Head-to-head test
Anker SOLIX C800X vs BLUETTI Apex 300 + 2×B300K
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Full profiles: Anker SOLIX C800X → · BLUETTI Apex 300 + 2×B300K →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$449.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
$3,699.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The Anker SOLIX C800X (768Wh) and BLUETTI Apex 300 + 2×B300K (8,294Wh) sit in different weight classes. The real question: do your power needs justify the larger unit, or would you be overpaying for capacity that sits unused? These two aren't alternatives to each other. The Apex 300 + 2×B300K holds 11× the energy and costs 8× as much, so this comes down to the load you need to cover rather than which unit is better. If the SOLIX C800X carries your load, the Apex 300 + 2×B300K is capacity you pay for and never use; if it doesn't, no amount of saving makes the SOLIX C800X the answer.
What the spec gap means in practice: the Apex 300 + 2×B300K's 3,840W inverter has the headroom for a window AC, a full-size fridge, and power tools. The SOLIX C800X's 1,200W inverter handles a fridge and smaller tools fine, but a window AC or several big loads at once pushes past it. On stamina, the Apex 300 + 2×B300K keeps a fridge alive for roughly 47 hours vs the SOLIX C800X's 4 hours. The cost? Portability. At 213.9 lbs, the Apex 300 + 2×B300K is spread across boxes you site once and leave. The SOLIX C800X at 24 lbs is something one person can actually carry.
Pick the Apex 300 + 2×B300K if your primary use is 8-hour blackout or remote workday. Go with the SOLIX C800X if its specific strengths below line up better with your use. Most buyers stop at the sticker price and miss this: over a full lifespan the Apex 300 + 2×B300K works out to about $0.07/kWh against the SOLIX C800X's $0.2, a gap that compounds in the Apex 300 + 2×B300K's favor the more you cycle it. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
Bench Notes
What each unit does well, where it falls short, and the trade-offs that matter.
Anker SOLIX C800X
The 1,200W inverter handles most daily devices like laptops, blenders, and TVs, but will struggle with heating elements that require over 1500W. At only 24 lbs, it is exceptionally portable. You can easily carry it one-handed to a campsite or tailgating party. A standout feature is the value proposition: at roughly $0.59 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Costs $3,249 less
- +Lighter by 189.9 lb
Trade-offs
- –Weaker inverter (-2,640W) limits appliance compatibility.
- –Sealed capacity — the Apex 300 + 2×B300K can add batteries to grow past 768Wh; this one can't.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Apex 300 + 2×B300K's 6,000, so it wears out sooner.
BLUETTI Apex 300 + 2×B300K
With a massive 3,840W output (and 7,680W surge), the Apex 300 + 2×B300K can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 213.9 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion. A standout feature is the value proposition: at roughly $0.45 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$3,249) than the SOLIX C800X.
- –Significantly heavier (+189.9 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
Neither unit
Neither gives you a powered weekend: the Apex 300 + 2×B300K has the energy but doesn't travel, and the SOLIX C800X covers about 31% of the 2,100Wh. 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 + 2×B300K
The SOLIX C800X doesn't finish — 653Wh usable against the 1,645Wh this needs leaves it 992Wh short, about 40% of the scenario covered. The Apex 300 + 2×B300K covers it with 5,405Wh 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
Either unit
A CPAP is about 40W for eight hours, so both cover the night with room to spare and capacity decides nothing. Fan noise would — but SOLIX C800X doesn't publish a figure, so there's nothing to hold it to. Buy on price, weight, and whether you can live with a fan you haven't heard.
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 + 2×B300K
The SOLIX C800X doesn't finish — 653Wh usable against the 910Wh this needs leaves it 257Wh short, about 72% of the scenario covered. The Apex 300 + 2×B300K covers it with 6,140Wh 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
The Apex 300 + 2×B300K at 213.9 lbs is not a take-along — it rolls off a truck bed if it travels at all. The SOLIX C800X actually goes, and lands within 3% of the 670Wh — trim one appliance and it does the job alone. That trimmed kit is the honest answer here; the Apex 300 + 2×B300K was never in this scenario at all.
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 + 2×B300K
The SOLIX C800X doesn't finish — 653Wh usable against the 4,685Wh this needs leaves it 4,032Wh short, about 14% of the scenario covered. The Apex 300 + 2×B300K covers it with 2,365Wh 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
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: Apex 300 + 2×B300K runs 34.4h vs 3.2h.
$3,699 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 0–470hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–94hHigh-Draw Appliances
These reveal the real limitsscale 0–7.1h¹ 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 10, 2026
Verdict: the Apex 300 + 2×B300K, on Power Score margin
These two units are closely matched on individual specs, but our Power Score analysis gives the Apex 300 + 2×B300K the edge with a composite score of 7,590 vs 2,341.
Overall score margin: 2,341 vs 7,590 (−224.2%)
List prices as of July 10, 2026. The links below open Anker's and BLUETTI's current prices.
$3,699.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
or check the SOLIX C800X price$449.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 10, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, Home Backup, CPAP, Solar Generator, Tailgating, 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.
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 C800X rates 4.4/5 (63rd percentile of 20 Compact-class units), and Apex 300 + 2×B300K rates 3.4/5 (7th 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 + 2×B300K: 213.9 lbs Is a Commitment
At 213.9 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 + 2×B300K: 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 C800X: Fixed Capacity
The SOLIX C800X is sealed at 768Wh — fine if that covers you, but it's the ceiling. By contrast the Apex 300 + 2×B300K can add expansion batteries, though the first thing it has over the SOLIX C800X is its own 8,294Wh base — expansion is the step after that, for the buyer who would outgrow 8,294Wh as well.
Surge Power: Inverter Quality Indicator
The Apex 300 + 2×B300K has a 2× surge-to-continuous ratio vs the SOLIX C800X's 1.3×, and the higher absolute ceiling with it — 7,680W against 1,600W. At 2× it clears the 2× rule of thumb for absorbing motor startups — fridges, AC compressors and power tools briefly draw 2-3× their rated wattage. What decides whether a given motor starts is the ceiling, not the ratio: the SOLIX C800X still surges to 1,600W, so check the startup draw of the heaviest thing you plan to run against that figure rather than assuming it trips.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The Apex 300 + 2×B300K is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The SOLIX C800X is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The Apex 300 + 2×B300K'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. Worth saying because the per-dollar framing can suggest otherwise: the SOLIX C800X works out at 11.1 years of cover per $1,000 spent against the Apex 300 + 2×B300K's 1.4, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The Apex 300 + 2×B300K 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 8,294Wh on the Apex 300 + 2×B300K and 768Wh on the SOLIX C800X, so count lifetime energy — roughly 49,766 kWh against 2,304 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 C800X: Noise Level Not Disclosed
The Apex 300 + 2×B300K publishes its noise level (45dB); the SOLIX C800X doesn't publish one. That isn't evidence the SOLIX C800X 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 + 2×B300K'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 C800X before deciding.
Full record above — the Test Desk pick is the Apex 300 + 2×B300K.
Check Apex 300 + 2×B300K price →or check the SOLIX C800X 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 C800X is cheaper to buy, but the Apex 300 + 2×B300K is cheaper to own. At $0.07/kWh over its lifetime vs $0.2/kWh, the Apex 300 + 2×B300K's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $0.13 less — check the Apex 300 + 2×B300K 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 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
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 C800X
FIXED CAPACITYFixed at 768Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 300W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Apex 300 + 2×B300K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 8,294Wh.
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 C800X is sealed at 768Wh, which is fine if that covers you. The Apex 300 + 2×B300K starts at 8,294Wh and can grow beyond it with BLUETTI expansion batteries — real headroom the SOLIX C800X doesn't have if your needs climb toward partial-home backup.
The Bottom Line
The full picture comes down to this. The Apex 300 + 2×B300K edges ahead on our overall analysis, but the margin is narrow enough that your specific use case should drive the decision. Review the scenario verdicts above — if the SOLIX C800X wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the SOLIX C800X nor the Apex 300 + 2×B300K feels like the right fit, your power needs probably sit outside what these two target. Use our comparison tool above to explore alternatives that better match your specific wattage and runtime requirements. Prices on portable power stations fluctuate frequently. Both Anker and BLUETTI discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Apex 300 + 2×B300K worth $3,249 more than the SOLIX C800X?
The short answer: yes, if you'll actually use the extra capability. The Apex 300 + 2×B300K costs $3,249 more, but that premium buys you 7,526.4Wh more battery capacity (that's 43 extra hours of running a mini-fridge); 2,640W higher AC output (opening the door to more demanding appliances); a longer-lasting battery rated for 6,000 cycles — that's 16 years at daily use; 2,100W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.45/Wh vs $0.59/Wh. Factor in cycle life and the math flips: the Apex 300 + 2×B300K costs $0.07/kWh over its lifetime vs $0.20/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
How does the 7,526.4Wh capacity difference actually affect daily use?
The Apex 300 + 2×B300K's 8,294.4Wh battery keeps a mini-fridge running for roughly 47 hours vs the SOLIX C800X's 4 hours. Where it really matters: during an 8-hour blackout running your fridge, router, lights, AND charging your phone simultaneously (about 1,645Wh total), the Apex 300 + 2×B300K handles it while the SOLIX C800X runs dry. What specs don't mention: runtime drops 20-30% in cold weather (below 32°F/0°C) as battery chemistry slows down. The Apex 300 + 2×B300K's extra capacity provides a critical cold-weather buffer. For occasional phone and laptop charging, both are overkill. This gap only matters for sustained, multi-appliance use.
Can I actually carry the Apex 300 + 2×B300K, or is the SOLIX C800X the only portable option?
At 24 lbs, the SOLIX C800X is manageable for one person over short distances: parking lot to campsite, trunk to tailgate. The Apex 300 + 2×B300K at 213.9 lbs? You'll want a buddy, a wagon, or wheels. For reference, 213.9 lbs is about the weight of a bag of concrete. If your use case involves any carrying, the SOLIX C800X wins decisively.
How fast can each unit recharge from solar panels in real conditions?
On paper, the Apex 300 + 2×B300K accepts 2,400W vs the SOLIX C800X's 300W of solar input. What the spec sheet won't tell you: solar panels typically deliver only 60-80% of their rated output due to panel angle, cloud cover, and temperature. In realistic conditions, expect full recharge in about 4.9 hours for the Apex 300 + 2×B300K and 3.7 hours for the SOLIX C800X. That gap widens on cloudy days, when the Apex 300 + 2×B300K's higher input ceiling captures more of whatever sunlight is available. One more thing: summer gives you ~7 productive solar hours per day. Winter drops to ~4. If solar is your primary recharge method, the Apex 300 + 2×B300K's advantage is substantial.
"6,000 vs 3,000 cycles" — what does that actually mean for me?
In real years: the Apex 300 + 2×B300K (6,000 cycles) lasts 16.4 years at daily use, 58 years at weekend use (twice a week), or 250 years at twice-monthly camping trips. The SOLIX C800X (3,000 cycles): 8.2 years daily, 29 years weekends, or 125 years twice-monthly. What most people miss: hitting the cycle limit doesn't kill your battery. Capacity drops to about 80%. Your 8,294.4Wh unit becomes a ~6,636Wh unit. Still very usable. For weekend users, both batteries will outlast the warranty by years.
What if I need more capacity than the SOLIX C800X's 768Wh later?
The SOLIX C800X is sealed at 768Wh, so if you expect your needs to climb, the Apex 300 + 2×B300K is the more future-proof pick: it starts at 8,294.4Wh and adds BLUETTI-compatible batteries without replacing the base unit. That said, "not expandable" isn't a flaw on its own — if 768Wh comfortably covers your loads, the SOLIX C800X is a complete unit, not a downgrade.
Is Anker or BLUETTI more reliable for long-term ownership?
Both brands have strengths and trade-offs. Anker: 5-year warranty standard on portable stations, 10-year on home energy systems. Historically very reliable, though some recent firmware updates have altered product functionality without notice or rollback option. BLUETTI: 2-6 years depending on model (up to 10 years on home backup systems). Response times vary significantly. Some reports of units being deemed unrepairable with no parts available for older models. One piece of advice from the power station community: regardless of brand, buy from Costco or Amazon. Their return policies provide a safety net that manufacturer warranties alone can't match, especially for a product you'll rely on in emergencies. Both brands use LFP (lithium iron phosphate) batteries in their current lineup, the most proven chemistry for longevity and safety.
Bottom line: should I buy the SOLIX C800X or the Apex 300 + 2×B300K?
We'd pay the premium for the Apex 300 + 2×B300K. Yes, it costs more. The capability jump is real: you're stepping into a tier that handles appliances the base model can't start. The SOLIX C800X is still solid if budget is the priority, but the Apex 300 + 2×B300K will leave you less likely to wish you'd "gone bigger" six months from now. That regret costs more than the price difference.
Where to buy
Anker SOLIX C800X
$449.99
$449.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
BLUETTI Apex 300 + 2×B300KPick
$3,699.00
$3,699.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.