Bluetti AC240
- AC delivered · measured
1,300 Wh. Show source
verified source~1,300-1,679 Wh (StorageReview / Trusted Reviews)2026-07-04- output
2,400 W. Show source
claimed sourcebluettipower.com ↗- surge
3,600 W. Show source
claimed sourcebluettipower.com ↗- weight
33 kg. Show source
claimed sourcebluettipower.com ↗
Balanced
#11 of 20
in the Large (2 kWh class) class
Lifted by Charging & solar and Trust & reliability; held back by portability.
Check current availability and pricing at the retailer.
Check price on AmazonSee alternatives to the Bluetti AC240 →At a glance
Bluetti AC240 is a large (2 kwh class) model best suited to cpap traveler. It supplies 2,400 W of continuous AC output. BatteryRank scores it 61 out of 100 within its size class.
Capacity truth
The watt-hour number on the box isn't what reaches your devices. Rated on the label vs what actually leaves an outlet.
1,536 Wh. Show source
claimed sourcebluettipower.com ↗2026-07-04The marketing number — total cell capacity.
1,300–1,679 Wh. Show source
verified source~1,300-1,679 Wh (StorageReview / Trusted Reviews)2026-07-04~1,300-1,679 Wh (StorageReview / Trusted Reviews) · 15% below the label
Also independently measured
- AC inverter efficiency
76–88 %. Show source
verified source~76-88% round-trip (StorageReview/Trusted Reviews)2026-07-04- Fan noise
42 dB. Show source
verified source~42 dB light load (reviewer-reported)2026-07-04- Solar performance
—. Show source
verified sourceReviewers report DC/low-light solar input underperforming vs rated in poor conditions2026-07-04
~76-88% round-trip (StorageReview/Trusted Reviews)
~42 dB light load (reviewer-reported)
Reviewers report DC/low-light solar input underperforming vs rated in poor conditions
What it can run
Same sourced device assumptions used by our calculators, applied to this model's usable AC energy. Actual runtime varies with load, temperature, and standby draw.
| Device | Estimated runtime | Sourced assumption |
|---|---|---|
| CPAP (humidifier off) | about 18.1 nights | 9 W · |
| CPAP (heated humidifier on) | about 2.9 nights | 56 W · |
| Refrigerator (full-size) | about 21 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 72 hours | 18 W · |
| Laptop (65W charger) | about 40 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 65 full charges | 20 W · |
Who it fits
Mechanical matches against this model's own sourced specs — never invented sentiment, never a guess on a spec we don't have.
1300 Wh AC-delivered (measured) → multiple CPAP nights per charge
2400 W inverter, 1300 Wh AC-delivered (measured) → runs a fridge through an outage
1536 Wh, expandable, 12V DC out → long off-grid stays
How it scores
Four buyer pillars over seven sub-scores — computed from sourced data with a published formula, price-independent by design.
Power
Battery-side usable capacity and how much you can run at once.
Usable watt-hours and how far you can grow it with add-on batteries, versus its size class.
Continuous and surge wattage, outlet count, and USB-C fast-charging.
Trust
Owner reputation, safety record, warranty, and build durability.
Owner ratings, brand reputation, recall record, and warranty backing.
Rated cycle life, warranty length, cell chemistry, and weather sealing.
Charging
est.Wall and solar recharge speed.
Wall recharge speed, solar input, and multi-source charging.
Livability
Lightweight, portable, and quiet enough to live with.
Weight, footprint, handle, and wheels, versus its size class.
Fan noise under load — quieter is better for bedrooms and CPAP use.
How this score is computed
The BatteryRank score is computed from sourced data with a published formula — ranked by data, not lab testing. Seven sub-scores blend into a 0–100 composite, grouped into four buyer pillars. Price is deliberately not a scoring input: prices move daily, so value intelligence lives in the price section above, judged against this model's own history.
| Pillar | Built from |
|---|---|
| Power | Capacity & expansion + Output & versatility |
| Trust | Trust & reliability + Durability & longevity |
| Charging | Charging & solar |
| Livability | Portability + Quiet / livability |
Scores are cohort-relative — each model is ranked against others in its size class. Missing inputs renormalize out rather than scoring zero (a model is never penalized for a spec nobody in its class publishes), and any figure resting on a documented estimate is tagged est. A full methodology page is coming.
Full specifications
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Tap or focus a figure to view its source.
Capacity & battery
- Battery-side usable capacity
1,536 Wh. Show source
claimed sourcebluettipower.com ↗- Rated cycle life
3,500 cycles. Show source
claimed sourcebluettipower.com ↗- Battery chemistry
LiFePO4. Show source
claimed sourcebluettipower.com ↗- Max capacity with expansion
10,136 Wh. Show source
claimed sourcebluettipower.com ↗- Rated capacity
1,536 Wh. Show source
claimed sourcebluettipower.com ↗- Cycle-life threshold
80 %. Show source
claimed sourcebluettipower.com ↗
Energy available from the battery before output-conversion losses. AC-delivered capacity is shown separately in Capacity Truth.
How many full charge-and-drain cycles before the battery drops to its rated threshold (shown alongside — brands rate to different thresholds, so never compare bare cycle counts).
The type of battery cell. LiFePO4 (LFP) cells last far more cycles and are more thermally stable than older lithium-ion (NMC) cells.
The largest total capacity this unit can reach once you add every supported expansion battery.
The battery's nameplate energy capacity — the headline number on the box. Battery-side usable and AC-delivered capacity are shown separately.
The remaining-capacity level the cycle rating is measured to. 3,000 cycles to 80% is a stronger battery than 3,000 cycles to 70% — always read the two numbers together.
Power output
- Continuous power output
2,400 W. Show source
claimed sourcebluettipower.com ↗- Surge power output
3,600 W. Show source
claimed sourcebluettipower.com ↗- AC outlets
3 outlets. Show source
claimed sourcebluettipower.com ↗- USB-A ports
2 ports. Show source
claimed sourcebluettipower.com ↗- USB-C ports
2 ports. Show source
claimed sourcebluettipower.com ↗- USB-C max output
100 W. Show source
claimed sourcebluettipower.com ↗- 12V car ports
1 ports. Show source
claimed sourcebluettipower.com ↗- DC barrel ports
0 ports. Show source
claimed sourcebluettipower.com ↗- Max combined output
2,400 W. Show source
claimed sourcebluettipower.com ↗
The most power you can draw at once, sustained — this has to be higher than the running wattage of whatever you're plugging in.
A brief power spike the unit can absorb when a device first switches on — matters for things with motors or compressors, like fridges.
How many standard wall-style outlets are built in.
How many USB-A ports are built in, for charging older phones, lights, and accessories.
How many USB-C ports are built in — check the per-port wattage below if you need fast charging for a laptop.
The fastest a single USB-C port can charge a device — relevant for laptops and fast-charging phones.
How many car-socket (cigarette-lighter) style 12V outputs are built in — what CPAPs and car fridges plug into for the most efficient overnight running.
How many round barrel-style DC outputs are built in, used by routers, some lights, and older electronics.
The most power the unit can deliver across ALL ports at the same time — can be lower than the AC rating plus every USB port added up.
Charging & solar
- AC recharge speed
2,200 W. Show source
claimed sourcebluettipower.com ↗- Max solar input
1,200 W. Show source
claimed sourcebluettipower.com ↗
How fast the unit recharges from a wall outlet — higher means shorter waits between uses.
The most solar panel wattage the unit can accept — undersized panels just mean slower charging, not damage, but oversizing this is wasted money.
Reliability & durability
- UPS switchover time
15 ms. Show source
claimed sourcebluettipower.com ↗
How fast the unit takes over when grid power cuts out. Under ~20ms is fast enough that most electronics — including many CPAP machines — won't even blip.
Size & portability
- Weight
33 kg. Show source
claimed sourcebluettipower.com ↗
How much the unit weighs on its own, without accessories — relevant for portability and carrying it up stairs during an outage.
What reviewers & owners report
Named outlets and marketplaces, each rating credited where it was published.
- IP65 water/dust resistance verified in rain/spray tests — Across reviewers ·
- expandable to 10+ kWh and parallel to 20 kWh — Across reviewers ·
- RV TT-30 + 30A DC — Across reviewers ·
- quiet at light load — Across reviewers ·
- long 6-yr warranty — Across reviewers ·
- Real AC input peaks below 2,200W claim (~1,700W measured) — Across reviewers ·
- thermal shutdown + slow cooldown after heavy drain — Across reviewers ·
- only sealed ports are weatherproof (not submersible) — Across reviewers ·
- premium price — Across reviewers ·
- now discontinued — Across reviewers ·
- Wirecutter: not a current pick / blocked to fetch
- Popular Mechanics: no dedicated review found
- Hobotech and Jasonoid covered it (Jasonoid did a rain test) — YouTube reviewers ·
- measured efficiency broadly aligns with spec — YouTube reviewers ·
- durability/IP65 claims held up in demos — YouTube reviewers ·
Brand reputation: r/bluetti and DIY Solar forum sentiment mostly positive on durability (RV/boat/off-grid users); isolated reports of inaccurate load display (AC240P) and cold-weather cutoff; CS/warranty-speed complaints; no widespread defect pattern
Sources: Trusted Reviews (no numeric, ~81% AC eff, 1,679Wh) https://www.trustedreviews.com/reviews/bluetti-ac240; StorageReview (1.3kWh out, 76% RT) https://www.storagereview.com/review/bluetti-ac240-water-resistant-portable-power; TechRadar (no score, "room for improvement") https://www.techradar.com/pro/bluetti-ac240-portable-power-station-review; Backup Power Hub 4.3/5 https://www.backuppowerhub.com/bluetti-ac240-review/; NerdTechy (recommends) https://nerdtechy.com/bluetti-ac240-review; Jasonoid + Hobotech YouTube; CNET/PCMag/PopMech none; Wirecutter blocked; CPSC none (2026-07-04)
What else to consider instead of the Bluetti AC240
Same or adjacent size class, ordered by the price-independent composite. Every alternative is better than the Bluetti AC240 at something and worse at something else, so each row states both halves — each one arithmetic on two sourced readings, with a dimension skipped rather than guessed when either side is missing a figure.
- DJI Power 2000score 75 · same size class
- Why you would switch
- The DJI Power 2000 delivers 34% more usable AC energy (1,741 Wh vs 1,300 Wh).
- What you give up
- The Bluetti AC240 reaches a full AC charge in 42 minutes against 90.
- Aferiy P280score 74 · same size class
- Why you would switch
- The Aferiy P280 delivers 34% more usable AC energy (1,741 Wh vs 1,300 Wh).
- What you give up
- The Bluetti AC240 reaches a full AC charge in 42 minutes against 68.
- Oupes Mega 2 Proscore 69 · same size class
- Why you would switch
- The Oupes Mega 2 Pro delivers 34% more usable AC energy (1,741 Wh vs 1,300 Wh).
- What you give up
- The Bluetti AC240 reaches a full AC charge in 42 minutes against 68.
- Anker SOLIX C2000 Gen 2score 68 · same size class
- Why you would switch
- The Anker SOLIX C2000 Gen 2 delivers 35% more usable AC energy (1,761 Wh vs 1,300 Wh).
- What you give up
- The Bluetti AC240 takes 50% more rated solar input (1,200 W vs 800 W) for off-grid recharging.
- Bluetti Elite 200 v2score 68 · same size class
- Why you would switch
- The Bluetti Elite 200 v2 delivers 60% more usable AC energy (2,074 Wh vs 1,300 Wh).
- What you give up
- The Bluetti AC240 reaches a full AC charge in 42 minutes against 84.
Quick answers
Each answer restates a sourced figure from elsewhere on this page — nothing new, nothing guessed.
- How much does the Bluetti AC240 weigh?
- 33 kg (72.8 lb), manufacturer-claimed, without accessories.
- What are the dimensions of the Bluetti AC240?
- 420 × 294 × 410 mm (16.5 × 11.6 × 16.1 in), length × width × height, manufacturer-claimed.
- How much capacity does the Bluetti AC240 deliver through an AC outlet?
- About 1,300 Wh of the rated 1,536 Wh reaches an AC outlet from a full charge — measured in independent testing.
- How many watts can the Bluetti AC240 output?
- 2,400 W continuous AC output and 3,600 W surge output, manufacturer-claimed. Appliance startup demand must stay within the relevant limit.
- How much solar input can the Bluetti AC240 accept?
- 1,200 W maximum solar input, manufacturer-claimed. Actual harvest depends on panel compatibility, sun, orientation, temperature, and conversion losses.
- What is the cycle-life rating of the Bluetti AC240?
- 3,500 cycles to 80% remaining capacity, manufacturer-claimed. A cycle rating is not a calendar-life guarantee.
- Can the Bluetti AC240 work as a UPS?
- Its manufacturer-claimed transfer time is 15 ms. Confirm that your connected equipment tolerates that transfer time; this is not the same as a zero-transfer online UPS.
- How far can the Bluetti AC240 expand?
- Up to 10,136 Wh with compatible expansion hardware, manufacturer-claimed. The base-unit capacity and expansion-system capacity are shown separately.