Head-to-head test
BLUETTI AC50B vs Goal Zero Yeti 300
One of these gets a CPAP to morning and the other quits before your alarm, and the one that quits is the one that costs more.
Full profiles: BLUETTI AC50B → · Goal Zero Yeti 300 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
$399.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
$349.95 · direct from Goal Zero
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The Goal Zero Yeti 300 costs $350 and holds 297Wh. The BLUETTI AC50B costs $279 and holds 448Wh. You're being asked to pay $71 more for 151Wh less, and that's before the part where the expensive one runs half the continuous wattage.
The Yeti has a real case and it deserves to be stated properly. Its cell is rated for 4,000 cycles against the AC50B's 3,000. It's sealed to IP54 with rubberized corners and a handle that was engineered rather than molded on, and it goes 0-100% in 50 minutes off the wallB2. Its USB-C port does 100W where the AC50B stops at 65W. That is a genuinely nice object.
None of it survives contact with an outlet. The AC50B runs 700W continuous with a 1,000W surge against the Yeti's 350W and 600W, and it has half again the energy to feed them. Of the six loads we model, exactly one gets finished by either unit, and the AC50B is the one that finishes it.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
Both units list a 20ms switchover, so at the instant the grid drops they behave identically. This was never a matchup where one is the UPS and the other isn't. The whole question is what's happening four hours later at 3 a.m.: the AC50B gets to sunrise having spent 84% of what it had, while the Yeti needs 127% of what it has, which is a polite way of saying the machine beside your head stops working while you're asleep.
AC50B: 448Wh rated capacityYeti 300: 297Wh rated capacityA CPAP overnight asks for about 320WhRoughly 85% of rated capacity survives the inverter
Why it mattersIf a CPAP is anywhere in your reason for buying, this comparison is already settled.
rated cycles
Divide by price and the durability advantage inverts completely. Twenty-one cents per lifetime kilowatt-hour for the AC50B, twenty-nine for the Yeti. The one spec on the sheet that's supposed to justify the premium is the spec the premium erases.
AC50B: 3,000 cycles at 448WhYeti 300: 4,000 cycles at 297WhAC50B costs $279; Yeti 300 costs $350
Why it mattersNobody should pay for a cycle count without multiplying it by capacity first.
weight
Every one of those advantages lives outside the AC outlet. If the whole job is a laptop, a camera battery and a phone, in weather, the Yeti is the right box and its price is defensible. Plug anything into the AC socket and it's running half the continuous wattage of the cheaper unit, and ruggedness doesn't move that number.
Yeti 300: 100W USB-C, 13.7 lb, IP54 sealing and rubberized cornersB2AC50B: 65W USB-C, 14.8 lbYeti 300 recharges 0-100% in 50 minutesB2AC50B takes about 3 hours from the wall, and 1.25 hours only with the optional 480W Turbo chargerA3
Why it mattersTake the Yeti if you charge over USB-C and the unit lives outdoors; the case for it evaporates at the first wall plug.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: 448Wh and 700W against 297Wh and 350W, for $71 less — capacity and inverter both fall on the same side.
continuous output
The cheaper box is the one that starts things. 700W continuous with a 1,000W surge on the AC50B against 350W and 600W on the Yeti 300, and that gap isn't about lasting longer. It's about whether the appliance comes on at all. A load the Yeti refuses is a load the AC50B simply runs.
Capacity points the same direction, which is what makes this easy. Normally you trade: more power for less runtime, or a lighter unit that can't start anything. Here the bigger battery and the bigger inverter are the same purchase, and that purchase is also the cheaper one. Size either unit for what you need on day one, because what's in the box is what you own for the life of it.
Your Life, Your Pick
Selected because: A CPAP overnight is the only one of six modeled loads either unit finishes, and only the AC50B finishes it.
Five of the six modeled loads come back 'neither,' and that's the honest headline: these are small batteries. A weekend of camping wants 2,100Wh. An eight-hour blackout wants 1,645Wh. Even a tailgate wants 670Wh. If any of those is your actual job, both of these are the wrong size and your money is better spent on capacity than on picking between them.
The exception is the one that decides the page. A CPAP overnight asks for 320Wh, which the AC50B covers and the Yeti doesn't. And in the tailgate, where neither finishes, only the AC50B can even start the peak load. When these scenarios do separate the two units, they separate them the same way every time.
Lifetime Value
Selected because: The Yeti 300 runs 4,000 cycles to the AC50B's 3,000 and still delivers less total energy for more money.
cost / lifetime kWh
The unit that's supposed to outlive the other is the one that costs more per unit of energy it will ever deliver. The Yeti's extra thousand cycles are real, and they're spent on a battery holding a third less each time it runs one.
Then there's the timescale nobody talks about. On weekend use the AC50B's cells last 28.8 years and the Yeti's 38.5. Both are decades past the five-year warranty they ship with, and both will outlast your interest in owning a small battery. The durability spec is theater for both of them. The price isn't.
Portability & Form Factor
Selected because: 13.7 lb and a 100W USB-C port against 14.8 lb and 65W — the Yeti's genuine advantages, stated fairly.
weight
1.1 lb is the difference, which is to say there isn't one. Both are one-hand carries, and the AC50B is still well under BLUETTI's own AC70 at 21.4 lbA2. Weight is not deciding this.
What the Yeti actually wins here is weather. IP54 sealing, rubberized corners and a handle built to be grabbedB2 make it the one you'd leave in a truck bed through a storm without thinking about it. Both take 200W of solar, so a day in the sun treats them identically. The Yeti is the better object to abuse. The AC50B is the better object to use.
What the Specs Don't Tell You
Selected because: BLUETTI publishes 45 dB for the AC50B; Goal Zero publishes no noise figure at all for the Yeti 300.
rated cycles
BLUETTI rates the AC50B at 45 dB under load. Goal Zero publishes nothing for the Yeti 300. A missing number is not evidence of a loud fan, but on the exact axis that decides this matchup — a battery sitting next to a bed all night — you can hold one manufacturer to a figure and the other to nothing at all.
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
An eight-hour outage wants 1,645Wh, and neither of these is remotely close, so don't buy either one as your blackout plan. Bought honestly, they're the thing that keeps the phones, the router and one lamp alive while the outage happens around you. If the fridge is the actual job, you need a unit built to hold that number, and neither of these was.
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
About 320Wh gets a CPAP from lights-out to the alarm. After inverter losses the AC50B has roughly 380Wh on hand and finishes the night having used 84% of it; the Yeti 300 has about 252Wh and would need 127% of that. One of these gets you to morning.
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 box finishes a tailgate — the party asks for 670Wh and neither has that much to give. The split is in what they'll start rather than how long they'll last: the AC50B's 1,000W surge takes the peak load and the Yeti 300's 600W doesn't. Running a battery flat is a scheduling problem. Not starting at all is a different kind of afternoon.
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
This is the job small stations are actually for, and both do it: the AC50B finishes at 26% used, the Yeti 300 at 40%. At this size the decider is what rides in the bag — 13.7 lbs for the Yeti 300 against 14.8 for the AC50B — and price, not the leftover watt-hours.
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
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
August 2, 2026
Verdict: the AC50B, on Power Score margin
Buy the AC50B. It's $71 cheaper, holds 151Wh more, runs twice the continuous wattage, and it's the only one of the two that finishes any of the six loads we model — a CPAP overnight, which the Yeti 300 can't cover. The Yeti earns its keep in exactly three places: it's 1.1 lb lighter, its USB-C port delivers 100W to the AC50B's 65W, and it's sealed to IP54 with rubberized corners and a handle built to be grabbedB2. If you're buying a battery that lives in a truck bed and charges one big laptop, that's a real case and you should take it. If you're buying it to run things off an outlet, the cheaper box is also the bigger and stronger one, and no third factor is coming to rescue the price.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 2, 2026. The links below open BLUETTI's and Goal Zero's current prices.
$399.00 · direct from BLUETTI
Last checked 1 day 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 August 2, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Tailgating.
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 (76th percentile of 22 Personal-class units), and Yeti 300 rates 3.7/5 (24th percentile of 22 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 cycles of less
4,000 cycles beats 3,000 right up until you ask what a cycle is worth. The Yeti 300's cycle is 297Wh; the AC50B's is 448Wh. The longer-lived cell hands over less total energy across its entire life, because it's doing more laps of a shorter track — and it costs more to buy in the first place.
One brand published a number, one didn't
BLUETTI rates the AC50B at 45 dB under load. Goal Zero publishes no noise figure for the Yeti 300 at all. Silence in a spec sheet isn't proof of a loud fan, and it isn't an accusation. But on a unit people buy to sit beside a bed, one manufacturer has given you something to hold it to and the other hasn't.
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 ($0.3/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 desk is the real gamble in this purchase. It's email-first with China-timezone lag, and outcomes swing from efficient to weeks of runaround, sometimes ending in a discount on a new unit instead of a repair. Buying direct from BLUETTI rather than through a marketplace measurably improves the odds if something goes wrong.
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
Best-in-class capacity per dollar, the widest model range in the category, and an app rated 4.5/5 on both stores — the AC50B is the cheap end of a lineup that runs all the way to 2,764.8Wh 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 for years that was the entire argument for paying more. Wait times have stretched, email tickets can sit unaddressed for weeks, and the official community forums have been shut down. The premium is still in the price; the premium service is less reliably behind it.
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
The original name in portable power, US-based, with genuinely ruggedized weather-resistant builds and a Yeti-Ready ecosystem of coolers, lights and vehicle kits that nobody else quite matches.
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 pick its brand. BLUETTI's is inconsistent and Goal Zero's has slipped from the standard it used to set, which on a box in this price range means you should assume you're mostly on your own. Both carry five years of coverage, so the warranty isn't the differentiator — who answers the email is, and neither answer is comforting enough to change the hardware verdict.
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
Everything on record for the AC50B comes from reviewers rather than long-term ownersA1A2A3, so read the durability picture as unproven rather than proven good. What they agree on: at 14.8 lb it's a true one-hand carry, noticeably lighter than BLUETTI's own AC70 at 21.4 lbA2, and the 700W output with 1,000W Power Lifting handles more than a box this size looks like it shouldA1.
Charging is the honest weak spot. It's about 3 hours from the wall as shipped, and the 1.25-hour figure that gets quoted requires buying the 480W Turbo charger separately, which also gets it to 80% in 45 minutesA3. Budget for that accessory or plan around the three hours.
“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 cleanly along one line: the build is excellent and the battery is smallB1B2B3. IP54 sealing, rubberized corners and a handle that feels engineered show up everywhere, along with a 0-100% recharge in 50 minutesB2. That's the good half, and it's genuinely good.
The other half is less flattering. One reviewer measured 4 to 6 hours on a laptop or 20 to 30 phone charges, and watched the unit shut down two minutes into running a coffee makerB3; another called the price a sting for the capacity you getB4. This is bench experience rather than years of ownership, same caveat as the AC50B, but the shape of the complaint matches the spec sheet exactly.
“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, 2,500+ cycles, fast Turbo charging, and B80 expandability. [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]
- 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 August 2, 2026.
Who Should Buy Which
Buy the AC50B if you…
- →The person whose CPAP has to reach 6 a.m. — this is the only unit here that gets there, and BLUETTI at least publishes what it sounds like at 45 dB.
- →Anyone with a 500W item on their list. 700W continuous with a 1,000W surge starts things the Yeti's 350W won't touch.
- →The buyer who wants the cheapest LFP box that isn't a toy: $279, 448Wh, five-year warranty, and the lowest cost per kilowatt-hour over its life of the two.
Buy the Yeti 300 if you…
- →The laptop-and-a-tent buyer who charges over USB-C and nothing else. 100W against 65W is a real, daily difference on a big laptop.
- →The person leaving it in a truck bed in the rain. IP54 sealing and rubberized cornersB2 are worth paying for if the unit's life is outdoors.
- →Whoever needs it full again between two uses on the same day, without buying an accessory: 0-100% in 50 minutes off the wallB2.
If neither fits
If you're trying to carry an eight-hour outage or a full weekend of camping, close this page — those loads want 1,645Wh and 2,100Wh, and these hold 448Wh and 297Wh. Shop the size class that actually holds what you need, because no amount of choosing carefully between these two fixes being three or four times short.
The Bottom Line
Take the AC50B. The one place these two genuinely separate is the place nobody wants to get wrong: a CPAP overnight, where the cheaper unit reaches morning and the expensive one doesn't. Everything else on the page points the same direction — more capacity, twice the output, a lower cost per unit of energy across its whole life, for less money up front.
The Yeti 300 isn't a bad battery. It's a well-sealed, well-built small one with a fast charger and a better USB-C portB2, and if that sentence describes your bag, buy it and don't look back. It just isn't a $71 upgrade over a box that holds more and does more. Get the AC50B, size it honestly, and don't ask either of these to carry an eight-hour outage.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Goal Zero Yeti 300 worth $71 more than the BLUETTI AC50B?
For most buyers, no. The extra money buys 151Wh less capacity and half the continuous output, and it doesn't buy a faster switchover either — both list 20ms. The Yeti earns the premium in one narrow case: you charge over USB-C at 100W, the unit lives outside in weather, and you want it back to full in 50 minutes without an accessory charger.
Which one can run a CPAP through the night?
The AC50B. A CPAP overnight comes to about 320Wh, and after inverter losses the AC50B has roughly 380Wh to give against the Yeti 300's 252Wh. The AC50B ends the night with headroom; the Yeti runs out before your alarm. If you're sleeping beside it, note that BLUETTI publishes a 45 dB figure for the AC50B and Goal Zero publishes no noise figure for the Yeti 300.
Can either of these work as a UPS for a router or a desktop?
Both list a 20ms switchover, so on that spec it's a dead heat and you should decide on something else. That something else is capacity and output: the AC50B has half again the energy and twice the continuous watts, so it carries more gear for longer once it's actually running on battery. Neither is sized for a long outage — an eight-hour blackout wants 1,645Wh.
How fast does each one recharge?
The Yeti 300 wins this outright as shipped: 0-100% in 50 minutes from the wall. The AC50B takes about 3 hours in the box, dropping to 1.25 hours (and 0-80% in 45 minutes) only if you buy the optional 480W Turbo charger. Both accept 200W of solar, so on panels they refill at the same rate and the smaller Yeti finishes first.
Why does the smaller Goal Zero cost more than the bigger BLUETTI?
Brand position, mostly. Goal Zero prices at the premium end of the category and BLUETTI at the value end, and the Yeti 300's build quality is real — IP54, rubberized corners, a solid handle. Historically the Goal Zero premium also bought US-based support, which is a weaker argument now: ticket waits have stretched and the official community forums have been shut down. Both units carry the same five-year warranty.
Where to buy
BLUETTI AC50BPick
$399.00
$399.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Goal Zero Yeti 300
$349.95
$349.95 · direct from Goal Zero
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.