Head-to-head test
Anker SOLIX C300 DC vs Anker SOLIX C300X
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
Anker
SOLIX C300 DC
1,735Power Score · Device Hub
$169.99 list · direct from Anker
Anker
SOLIX C300X
1,666Power Score · Device Hub
$299.99 list · direct from Anker
Spec deltas
Both carry the Anker name, but they're built for different buyers. The SOLIX C300 DC (288Wh, 300W) and the SOLIX C300X (288Wh, 300W) come from different product lines with different engineering priorities. We'd buy the SOLIX C300 DC.
The SOLIX C300X's 288Wh keeps a fridge going for 2 hours. The SOLIX C300 DC's 288Wh manages 2 hours. The bigger unit rides out a full weekend outage. The smaller one needs a recharge by Saturday night. But if your actual use case is camping, tailgating, or keeping devices charged, the SOLIX C300 DC does the job at 6.2 lbs and $170 — no overkill, no regret.
Pick the SOLIX C300 DC if you want maximum capability and room to grow. Go with the SOLIX C300X if you need the heavier-duty specs for demanding loads. Most buyers overlook this: the SOLIX C300 DC costs ~$0.2/kWh over its full lifespan, which adds up significantly over years of regular use. 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 C300 DC
At 300W, this unit is strictly for personal electronics (phones, laptops) and small CPAP machines. Do not expect to run kitchen appliances. At only 6.2 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 $130 less
- +Lighter by 2.8 lb
Trade-offs
- –No major technical downsides compared to rival.
Anker SOLIX C300X
At 300W, this unit is strictly for personal electronics (phones, laptops) and small CPAP machines. Do not expect to run kitchen appliances. At only 9 lbs, it is exceptionally portable. You can easily carry it one-handed to a campsite or tailgating party.
Strengths
- +Longer warranty
Trade-offs
- –Substantially more expensive (+$130) than the SOLIX C300 DC.
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 unit can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither unit can fully handle this scenario (needs 1,645Wh). You'd need a higher-capacity station or to cut back on usage.
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
Neither unit
Neither unit can fully handle this scenario (needs 320Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
Neither unit can fully handle this scenario (needs 910Wh). You'd need a higher-capacity station or to cut back on usage.
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 unit can fully handle this scenario (needs 670Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
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
Dead heat — both run this 205W load for roughly 1.2h. Pick on price, weight, or ports.
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 0–16.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–3.3hHigh-Draw Appliances
These reveal the real limits¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
July 10, 2026
Verdict: the SOLIX C300 DC
The SOLIX C300 DC outperforms the SOLIX C300X in key areas. It offers . Crucially, it costs $130 less, making it the smarter financial choice.
Overall score margin: 1,735 vs 1,666 (+4.1%)
List prices as of July 10, 2026. The links below open Anker's current price.
$169.99 list · direct from Anker
or check the SOLIX C300X price$299.99 list
Written by Wenny Zheng, Portable Power 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, CPAP, Tailgating.
Full specifications
| Specification | SOLIX C300 DC★ Our pick | SOLIX C300X |
|---|---|---|
| Price | $169.99 Check latest price | $299.99 Check latest price |
| Capacity (Wh) | 288 | 288 |
| Output (W) | 300 | 300 |
| Surge Peak | N/A | 600W |
| AC Outlets | 0 | 3 |
| USB-C Charging Outputs | 140W, 140W, 100W, 15W | 140W |
| Solar Input (W) | 100 | 100 |
| Weight (lbs) | 6.17 | 9 |
| UPS | No | Yes (10ms) |
| Charging Cycles | 3000 | 3000 |
| Chemistry | LiFePO4 | LiFePO4 |
| Warranty (Years) | 3 | 5 |
| Battery Expansion Feasibility | No | No |
| App Control | Yes | Yes |
| $/Watt Hour | $.59 | $1.04 |
| Noise Level (db) | N/A | 25 |
| Solar Input Type | XT-60 | XT-60 (11-28V) |
| USB-A Ports | 2 | 1 |
| USB-C Ports | 4 | 3 |
| Cost per Whᵈ | $0.59/Wh | $1.04/Wh |
ᵈ Derived: price ÷ rated capacity.
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.
Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Only the SOLIX C300X Has UPS Protection
The SOLIX C300X can act as an uninterruptible power supply. Plug your PC, router, or CPAP into it and it switches to battery seamlessly during an outage. The SOLIX C300 DC doesn't have this feature, so connected devices will experience a power interruption.
SOLIX C300 DC: Noise Level Not Disclosed
The SOLIX C300X publishes its noise level (25dB), but the SOLIX C300 DC doesn't. Brands that don't disclose noise specs often have louder units. If noise matters to you (CPAP users, apartment dwellers), this is worth investigating before buying.
Full record above — the Test Desk pick is the SOLIX C300 DC.
Check SOLIX C300 DC price →or check the SOLIX C300X 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.
| Metric | SOLIX C300 DC | SOLIX C300X |
|---|---|---|
| Purchase price | $169.99 | $299.99 |
| Lifetime energy delivery | 864 kWh | 864 kWh |
| Cost per lifetime kWh | $0.20 | $0.35 |
| Cost per warranty year | $57/yr | $60/yr |
| Battery lifespan | 8.2yr daily · 28.8yr weekends · 57.7yr weekly | 8.2yr daily · 28.8yr weekends · 57.7yr weekly |
Analyst note
The SOLIX C300 DC wins on both sticker price and long-term value. At $0.2/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Delivers each lifetime kWh for $0.15 less — check the SOLIX C300 DC price →
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.
SOLIX C300X
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.
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 SOLIX C300 DC gives you the larger ceiling); you can't add to either later.
The Bottom Line
The full picture comes down to this. The SOLIX C300 DC 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 C300X wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the SOLIX C300 DC nor the SOLIX C300X feels like the right fit, your power needs probably sit outside what these two target. If you're planning whole-home backup or running power-hungry appliances (electric heaters, window AC), you'll want a larger system in the 3,000–5,000Wh range with expansion battery support. Prices on portable power stations fluctuate frequently. Both Anker 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 SOLIX C300X worth $130 more than the SOLIX C300 DC?
No. At $130 more, the SOLIX C300X doesn't deliver enough upgrades to justify the premium. The specs are comparable, and the SOLIX C300 DC at $0.59/Wh is the smarter buy. We'd put the savings toward a quality solar panel, a carrying case, or extra cables.
Can I use the SOLIX C300X as a home UPS to protect my electronics during blackouts?
Yes. The SOLIX C300X has UPS mode with true 0ms switchover (double-conversion). Even hospital-grade equipment won't notice. Plug in your desktop PC, router, NAS, or CPAP machine and it switches to battery seamlessly when the grid drops. The SOLIX C300 DC does not have this feature. Without UPS, a blackout means: your PC reboots (potentially corrupting unsaved work), your NAS may corrupt its drive array, your CPAP alarms and wakes you up, and your security cameras go dark until you manually switch them over. If always-on power protection matters, this is a dealbreaker advantage for the SOLIX C300X.
Bottom line: should I buy the SOLIX C300 DC or the SOLIX C300X?
We'd buy the SOLIX C300 DC. Cheaper and more capable. That combination is rare. The SOLIX C300X doesn't offer a compelling reason to spend more unless you specifically need a feature unique to the Anker ecosystem (expansion batteries, app integrations). Otherwise, clear call.
Where to buy
Anker SOLIX C300 DCPick
$169.99
$169.99 list · direct from Anker
Anker SOLIX C300X
$299.99
$299.99 list · direct from Anker
Prices may vary by retailer and are subject to change.