Head-to-head test
Anker SOLIX C300 vs Goal Zero Yeti 500X
The cheaper box here is also the longer-lived one by a wide margin; the only thing the pricier Goal Zero buys you is a battery big enough to finish a single CPAP night the Anker comes up short on.
Full profiles: Anker SOLIX C300 → · Goal Zero Yeti 500X →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
$329.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
$499.95 · direct from Goal Zero
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The $330 Anker SOLIX C300 is the cheaper of these two and the one built to outlast the other several times over. Its pack is rated for 3,000 charge cycles against the $500 Goal Zero Yeti 500X's 500, so across a full lifetime its energy works out to $0.35 a kilowatt-hour against $2.01. Getting the less expensive unit and the longer-lived one in the same box is rare; here it's the whole story.
The Yeti 500X has one real advantage, and it's capacity: 497Wh to the C300's 288, an extra 209Wh in the tank. That surplus buys it exactly one win in our scenarios. It finishes a full overnight CPAP run the smaller C300 can't quite close out. If a single big overnight charge is your hard requirement, the bigger battery is the safer call.
But that's the whole case for the Yeti. It's heavier at 12.9 lbs against 9.1, charges over USB-C at less than half the speed (60W against the C300's 140), lists no UPS mode, publishes no noise figure, and carries a 2-year warranty to the C300's 5. Unless your one need is that single overnight charge, the C300 is the better unit and the cheaper one at the same time.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
So there's no pay-more-now-save-later trade to weigh here. The Yeti is the more expensive unit both on the shelf and per kilowatt-hour delivered, which is how it lands at $2.01 a lifetime kWh against the C300's $0.35.
SOLIX C300: $330, rated 3,000 cyclesYeti 500X: $500, rated 500 cycleslifetime energy 864 kWh (C300) vs 249 kWh (Yeti)
Why it mattersAnyone keeping this longer than a year or two should take the C300 and not lose sleep over the sticker.
Capacity
But it wins that night by spending a full cycle, and at 500 cycles a nightly CPAP user is down to 80% capacity in about a year and a half. The bigger battery wins the night and loses the year.
Yeti 500X: 497Wh (422Wh usable)SOLIX C300: 288Wh (245Wh usable)CPAP Overnight needs 320WhC300 falls 75Wh short; Yeti finishes with 102Wh to spareYeti rated 500 cycles, about 1.4 years of daily use
Why it mattersIf your one hard need is finishing a single CPAP night on battery, the Yeti does it; if you need that every night for years, size up to a larger long-life unit instead of burning this one down.
weight
The Yeti's extra 209Wh is capacity you won't touch on a day trip spent charging a laptop and a phone. You carry the weight and charge the laptop slower to haul energy you never reach.
SOLIX C300: 9.1 lbsYeti 500X: 12.9 lbsC300 USB-C 140W vs Yeti 60Wboth cap at 300W continuous; both clear the 100Wh afternoon-off-grid load easily
Why it mattersFor the person packing one into a bag for the afternoon, the lighter, faster-charging C300 is the better travel unit; the Yeti's capacity only earns its weight on that overnight run.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The sticker price hides the real gap: measured across each unit's full rated life, the C300's energy runs nearly six times cheaper than the Yeti's.
cost / lifetime kWh
The table's bottom line is that cycling is where the money is. The Yeti holds more energy per charge, but you don't buy a power station to charge it once. You buy it to run it down and fill it back up, over and over, and at 3,000 rated cycles against 500 the C300 is built to do that six times for every once the Yeti's pack is rated to. That's why the pricier unit is also the one you'll replace first: down to about 80% capacity inside a year and a half of daily use, against the better part of a decade for the C300. Same job, one lasts. The sticker had it backwards.
Your Life, Your Pick
Selected because: Both are small units, so this is where the Yeti's 497Wh earns its one clear win and where you see the loads neither can touch.
The scenario grid is mostly a wall of 'neither,' and that's the honest headline: at 288 and 497Wh, these are day-and-device units, not house-backup boxes. A weekend's camping runs about 2,100Wh and an eight-hour blackout about 1,645, and both units leave you well short, the C300 covering 12 to 15% of those loads and the Yeti 20 to 26%. If that's your list, the answer isn't either of these.
Where they actually split is the overnight CPAP. That night needs about 320Wh; the Yeti's 422Wh usable finishes with margin while the C300's 245 stops roughly 75Wh short before morning. It's the one place the bigger battery pays for itself. And for the small stuff both are truly sized for, an afternoon off-grid with a laptop and a phone, they're a coin flip on energy, so weight and price break the tie. Both of those favor the Anker.
Portability & Form Factor
Selected because: At 9.1 and 12.9 lbs these live in a bag, so weight and the 140W-against-60W USB-C gap decide the day-trip case.
weight
For units this size, the spec that actually travels with you is weight, and the C300 wins it going away: 9.1 lbs against 12.9. That near-four-pound gap is real in a backpack, and on a day trip where you'll charge a laptop and a phone, the Yeti's extra capacity is weight you carry without ever spending it.
The quieter edge is the USB-C port. The C300 delivers 140W over USB-C to the Yeti's 60, so a power-hungry laptop tops up better than twice as fast, and it does it straight off the port with no AC inverter idling in the background. For a setup that lives on USB-C, that's the difference between charging over a lunch stop and charging over the whole afternoon.
What the Specs Don't Tell You
Selected because: UPS mode, app control, a published noise number, warranty length: the smaller features almost all break toward the C300.
rated cycles
Line up the smaller features and they almost all point one way. The C300 lists a UPS mode, a switchover rated at no worse than 10ms, that the Yeti doesn't; it reports battery level and low-battery alerts to your phone where the Yeti wants you to walk over and read a panel; and it's warrantied for 5 years to the Yeti's 2. No single one of these settles a $170 decision. Stacked together they sketch the more finished product, and a Yeti spec sheet that keeps coming up blank in the columns where the C300 has an answer.
Strengths & trade-offs
Anker SOLIX C300
Strengths
- +Costs $170 less
- +Lighter by 3.8 lb
- +Longer warranty
- +Rated for 3,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
Goal Zero Yeti 500X
Strengths
- +Larger battery capacity
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$170) than the SOLIX C300.
- –Lacks smartphone app control for remote monitoring.
- –Shorter-lived battery — rated for 500 charge cycles vs the SOLIX C300's 3,000, so it wears out sooner.
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 C300 comes up 1,855Wh short (about 12% covered), the Yeti 500X 1,678Wh (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 box is your blackout plan. Eight hours of a fridge, some lights, and phones runs about 1,645Wh; the C300 covers roughly 15% of that and the Yeti roughly 26%. Both tap out long before the grid comes back. If riding out an outage is why you're shopping, both are the wrong size of unit.
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 500X
This is the Yeti's one clean win, and it's a real one. A humidifier-heavy CPAP night draws about 320Wh; the Yeti 500X has 422Wh usable and finishes with 102 to spare, while the C300's 245 usable runs out roughly 75Wh before morning. If you sleep on battery, the bigger tank is the safer bet for the night. Just know a nightly CPAP habit is 500 cycles deep in well under two years.
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 C300 comes up 665Wh short (about 27% covered), the Yeti 500X 488Wh (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 peak, not the capacity, ends this one for both. A 400W tailgate load is more than either unit's 300W continuous inverter will hold, so the Yeti's extra watt-hours never even get a vote. When the wall you hit is the inverter and not the battery, buying the bigger battery doesn't help.
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 C300 comes up 4,440Wh short (about 5% covered), the Yeti 500X 4,263Wh (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 C300 finishes at 41% used, the Yeti 500X at 24%. At this size the decider is what rides in the bag — 9.1 lbs for the SOLIX C300 against 12.9 for the Yeti 500X — 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: Yeti 500X runs 2.1h vs 1.2h.
$499.95 list · direct from Goal Zero
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 0–28.2hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–5.6hHigh-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 SOLIX C300
Take the C300. It's $170 less up front, lighter, faster over USB-C, warrantied more than twice as long, and its high cycle life makes its energy cost a fraction of the Yeti's across the unit's life. The Yeti 500X wins one axis, raw capacity, and it matters in one place: a full overnight CPAP charge the C300 can't quite finish. If that single big overnight run is your hard requirement, buy the Yeti. Otherwise the C300 is the clear, cheaper pick.
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.
$329.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
or check the Yeti 500X price$499.95 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated August 30, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, CPAP, 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, SOLIX C300 rates 4.2/5 (52nd percentile of 22 Personal-class units), and Yeti 500X rates 3.5/5 (14th 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.
One of them you can check from bed
The C300 reports its battery level and pushes low-battery alerts to your phone. The Yeti 500X makes you walk over and read the panel on the box. Trivial at noon. Less trivial at 6am, when you want to know whether it carried your gear through the night without getting up to find out.
Surge Power: Inverter Quality Indicator
The Yeti 500X has a 4× surge-to-continuous ratio vs the SOLIX C300's 2×, and the higher absolute ceiling with it — 1,200W against 600W. At 4× it clears the 2× rule of thumb for absorbing motor startups — fridges, AC compressors and power tools briefly draw 2-3× their rated wattage. What decides whether a given motor starts is the ceiling, not the ratio: the SOLIX C300 still surges to 600W, so check the startup draw of the heaviest thing you plan to run against that figure rather than assuming it trips.
The C300 can bridge a blackout. The Yeti can't.
Only the C300 lists a UPS mode: sit it between the wall and a router, modem, or desktop and it hands them to battery in no worse than 10ms when the grid drops, quick enough on paper that they ride through without rebooting. The Yeti 500X lists nothing here, so whatever's plugged into it blinks off with the power. One honest limit on the C300's trick, though: it bridges the flicker, not the night. At 245Wh usable it'll hold a router up for a good while, but it is not a CPAP's overnight backup.
Warranty: 5 Years vs 2
The SOLIX C300 is covered for 5 years against the Yeti 500X's 2 years. An underrated factor if you're keeping this unit for years.
Battery Lifespan in Real Years
The SOLIX C300 is rated for 3,000 cycles vs 500. In real life: at daily use, that's 8.2 vs 1.4 years. At weekend use (twice a week), it's 29 vs 5 years. One caution reading years across different sizes: a cycle is 288Wh on the SOLIX C300 and 497Wh on the Yeti 500X, so count lifetime energy — roughly 864 kWh against 249 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
One number on the table, and it's a floor
The C300 publishes a 25dB noise figure; the Yeti 500X publishes none. That is not proof the Yeti is louder. It means there's no number to hold it to. And take the 25dB for what it is: a manufacturer best-case floor for quiet mode, not what you'll hear while it fast-charges. If this is going in a bedroom or next to a CPAP, it's the only published figure you have. Weigh it as a spec, not a measurement, and find a hands-on report of the Yeti before you bet a light sleeper's night on it.
Full record above — the Test Desk pick is the SOLIX C300.
Check SOLIX C300 price →or check the Yeti 500X 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 C300 wins on both sticker price and long-term value. At $0.38/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $1.63 less — check the SOLIX C300 price →
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 support. Historically known for incredible no-hassle replacements, but recent reports describe AI-driven support agents giving generic responses and complex return logistics for heavy units (hazmat shipping). The Anker brand reputation is still strong, but SOLIX-specific support quality is trending down.
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 from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Strong $/Wh value in the mid-size and larger units — the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Anker carries real parent-brand trust and a deep SOLIX lineup, but SOLIX-specific support has been trending down from its old no-hassle-replacement reputation, with reports of AI-driven agents and return friction on heavy units. On a 9-pound station under a 5-year warranty, that friction bites less than it would on a flagship.
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
US-based company (Salt Lake City, owned by NRG Energy). Historically considered premium support, but 2025-2026 reports describe long wait times, unresponsive email communication, and tickets going unaddressed for weeks. The "premium support justifies premium pricing" argument is weakening.
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
Goal Zero is the heritage name here, US-based with a genuine ecosystem of coolers, solar panels, and vehicle kits. The catch in 2025 and 2026 is service: long support waits, unresponsive email, and recently shuttered community forums have dulled the premium-support case that used to justify the premium price.
Analyst note
Both brands' support has slipped from its former standard, so neither badge is quite the safety net it once was. Buy on the hardware in front of you and the warranty behind it. On that count the C300's 5 years outrun the Yeti's 2.
Growth path
SOLIX C300
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 500X
FIXED CAPACITYFixed at 497Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 120W of solar. Limited to a single portable panel.
Limited ports. You'll likely need a power strip or splitter.
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 500X 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 C300
Field data on the C300 is still thin, it's a new unit, and what exists is review coverage rather than long-term owner reports. Reviewers call it impressively light and compact for 288WhA2 and single out its UPS switchover, rated at no worse than 10ms, as genuinely unusual at this size and priceA3; the dual 140W USB-C is a recurring highlightA1A2. One buying note from our own research: some listings show a C300 DC without an AC inverter and a C300X, but this comparison is the standard C300 with AC outputA0.
“288Wh capacity with 300W output (600W with SurgePad) and dual 140W USB-C ports for fast device charging.”
Sources
ankersolix.com · trustedreviews.com · im.com.au · solarwaypoint.com · backuppowerhub.com · powerstationlab.com
Goal Zero Yeti 500X
The Yeti 500X has the longer owner track record of the two. Owners report it reliably keeping a stack of small gear going, two laptops, a Switch, an iPad, and several phones, without complaintB3, and reviewers praise its build quality and how compact it is for its capacityB2. The recurring caveat is chemistry and age: it's a 500-cycle Li-NMC pack, and a newer LFP Yeti 500 has since replaced it with a much higher cycle ratingB1B4.
“Weighs 12.9 lbs and is one of the most compact 505Wh power stations, with praised portability and build quality.”
Sources
nomadwatts.com · bestbuy.com · yuenx.com · survival-kompass.de · 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
- Compact, light design; dual 140W USB-C fast charging; and a standout 10ms UPS rare at this size are the highlights. [SOLIX C300 · 3 entries]
- Compact, well-built, and reliable for small devices, but held back by 500-cycle NMC chemistry vs newer LFP. [Yeti 500X · 3 entries]
- A1
“288Wh capacity with 300W output (600W with SurgePad) and dual 140W USB-C ports for fast device charging.”
ankersolix.com / trustedreviews.com — SOLIX C300 review · 2026 · [positive]
- A2
“Anker claims the C300 is 30% smaller than competing power stations; reviewers call it impressively light and compact for the capacity, aimed at keeping phones and gadgets charged on hikes and camping trips.”
im.com.au / solarwaypoint.com — SOLIX C300 review · 2026 · [positive]
- A3
“Its 10ms UPS switchover is legitimately unique in this size and price class.”
backuppowerhub.com / powerstationlab.com — SOLIX C300 review · 2026 · [positive]
- B1
“A 505Wh Li-ion NMC battery rated for 500 charge cycles to 80% capacity, with a 300W continuous inverter (350W surge, 2,000W peak).”
nomadwatts.com / bestbuy.com — Yeti 500X review · 2026 · [negative]
- B2
“Weighs 12.9 lbs and is one of the most compact 505Wh power stations, with praised portability and build quality.”
yuenx.com / survival-kompass.de — Yeti 500X review · 2026 · [positive]
- B3
“Owners report reliably charging multiple devices — two laptops, a Nintendo Switch, an iPad, and multiple phones — without problems.”
bestbuy.com owner reviews — Yeti 500X · 2026 · [positive]
- B4
“An older NMC design; a newer LFP Yeti 500 has since replaced it with a far higher cycle rating.”
portablepowernerd.com — Yeti 500X/500 review · 2026 · [mixed]
Research compiled August 30, 2026.
Who Should Buy Which
Buy the SOLIX C300 if you…
- →The long-haul owner who'll charge phones, tablets, and a laptop off it for years and wants the lowest cost per kilowatt-hour over that life. This is the unit still going when the Yeti is on its replacement.
- →The day-tripper and car-camper who packs light: 9.1 lbs and dual 140W USB-C, small enough to live in the bag it travels in.
- →Anyone who wants basic backup for a router, modem, or desktop. The UPS mode hands over in no worse than 10ms when the grid blinks, which the Yeti can't do at all.
Buy the Yeti 500X if you…
- →The person whose one non-negotiable is finishing a single big overnight charge, a CPAP with the humidifier on at about 320Wh, on battery alone. The Yeti's 497Wh clears that night; the C300 doesn't, quite.
- →Someone already in the Goal Zero orbit, its coolers, solar panels, and vehicle kits, who wants the larger single-charge capacity and will pay for it, and who won't be cycling it down every night for years.
If neither fits
Anyone who needs to run a real load for real time: a full-size fridge, power tools, a space heater, or a whole workday near 900Wh. Both units stop at 300W of continuous output, and a 400W blender at a tailgate is already past what either will start, so capacity never even gets a vote. That job wants a larger station with a stronger inverter, not a choice between these two.
The Bottom Line
The C300 is the cheaper box and the one that outlives it. Rated to cycle several times as many times as the Yeti, it delivers the same watt-hours for a fraction of the lifetime cost, and it does that while weighing less and charging your laptop faster. When the less expensive unit is also the longer-lasting one, the decision mostly makes itself.
The Yeti 500X keeps one honest win: a bigger battery that finishes a CPAP night the C300 can't quite close. If that overnight run is the whole reason you're shopping, buy it. For the daily charger, the weekend camper, and the person who just wants a router to ride through a blackout, the C300 takes it on price, weight, warranty, and the energy math. Get the Anker.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker SOLIX C300 or the Goal Zero Yeti 500X cheaper to own over time?
The C300, and it isn't close. It's $170 cheaper up front ($330 against $500), and because it's rated for 3,000 charge cycles to the Yeti's 500, its energy works out to about $0.35 per lifetime kilowatt-hour versus $2.01. You pay less at the register and far less per unit of energy over the years you own it.
The Yeti 500X has a bigger battery, so why does it lose?
Its 497Wh against the C300's 288 is a genuine advantage, and it wins one of our seven scenarios outright, a full CPAP night. But it costs more, weighs nearly four pounds more (12.9 against 9.1 lbs), and its 500-cycle pack lasts about 1.4 years of daily use to the C300's 8.2. It gives you more capacity in a single charge and far less energy across its life.
Can either the C300 or the Yeti 500X run a CPAP all night?
The Yeti 500X can: about 422Wh usable covers a humidifier-heavy 320Wh night with room to spare. The C300 comes up roughly 75Wh short on that same night, though it publishes a 25dB noise floor and lists a UPS mode, rated no worse than 10ms, that the Yeti doesn't. For CPAP use every night over years, step up to a larger long-life unit rather than cycling either of these nightly.
Which is better for camping and travel?
The C300. It's 9.1 lbs to the Yeti's 12.9, and its dual 140W USB-C charges a laptop more than twice as fast as the Yeti's 60W. Both cap at 300W of continuous output, so neither runs anything with a motor or a heating element, but for keeping phones, tablets, and laptops topped up on the move, the lighter Anker is the easier haul.
Is the Goal Zero Yeti 500X outdated?
It's an older Li-NMC design, and Goal Zero has since released an LFP Yeti 500 with a much higher cycle rating. That doesn't make the 500X bad; owners still report solid, reliable performance. But its 500-cycle life is its main limitation next to a modern LFP unit like the C300, and if long-term cost-per-use matters to you, that gap is the whole story.
Where to buy
Anker SOLIX C300Pick
$329.99
$329.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Goal Zero Yeti 500X
$499.95
$499.95 · 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.