Drawing · 11 × 7.9 × 8.7 in · 16.5 lb
- Capacity
- 448 Wh
- AC output
- 700 W
- Surge
- Not published
- Solar input
- 200 W
- Weight
- 16.5 lb
Maker price$399 at BLUETTI, sold out when checked Oct 11, 2026
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BLUETTI · Compact (under 600 Wh)
BLUETTI AC50B
A compact unit, 448 Wh, 700 W, 16.5 lb, $399 at BLUETTI, sold out when checked Oct 11, 2026 ($0.89 per Wh). By our sizing it holds a laptop and two phones, but not a day of home backup, a night of CPAP, two nights of camping, a day in an RV or a working day in a van.
From the maker's published figures and our own calculations; we have not tested it ourselves.
Estimated runtimehours24-hour dial
Rated capacity
448 Wh
448 Wh × 0.85 ÷ device watts. An estimate, not a measured test. Startup and connections need checking.
Drawing · 11 × 7.9 × 8.7 in · 16.5 lb
BLUETTI AC50B $399 at BLUETTI, sold out when checked Oct 11, 2026
Capacity 448Wh
AC output 700W
Surge Not published
Chemistry LiFePO4
Rated cycles 3,000 to 80%
Weight 16.5lb
Max solar input 200W
Price per Wh $0.89
Should you buy it?
Check first BLUETTI's store showed the AC50B sold out on Oct 11, 2026; check it is back before you plan around it.
Buy it for: a laptop and two phones (a laptop for six hours and two phone charges).
Not for: a day of home backup (too little capacity: needs 2,323 Wh and 1,351 W at startup); a night of CPAP (too little capacity: needs 599 Wh and 104 W at startup); two nights of camping (too little capacity: needs 2,066 Wh and 157 W at startup); a day in an RV (too little capacity: needs 648 Wh and 156 W at startup); a working day in a van (too little capacity: needs 1,674 Wh and 189 W at startup).
Choose it for 200 W of solar input against 100 W and room for extra batteries: $130 more than the Pecron E500LFP.
Choose the Pecron E500LFP instead if you want the most battery for the money: $0.47 per Wh against $0.89, $130 less, 2.5 lb lighter; you give up solar input (100 W against 200 W).
Not published The maker publishes no surge figure, so motor and compressor starts rest on its continuous rating.
About 381 Wh reaches the AC outlets after the 0.85 loss allowance (an estimate, not a measurement). At $0.89 per watt-hour, compare its cost with the charging speed and carry weight you need. It stores 27.1 Wh per pound. We list 28 other models in its size class; the four nearest in capacity are compared below.
What it runs, and for how long
Hours = capacity × 0.85 ÷ device watts, with the draws from the device table.
| Device | Draw W | Hours | Output and surge cover it? |
|---|---|---|---|
| CPAP machine (no heated humidifier) | 45 | 8.5 | yes |
| CPAP machine (with heated humidifier) | 53 | 7.2 | yes |
| Refrigerator (full-size, ENERGY STAR, ~18 cu ft top freezer) (average draw, compressor cycling) | 41 | 9.2 | no |
| Laptop (MacBook Air, charging) (charger rating, continuous) | 40 | 9.5 | yes |
| Wi-Fi router | 24 | 15.9 | yes |
| Starlink Mini (router built in) | 33 | 11.7 | yes |
| TV, 50-inch LED / Crystal UHD | 89 | 4.3 | yes |
| Camp LED light set (4 chainable lights) | 6 | 60.4 | yes |
"Yes" means its continuous output covers the draw and its surge rating covers the startup figure we use, by arithmetic on ratings, not a test. Startup figures: the CPAP with its humidifier, 104 W at startup, from ResMed's peak figure; the refrigerator, 1,300 W startup allowance, from a larger 27 cu ft Whirlpool's tech sheet. Your own appliance's label or manual has its own.
Sockets and size
- Two AC outlets, 700 W in total
- Two USB-C ports, up to 65 W from one port
- One USB-A port
- One 12 V outlet
How many of each socket and their limits, from the maker's spec sheet; it does not say where each one sits on the unit. It weighs 16.5 lb.
At a glance
How it compares with the other 28 compact models, on the makers' figures. We don't boil it down to one score; see how we pick.
| What it can power | Covers a laptop and two phones. Output and surge cover 13 of the 17 devices in our list, on the startup figures we use |
|---|---|
| Price per Wh | $0.89 per Wh, 14th lowest of 29 compact units |
| Portability | 16.5 lb, 28th lightest of 28 compact units |
| Recharge speed | 200 W of solar input: at least 2.2 hours of full sun at that limit to refill (an ideal minimum, not clock time); 580 W from the wall |
| Chemistry and cycle life | LiFePO4, rated 3,000 cycles to 80% |
| Expandability | Takes extra batteries; 20 ms UPS switchover |
Full spec sheet
| Capacity | 448 Wh |
|---|---|
| Chemistry | LiFePO4 |
| Rated cycle life | 3,000 to 80% |
| Expandable | yes, to a maximum the maker does not state |
| Continuous AC output | 700 W |
|---|---|
| Surge (peak) output | – |
| AC outlets | 2 |
| USB-C ports / highest output | 2 / 65 W |
| USB-A ports | 1 |
| 12 V outputs | 1 |
| Wireless charging pad | no |
| UPS / EPS switchover | 20 ms |
| Max AC input | 580 W |
|---|---|
| Wall recharge time | 1.2 h |
| Max solar input | 200 W |
| Stated solar recharge time | 2.7 h at maximum input |
| App control | yes |
| Weight | 16.5 lb (7.5 kg) |
|---|---|
| Dimensions | 11.0 x 7.9 x 8.7 in (280 x 200 x 220 mm) |
| Wh per lb | 27.1 |
| Release year | – |
| Warranty | 5 years |
| List price | – |
|---|---|
| Store price | $399 at BLUETTI, sold out when checked Oct 11, 2026 |
| Price per Wh | $0.89 |
Before using the battery's cycle rating to judge value, read what LiFePO4 versus NMC means for lifespan and weight.
What the output figures mean for your devices: running and surge watts, and what a 20 ms switchover means if you use it as a UPS.
Which maker panels its solar input takes, how to wire them and the hours of sun to refill it: the AC50B solar setup.
Alternatives at this size
Listed smallest to largest by capacity; this unit is among them.
Select up to three models to compare.
Drawing · 10.6 × 10.2 × 7.7 in · 13.2 lb
- Capacity
- 499 Wh
- AC output
- 500 W
- Surge
- 1,000 W
- Solar input
- 220 W
- Weight
- 13.2 lb
Maker price$309 at EcoFlow, checked Oct 11, 2026
Drawing · 11.3 × 7.8 × 7.8 in · 16.1 lb
- Capacity
- 499 Wh
- AC output
- 500 W
- Surge
- 1,000 W
- Solar input
- 200 W
- Weight
- 16.1 lb
Maker price$499.95 at Goal Zero, checked Oct 9, 2026
Drawing · 10.7 × 7.3 × 9.4 in · 14.3 lb
- Capacity
- 512 Wh
- AC output
- 800 W
- Surge
- Not published
- Solar input
- 200 W
- Weight
- 14.3 lb
Maker price$279 $329 at Aferiy, checked Oct 11, 2026
Drawing · 12 × 8.1 × 7 in · 16.1 lb
- Capacity
- 512 Wh
- AC output
- 1,000 W
- Surge
- Not published
- Solar input
- 300 W
- Weight
- 16.1 lb
Maker price$299 $499 at DJI, checked Oct 9, 2026
No models match these filters.
| Model | Wh | Output W (surge) | lb | Solar input W | Chemistry | Cycles | Price at maker $ | Price per Wh | Store |
|---|---|---|---|---|---|---|---|---|---|
| BLUETTI AC50B | 448 | 700 W | 16.5 | 200 | LiFePO4 | 3,000 to 80% | $399sold out when checked Oct 11, 2026 | $0.89 | See it at BLUETTI Check price on AmazonAmazon's price may differ |
| EcoFlow RIVER 2 Max 500 | 499 | 500 W (1,000 surge) | 13.2 | 220 | LiFePO4 | 3,000 to 80% | $309checked Oct 11, 2026 | $0.62 | See it at EcoFlow Check price on AmazonAmazon's price may differ |
| Goal Zero Yeti 500 | 499 | 500 W (1,000 surge) | 16.1 | 200 | LiFePO4 | 4,000 to 80% | $499.95checked Oct 9, 2026 | $1.00 | See it at Goal Zero |
| Aferiy P010 | 512 | 800 W | 14.3 | 200 | LiFePO4 | 3,500 to 85% | $279 | $0.54 | Check price on AmazonAmazon's price may differ See it at Aferiy |
| DJI Power 500 | 512 | 1,000 W | 16.1 | 300 | LiFePO4 | 4,000 to 70% | $299 | $0.58 | See it at DJI Check price on AmazonAmazon's price may differ |
See it at BLUETTI Check price on AmazonAmazon's price may differ Every BLUETTI model we cover Does it hold enough for your devices?
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Before connecting panels, compare your array's cold-morning open-circuit voltage and short-circuit current with this model's solar-input limits in its manual.
Sources
- Specs: BLUETTI product page
- Specs (manual: weight, DC input): BLUETTI user manual (PDF)
- Price: BLUETTI product page, checked Oct 11, 2026
- How the figures and picks are made