X-Stream charging or plan to expand to 2kWh+ with the Delta 2 Extra Battery.
How many nights can the Bluetti AC180 or EcoFlow Delta 2 power a CPAP?
At a typical 35-50W CPAP draw without humidifier, the AC180's 1152 Wh delivers roughly 2-3 nights (16-25 hours of runtime). With heated humidifier on (40-60W average), expect 1.5-2 nights. The EcoFlow Delta 2's 1024 Wh gives about 10-15% less runtime in the same scenarios.
Is the EcoFlow Delta 2 or AC180 quieter for bedside CPAP use?
Both are silent during AC discharge under typical CPAP loads (under 100W). Cooling fans only engage during high-draw or fast-charging. For overnight bedside use neither makes audible noise — the fan threshold sits well above CPAP draw on both units.
Can the Bluetti AC180 or EcoFlow Delta 2 charge while powering a CPAP (UPS pass-through)?
Yes — both support AC pass-through. Plug your CPAP into the unit, plug the unit into wall power, and during an outage the battery takes over with sub-30ms switching. Both function as effective UPS units for CPAP loads.
Which has better warranty, EcoFlow Delta 2 or Bluetti AC180?
Both offer 5-year warranties on the LFP battery (3000+ cycle rating). EcoFlow's warranty support is typically faster in North America; Bluetti's has historically been slower for non-US claims but is improving. Neither covers shipping damage well — inspect on arrival.
Will either unit run a CPAP with heated humidifier and heated tubing?
Yes — both have 1800W continuous AC output and 2700W surge handling (X-Boost on Delta 2, Power Lifting on AC180). A CPAP plus heated humidifier plus heated tubing typically draws 60-90W steady with brief 200-300W startup spikes, well within both units' clean operating range.