Head-to-head test
Anker SOLIX C300 DC vs BLUETTI Elite 400
The Elite 400 wins every scenario tested here and costs less per lifetime kWh despite a $1,199 higher price tag — but at 85 lbs against 6.17 lbs, it's answering a different question than most people click this comparison to ask.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Anker
SOLIX C300 DC
1,621Power Score · Device Hub
$199.99 list · direct from Anker
BLUETTI
Elite 400
5,086Power Score · The AC & Fridge Zone
$1,399.00 list · direct from BLUETTI
Spec deltas
The BLUETTI Elite 400 covers every scenario tested on this page. The Anker SOLIX C300 DC covers none of them. That's less a review verdict than a fact about scale: 3,840Wh against 288Wh, a gap that shows up in almost every other spec too.
None of that makes the C300 DC a bad product. It's DC-only with no AC inverter, which is how it stays at 6.17 lbsA1; the Elite 400 is a 2,600W station built to sit inline as backup power, with a 15ms UPS switchover the C300 DC doesn't have at all. They're built for different jobs.
So the more useful question isn't who wins here — that part isn't close. It's which of these two jobs is actually yours, because the rest of this page only matters once you've answered that.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
That means price and portability arguments for the C300 DC only make sense once you've already ruled out every scenario this page tests — it isn't losing those scenarios on efficiency, it's a different class of device being asked to do a bigger device's job.
C300 DC: 288Wh capacity, 300W outputElite 400: 3,840Wh capacity, 2,600W outputCPAP Overnight requires about 320Wh
Why it mattersIf you need to run anything beyond charging handheld electronics, cross the C300 DC off before comparing another spec — the Elite 400, or something its size, is the real option.
cost / lifetime kWh
Paying $1,199 more upfront buys 13 times the capacity and cuts the cost of every kWh you actually use nearly in half, which only pays off if you put enough cycles on the unit to notice — casual device charging never gets there.
C300 DC: $199.99 price, $0.23 cost per lifetime kWhElite 400: $1,399.00 price, $0.12 cost per lifetime kWhBoth units rated for 3,000 cycles
Why it mattersBudget shoppers who'll mostly top off phones and laptops should stop at sticker price; anyone planning to cycle a station regularly should price it per kWh instead, and that number points at the Elite 400.
The undisclosed noise rating tells the same story from a different angle: BLUETTI publishes a dBA figure because the Elite 400 is meant to run near you for hours during an outage, and Anker doesn't bother because the C300 DC's job is charging, not sitting inline as backup power.
Elite 400: 15ms UPS switchoverC300 DC: no UPS spec, no AC inverterA1Elite 400 noise rated 30dBA; C300 DC noise not published
Why it mattersIf 'what happens the instant the power cuts out' is the actual question, it was never close — no capacity upgrade would have turned the C300 DC into a UPS, because that was never the product it set out to be.
Combined with a 6.17-lb body, that's a unit designed around a different rhythm: charge it from any USB-C brick you already own to 80% in about an hourA2, carry it anywhere, and repeat — not park it in a garage and let solar refill it over a day.
C300 DC max USB-C input: 140WElite 400 max USB-C input: 100WC300 DC weighs 6.17 lbs
Why it mattersIf the actual daily problem is 'my phone and laptop die while I'm out,' not 'the power went out at home,' the C300 DC's fast top-up and 6.17-lb carry weight solve that specific problem better than 3,840Wh of capacity you'd never touch.
The specific dimensions that decide these two units — everything else is a tie.
Portability & Form Factor
Selected because: 6.17 lbs vs 85 lbs is the single largest physical difference between these two, and the strongest honest case for the C300 DC.
weight
Eighty-five pounds is the kind of weight you roll, not carry, which is exactly why the Elite 400 ships with a built-in trolleyB2. The C300 DC weighs 6.17 lbs, light enough to hang off a backpack strap and forget about until a phone dies.
That's a 13.78-times gap, and it's arguably the most honest single number on this page: the scenario sweep and the lifetime-cost math both flow downstream of one unit being sized to sit in a garage and the other being sized to be carried.
Your Life, Your Pick
Selected because: The Elite 400 sweeps every decided scenario; readers need the reframe that this reflects category and size, not a close contest.
The Elite 400 wins Weekend Camping, the 8-Hour Blackout, CPAP Overnight, Remote Workday, and Tailgate Party — every scenario on this page with a winner. The closest the C300 DC gets is Tailgate Party, and 'closest' still means it runs out before the party's over.
The one scenario neither unit wins is Van Life Daily, which asks for about 4,685Wh in a day — more than the Elite 400's own 3,840Wh capacity. That's the tell: these scenarios are built around real loads, not around making one of these two products look good, and a 288Wh device charger was never going to clear even the lightest of them.
Lifetime Value
Selected because: Sticker price favors the C300 DC by 7x, but cost per lifetime kWh favors the Elite 400 — the real tension on this page.
cost / lifetime kWh
The C300 DC costs $199.99, the Elite 400 costs $1,399.00 — seven times as much for a unit most people will never come close to draining in a weekend. But priced per lifetime kWh, the gap flips: $0.23 for the C300 DC against $0.12 for the Elite 400, because both units are rated for the same 3,000 cycles and the Elite 400 is simply delivering far more energy per cycle.
That makes the Elite 400 the cheaper unit to actually run, not just the more capable one — but that math only matters if you cycle a station enough to care about cost per kWh. At $199.99, the C300 DC's bigger number is the sticker price, and for a lot of buyers that's the only number on this page that matters.
What the Specs Don't Tell You
Selected because: UPS, warranty length, weight, and an undisclosed noise spec are the concrete, checkable differences beyond raw capacity.
Beyond capacity, three concrete differences separate these: the Elite 400 has a 15ms UPS switchover and the C300 DC has none, the Elite 400's warranty runs 5 years against 3, and Anker doesn't publish a noise rating for the C300 DC while BLUETTI rates the Elite 400 at 30dBA. None of these are close calls — they're either present or they're not.
Weight belongs on this list too: 85 lbs against 6.17 lbs isn't a spec most buyers cross-shop consciously, but it's the one that decides whether the unit lives in a closet or a backpack.
Strengths & trade-offs
Anker SOLIX C300 DC
Strengths
- +Costs $1,199 less
- +Lighter by 78.8 lb
Trade-offs
- –Weaker inverter (-2,300W) limits appliance compatibility.
BLUETTI Elite 400
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$1,199) than the SOLIX C300 DC.
- –Significantly heavier (+78.8 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 six 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
Elite 400
A weekend of camping loads runs about 2,100Wh. That's more than eight times the C300 DC's entire capacity — this scenario was never in its weight class. The Elite 400 covers the same weekend on 64% of its charge, with a comfortable cushion left over.
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
Elite 400
An 8-hour blackout calls for roughly 1,645Wh. The C300 DC would need to be recharged and fully drained more than six times over to get there — it doesn't have the capacity to start. The Elite 400 gets through the same outage on about half its charge, with the rest still in reserve if the power stays out longer.
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
Elite 400
CPAP Overnight is the lightest ask on this page at 320Wh, and that alone is already 131% of what the C300 DC holds — even the smallest scenario here runs it dry before morning. The Elite 400 barely notices, spending about a tenth of its charge on a full night.
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
Elite 400
A remote workday of laptop, monitor, and phone charging adds up to about 910Wh — more than three and a half times the C300 DC's capacity. The Elite 400 spends barely a quarter of its charge and is ready to do the same thing again tomorrow.
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
Elite 400
A tailgate's worth of speaker, lights, and a small cooler adds up to about 670Wh, more than double the C300 DC's entire capacity, so it runs out before the tailgate does. The Elite 400 spends about a fifth of its charge and has plenty left for the drive home.
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
Van Life Daily asks for about 4,685Wh in a day. The Elite 400 needs about 144% of a full charge to cover it and the C300 DC needs more than nineteen times its own capacity — on this one scenario, the honest scorecard says no for both units, not just the smaller one.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six 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: Elite 400 runs 15.9h vs 1.2h.
$1,399 list · direct from BLUETTI
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–217.6hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–43.5hHigh-Draw Appliances
These reveal the real limitsscale 0–3.3h¹ 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
July 28, 2026
Verdict: the Elite 400, on Power Score margin
The Elite 400 wins every scenario tested on this page and is cheaper per lifetime kWh despite costing seven times more upfront — on raw capability and long-run value there's no real contest. The honest catch is that the contest is lopsided by design: at 85 lbs and $1,399, the Elite 400 is built for stationary backup, while the C300 DC's 6.17 lbs and $199.99 price exist for a grab-and-go, phone-and-laptop job the Elite 400 was never trying to do either. If your use case matches what this page tests — camping, blackouts, CPAP, a workday — take the Elite 400. If it doesn't, this verdict shouldn't be what decides it.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 28, 2026. The links below open Anker's and BLUETTI's current prices.
$1,399.00 list · direct from BLUETTI
or check the SOLIX C300 DC price$199.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 28, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, 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 4.2/5 (52nd percentile of 22 Personal-class units), and Elite 400 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.
85 Lbs Is a Commitment
The Elite 400 weighs 85 lbs, about 13.8 times the C300 DC's 6.17 lbs, and ships with a built-in trolley because it's meant to be rolled, not carried. Plan for wheels and a doorway path, not a backpack pocket.
Only the Elite 400 Has UPS Protection
The Elite 400 switches to battery in 15ms if the power cuts, fast enough that most electronics never notice. The C300 DC has no UPS mode — it's a charger you plug in, not a standby backup.
Warranty Value Comparison
3 years on the C300 DC, 5 on the Elite 400 — a 2-year gap that tracks the rest of the spec sheet. The longer warranty comes on the unit that's priced and built for a longer stationary hold; the C300 DC's shorter coverage matches its job as a lighter-duty, carry-it-everywhere tool.
SOLIX C300 DC: Noise Level Not Disclosed
Anker doesn't publish a dBA rating for the C300 DC. BLUETTI rates the Elite 400 at 30dBA. Neither number tells you what the fan does under your specific load, but only one of these two gives you a figure to start from.
Full record above — the Test Desk pick is the Elite 400.
Check Elite 400 price →or check the SOLIX C300 DC 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 DC is cheaper to buy, but the Elite 400 is cheaper to own. At $0.12/kWh over its lifetime vs $0.23/kWh, the Elite 400's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $0.11 less — check the Elite 400 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
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 (Apex 300, 3072Wh). 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. Full LFP standardization across lineup (3,500-6,000+ cycles). 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
Anker and BLUETTI are close competitors. Both have established support channels and growing ecosystems. Compare their specific warranty terms and community size for your peace of mind.
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.
Elite 400
FIXED CAPACITYFixed at 3,840Wh — a sealed, complete system. No expansion port, but that capacity already covers heavy and multi-day loads.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the Elite 400 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 DC
The C300 DC drops the AC inverter entirely to stay lightA1 — reviewers put it at about 6.2 lbs, with two USB-A ports, four USB-C ports, and a 12V car socket covering most device-charging needs at once. Two-way USB-C with PD 3.1 refills it to 80% in about an hourA2.
Owners on Best Buy praise the portability and describe running a fan for hours or getting several phone and laptop charges from a single chargeA3. The consistent framing across reviews is that this is a travel and device-charging tool, explicitly not meant for AC appliancesA4 — which matches everything else on this page.
“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 Elite 400
Reviewers frame the Elite 400 as BLUETTI's largest Elite-range unit: a 3,840Wh LFP battery with 2,600W continuous output and 3,900W of surge for harder startups, at a fixed capacity with no expansion pathB1. The combination reviewers keep coming back to is fast charging, a 15ms UPS mode, and a built-in trolley — together, one of the more complete units in its capacity class this yearB2.
The tradeoffs show up just as consistently: real weight that needs the included wheels, even though it's lighter than some rivals in its classB3, plus only two AC sockets and no way to add capacity later — enough that reviewers who otherwise rate it highly still call those out as compromisesB4.
“BLUETTI's largest Elite-range unit — a 3,840Wh LiFePO4 battery with 2,600W continuous output (3,900W Power Lifting), fixed at native capacity with no expansion.”
Sources
techradar.com · amazon.com · backuppowerhub.com · cleantechnica.com · notebookcheck.net · thesolarlab.com · edinburghnews.scotsman.co
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]
- Large 3,840Wh LFP capacity, fast charging, 15ms UPS, and a trolley are the praise; only two AC sockets, no expansion, and heavy weight are the caveats. [Elite 400 · 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
“BLUETTI's largest Elite-range unit — a 3,840Wh LiFePO4 battery with 2,600W continuous output (3,900W Power Lifting), fixed at native capacity with no expansion.”
techradar.com / amazon.com — Elite 400 review · 2026 · [mixed]
- B2
“Combines 3,840Wh LFP capacity, 3,900W surge, 70-minute fast charging, 15ms UPS protection, and a built-in trolley system — one of the most complete units at the 3,000Wh+ tier in 2026.”
backuppowerhub.com / cleantechnica.com — Elite 400 review · 2026 · [positive]
- B3
“A hefty ~86 lbs (39 kg), though reviewers note it's lighter than some competitors, with wheels and a trolley for mobility.”
notebookcheck.net / thesolarlab.com — Elite 400 review · 2026 · [mixed]
- B4
“Powerful, but reviewers flag only two AC sockets and no battery expansion as compromises — good but not quite as good as it could have been.”
techradar.com / edinburghnews.scotsman.com — Elite 400 review · 2026 · [mixed]
Research compiled July 28, 2026.
Who Should Buy Which
Buy the SOLIX C300 DC if you…
- →Buy the C300 DC if your actual problem is keeping phones, a laptop, a camera, or a small fan alive during a full day out — not powering a campsite or a blackout. At 6.17 lbs and $199.99, it's built to be carried and forgotten about until something needs a charge, and owners describe getting several device charges or hours of fan runtime out of itA3.
- →It's also the pick if you specifically want fast USB-C charging: 140W input tops it up to 80% in about an hour from a brick you probably already ownA2, instead of waiting on a wall charger.
Buy the Elite 400 if you…
- →Buy the Elite 400 if you need to actually run something for hours: a campsite, a CPAP overnight, a home office through a workday, or a blackout. It wins every one of those scenarios on this page outright, adds a 15ms UPS mode the C300 DC doesn't have, and reviewers rate it as one of the more complete units in its capacity class this yearB2.
- →It's also the better long-term math if you'll actually cycle it — $0.12 per lifetime kWh against the C300 DC's $0.23 — as long as the $1,399 upfront and 85 lbs of unit are things you're set up to handle.
If neither fits
Neither is right if your real need is Van Life Daily-scale power — about 4,685Wh a day is more than the Elite 400's own 3,840Wh capacity, so even the bigger unit here runs dry before you would. That's a job for a larger or expandable system, or solar sized to refill daily, not either of these two.
The Bottom Line
For anything on this page that means actually running something for hours — a campsite, a blackout, a CPAP, a full workday — the Elite 400 wins outright: more capacity, a UPS mode the C300 DC doesn't have, and a lower cost per lifetime kWh despite the $1,199 higher price. None of that makes the C300 DC the worse buy; it makes it a different one.
If you're actually choosing between these two for camping or blackout backup, you already have your answer. If your real problem is a phone and a laptop dying by mid-afternoon, buy the 6.17-lb one and spend the $1,199 you saved on something else entirely.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the Anker SOLIX C300 DC run a CPAP machine overnight?
No. The C300 DC skips the AC inverter entirely, so it only powers gear that accepts DC input directly, and most CPAP machines plug into AC. Even setting that aside, a full night of CPAP use runs about 320Wh and the C300 DC's entire capacity is 288Wh, so it's short before the inverter question even matters. The Elite 400 covers the same night on a small fraction of its charge.
Is the BLUETTI Elite 400 worth the extra money over the Anker SOLIX C300 DC?
If your use case needs what the Elite 400 does, yes. It costs $1,199 more upfront but works out to $0.12 per lifetime kWh against the C300 DC's $0.23, so it's the cheaper unit to actually run, not just the more capable one. That math only pays off if you need 3,840Wh of capacity and a 2,600W inverter in the first place — if you don't, the extra money isn't buying you anything you'll use.
How much heavier is the BLUETTI Elite 400 than the Anker SOLIX C300 DC?
About 79 lbs heavier: 85 lbs against 6.17 lbs, nearly 14 times the weight. The Elite 400 ships with a built-in trolley for exactly that reason; the C300 DC is light enough to carry with one hand or clip to a backpack.
Does the Anker SOLIX C300 DC have UPS or automatic battery backup switching?
No. Only the Elite 400 has that in this pair, switching to battery in 15ms when the power drops. The C300 DC has no switchover spec at all — it's built to be carried and plugged in, not to sit inline as silent backup power.
Anker SOLIX C300 DC vs BLUETTI Elite 400 — which one should I buy?
For camping, blackouts, CPAP backup, or a full remote workday, the Elite 400 wins every one of those scenarios outright and isn't close. For 'my phone and laptop die while I'm out all day,' 85 lbs and $1,399 is the wrong tool no matter what it can power — the C300 DC's 6.17 lbs and $199.99 price exist for exactly that problem instead. Match the unit to the problem, not the spec sheet.
Where to buy
Anker SOLIX C300 DC
$199.99
$199.99 list · direct from Anker
BLUETTI Elite 400Pick
$1,399.00
$1,399.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.