Head-to-head test
BLUETTI AC50B vs Goal Zero Yeti 300
Pay the extra for the AC50B if anything you run plugs into an AC socket: its 151Wh and 350W of extra headroom are the difference between a CPAP reaching the alarm and quitting with a fifth of the night still to go.
Full profiles: BLUETTI AC50B → · Goal Zero Yeti 300 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
Spec deltas
The BLUETTI AC50B costs $49 more than the Goal Zero Yeti 300 and holds 151Wh more: 448Wh against 297Wh, behind a 700W inverter to the Yeti's 350W. Half again the battery and twice the continuous output, in a box that weighs 1.1 lb more. That's the trade on the table, and it's a good one.
Where it shows up is a bedroom. A CPAP overnight asks for about 320Wh; after the 85% usable derate the AC50B has 381Wh to give and the Yeti 252Wh. One finishes the night with 61Wh left. The other goes quiet with roughly a fifth of the night still ahead, which is a poor moment for a breathing machine to stop.
The Yeti 300 has a genuine case, and it isn't small. It's the cheaper box, it carries two AC outlets to the AC50B's one, and its USB-C port does 100W to the AC50B's 65W. Its cells are rated for 4,000 cycles against 3,000, and one review credits it with IP54 sealing and a 50-minute wall rechargeB2. If nothing you own needs more than a USB-C cable, that list wins. The moment the job is an AC load through the night, it doesn't.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
The switchover ceilings are identical, so when the grid drops at midnight both units catch the CPAP the same way. The difference arrives hours later, when the Yeti runs dry having covered about 79% of the load. Its faster charger and its extra cycles don't help a battery that's empty before the alarm.
AC50B: 448Wh rated, 381Wh usable after the 85% derateYeti 300: 297Wh rated, 252Wh usable after the same derateCPAP Overnight scenario needs 320WhBoth list a switchover of no worse than 20ms
Why it mattersAnyone buying for a CPAP should take the AC50B and treat the price gap as the cost of sleeping through.
continuous output
BLUETTI publishes no surge number for the AC50B, so treat 700W as its ceiling. That ceiling still sits above the Yeti's 600W peak, which means anything the Yeti can start, the AC50B can simply run.
AC50B: 700W continuous; no surge figure publishedYeti 300: 350W continuous, 600W published surgeTailgate Party scenario: 400W peak; the Yeti starts it but can't sustain it, the AC50B sustains it
Why it mattersIf anything on your list draws between 350W and 700W, the Yeti is out before runtime even comes up.
cost / lifetime kWh
Divide each lifetime into its price and the two land a cent apart per kilowatt-hour, the Yeti a hair ahead. Its longevity edge pays for its smaller battery and no more. Cycle life is a tie in dollars; capacity isn't.
Yeti 300: 4,000 cycles of 297Wh = 1,188 kWh over its rated lifeAC50B: 3,000 cycles of 448Wh = 1,344 kWh over its rated lifeLifetime cost: $0.29 per kWh for the Yeti 300, $0.30 for the AC50B
Why it mattersDon't buy the Yeti for its cycle rating; it costs the same per kilowatt-hour over its life and hands each one over in smaller doses.
weight
For a laptop-and-phone day those are the specs you actually touch: 100W feeds a hungry laptop that 65W only trickles, and a 50-minute refillB2 has it full again before lunch. The advantages stop at the AC socket, which is where the CPAP, the fan and the small appliance plug in.
Yeti 300: 100W USB-C, 2 AC outlets, 2 USB-A, 13.7 lbAC50B: 65W USB-C, 1 AC outlet, 1 USB-A, 14.8 lbYeti 300: IP54 and 0-100% in 50 minutes, per one reviewB2AC50B: about 3 hours from the wall, 1.25 hours with the optional 480W Turbo chargerA3
Why it mattersIf your entire load lives on USB-C and the unit lives outdoors, take the Yeti and keep the difference.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: CPAP Overnight is the modeled load that splits them: the AC50B finishes with 61Wh spare, the Yeti 300 falls 68Wh short.
Five of the seven modeled loads come back 'neither,' and that's the useful headline: these are small batteries. A weekend of camping wants 2,100Wh, an eight-hour blackout 1,645Wh, a remote workday 910Wh. The AC50B covers about 42% of that workday and the Yeti about 28%. Buy either for those jobs and you've chosen the wrong size very carefully.
The two rows that aren't 'neither' point in opposite directions, and that's the page in miniature. A 100Wh afternoon off-grid goes to both, and there the Yeti's lighter body and lower price are the tiebreak. A CPAP overnight goes to the AC50B alone, 84% used against the Yeti's 127%. Small load, either box; a full night, only the bigger battery is still running.
Runtime: Will It Power Your Gear?
Selected because: 448Wh and 700W against 297Wh and 350W: the extra battery and the doubled inverter come in the same box.
continuous output
The bigger battery and the bigger inverter arrive together, which is rarer than it sounds. A small-station choice is usually runtime against weight, or output against price. Here $49 buys 129Wh more usable energy (381Wh against 252Wh after the derate) and 350W more continuous output, for 1.1 lb.
The output gap is a wall, not a slower drain. The Yeti's 350W rating trips on a 400W load however full the battery is. BLUETTI publishes no surge figure for the AC50B, so don't plan on more than 700W for motors; its 1,000W Power Lifting number covers resistive loads only, which it runs gentler rather than harder. Neither unit expands, so whichever you buy is the size you'll own.
Portability & Form Factor
Selected because: The Yeti 300's real wins live here: 1.1 lb lighter, 100W USB-C to 65W, and two AC outlets to one.
weight
1.1 lb separates them, which is to say nothing does: both are one-hand carries. Where the Yeti earns its keep is the faceplate. Two AC outlets to the AC50B's one, two USB-A to one, and USB-C at 100W against 65W. Two AC plugs on the AC50B means packing a power strip; on the Yeti it means two sockets.
Then there's the shell. One review credits the Yeti with IP54 sealing, rubberized corners and a sturdy handleB2, which makes it the one to leave in a truck bed overnight. Both take 200W of solar, so at full input the Yeti refills in about an hour and a half and the AC50B in a bit over two (297Wh and 448Wh, each divided by 200W). The Yeti is the better object to throw around. The AC50B is the better object to plug into.
Lifetime Value
Selected because: The Yeti's 4,000 cycles against 3,000 is its headline spec, and over each unit's rated life the two land within a cent per kilowatt-hour.
cost / lifetime kWh
The Yeti's one durability boast comes out even. Its 4,000 cycles of 297Wh add up to 1,188 kWh; the AC50B's 3,000 cycles of 448Wh add up to 1,344 kWh. Divide by price and they land a cent apart per lifetime kilowatt-hour, the Yeti a hair cheaper. That's a tie wearing a spec-sheet badge.
Both numbers also sit decades out. Cycled every weekend, the AC50B's rating lasts 28.8 years and the Yeti's 38.5; cycled daily, 8.2 against 11. On weekend use either outlasts five years of warranty cover more than five times over, so pick on capacity and output, which you'll notice every week, not on cycle life, which you'll never reach.
What the Specs Don't Tell You
Selected because: BLUETTI publishes a 45dB figure and a resistive-only Power Lifting mode; Goal Zero publishes no noise figure for the Yeti 300.
rated cycles
BLUETTI publishes 45dB for the AC50B; Goal Zero publishes no noise figure for the Yeti 300. That 45dB is the maker's own rating, and makers don't agree on whether they quote a quiet floor or a figure under load, so it's a number to hold BLUETTI to rather than a reading of your bedroom. A blank on the Yeti's sheet isn't evidence of a loud fan either. If it's going beside your bed, listen to whichever you buy before the return window closes.
Power Lifting is narrower than its 1,000W figure suggests. It runs a resistive appliance by feeding it less than it asks for, so a heater heats slowly, and it does nothing for a compressor or a motor. On a 448Wh battery a kettle is a short visit either way. Nice to have; not a reason to buy.
Strengths & trade-offs
BLUETTI AC50B
Strengths
- +Larger battery capacity
- +Higher AC output
Trade-offs
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Yeti 300's 4,000, so it wears out sooner.
Goal Zero Yeti 300
Strengths
- +Costs $49.1 less
- +Lighter by 1.1 lb
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on seven real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the AC50B comes up 1,719Wh short (about 18% covered), the Yeti 300 1,848Wh (12%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither unit covers this scenario's 1,645Wh: the AC50B comes up 1,264Wh short (about 23% covered), the Yeti 300 1,393Wh (15%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
AC50B
A CPAP night comes to about 320Wh. After the usable derate the AC50B has 381Wh and finishes at 84% used, 61Wh to spare. The Yeti 300 has 252Wh, comes up 68Wh short, and covers about 79% of the night. Only one of these is still running at the alarm.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
Neither unit covers this scenario's 910Wh: the AC50B comes up 529Wh short (about 42% covered), the Yeti 300 658Wh (28%). Treat this as partial cover — enough for the essentials in it, not the whole list.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Neither unit
Neither finishes a 670Wh tailgate, but they fail differently. The Yeti 300's 600W surge starts the 400W peak and its 350W continuous rating can't hold it, so it trips with charge still in the battery. The AC50B holds the peak on its 700W inverter and runs out of energy instead, 289Wh short. Wrong size either way; the AC50B at least runs the load until the battery is done.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the AC50B comes up 4,304Wh short (about 8% covered), the Yeti 300 4,433Wh (5%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
SCN-07 · an afternoon · needs 100Wh
Afternoon Off-Grid
Phones and a speaker at the park, beach, or campsite — the small-unit job description
Either unit
Both handle a 100Wh afternoon with room left over: the AC50B finishes at 26% used, the Yeti 300 at 40%. With capacity off the table, the tiebreak is the bag and the receipt. The Yeti is 1.1 lb lighter, the cheaper of the two, and has the faster USB-C port, so this is the row where it earns the nod.
Battery budget usedlower = more headroom
LOAD Phone Charger (×2) 30W×2h · Bluetooth Speaker 10W×4h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: AC50B runs 1.9h vs 1.2h.
$399 list · direct from BLUETTI
Planning for more than this? Describe your whole setup and get it sized →
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–25.4hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–5.1hHigh-Draw Appliances
These reveal the real limits¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
October 11, 2026
Verdict: the AC50B, on Power Score margin
Buy the AC50B. It costs $49 more and hands back 448Wh against 297Wh and 700W of continuous output against 350W, and it's the only one of the two that finishes a CPAP overnight, with 61Wh to spare where the Yeti 300 comes up 68Wh short. The Yeti's case is real and narrow: it's the cheaper box, 1.1 lb lighter, with two AC outlets to the AC50B's one and 100W over USB-C to its 65W, and one review records a 0-100% wall recharge in 50 minutesB2 where the AC50B takes about 3 hours without its optional Turbo chargerA3. If your whole load is a laptop and a phone, take the Yeti and keep the difference. If anything runs off the AC socket through the night, the extra money is buying exactly the watt-hours you'd otherwise run out of.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 11, 2026. The links below open BLUETTI's and Goal Zero's current prices.
$399.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
or check the Yeti 300 price$349.95 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated October 11, 2026
Black Friday · 26 days out
Prices to beat:AC50B $279Yeti 300 $350
The lowest we have recorded for each. We have never seen the Yeti 300 discounted, so any real cut on it would be a first.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, AC50B rates 4.6/5 (79th percentile of 25 Personal-class units), and Yeti 300 rates 3.7/5 (25th percentile of 25 Personal-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
AC50B: 45dB Published
45dB is about as loud as a running refrigerator. It is BLUETTI's own rating rather than a reading on a shared bench — makers differ on whether they quote a best case or a figure under load, so treat it as a starting point rather than what you would hear at a bedside. For most people, fan noise around 45dB and up is where sleep starts to suffer.
AC50B: Power Lifting to 1,000W
The AC50B has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 1,000W from its 700W inverter. It does that by delivering less power than the appliance asks for, not more than the inverter has: the heater still works, it just heats more slowly. Two things follow. BLUETTI scopes the mode to purely resistive loads — a heater, a kettle, an incandescent lamp — so it does nothing for a fridge compressor, a pump or a power tool, and this record publishes no surge figure at all, so read the mode as a resistive-load feature rather than as starting ability. And it is not a reason to size down, because running a load that big from 448Wh is a short session either way. Genuinely useful if a heater or a kettle is why you're buying; beside the point otherwise. The Yeti 300 publishes no equivalent.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The AC50B's figure is a maximum rather than a guarantee — it depends on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term.
More laps of a shorter track
The Yeti 300 is rated for 4,000 cycles to the AC50B's 3,000, but a Yeti cycle is 297Wh and an AC50B cycle is 448Wh. Over the rated life that's 1,188 kWh against 1,344, and divided into their prices the two land within a cent per kilowatt-hour. Daily use gives 11 years against 8.2; weekend use, decades for both. A real spec, and a tie in dollars.
Yeti 300: Noise Level Not Disclosed
The AC50B publishes its noise level (45dB); the Yeti 300 doesn't publish one. That isn't evidence the Yeti 300 is louder — it means there's no figure to hold it to, and no way to compare the two on this without hearing them. If you're buying for a bedroom, a CPAP, or an apartment, treat the AC50B's 45dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the Yeti 300 before deciding.
Ownership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
Both units have similar long-term ownership costs ($0.30/kWh vs $0.29/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off. One caution on the lifespan row: the Yeti 300 takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit — the AC50B still delivers more over its shorter horizon (1,344 vs 1,188 kWh). Years measure wear, not usefulness.
Brand trust
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
BLUETTI's support is the variable in this purchase: email-first, China-timezone lag, and outcomes that range from efficient to weeks of back-and-forth, sometimes ending in a discount on a new unit instead of a repair. Buying direct from BLUETTI tends to go better, and it's also how the AC50B's five-year term is reached.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it — the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Goal Zero
Ecosystem
Focused — a compact current line (6th-gen Yeti and Yeti Pro series), the previous-gen X series now out of stock across every model on Goal Zero's own store (checked 2026-09-13: 200X, 500X, 1000X, 1500X, 3000X, 6000X, some listed only as open-box), so buying one new means finding retailer stock, Sherpa power banks for the under-100Wh tier, plus Alta coolers, Nomad/Ranger solar panels, and vehicle integration kits
Support
Goal Zero is a Salt Lake City company owned by NRG Energy, and US-based support was long the reason to pay its prices. Recent reports describe long waits and email tickets left for weeks, and the official community forums have been shut. The badge still carries a premium; the service behind it is less dependable than it was.
Community
Small but loyal — strong following in overlanding and preparedness communities. Official community forums were recently shuttered, frustrating long-time users.
App experience
Rated 4.4/5 iOS (~1,200 ratings) but recent reviews skew negative — recurring connectivity issues, crashes, and stability problems.
Unique strength
Pioneer of the portable power market — strongest brand heritage. US-based company with ruggedized, weather-resistant designs (IP ratings vary by model). Integrated "Yeti-Ready" ecosystem with coolers, lights, and vehicle kits.
Worth knowing
Typically the priciest brand per watt-hour — though individual pairings vary, and on some pages the Yeti is the cheaper energy. Support quality has declined from its "premium" standard. Perceived as competitively stagnant vs. faster-innovating Chinese competitors. Reliability reports on newer models are concerning.
Analyst note
Neither support desk is a reason to choose its brand, so let the hardware decide. Both carry five years of cover, BLUETTI's conditional on buying direct or registering, Goal Zero's stated plainly. What's left between the brands is price position: Goal Zero charges more per watt-hour of capacity here, as it usually does, and BLUETTI charges less.
Growth path
AC50B
FIXED CAPACITYFixed at 448Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 200W of solar. Limited to a single portable panel.
Limited ports. You'll likely need a power strip or splitter.
Yeti 300
FIXED CAPACITYFixed at 297Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 200W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the AC50B gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
BLUETTI AC50B
What's on record for the AC50B comes from reviewers rather than long-term ownersA1A2A3, so treat it as a first impression, not a reliability history. Reviewers agree it's a genuinely portable sub-15-lb unitA2 and that the 700W inverter with 1,000W Power Lifting covers more than a box this size suggestsA1.
Charging is the soft spot. Standard wall charging runs about 3 hours, and the 1.25-hour figure needs the optional 480W Turbo charger, bought separatelyA3. BLUETTI's own FAQ is clear that its B80 battery only recharges the AC50B in Power Bank Mode rather than extending itA4, so plan on 448Wh being the whole of it.
“A 448Wh LiFePO4 battery with 700W output (1,000W Power Lifting), rated for 2,500+ cycles to 80% — years of reliable use.”
Sources
amazon.com · backuppowerhub.com · the-gadgeteer.com · t3.com · bluettipower.com
Goal Zero Yeti 300
The Yeti 300's coverage splits along one seam: the build impresses and the battery is smallB1B2B3. One review credits it with IP54 sealing, rubberized corners, a sturdy handle and a 0-100% recharge in 50 minutesB2; another notes Goal Zero backs it with a long-lived LFP pack rather than raw outputB1.
The other half is less kind. One reviewer clocked 4 to 6 hours on a laptop or 20 to 30 phone charges, and watched it shut down two minutes into running a coffee makerB3; another called the price a sting for the capacityB4. It's bench time rather than years of ownership, same as the AC50B, but the complaint lines up exactly with the 297Wh on the label.
“A 297Wh LiFePO4 pack behind a 350W pure sine inverter (600W surge), rated 4,000 cycles — Goal Zero backs it with a long service life rather than raw output.”
Sources
goalzero.com · batteryskills.com · campingsolar.us · trailandkale.com · the-gadgeteer.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Affordable, genuinely portable LFP unit with 700W output, 3,000+ rated cycles (BLUETTI), fast Turbo charging, and B80 support in Power Bank Mode (recharge, not expansion). [AC50B · 3 entries]
- Modern LFP (4,000+ cycles), IP54 ruggedness, and fast charging are the praise; small capacity and high price are the caveats. [Yeti 300 · 3 entries]
- A1
“A 448Wh LiFePO4 battery with 700W output (1,000W Power Lifting), rated for 2,500+ cycles to 80% — years of reliable use.”
amazon.com / backuppowerhub.com — AC50B review · 2026 · [positive]
- A2
“At 14.8 lbs it's meaningfully lighter than the AC70 (21.4 lbs) — a genuinely portable sub-15-lb unit with a long-cycle battery and 700W output at an easy-to-justify price.”
backuppowerhub.com / the-gadgeteer.com — AC50B review · 2026 · [positive]
- A3
“Standard AC charging is about 3 hours, dropping to 1.25 hours with the optional 480W Turbo charger; 0-80% in 45 minutes.”
amazon.com / t3.com — AC50B review · 2026 · [positive]
- A4
“The B80 can add 806Wh, but BLUETTI scopes this to "capacity expansion with B80 battery in Power Bank Mode" over an Aviation-to-XT60 cable — the pack recharges the unit rather than extending it as one system, so this is not expandability in the sense this site uses. At $279 it is BLUETTI's most affordable LiFePO4 station.”
bluettipower.com AC50B FAQ (primary) · 2026 · [positive]
- B1
“A 297Wh LiFePO4 pack behind a 350W pure sine inverter (600W surge), rated 4,000 cycles — Goal Zero backs it with a long service life rather than raw output.”
goalzero.com / batteryskills.com — Yeti 300 review · 2026 · [positive]
- B2
“At 13.7 lbs, meets IP54 for dust and water resistance, with top-tier build quality — rubberized corners and a sturdy handle; recharges 0-100% in 50 minutes.”
campingsolar.us / trailandkale.com — Yeti 300 review · 2026 · [positive]
- B3
“The 297Wh capacity limits it to lighter-duty use — 4-6 hours on a laptop or 20-30 phone charges — and it struggled near its 300W limit, shutting down after 2 minutes with a coffee maker.”
batteryskills.com — Yeti 300 review · 2026 · [mixed]
- B4
“A modern LFP (not NMC) rugged compact unit, though at $349.95 the price stings for the capacity.”
the-gadgeteer.com — Yeti 300 review · 2026 · [mixed]
Research compiled October 11, 2026.
Who Should Buy Which
Buy the AC50B if you…
- →The CPAP user who needs the machine still running when the alarm goes off. The AC50B finishes that night with 61Wh to spare; the Yeti doesn't finish it.
- →Anyone whose list includes a load between 350W and 700W. It trips the Yeti's inverter and runs on the AC50B's.
- →The buyer who'd rather pay $49 more once than ration power every night: 448Wh against 297Wh, and the lower cost per watt-hour of capacity of the two.
Buy the Yeti 300 if you…
- →The laptop-and-tent camper who charges over USB-C and nothing else. 100W against 65W is a difference you feel on a big laptop every day.
- →Whoever leaves it in a truck bed or a boat locker: one review credits it with IP54 sealing and rubberized cornersB2, and it's the cheaper and lighter of the two.
- →The afternoon-at-the-park user running about 100Wh of gear. Both handle it, and the Yeti does it for less money and 1.1 lb less in the bag.
If neither fits
If the job is an eight-hour outage or a weekend of camping, close this tab cheerfully: those loads want 1,645Wh and 2,100Wh, and the AC50B covers a quarter or less of either. Shop a station sized to the job, because choosing carefully between two batteries that small doesn't fix the shortfall.
The Bottom Line
Take the AC50B. It costs more, and it spends the difference on the one thing a small station is bought for: still running at the end of the night. Half again the battery, twice the inverter, and the only finish of the two on the CPAP row.
The Yeti 300 is a good small battery: a tougher shell per one reviewB2, a faster refill, a better USB-C port, a second AC outlet and a lower price. If your day is a laptop and a phone outdoors, buy it and pocket the difference. If anything plugs into the AC socket and has to last till morning, pay the extra and get the AC50B.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI AC50B worth the extra money over the Goal Zero Yeti 300?
Yes, if anything you run plugs into the AC socket. The extra $49 buys 151Wh more capacity and twice the continuous output, 700W against 350W, and it's the difference between finishing a CPAP night and not. If your whole load is USB-C gear, the Yeti's 100W port and lower price make it the better buy.
Which one can run a CPAP all night?
The AC50B. A CPAP overnight comes to about 320Wh in our model, and after the 85% usable derate the AC50B has 381Wh against the Yeti 300's 252Wh. The AC50B finishes with 61Wh spare; the Yeti comes up 68Wh short. BLUETTI publishes a 45dB figure for the AC50B, its own rating rather than a bench reading, and Goal Zero publishes none for the Yeti.
Does the Yeti 300 last longer than the AC50B?
Its cells are rated for more cycles, 4,000 against 3,000, but each cycle is smaller. Over its rated life the Yeti delivers 1,188 kWh to the AC50B's 1,344 kWh, and per lifetime kilowatt-hour the two land within a cent of each other. Either lasts decades on weekend use, so cycle life shouldn't decide this.
How fast does each one recharge?
The Yeti 300, as shipped: one review records 0-100% in 50 minutes from the wall. The AC50B takes about 3 hours as standard, or 1.25 hours with the optional 480W Turbo charger. Both accept 200W of solar, so at full input the smaller Yeti refills first.
Can either one run a coffee maker or a kettle?
Not well. The Yeti 300's 350W continuous rating is too little for most heating appliances, and one reviewer saw it shut down two minutes into a coffee maker. The AC50B's Power Lifting mode runs a resistive appliance rated up to 1,000W by feeding it less power than it asks for, so it works, slowly, and 448Wh doesn't last long at that kind of draw.
Where to buy
BLUETTI AC50BPick
$399.00
$399.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
Goal Zero Yeti 300
$349.95
$349.95 · direct from Goal Zero
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.