Head-to-head test
Anker SOLIX C300 DC vs Goal Zero Yeti PRO 4000
The C300 DC has no AC outlets and the Yeti PRO 4000 weighs 115.7 lbs, so this was never a which-is-better question. It's whether the thing you need to power has a wall plug or fits in a backpack.
Full profiles: Anker SOLIX C300 DC → · Goal Zero Yeti PRO 4000 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$199.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
$3,999.95 · direct from Goal Zero
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
One of these is a 6.2-pound box that charges phones and cameras. The other is a 115.7-pound, $4,000 battery that can back up a house through a multi-day outage. They landed on the same comparison page and share almost nothing else: not price, not weight, not even whether they have a single AC outlet between them. So this isn't a contest with a winner. It's a fork.
Start with the one spec that ends most of the argument. The C300 DC has no AC outlets at all. Its 300W rating is a DC total across USB and a 12V socket, not an inverter, so anything with a two-prong wall plug (a fridge, a coffee maker, a box fan) never runs on it at any wattage. That's why in five of the six household scenarios we model, the little Anker is out before capacity is even counted. In the sixth, a CPAP night, it's the energy that runs out. The Yeti PRO 4000 carries a real 3,600W inverter behind its outlets and plays in both worlds.
The strange part is that neither is a rip-off for what it is. Over their rated lives they cost within two cents of each other per kilowatt-hour, $0.23 for the C300 DC against $0.25 for the Yeti. The gap between their price tags doesn't buy pricier energy. It buys about fourteen times the capacity (3,994Wh against 288Wh), an inverter, a UPS, and a path to partial-home backup. If you'll use those, the Yeti is fairly priced. If you won't, you're buying a capability you'll never plug into.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
Anything you'd plug into a wall, a fridge, a router's AC adapter, a coffee maker, never runs on the C300 DC at any wattage, which is why it's disqualified from most of these scenarios before capacity is even discussed. The Yeti isn't beating it on those jobs. The C300 DC isn't entered.
C300 DC has no AC outlets; its 300W is a DC total across USB and a 12V socketYeti PRO 4000 has a 3,600W inverter behind 4 AC outletsC300 DC fails five of six household scenarios because the loads are wall-plug appliances
Why it mattersIf a single device you want to power ends in a two-prong plug, the C300 DC is out, and you're shopping the Yeti alone.
cost / lifetime kWh
So the 20x price gap ($4,000 against $200) isn't the Yeti selling dear energy. It's selling fourteen times the capacity, an inverter, and UPS backup in one heavy package, a bargain if you'll cycle multiple kilowatt-hours a week and a waste if you'll top up a phone.
C300 DC costs $0.23 per lifetime kWh; Yeti PRO 4000 costs $0.25Sticker price is $200 versus $4,000Yeti holds about fourteen times the capacity (3,994Wh against 288Wh)
Why it mattersDon't let '$0.25 a kilowatt-hour, great value' talk you into four grand of capacity you'll never come close to draining.
245Wh of usable energy covers about three-quarters of a 320Wh night and then stops, so a machine you're relying on to breathe quits before your alarm. This is the closest the C300 DC comes to an appliance job, and it still can't finish it. The Yeti covers the same night with 3,075Wh still in the tank.
CPAP Overnight needs 320Wh in our modelC300 DC has 245Wh usable (288Wh times 0.85)Yeti finishes the same night with 3,075Wh to spare and lists a UPS mode
Why it mattersAnyone shopping either box to run a CPAP overnight should read the C300 DC's low price as a hard no, not a thrifty maybe.
weight
That weight is why the Yeti forfeits the camping and tailgate scenarios it has the capacity to win. A 3,994Wh battery you can't get to the site is 0Wh once you're there. The C300 DC's whole argument is that it actually comes with you.
C300 DC weighs 6.2 lbsYeti PRO 4000 weighs 115.7 lbs, a two-person liftYeti loses Weekend Camping and Tailgate to 'neither' despite having the energy
Why it mattersIf the power has to travel, buy for where you'll use it, not for the bigger number: the Yeti's capacity is theoretical at a campsite and the C300 DC's portability is the only spec that pays out.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Five of the six household scenarios rule the C300 DC out. Its lack of AC outlets, not its 288Wh, is what settles most of this matchup.
Run the six household scenarios and the C300 DC completes none of them, but read why before you write it off. Five times it's the missing AC inverter: the blackout fridge, the workday monitor, the tailgate blender all end in a wall plug the Anker doesn't have. The sixth, a CPAP night, is the only one it's physically entered in, and there it runs 75Wh short of the 320Wh the night needs. None of that is a knock on the C300 DC. It's a box for phones, cameras, and 12V gear, and those loads simply aren't what these scenarios test.
The Yeti clears every household scenario it can reach, usually by a wide margin: 1,750Wh to spare in the blackout, 2,485Wh left after a workday. The exceptions are telling. It forfeits weekend camping and the tailgate to 'neither' not for lack of power but because 115.7 lbs doesn't go to a campsite. Capacity it has in surplus. Portability is the one scenario axis it loses.
Portability & Form Factor
Selected because: 6.2 lbs against 115.7 lbs is the axis that decides where each unit can actually be used: luggage on one side, a set-once appliance on the other.
weight
6.2 pounds is the number that defines the C300 DC. You grab it off a shelf with two fingers, drop it in a daypack, and forget it's there until a phone needs topping up. It's closer to a heavy power bank than to a power station, and that's the point of the thing.
115.7 pounds is a different relationship. That's a two-person lift, a spot you choose once and commit to, an appliance that happens to run on a battery rather than a thing you carry. For a cabin, an RV bay, or a corner of the garage wired for outages, that's fine; you're not moving it anyway. For anything that has to ride in a car and come out powered at the other end, 115.7 pounds is a dealbreaker no capacity number can buy back.
Lifetime Value
Selected because: Over their rated lives the two cost within two cents per kWh ($0.23 vs $0.25), so the 20x price gap is about capability, not value.
cost / lifetime kWh
Here's the surprise in the money: measured over their rated lives, these two cost almost the same per kilowatt-hour. $0.23 for the C300 DC, $0.25 for the Yeti, a two-cent spread on a page where everything else is a chasm. The C300 DC is even cheaper per nameplate watt-hour ($0.69 against $1.00); the Yeti closes the lifetime gap only because it's rated for 4,000 cycles to the Anker's 3,000.
So the $4,000 sticker isn't a premium on the energy. It's the price of an inverter, 3,994Wh of capacity, and a UPS the C300 DC doesn't carry, bought in one lump. Whether that's a good deal turns entirely on use. Cycle a few kilowatt-hours a week through it and $0.25 is honest; buy it to keep phones alive on weekends and you've spent $4,000 to use a sliver of it. The C300 DC's $200 asks for no such commitment.
What the Specs Don't Tell You
Selected because: The deciding catches cluster here: the C300 DC's missing inverter, the Yeti's 115.7-lb weight and UPS mode, and how little of $4,000 you'd use on small loads.
rated cycles
Four catches actually move this decision, and they don't point the same way. The C300 DC's is structural: no AC inverter, so the 300W can't run a single wall-plug appliance. Decide which side of that line your gear lives on before anything else. The Yeti's headline catch is the flip side of its capability: 115.7 pounds you place once, and a $4,000 outlay you'll barely dent on small loads.
Two smaller notes tilt the other way, toward the Yeti. It lists a UPS mode that cuts to battery in no worse than 15ms, real value for a router, a desktop, or a CPAP you can't have blink, and it's covered for 5 years to the C300 DC's 3. Neither changes the core fork. But if your reason for buying is unattended backup, the UPS line is the Yeti's alone.
Strengths & trade-offs
Anker SOLIX C300 DC
Strengths
- +Costs $3,800 less
- +Lighter by 109.5 lb
Trade-offs
- –Weaker inverter (-3,300W) limits appliance compatibility.
- –Sealed capacity — the Yeti PRO 4000 can add batteries to grow past 288Wh; this one can't.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Yeti PRO 4000's 4,000, so it wears out sooner.
Goal Zero Yeti PRO 4000
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$3,800) than the SOLIX C300 DC.
- –Significantly heavier (+109.5 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
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 gives you a powered weekend: the Yeti PRO 4000 has the energy but doesn't travel, and the SOLIX C300 DC has no AC outlets, so the led lights and box fan in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that. One can't go; the other can't finish.
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
Yeti PRO 4000
The SOLIX C300 DC has no AC outlets, so the fridge, router + modem and the rest in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that. The Yeti PRO 4000 handles this scenario with 1,750Wh to spare.
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 PRO 4000
The one night these two are judged on the same axis, and the small one still can't make it to morning. A 12V CPAP is within the C300 DC's ports, so this isn't the AC-outlet problem, it's energy. 245Wh usable runs out about 75Wh short of the 320Wh the night asks for, roughly three-quarters of the way there. The Yeti finishes with 3,075Wh untouched and adds a UPS the C300 DC doesn't have. If a CPAP is the reason you're shopping, capacity decides this, and only one of them has 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
Yeti PRO 4000
The SOLIX C300 DC has no AC outlets, so the external monitor and router + modem in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that. The Yeti PRO 4000 handles this scenario with 2,485Wh to spare.
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 gives you a powered game day: the Yeti PRO 4000 has the energy but doesn't travel, and the SOLIX C300 DC has no AC outlets, so the blender and led tv in this scenario never plug in — it's a DC station for USB and 12V gear, and no wattage figure changes that. One can't go; the other can't finish.
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
This scenario beats both boxes, which is worth knowing before you count on either. A full van day here draws 4,685Wh. The C300 DC has no AC outlets and 245Wh of usable energy, so it's out twice over. But even the Yeti, with 3,395Wh usable, comes up 1,290Wh short before the day ends. One's the wrong tool and the other's the right tool a size too small; full-time van power wants an expanded system or a house bank, not either unit as it ships.
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 row is here for the SOLIX C300 DC's class of job: phones and a speaker, 100Wh across an afternoon. Both cover it — the SOLIX C300 DC finishes at 41% used, and the Yeti PRO 4000 barely notices it. For this job the Yeti PRO 4000's extra capacity is dead weight, not headroom; take the SOLIX C300 DC at 6.2 lbs and leave the rest at home.
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
Only the Yeti PRO 4000 can run this load — the SOLIX C300 DC has no AC outlets for the wall-plug gear in it.
$3,999.95 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 0–226.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–45.3hHigh-Draw Appliances
These reveal the real limitsscale 0–3.4h¹ 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 Yeti PRO 4000, on Power Score margin
There's no head-to-head winner here because these aren't substitutes. Ask one question: does anything you want to power have a wall plug, or need more than the 245Wh of usable energy the little Anker carries? If yes, only the Yeti PRO 4000 qualifies. It has a 3,600W inverter and 3,994Wh, at $4,000 and 115.7 lbs. If no, and your loads are phones, a laptop, a camera, and 12V gear, the C300 DC does the job for $200 at 6.2 lbs, and the Yeti is dead weight two people would have to lift. Figure out which side of that line you're on and the page has already answered itself.
Editor-assigned confidence, based on cited owner research and spec analysis.
Written by Gunner Gustafson, Whole-Home Backup 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): RV Living, Home Backup, Solar Generator, Food Truck, Apartment Balcony, Camping.
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 DC rates 4.4/5 (62nd percentile of 22 Personal-class units), and Yeti PRO 4000 rates 3.6/5 (20th percentile of 16 Home Backup-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.
Yeti PRO 4000: 115.7 lbs Is a Commitment
At 115.7 lbs, this is a two-person lift. Plan your placement carefully. Once it's set up, you won't want to move it. It's a semi-permanent appliance. Pick your spot.
SOLIX C300 DC: No AC Outlets At All
The SOLIX C300 DC's 300W is a DC port total — USB and 12V — not an inverter rating. Anything with a wall plug (a fridge, a TV, a coffee maker, most fans and lamps) never plugs in, at any wattage. That's the design, not a defect: it buys weight, silence, and efficiency for phone, laptop, camera, and 12V-CPAP loads. The Yeti PRO 4000 carries a real inverter behind 4 AC outlets, so it plays in both worlds. Decide which side of that line your gear lives on before weighing anything else on this page.
Sealed at 288Wh vs. Expandable, but Not Against Each Other
The C300 DC is sealed at 288Wh: what you buy is the ceiling. The Yeti PRO 4000 takes expansion batteries and can climb toward partial-home backup. That looks like a clean Yeti win, and within its own class it is. But if you outgrow 288Wh of device charging, the answer isn't a $4,000, 115.7-lb tower, it's a mid-size portable. Expandability only counts when you'd actually use the room it opens up, and these two buyers rarely want the same room.
Only the Yeti PRO 4000 Lists a UPS Mode
The Yeti PRO 4000 can sit between the wall and your gear and hand it to battery when the grid drops — rated ≤15ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. Worth it for a router, a desktop PC, or a CPAP. The SOLIX C300 DC's spec sheet lists no UPS mode, so anything plugged into it rides an outage only as far as your reaction time.
Warranty: 5 Years vs 3
The Yeti PRO 4000 is covered for 5 years against the SOLIX C300 DC's 3 years. The cheaper SOLIX C300 DC does buy more warranty per dollar (15 years per $1,000 against 1.3), but that is a statement about price, not about coverage — if a fault appears in year 4, only one of these is still covered. An underrated factor if you're keeping this unit for years.
Battery Lifespan in Real Years
The Yeti PRO 4000 is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. One caution reading years across different sizes: a cycle is 3,994Wh on the Yeti PRO 4000 and 288Wh on the SOLIX C300 DC, so count lifetime energy — roughly 15,976 kWh against 864 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.
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 ($0.23/kWh vs $0.25/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
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
SOLIX support has drifted toward AI-driven responses, and heavy units can mean hazmat return logistics, barely a concern on something as light as the 6.2-lb C300 DC.
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
Support has slipped from its old premium standard, and the community forums longtime owners relied on were recently shut down.
Analyst note
Both brands' support stories are sliding, and that matters more the more you spend. Anker plays the value-to-mid game with a well-rated app; Goal Zero is the premium heritage name, US-based and ruggedized, but 2025-2026 reports describe long waits and unanswered tickets. On a $200 C300 DC a support miss is an annoyance. On a $4,000 Yeti it's most of the bet, so weigh Goal Zero's recent service record before you commit to the big box.
Growth path
SOLIX C300 DC
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 PRO 4000
EXPANDABLESupports Goal Zero expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,994Wh.
Accepts up to 3,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are Goal Zero-specific. You're investing in the Goal Zero ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The SOLIX C300 DC is sealed at 288Wh, which is fine if that covers you. The Yeti PRO 4000 starts at 3,994Wh and can grow beyond it with Goal Zero expansion batteries — real headroom the SOLIX C300 DC doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
Anker SOLIX C300 DC
Field history on the C300 DC is still thin and skews toward reviewers more than long-term owners, but the reads are consistent. Reviewers describe a 288Wh unit that deliberately drops the heavy AC inverter to stay light at about 6.2 lbsA1, with a generous port set (two USB-A, four USB-C, a 12V socket) and two-way USB-C that refills it to 80% in roughly an hourA2. Owners who've bought it praise exactly what it's for: charging a phone and a laptop several times over, running a fan for hours, or powering a small light setupA3. The recurring framing is that it's a device charger for travelers, not an appliance boxA4, which is the same line the scenarios draw, from the other direction.
“A 288Wh unit that ditches the heavy AC inverter to focus on DC power, keeping it very light at about 6.2 lbs.”
Sources
the-gadgeteer.com · forbes.com · androidpolice.com · batteryessence.com · bestbuy.com · campingsolar.us
Goal Zero Yeti PRO 4000
The Yeti PRO 4000 earns real praise and one real worry. Reviewers call out a 3,000W solar input that refills it from empty in under two hours off-grid, plus genuine expandabilityB2, and rate the build among the most durable they've handled, backed by US-based support and a well-liked appB1; it's a repeated pick for RV and camping backupB4. The worry is reliability: owners report 12V errors, including one unit returned or replaced and a second that threw a 12V fault and wouldn't charge from solarB3. On a $4,000 purchase that's the report to weigh most. Not universal, but not the kind of failure you want on a unit this heavy to ship back.
“Weighs about 115.7 lbs — a two-person unit to move — with one of the most durable builds reviewers have seen, backed by American-based support and a great app.”
Sources
bestgeneratorsolar.com · thesolarlab.com · goalzero.com · business.walmart.co · techradar.com · cleantechnica.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
- Light DC-only design (no AC inverter), fast USB-C charging, and good port selection for device charging are the highlights. [SOLIX C300 DC · 3 entries]
- Strong solar input, a great app, American-based support, and a durable build are the praise; heavy weight and some owner reliability reports (12V errors) are the caveats. [Yeti PRO 4000 · 3 entries]
- A1
“A 288Wh unit that ditches the heavy AC inverter to focus on DC power, keeping it very light at about 6.2 lbs.”
the-gadgeteer.com / forbes.com — SOLIX C300 DC review · 2026 · [positive]
- A2
“Offers 2 USB-A and 4 USB-C ports plus a 12V car socket; two-way USB-C with PD 3.1 recharges the unit to 80% in about 1 hour.”
androidpolice.com / batteryessence.com — SOLIX C300 DC review · 2026 · [positive]
- A3
“Owners praise its portability and capacity — enough to charge a phone and laptop several times, run a fan for hours, or power a small light setup.”
bestbuy.com owner reviews — SOLIX C300 DC / C300X · 2026 · [positive]
- A4
“A DC-focused design with app integration and solar support — best for modern travelers charging devices, not running AC appliances.”
androidpolice.com / campingsolar.us — SOLIX C300 DC review · 2026 · [mixed]
- B1
“Weighs about 115.7 lbs — a two-person unit to move — with one of the most durable builds reviewers have seen, backed by American-based support and a great app.”
bestgeneratorsolar.com / thesolarlab.com — Yeti PRO 4000 review · 2026 · [mixed]
- B2
“3,000W solar input recharges 0-100% in under 2 hours off-grid, with impressive surge and idle efficiency; fully expandable.”
goalzero.com / thesolarlab.com — Yeti PRO 4000 review · 2026 · [positive]
- B3
“Owner reliability is mixed — some report 12V errors, including a first unit returned or replaced and a second that had a 12V error and would not charge from solar.”
business.walmart.com reviews / oliver owner forums — Yeti PRO 4000 · 2026 · [negative]
- B4
“Roughly 3,994Wh capacity; praised for RV and camping backup.”
techradar.com / cleantechnica.com — Yeti PRO 4000 review · 2026 · [positive]
Research compiled August 30, 2026.
What Owners Actually Report
Drawn from 14 comments on independent review channels — not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
Anker SOLIX C300 DC
12 claims from 8 comments · 10 from owners · 5 with figures
- Solar input
- 4 · 100% negative
- Runtime
- 2 · 0% negative
- Charging
- 2 · 39% negative
- Other
- 1 · 0% negative
- Size & weight
- 1 · 0% negative
What owners complain about
28V input ceiling blocks a 25.6V LiFePO4 bank, which can reach 29.2V fully charged.
Solar inputmeasuredowner4 agreedsource →
Says the C300 DC has no pass-through charging and just cycles between 98% and 100%.
Charging7 agreedsource →
DC5521 plugs with poor tolerances have heated up at 5A; wishes it used XT60 throughout.
Build qualityownersource →
What owners praise
BiPAP with heated hose and humidifier at 80% used 47% of the 288Wh pack over 5 hours of sleep.
Runtimemeasuredowner5 agreedsource →
Can be charged over USB-C at up to 140W, which he thinks is fantastic.
Chargingmeasuredownersource →
His favorite unit: small, transportable, very efficient on 12V and charges well off solar.
Otherownersource →
Goal Zero Yeti PRO 4000
15 claims from 6 comments · 14 from owners · 3 with figures
- Runtime
- 2 · 54% negative
- App & firmware
- 2 · 50% negative
- Warranty & support
- 2 · 0% negative
- Durability
- 1 · 100% negative
- Build quality
- 2 · 0% negative
What owners complain about
Lasted only 11 months and had to be replaced twice before he returned it.
Durabilitymeasuredownerafter 11 monthssource →
Charges to 100% then falls to 88% within 1-2 hours and sits there until recharged.
Idle drainmeasuredownersource →
Runs a 500W oxygen concentrator about 3 hours against the 7 hours he was promised.
Runtimemeasuredownersource →
What owners praise
With a Tank Pro expansion it has powered his whole camper van build for a year.
Runtimeownerafter 12 months1 agreedsource →
30A DC and 30A AC outputs plus the angled display are especially useful in a van build.
Build qualityowner1 agreedsource →
Sent it back completely and got all of his money back.
Warranty & supportownersource →
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results — for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the SOLIX C300 DC if you…
- →The traveler whose whole kit charges over USB or 12V (phone, laptop, camera, headphones, a drone battery) and who notices every pound in the bag. At 6.2 lbs the C300 DC is the one you actually bring.
- →The car camper or overlander who wants to keep devices and 12V gear alive for a weekend without hauling an appliance, and who has no wall-plug loads to run.
- →Anyone who'd otherwise buy a big USB power bank and wants more headroom, 288Wh and 140W USB-C charging, in the same grab-and-go form.
Buy the Yeti PRO 4000 if you…
- →The homeowner wiring a corner of the house for outages who needs a fridge, a router, and a CPAP to ride through a multi-day blackout, and who wants a UPS that cuts over in no worse than 15ms.
- →The RV or cabin owner who'll set a 115.7-lb unit down once, cycle real kilowatt-hours through it weekly, and eventually bolt on expansion batteries toward partial-home backup.
- →The buyer running actual AC appliances off-grid (power tools, a full-size fridge, kitchen gear) who needs the 3,600W inverter and 3,994Wh the C300 DC can't approach.
If neither fits
If you want to run AC appliances and carry the unit to where you'll use them, neither of these fits: the C300 DC has no outlets to run them and the Yeti is too heavy to bring. That buyer wants a mid-size portable with a real inverter, something that sits between these two, with AC outlets but without needing two people to lift it. And the full-time van-lifer whose daily draw runs near 4,685Wh should note that even the Yeti falls 1,290Wh short of that day; that job wants an expanded system or a dedicated house bank, not either box as it ships.
The Bottom Line
Stop comparing these on capacity or price and ask the only question that resolves them: does the thing you need to power have a wall plug? If it does, the C300 DC can't run it, and you're buying the Yeti PRO 4000, a 3,600W inverter and 3,994Wh at $4,000, heavy enough to need two people and a permanent home. If it doesn't, if your world is USB and 12V, the C300 DC does the job at $200 and 6.2 lbs, and the Yeti is four thousand dollars aimed at a problem you don't have.
That's why there's no winner to crown here. They're not two answers to one question; they're the right answers to two different ones. Match the box to your loads and your back, and whichever you pick, you'll have chosen right. Guess based on the bigger number and you'll own the wrong one.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the Anker SOLIX C300 DC run AC appliances like a fridge or a coffee maker?
No. The C300 DC has no AC outlets at all. Its 300W rating is a DC total across USB ports and a 12V socket, not an inverter, so anything with a two-prong wall plug won't run on it at any wattage. It's built for phones, laptops, cameras, and 12V gear. For wall-plug appliances you need a unit with an inverter, like the Yeti PRO 4000.
Why does the Goal Zero Yeti PRO 4000 cost 20 times as much as the C300 DC?
You're paying for capability, not pricier energy. Over their rated lives the two cost almost the same per kilowatt-hour ($0.25 versus $0.23), but the Yeti packs about fourteen times the capacity (3,994Wh against 288Wh), a 3,600W inverter, UPS backup, and expandability. That's worth $4,000 if you'll actually use a partial-home backup system, and a lot of money if you only need to charge devices.
How heavy is the Yeti PRO 4000, and can one person move it?
It's 115.7 lbs, a two-person lift, and one of the more solidly built units reviewers have handled. Practically, it's a set-it-once appliance: you choose a spot and leave it. That weight is why it loses portable scenarios like weekend camping despite having far more capacity than it needs for them.
Which one should I get for van life?
Possibly neither, on its own. A full-time van day can draw around 4,685Wh in our model, and even the Yeti's 3,994Wh falls about 1,290Wh short of that before morning; the C300 DC has no AC outlets and only 245Wh usable. Serious van power usually means an expanded system or a dedicated house battery bank. The C300 DC can still ride along as a light device charger.
What can the C300 DC actually power, and how fast does it recharge?
Think devices, not appliances: it'll top up a phone and a laptop several times over, run a fan for hours, or power a small light setup. It charges over USB-C at up to 140W and refills to 80% in about an hour via two-way USB-C. What it won't do is run anything that plugs into a wall.
Where to buy
Anker SOLIX C300 DC
$199.99
$199.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Goal Zero Yeti PRO 4000
$3,999.95
$3,999.95 · 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.