Head-to-head test
Anker SOLIX C300 DC vs BLUETTI Apex 300 + B500K
This isn't a comparison, it's a fork: a 6-pound DC charger for gadgets or a 183-pound home battery for your circuits, and your gear already knows which one it needs.
Full profiles: Anker SOLIX C300 DC → · BLUETTI Apex 300 + B500K →
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.
$3,299.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
One of these weighs 6 pounds and can't run a single wall outlet; the other weighs 183 and gets installed like an appliance. The Anker SOLIX C300 DC is a $200, 288Wh DC charger for phones, laptops, cameras, and 12V gear. The BLUETTI Apex 300 + B500K is a $3,299, 7,885Wh home battery with a 3,840W inverter, six AC outlets, and a path toward backing up your house. Putting them head to head is like cross-shopping a power bank and a standby generator.
So there's no better here, only which question you're asking. If your gear charges over USB or 12V and you want to sling it in a bag, the C300 is the whole answer at 6.2 lbs. If you need real outlets running a fridge and a router through a blackout, the C300 has literally no socket to plug them into, and the Apex is the only unit on this page that qualifies. The roughly 27-times capacity gap and the 16-times price gap aren't a contest; they're a signpost telling you which aisle you're standing in.
And a large group should buy neither: anyone whose load is both mobile and AC, a campsite coffee maker, a tailgate blender, a van microwave, because the C300 can't power it and the 183-lb Apex can't come along. That group wants a mid-size portable this page doesn't include. Everyone else, read on. The specs just confirm which of the two jobs is yours.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
That's why the scenario grid reads as a wall, not a gap. Across the blackout, the workday, the van, the tailgate, and the campsite, the C300 DC fails with energy to spare, because the fridge and router and monitor all end in three-prong plugs and it has no outlet to receive them. Its 288Wh never enters the argument; the plug shape settled it first.
SOLIX C300 DC: 0 AC outlets; its 300W is a DC port total (USB/12V), not an inverter ratingApex 300 + B500K: 3,840W inverter behind 6 AC outletsBlackout, Remote Workday, Van Life, Tailgate, and Weekend Camping all list wall-plug gear the C300 can't power
Why it mattersBefore you weigh a single watt-hour, check your gear: if anything on your list ends in a wall plug, the C300 is out, and if it's all USB and 12V, the Apex's inverter is 183 lbs of answer to a question you don't have.
Typical price
But that 12 cents only cashes out if you actually cycle house-sized loads. On a 100Wh afternoon, a real day for a C300 buyer, you'd be using 1% of the Apex to save eleven cents a kilowatt-hour, having spent $3,099 more at the register. The per-kWh math is true and irrelevant unless your daily draw is genuinely a home's.
C300 DC: $200 over 864 lifetime kWh = $0.23 per kWhApex 300 + B500K: $3,299 over 27,597 lifetime kWh = $0.12 per kWhAfternoon Off-Grid = 100Wh: 1% of the Apex, 41% of the C300
Why it mattersIf you push home-scale energy most days, the Apex's cheaper kilowatt-hour is real money; if you charge a laptop and a camera, the C300's lower entry price is the only figure you will ever feel.
That spread is why the two mobile scenarios come back neither: the Apex has the energy for a tailgate but can't get to the parking lot, and the C300 can get there but has no outlet for the blender. Weight and the missing inverter aren't two separate columns; together they say neither unit belongs at a mobile event with real appliances.
C300 DC: 6.17 lbsApex 300 + B500K: 183 lbs, stationary, two-person liftWeekend Camping and Tailgate Party both resolve to 'neither'
Why it mattersIf your power needs travel and include anything with a wall plug, skip both of these and shop a mid-size portable with a handle and a real inverter.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The scenario grid is where the no-AC-outlet reality and the two 'neither' rows do the deciding, not the raw watt-hours.
The grid looks lopsided, the Apex 300 + B500K clears 8-Hour Blackout, Remote Workday, CPAP Overnight, and Van Life Daily while the C300 DC clears none of them, but read why it loses, not just that it does. In the AC jobs it isn't running out of battery. The fridge, the router, the monitor, and the lights all end in wall plugs, and the C300 has no outlet to take them, so they never switch on. The one place capacity actually bites is CPAP Overnight: 245Wh usable against the 320Wh an overnight needs leaves it about three-quarters of the way to morning.
The two neither rows, Weekend Camping and Tailgate Party, are the honest center of this matchup. Both fail because the Apex can't travel to the site and the C300 can't power an AC appliance once you're there. The only row the C300 wins is a 100Wh afternoon of phones and a speaker, where it finishes at 41% used and the Apex's 7,885Wh is dead weight you hauled for nothing. That single overlap is the whole relationship between these two units: they meet on exactly one small job, and even there they want opposite things from you.
Portability & Form Factor
Selected because: 6.17 lbs against 183 is the split that sends these two to different jobs, and the reason both mobile scenarios come back 'neither.'
weight
Six pounds against 183 is the stat that tells you these were built for different rooms of your life. The C300 DC is a grab-it-off-the-shelf, one-hand carryA1; the Apex is a two-person lift you position once and treat as a fixture. Reviewers of the Apex-class hardware put it bluntly, one noted it's 'so heavy I can hardly carry it more than a few feet at a time'B11, though that account describes a sibling configuration rather than this exact pairing, so take it as character, not spec.
This is the other half of why the mobile scenarios collapse. A unit you can't lift onto a table isn't going to a campsite, and a 6-lb charger with no outlet isn't running a tailgate blender. If your use case has a wheel or a trailer under it, weight alone rules the Apex out; if it has a wall plug in it, the C300 was never in. Match the unit to whether the job holds still.
Lifetime Value
Selected because: The Apex is cheaper per lifetime kWh ($0.12 vs $0.23) but costs $660 a warranty year to the C300's $67, so which figure matters depends entirely on your load.
cost / lifetime kWh
On paper the pricey unit is the frugal one: 12 cents per lifetime kilowatt-hour for the Apex against 23 for the C300, because 7,885Wh cycled 3,500 times is an enormous amount of energy to spread $3,299 across. Run the same lens by the calendar, though, and it flips. The Apex costs about $660 per warranty year to the C300's $67, because the entry price is $3,299 against $200 and the coverage is only two years longer.
Which number matters is entirely about your load. The per-kWh figure is real savings for someone actually pushing home-scale energy through the thing every day. For someone charging a laptop and a camera, it's a rounding error they paid $3,099 of sticker to unlock. Cheaper-to-own and cheaper-to-buy point at different units here, and only one of them is measured in energy you'll actually use.
Growth Path
Selected because: Only the Apex expands past 7,885Wh; whether that's an advantage or beside the point depends on whether you're really shopping a home battery.
solar input
Only one of these can grow, and it barely matters. The Apex 300 + B500K takes BLUETTI expansion batteries, so its 7,885Wh is a floor you can build past toward partial-home backup; the C300 DC is sealed at 288Wh. On most pages that's a mark against the sealed unit. Here it isn't. You don't expand a 6-lb device charger into a house battery, and 288Wh is the finished form of that job, not a ceiling you'll resent.
So treat expandability as a question the Apex answers and the C300 never asked. If you can picture yourself adding capacity and driving toward whole-home coverage, you're already shopping in the Apex's category and the C300 was never a candidate. If you can't, the C300's fixed pack costs you nothing you'd have used. Expansion only counts when you're headed somewhere the small unit can't follow, and if you are, you knew it before you opened this page.
Strengths & trade-offs
Anker SOLIX C300 DC
Strengths
- +Costs $3,099 less
- +Lighter by 176.8 lb
Trade-offs
- –Weaker inverter (-3,540W) limits appliance compatibility.
- –Sealed capacity — the Apex 300 + B500K can add batteries to grow past 288Wh; this one can't.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Apex 300 + B500K's 6,000, so it wears out sooner.
BLUETTI Apex 300 + B500K
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$3,099) than the SOLIX C300 DC.
- –Significantly heavier (+176.8 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 Apex 300 + B500K 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
Apex 300 + B500K
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 Apex 300 + B500K handles this scenario with 5,057Wh 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
Apex 300 + B500K
Even a 12V CPAP that could draw straight from the C300 DC's DC ports runs dry around three-quarters of the way through, 245Wh usable against the 320Wh an overnight needs. A humidified machine that expects a wall outlet never starts, because there isn't one. Either path leads to the same place: the Apex 300 + B500K owns this night, covering it with thousands of watt-hours untouched and a hand-off rated no worse than 10ms if the grid blinks.
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
Apex 300 + B500K
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 Apex 300 + B500K handles this scenario with 5,792Wh 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 Apex 300 + B500K 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
Apex 300 + B500K
The SOLIX C300 DC has no AC outlets, so the mini-fridge, led lights 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 Apex 300 + B500K handles this scenario with 2,017Wh to spare.
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 Apex 300 + B500K barely notices it. For this job the Apex 300 + B500K'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 Apex 300 + B500K can run this load — the SOLIX C300 DC has no AC outlets for the wall-plug gear in it.
$3,299 list · direct from BLUETTI
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–446.8hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–89.4hHigh-Draw Appliances
These reveal the real limitsscale 0–6.7h¹ 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 Apex 300 + B500K, on Power Score margin
Don't read this as a scorecard; read it as a fork. The C300 DC and the Apex 300 + B500K don't do the same job. One is a 6.2-lb DC charger for USB and 12V gear with no AC outlets at all; the other is a 183-lb, 7,885Wh installed home battery with six AC outlets and a UPS rated no worse than 10ms. If your load list is phones, laptops, cameras, and a 12V fridge, buy the $200 C300 and skip the rest of this page. If it's household AC through a multi-day outage, only the $3,299 Apex qualifies. And if your job is mobile and needs AC at once, a tailgate, a campsite with real appliances, buy neither and shop a mid-size portable with a real inverter and a handle. The winner is whichever of those three sentences describes you.
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): Home Backup, 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 Apex 300 + B500K rates 3.5/5 (11th percentile of 29 Whole-Home / Off-Grid-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.
Apex 300 + B500K: 183 lbs Is a Commitment
At 183 lbs across its boxes, no one piece is the whole problem — but this is hardware you site, not hardware you carry. Once it's set up, you won't want to move it. It's a semi-permanent appliance. Pick your spot.
Apex 300 + B500K: 45dB Published
45dB is about as loud as a running refrigerator. It is BLUETTI's own rating rather than a reading on a shared bench — makers differ on whether they quote a best case or a figure under load, so treat it as a starting point rather than what you would hear at a bedside. For most people, fan noise around 45dB and up is where sleep starts to suffer.
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 Apex 300 + B500K carries a real inverter behind 6 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.
Fixed at 288Wh, and That's the Finished Form
The C300 DC is sealed at 288Wh with no way to add more, while the Apex 300 + B500K takes expansion batteries and climbs toward partial-home backup. On most matchups that's a knock on the sealed unit. Not this one. You don't grow a 6-pound device charger into a house battery; 288Wh is the complete version of the job it's built for. If you genuinely expect to need more, the honest move isn't a bigger C300, it's admitting you're shopping the Apex's category instead.
Only the Apex 300 + B500K Lists a UPS Mode
The Apex 300 + B500K can sit between the wall and your gear and hand it to battery when the grid drops — rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. 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 Apex 300 + B500K 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 1.5), but that is a statement about price, not about coverage — if a fault appears in year 4, only one of these is still covered. The Apex 300 + B500K's figure is a maximum rather than a guarantee — it depends on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term. An underrated factor if you're keeping this unit for years.
Battery Lifespan in Real Years
The Apex 300 + B500K is rated for 6,000 cycles vs 3,000. In real life: at daily use, that's 16.4 vs 8.2 years. At weekend use (twice a week), it's 58 vs 29 years. One caution reading years across different sizes: a cycle is 7,885Wh on the Apex 300 + B500K and 288Wh on the SOLIX C300 DC, so count lifetime energy — roughly 47,309 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.
SOLIX C300 DC: Noise Level Not Disclosed
The Apex 300 + B500K publishes its noise level (45dB); the SOLIX C300 DC doesn't publish one. That isn't evidence the SOLIX C300 DC is louder — it means there's no figure to hold it to, and no way to compare the two on this without hearing them. If you're buying for a bedroom, a CPAP, or an apartment, treat the Apex 300 + B500K's 45dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the SOLIX C300 DC before deciding.
Ownership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The SOLIX C300 DC is cheaper to buy, but the Apex 300 + B500K is cheaper to own. At $0.07/kWh over its lifetime vs $0.23/kWh, the Apex 300 + B500K'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 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
Support quality appears to be declining from its historically excellent level. Firmware updates have removed features without warning. Expansion ecosystem is smaller than EcoFlow's.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it — the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
Support is the brand factor that actually scales with the stakes here. If the $200 C300 DC fails, you're shipping a light box, and Anker's replacement process, even at its recently more bureaucratic level, is low-drama. If the $3,299 Apex needs warranty work, you're dealing with the category's most inconsistent, email-and-timezone support about a 183-lb appliance that moves as freight. That asymmetry is a real reason to buy the Apex direct from BLUETTI, where the coverage runs the full five years and support outcomes tend to be better.
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.
Apex 300 + B500K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 7,885Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI 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 Apex 300 + B500K starts at 7,885Wh and can grow beyond it with BLUETTI 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 reports on the C300 DC are early but they line up. Owners praise the portability and the device-charging headroom, enough to top a phone and a laptop several times over, run a fan for hours, or drive a small light setupA3. The port layout earns specific credit too: two USB-A, four USB-C, and a 12V socket, with two-way USB-C on PD 3.1 refilling the unit itself to about 80% in an hourA2. Reviewers frame it exactly as its design intends, a light DC rig for modern travelers charging gear rather than running AC appliancesA1A4.
“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
BLUETTI Apex 300 + B500K
Be honest about the evidence gap on the Apex side: the first-hand commentary that exists describes the bare Apex 300 or the +B300K combo, not this exact 7,885Wh Apex 300 + B500K pairing, and no long-term ownership reports surfaced at allB0. With that caveat, a few threads are worth knowing. Several reviewers call the fans unusually quiet and even for a unit this powerfulB1B2B13, though none is confirmed to be describing this configuration. More concretely, owners have hit firmware and app updates that locked the unit into a mode or threw inverter error codes, with fixes arriving in later updatesB7B8B9. And the bare unit draws handling complaints on two fronts: sheer weightB11 and a stripped port layout that leans on a separate paid hub for USB and DCB12. Treat all of it as directional, not proven, for the pairing you'd actually buyB0.
“Turns out the Apex 300's noise control is on par with the quietest power stations on the market, like those on offer from EcoFlow and DJI.”
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]
- Multiple independent reviewers describe the dual-fan cooling as noticeably quiet/even for a unit of this output class, even under load. [Apex 300 + B500K · 3 entries]
- Firmware and app updates have repeatedly caused mode-lock, download failures, or inverter error codes; several threads show the issue eventually resolved after further updates or support contact. [Apex 300 + B500K · 4 entries]
- When running multiple Apex 300 units or expansion batteries in parallel, owners report uneven charge rates between units, with community-devised (unofficial) workarounds needed to keep them in sync. [Apex 300 + B500K · 2 entries]
- The stripped-down, modular design draws criticism for real-world handling: extreme weight makes it hard to move, and lack of native USB/DC ports forces reliance on a separate paid hub accessory. [Apex 300 + B500K · 2 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
“Turns out the Apex 300's noise control is on par with the quietest power stations on the market, like those on offer from EcoFlow and DJI.”
The Solar Lab — "Bluetti Apex 300 Review: Cheap, Practical Home Backup?" · unknown · [positive]
- B2
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Techspective — "Bluetti Apex 300 with B300K Review" · 2025-09 · [positive]
- B7
“I updated my Apex 300 to the latest firmware yesterday. Now it's stuck in 'Backup' mode... when I go into the app to try to change it back, it flashes to...”
BLUETTI Community — "Apex 300 stuck in Backup mode after last firmware update" · 2025-11 · [negative]
- B8
“There was an update on my Apex 300 a few days ago IOT v8026.12... Problem is every time I connect to the power st[ation]... Edit - This seems fixed now hooray!”
BLUETTI Community — "Check For Update App issue" · 2025-09 · [mixed]
- B9
“After the update completed, the charging stopped and I received Error 004... I have error E004 Inverter Output Failure.”
BLUETTI Community — "Error E004 Apex 300" · 2025-11 · [negative]
- B11
“it's so heavy I can hardly carry it more than a few feet at a time and have been unable to lift it onto a table.”
T3 — "Bluetti Apex 300 review: transform your off-grid life" · 2025-11 · [negative]
- B12
“The Apex 300 doesn't have USB ports, DC ports, or much of anything beyond its six AC plugs and high-voltage connectors.”
The Solar Lab — "Bluetti Apex 300 Review: Cheap, Practical Home Backup?" · unknown · [negative]
- B13
“Fan noise remains even, with no distracting pitch or rattle. This makes the Apex 300 usable near sleeping areas or indoor workspaces without disturbance.”
Yanko Design — "BLUETTI Apex 300 Review" · 2025-05 · [positive]
Research compiled August 30, 2026.
Who Should Buy Which
Buy the SOLIX C300 DC if you…
- →You charge over USB or 12V and want it in a bag: phones, a laptop, a camera, a drone, a 12V cooler or fan, all fed from a 6.2-lb, 288Wh brickA1A3.
- →You want fast, high-wattage device charging, 140W out over USB-C, with the unit itself back to about 80% in an hour on PD 3.1A2.
- →Your entire load list is DC. If nothing you own ends in a three-prong plug, the missing inverter costs you nothing and saves you weight.
Buy the Apex 300 + B500K if you…
- →You're backing up your house: a 7,885Wh battery wired to carry a fridge, router, CPAP, and lights through a multi-day outage, on six real AC outlets with a UPS hand-off rated no worse than 10ms.
- →You want room to grow toward whole-home backup and will add BLUETTI expansion batteries instead of replacing the base unit.
- →You'll install it once and leave it. At 183 lbs it's a fixture, not a thing you carry, so pick the spot before it arrives.
If neither fits
If your power needs move and include AC appliances at the same time, a campsite coffee maker, a tailgate blender, a van microwave, buy neither. The C300 DC has no outlet to run them and the 183-lb Apex can't come with you. You want a mid-size portable with a real inverter and a handle, which is a different page than this one.
The Bottom Line
There's no winner here because there's no contest. The C300 DC is the right $200 answer for charging USB and 12V gear out of a 6-lb bag; the Apex 300 + B500K is the right $3,299 answer for a 7,885Wh home battery you wire in and leave. They overlap on exactly one job, a 100Wh afternoon of phones and a speaker, and even there the sensible pick is the light one, because the Apex's capacity is weight you'd carry for nothing.
So don't ask which is better; ask which sentence is you. Gear that charges over USB and 12V: the C300, and close the tab. Household AC through a blackout: the Apex, and buy it direct. A cooler and a blender at a campsite: neither, go find a mid-size portable with a handle and an outlet. The spec table on this page isn't scoring a race. It's a map of two different aisles, and your gear already knows which one it's in.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the Anker SOLIX C300 DC run a mini-fridge, a TV, or a coffee maker?
No, it has zero AC outlets. Its 300W rating is a DC total across USB and 12V, not an inverter, so anything with a wall plug never connects, at any wattage. For AC appliances you need a unit with an inverter, like the Apex 300 + B500K, or a mid-size portable with standard outlets.
Why does the BLUETTI Apex 300 + B500K cost 16 times more than the C300 DC?
Because it's a different class of device. You're paying for roughly 27 times the capacity (7,885Wh against 288Wh), a 3,840W inverter with six AC outlets, a UPS rated no worse than 10ms, and expandability toward home backup. The $3,299 versus $200 gap is really the gap between a device charger and an installed home battery.
Which one is cheaper to own over its life?
Per lifetime kilowatt-hour, the Apex, about 12 cents against the C300's 23, because it cycles far more energy before it's done. But that only pays off if you use home-scale loads; measured per warranty year the Apex runs about $660 to the C300's $67. For a device-charging workload the C300 is cheaper in every way you'd notice.
Is the C300 DC any good for CPAP?
Only for a low-draw, 12V-capable machine, and only for part of a night. In our overnight scenario it covers about three-quarters, 245Wh usable against the 320Wh needed, then it's empty. A humidified CPAP that expects a wall outlet won't start at all, since there isn't one. The Apex covers a CPAP night with thousands of watt-hours to spare.
Are these two actually competitors?
Not really, and that's the useful answer. One is a 6-lb DC charger for gadgets; the other is a 183-lb installed home-backup system. If you're weighing them against each other, decide first whether you need to charge devices off-grid or back up your house, and the choice makes itself.
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.
BLUETTI Apex 300 + B500K
$3,299.00
$3,299.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.