Head-to-head test
Anker SOLIX C300X vs Goal Zero Yeti 500
Priced within four cents a watt-hour of each other, this was never a value fight — it comes down to whether the Yeti 500's extra 211 watt-hours and stronger inverter are worth $200 and seven more pounds than the C300X.
Full profiles: Anker SOLIX C300X → · Goal Zero Yeti 500 →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
Spec deltas
These two cost almost exactly the same by the watt-hour: $1.04 for the Anker SOLIX C300X, $1.00 for the Goal Zero Yeti 500. That quietly settles what the comparison is really about. You're paying the same rate for energy either way, so this isn't a value fight, it's a sizing decision. Do you want 288 watt-hours in the lighter box, or 499 in the heavier one for $200 more?
The Yeti 500 is the more capable unit, and unless you're sure your needs are small, it's the one to buy. It holds 73% more energy, runs a 500-watt inverter to the Anker's 300, takes twice the solar input, and it's the only one of the two that finishes a CPAP night. Neither can be expanded later, so buying the larger fixed ceiling is the safer move when you're not certain what you'll ask of it.
But the C300X isn't the consolation prize. It's seven pounds lighter, it's the only one here that publishes a noise figure, and it's the cheaper of the two, and for phones, a laptop, and an afternoon away from the grid, that's the smarter box. One question decides it: do you need what the Yeti's extra 211 watt-hours and stronger inverter buy? If yes, pay up and carry the weight. If not, the Anker does the job for less and rides in one hand.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
Because the rate is the same, the only things you're actually deciding between are watt-hours and pounds: the Yeti sells you 211 more watt-hours at the going rate and charges for them in weight rather than in a worse deal, about seven extra pounds on every carry.
Anker C300X: $300 for 288Wh ($1.04/Wh)Yeti 500: $500 for 499Wh ($1.00/Wh)weights are 9 lb (C300X) and 16.1 lb (Yeti 500)
Why it mattersIf your loads fit inside the Anker's capacity, don't pay for or haul watt-hours you won't use; if they don't, the Yeti's headroom is priced fairly, not at a premium.
The CPAP buyer wants two things at once, a unit that lasts till morning and one that stays quiet where their head is all night, and neither box delivers both with certainty: the Anker is measured-quiet but comes up short, the Yeti goes the distance but ships without a noise number to trust.
CPAP Overnight needs 320WhC300X usable energy is 245Wh (288Wh derated 15%)Yeti 500 usable energy is 424WhC300X publishes 25dB; Yeti 500 publishes no noise figure
Why it mattersIf you run a humidified, heated CPAP through the night, take the Yeti for the capacity and vet its noise from hands-on reports; if your draw is genuinely light, the Anker's documented quiet can still win.
They're tuned for opposite ends of portable power: the Anker is built to push small, fast DC loads, where a 140W USB-C port charges or runs a laptop straight off the port, and the Yeti is built to hold heavier AC appliances the Anker's inverter can only briefly touch.
C300X: 300W continuous, 600W surge, 140W USB-CYeti 500: 500W continuous, 1,000W surge, 100W USB-Cthe Tailgate scenario asks a unit to hold a 400W draw
Why it mattersBuyers whose heavy hitters are USB-C laptops, tablets, and cameras are better served by the Anker's port; buyers running a 400-to-500-watt AC appliance need the Yeti, because the C300X simply won't sustain it.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The two land within four cents of each other per watt-hour ($1.04 vs $1.00), so the money question isn't which is the better value, it's how many watt-hours you're buying.
cost / lifetime kWh
Cost per watt-hour is where this matchup stops being about money. The two come out within four cents of each other per watt-hour, the same rate inside a rounding error, so neither is the value pick. Whatever you spend, you're getting essentially the same energy per dollar; you're just choosing how much of it to buy.
There's a longer-run number that seems to favor the Yeti, about 25 cents per lifetime kilowatt-hour against the Anker's 35, because it pairs bigger cells with a 4,000-cycle rating instead of 3,000. Don't over-weight it. That edge comes from the Yeti simply being a larger, longer-cycling battery, not from being a shrewder buy, and at weekend use both units last decades past the point their own electronics will. Buy the Yeti for capacity you'll use, not for a lifetime energy bill you'll never run up.
Your Life, Your Pick
Selected because: The capacity gap only turns into a decision in specific jobs: a 320Wh CPAP night the Yeti 500 finishes and the C300X doesn't, and a 100Wh afternoon off-grid both handle easily.
Start with what both units fail, because it's most of the list. A camping weekend wants 2,100Wh, an eight-hour blackout 1,645Wh, a van-life day 4,685Wh, and the larger of these two covers about a quarter of that blackout at best. If any of those is your real job, neither unit is the answer; you want a station several times this size.
Where they actually split is smaller. A 100Wh afternoon off-grid is the job small stations are built for, and both clear it easily, the Anker at 41% used, the Yeti at 24%, so weight and price decide it, not leftover watt-hours. Step up to a 320Wh CPAP night and the picture changes: the Yeti finishes with room to spare, the Anker stops short of morning. That single scenario is the clearest line between them, and it's the one to check your own load against before you choose.
Portability & Form Factor
Selected because: Nine pounds against 16.1 is the C300X's clearest everyday edge, and it's exactly what the Yeti 500's extra capacity costs you to carry.
weight
Nine pounds against 16.1 is the difference between a one-hand grab and a two-hand lift. The Anker is a bag item you stop noticing; the Yeti is a deliberate pick-up you plan around, the kind of weight you set down before you open a car door. Seven pounds doesn't sound like much until it's the thing you carry from the house to the campsite to the tailgate and back.
That gap only matters if the unit moves. If it lives in one spot, parked by the router as a backup or sitting under a desk, you'll never feel it, and the Yeti's extra capacity is pure upside. One reviewer put dozens of trunk loads on the C300X and reported no wear or flex in the handleA12, so the lighter box is built to keep being carried. Decide honestly whether this thing travels, because that answer moves the whole verdict.
What the Specs Don't Tell You
Selected because: Once capacity and price are settled, the tiebreakers are published noise (25dB vs none), UPS class (10ms vs 20ms), and cycle life (3,000 vs 4,000).
rated cycles
The noise column is the one that should move a bedroom buyer. The Anker publishes 25dB and reviewers found it near-silent at its rated 300WA4, though push it past that, onto a 500W tool, and the fan gets clearly audibleA11. The Yeti publishes no noise figure at all. That's not proof it's louder, but it's nothing to hold it to, and for a CPAP or an apartment, one published number beats none.
Two smaller tiebreakers, honestly weighted. The Anker's UPS is rated 10ms to the Yeti's 20ms, both fine for a router, the Anker the safer paper spec for a desktop PC, and one reviewer watched it ride through a pulled plug with a computer, router, and CPAP still runningA7. On cycle life the Yeti leads, 4,000 rated cycles to 3,000, but that's a lifespan neither of you will reach, and the warranties are identical at five years, so neither is a reason to choose.
Strengths & trade-offs
Anker SOLIX C300X
Strengths
- +Costs $200 less
- +Lighter by 7.1 lb
Trade-offs
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Yeti 500's 4,000, so it wears out sooner.
Goal Zero Yeti 500
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$200) than the SOLIX C300X.
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 SOLIX C300X comes up 1,855Wh short (about 12% covered), the Yeti 500 1,676Wh (20%). 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 of these is a blackout unit. Eight hours of fridge-and-essentials is roughly 1,645Wh, and the bigger of the two covers about a quarter of it before it's empty. Between just these, you're choosing which one dies first. The honest move is to skip both and buy a station several times this size.
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
Yeti 500
A CPAP night runs about 320Wh in this profile, and that's the line between these two. The Yeti 500 finishes with room to spare; the C300X stops short of morning. The nuance runs the other way on noise: the Anker is the one with a published 25dB figure and the Yeti won't commit to a number, so if your machine draws light you might still prefer the quiet Anker. For a full humidified night, though, the Yeti is the only one of the two that makes it.
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 SOLIX C300X comes up 665Wh short (about 27% covered), the Yeti 500 486Wh (47%). 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
The SOLIX C300X can start the 400W peak but not hold it — 600W of surge gets it going, then the 300W continuous rating takes over, so capacity never gets a say. This is the wrong size of unit for the job rather than a close call. The Yeti 500 doesn't have the energy either — 424Wh usable against 670Wh, 246Wh short — so neither route works.
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 SOLIX C300X comes up 4,440Wh short (about 5% covered), the Yeti 500 4,261Wh (9%). 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 SOLIX C300X finishes at 41% used, the Yeti 500 at 24%. At this size the decider is what rides in the bag, then price, not the leftover watt-hours: the Yeti 500 weighs 16.1 lbs, and at 9 lbs the SOLIX C300X is the one you'll be glad you brought.
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: Yeti 500 runs 2.1h vs 1.2h.
$499.95 list · direct from Goal Zero
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 0–28.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–5.7hHigh-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 30, 2026
Verdict: the Goal Zero Yeti 500
Buy the Yeti 500 if there's any real chance your loads climb past the roughly 245 usable watt-hours the Anker holds. It carries 499Wh to the C300X's 288, runs a 500W inverter against 300W, takes twice the solar input, and it's the only one of the two that finishes a 320Wh CPAP night — all at essentially the same price per watt-hour, and with no way to add capacity to either one later. Buy the C300X if you want the lightest, quietest, cheapest box for phones, a laptop, and an afternoon off-grid: it's seven pounds lighter, it's the only one with a published noise figure, its USB-C is faster, and it leaves $200 in your pocket. It's genuinely close and it turns on one thing, capacity. If you're unsure, take the Yeti's headroom; if you're certain your needs are small, take the savings.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 30, 2026. The links below open Anker's and Goal Zero's current prices.
$499.95 · direct from Goal Zero
Last checked 16 days ago. Prices move — check before you buy.
or check the SOLIX C300X price$299.99 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated August 30, 2026
Black Friday · 38 days out
Prices to beat:SOLIX C300X $300Yeti 500 $500
We have never seen either discounted, so any real cut would be a first.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Solar Generator.
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, SOLIX C300X rates 4.6/5 (74th percentile of 24 Personal-class units), and Yeti 500 rates 4.5/5 (70th percentile of 24 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.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The SOLIX C300X is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The Yeti 500 is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Worth saying because the per-dollar framing can suggest otherwise: the SOLIX C300X works out at 16.7 years of cover per $1,000 spent against the Yeti 500's 10, but that spread is the price gap, not the terms.
Cycles you'll never count
The Yeti 500's 4,000 cycles beat the C300X's 3,000, but do the division: at weekend use that's 38 years against 29. Both will outlive their own inverters and screens long before the cells give out, so this is a tiebreaker, not a reason to pay more. The Yeti earns its price on capacity and output, not on a lifespan you won't live to test.
The Yeti's missing number
Goal Zero doesn't publish a noise figure for the Yeti 500. That isn't evidence it's loud, but it leaves you nothing to hold it to, while the C300X at least commits to 25dB on the spec sheet. For a bedroom or a CPAP, that missing number is the one real soft spot in the Yeti's case, and it's the kind of thing to settle by listening, not by reading the table.
Full record above — the Test Desk pick is the Yeti 500.
Check Yeti 500 price →or check the SOLIX C300X priceOwnership 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
The SOLIX C300X is cheaper to buy, but the Yeti 500 is cheaper to own. At $0.25/kWh over its lifetime vs $0.35/kWh, the Yeti 500's higher cycle life and capacity make each dollar go further over the years.
Brand trust
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
US-based, and Anker's consumer-electronics name still carries real weight, but SOLIX-specific support has been sliding, with reports of AI-driven agents returning canned answers and awkward hazmat return logistics on heavier units.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Parent-brand trust and InfiniPower cells built for long cycle life; across the catalog Anker's mid and large stations are among the stronger per-watt-hour buys.
Worth knowing
Firmware updates have quietly removed features before, and the expansion ecosystem trails EcoFlow's, though neither point bites here, since this unit doesn't expand anyway.
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
A US company out of Salt Lake City, owned by NRG Energy, with a premium-support reputation that 2025-26 reports say has slipped: long waits, unanswered email, tickets sitting for weeks.
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 pioneer of portable power, with the deepest heritage of any brand here and ruggedized, weather-resistant designs tied into a Yeti-Ready ecosystem of coolers, lights, and vehicle kits.
Worth knowing
Usually the priciest brand per watt-hour, though on this page it's actually the marginally cheaper energy at $1.00/Wh. Goal Zero also recently shuttered its official community forums, which stung long-time owners.
Analyst note
Two US-facing brands whose support reputations are both drifting down from a high starting point, Anker from famously no-hassle replacements, Goal Zero from a premium standard. Neither app is a wreck (4.5 and 4.4 stars), but Goal Zero's recent reviews skew toward connectivity and stability complaints. Decide on the hardware in front of you, not on a service edge neither brand still clearly holds.
Growth path
SOLIX C300X
FIXED CAPACITYFixed at 288Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 100W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Yeti 500
FIXED CAPACITYFixed at 499Wh, 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 Yeti 500 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.
Anker SOLIX C300X
The C300X has real hands-on coverage, and most of it is good. Two independent reviews found it near-silent at its 300W ratingA4, with the fan only becoming noticeable when pushed onto a 500W overloadA11, quiet where you'll actually use it. Its UPS works as advertised: a reviewer pulled the wall plug with a computer, router, modem, and CPAP all running and nothing so much as flickeredA7. Wall charging matched spec too, roughly 80% in under an hour and full in about an hour and fiveA8, and a 60W laptop ran a little over four hours before hitting 20%A9.
The gripes cluster in two places. The app-and-charging pipeline drew the most concrete complaints: Bluetooth pairing that drops and blocks monitoringA1, and one owner whose unit refused to charge past 25%A2. There's also a documented quirk worth knowing, the C300X shuts itself off when charging very low-draw gear like earbuds or a smartwatch, an intentional power-saving cutoff rather than a fault, but one that surprises peopleA3. And the 100W solar ceiling drew a specific wish for 200W, with Anker's own panels called priceyA6.
“The unit was confirmed to shut itself off when charging very low-draw devices like headphones or a smartwatch — an intended power-saving cutoff rather than a defect, but one that catches owners off guard.”
Sources
teqclub.com · thesolarlab.com · backuppowerhub.com
Goal Zero Yeti 500
Field data on the Yeti 500 is thin, and that's the honest headline. This is the newer LiFePO4 version, and a deep well of long-term owner reports hasn't formed yetB0. What exists leans on the battery's endurance story: the 4,000-cycle LFP rating implies well over a decade of daily use before it settles to 80% capacityB1, and one 2026 reviewer logged 180-plus cycles with minimal degradation, which is early but consistent with the ratingB4.
Take the headline outage claim with the right label. Goal Zero's own site frames the unit as backup that can run a full-size fridge for up to six hoursB2, but that's a manufacturer figure, not a field result, so treat it as a spec to verify rather than a review to trust. And mind the name: the older NMC Yeti 500X is a different, roughly-500-cycle battery whose reviews don't transfer to this oneB0. The Yeti's case here rests more on its spec sheet and Goal Zero's pedigree than on a stack of owner nights.
“The Yeti 500's LiFePO4 battery is rated for 4,000+ cycles, meaning daily use for over 10 years (to 80% capacity at 75F).”
Sources
goalzero.com · rei.com · propaneva.com · portablepowernerd.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
- Independent hands-on reviewers found the C300X near-silent at its rated 300W load, though one test noted the fan becoming noticeably audible under a heavier transient/overload draw. [SOLIX C300X · 2 entries]
- AC charging and UPS switchover both performed at or better than spec in hands-on testing — fast wall recharge and an imperceptible transfer that kept a computer, router, and CPAP running through a pulled plug. [SOLIX C300X · 2 entries]
- The most concrete owner-reported defects both sit in the app/charging pipeline: a Bluetooth pairing dropout that blocks monitoring, and a specific report of the battery refusing to charge past 25%. [SOLIX C300X · 2 entries]
- High 4,000+ cycle LFP rating and outage-backup capability (including running a fridge for hours) are the standout points. [Yeti 500 · 2 entries]
- A1
“Users reported trouble connecting the C300X to the Anker app, which blocked monitoring power usage and changing settings; re-pairing by "forgetting" the device in Bluetooth settings and reconnecting through the app usually fixed it.”
teqclub.com — "Solving Common Anker C300X Problems" · unknown · [negative]
- A2
“My Anker solix c300x Portable Power Station will not accept charge more than 25%.”
teqclub.com — "Solving Common Anker C300X Problems" (quoted owner comment) · unknown · [negative]
- A3
“The unit was confirmed to shut itself off when charging very low-draw devices like headphones or a smartwatch — an intended power-saving cutoff rather than a defect, but one that catches owners off guard.”
teqclub.com — "Solving Common Anker C300X Problems" · unknown · [mixed]
- A4
“This unit is impressively quiet. Even with the internal fans running when we pushed it to its limits, the C300X makes virtually no noise.”
thesolarlab.com — "Anker C300X Power Station Review" · 2026 · [positive]
- A6
“The 100W solar input ceiling felt too low — the reviewer wished for 200W support — and called Anker's own solar panels expensive; a solar panel recognition delay was also noted on initial connection.”
thesolarlab.com — "Anker C300X Power Station Review" · 2026 · [negative]
- A7
“Pulling the AC plug mid-use while a computer, router, modem, and CPAP machine were running, the computer stayed on without interruption — no screen flicker, no system hiccup.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [positive]
- A8
“AC charging to 80% took 49 minutes in testing, matching the advertised claim; full charge landed at 65 minutes. A 100W solar panel took 3 hours 15 minutes, and 12V car charging took about 6.5 hours.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [positive]
- A9
“A 60W laptop ran 4 hours 15 minutes before hitting 20% battery; a 50W mini fridge ran 5 hours 30 minutes continuous; the unit was good for about 22 full phone charges or 9 drone-battery cycles per depletion.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [positive]
- A11
“Under a 500W circular saw load, the fan ramped up noticeably — a contrast to how quiet the unit stays at its rated 300W.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [mixed]
- A12
“The C300X feels premium in a way many budget power stations don't; the carry handle showed no wear or flex after dozens of trunk loads.”
backuppowerhub.com — "Anker SOLIX C300X Review" · 2026 · [positive]
- B1
“The Yeti 500's LiFePO4 battery is rated for 4,000+ cycles, meaning daily use for over 10 years (to 80% capacity at 75F).”
goalzero.com / rei.com — Yeti 500 LFP · 2026 · [positive]
- B2
“Acts as a backup power supply when the grid drops — you can plug a full-size refrigerator directly in for up to six hours of runtime to prevent food waste.”
goalzero.com — Yeti 500 backup · 2026 · [positive]
- B4
“One 2026 reviewer completed 180+ charge/discharge cycles with minimal observed degradation.”
portablepowernerd.com — Yeti 500 long-term review · 2026 · [positive]
Research compiled August 30, 2026.
Who Should Buy Which
Buy the SOLIX C300X if you…
- →The traveler who wants the lightest, quietest box for phones, a tablet, a laptop, and an afternoon off-grid: nine pounds, a published 25dB, and it disappears into a bagA4.
- →The desk worker who wants a UPS for a desktop PC and router, with a 10ms switchover a reviewer confirmed by yanking the wall plug mid-sessionA7, plus a 140W USB-C port that can run a laptop straight off the unit.
- →Anyone who'd rather spend $300 than $500 and whose loads honestly fit inside the Anker's roughly 245 usable watt-hours.
Buy the Yeti 500 if you…
- →The CPAP-through-an-outage sleeper, since it's the only one of the two that finishes the night, though check hands-on noise reports first, because Goal Zero publishes no figure.
- →The person running a heavier AC load now and then: a 400-to-500-watt tool or a full-size fridge for a few hours, where the Anker's 300W inverter simply taps out.
- →The buyer who wants the most capacity and cycles available at about a dollar a watt-hour, doesn't mind the extra weight, and knows that neither unit can be grown later, so it's worth buying big up front.
If neither fits
If your real target is a full 8-hour blackout (1,645Wh) or a camping weekend (2,100Wh), both of these fall short by more than they hold, so close the tab and shop a full-size station several times this capacity. And at the other end, if all you ever top up is a phone and a headlamp, even the C300X is more than you need; a good power bank weighs and costs a fraction as much and covers it.
The Bottom Line
You're paying the same rate per watt-hour either way, so this was never a value call, it's a sizing one. The Yeti 500 gives you a much larger battery, a stronger inverter, twice the solar input, and the only CPAP-capable night of the two, and because neither unit can be expanded later, that bigger fixed ceiling is the safer bet whenever you're not sure what you'll ask of it. That's why it's the pick for most buyers who land here.
But the Anker earns its place for the buyer who knows their needs are small: it's seven pounds lighter, it's the only one that publishes a noise number, its USB-C is faster, and it costs less. Buy the Yeti 500 for the headroom. Buy the C300X for the carry. If you can't decide, ask the one question that settles it: is your heaviest realistic night bigger than what the Anker holds?
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Goal Zero Yeti 500 worth $200 more than the Anker C300X?
Only if you need the extra capacity or output, because you're not overpaying for it: the two cost almost the same per watt-hour ($1.00 vs $1.04). That $200 buys you 211 more watt-hours and a 500W inverter instead of 300W. If your loads fit inside the Anker's roughly 245 usable watt-hours, it buys headroom you won't use.
Can the Anker C300X run a CPAP all night?
For a light, no-humidifier CPAP, often yes, but a heated, humidified machine can push an overnight run toward 320Wh, and the C300X's 245 usable watt-hours leave it about 75Wh short of morning. The Yeti 500 covers that same night with 104Wh to spare. If you run humidified and heated, size up to the Yeti; if you run bare, the Anker can carry it.
Which one is quieter?
The C300X is the only one with a number: it's rated 25dB, and reviewers call it near-silent at its 300W rating, though the fan gets clearly audible if you overload it past that. Goal Zero doesn't publish a noise spec for the Yeti 500, so there's nothing to compare on paper. If quiet matters, go by hands-on reports before buying.
Can I add more battery to either one later?
No. Both are sealed at their rated capacity, 288Wh for the C300X and 499Wh for the Yeti 500, with no expansion batteries and no add-ons. That's why capacity is the whole decision here: buy what you need up front, and if you might outgrow it, start with the Yeti's larger ceiling or move up a size class entirely.
Which lasts longer?
The Yeti 500 is rated for 4,000 charge cycles to the C300X's 3,000, about 1,996 kWh of lifetime energy against 864. But at twice-a-week use that's 38 years versus 29, so both will outlast their own inverters and screens long before the cells wear out. Treat cycle life as a tiebreaker, not a dealbreaker.
Where to buy
Anker SOLIX C300X
$299.99
$299.99 · direct from Anker
Last checked 16 days ago. Prices move — check before you buy.
Goal Zero Yeti 500Pick
$499.95
$499.95 · direct from Goal Zero
Last checked 16 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.