Head-to-head test
EcoFlow DELTA Pro Ultra X vs Anker SOLIX E10 + 3×B6000
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Full profiles: EcoFlow DELTA Pro Ultra X →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$7,999.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
Anker
SOLIX E10 + 3×B6000
13,772Power Score · Whole-Home Capable
$8,299.00 · direct from Anker
Last checked 43 days ago. Prices move — check before you buy.
Spec deltas
The EcoFlow DELTA Pro Ultra X (12,288Wh) and Anker SOLIX E10 + 3×B6000 (18,432Wh) 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? We'd buy the DELTA Pro Ultra X.
What the spec gap means in practice: the SOLIX E10 + 3×B6000's 7,680W inverter has the headroom for a window AC, a full-size fridge, and power tools. The DELTA Pro Ultra X's 12,000W inverter still runs most single appliances; the SOLIX E10 + 3×B6000's real edge is surge headroom for the biggest motor starts and stacking several heavy loads at once. On stamina, the SOLIX E10 + 3×B6000 keeps a fridge alive for roughly 104 hours vs the DELTA Pro Ultra X's 70 hours. The cost? Portability. At 450.6 lbs, the SOLIX E10 + 3×B6000 is spread across boxes you site once and leave. The DELTA Pro Ultra X at 298.7 lbs is more manageable, though still not light.
Pick the DELTA Pro Ultra X if your primary use is van life daily. Go with the SOLIX E10 + 3×B6000 if you want the option to add expansion batteries later. Most buyers stop at the sticker price and miss this: over a full lifespan the SOLIX E10 + 3×B6000 works out to about $0.11/kWh against the DELTA Pro Ultra X's $0.19, a gap that compounds in the SOLIX E10 + 3×B6000'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.
EcoFlow DELTA Pro Ultra X
With a massive 12,000W output (and 45,000W surge), the DELTA Pro Ultra X can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 298.7 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- +Costs $300 less
- +Lighter by 151.9 lb
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
Anker SOLIX E10 + 3×B6000
With a massive 7,680W output (and 1,000,090W surge), the SOLIX E10 + 3×B6000 can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 450.6 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
Trade-offs
- –Significantly heavier (+151.9 lbs), making it harder to move.
- –Weaker inverter (-4,320W) limits appliance compatibility.
- –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
Scoring these two at a campsite is a category error: the DELTA Pro Ultra X at 298.7 lbs is not a take-along — it rolls off a truck bed if it travels at all, and the SOLIX E10 + 3×B6000 is installed at the electrical panel — it backs up the building and doesn't leave it. The 2,100Wh here is trivial for either — it's the going that doesn't happen. If you need power away from the building, you're shopping the wrong class.
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
Either unit
Both survive the blackout with similar margin, and both list a UPS mode — compare their stated switchover classes, and remember those are manufacturer ratings, not measurements.
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 E10 + 3×B6000 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
Either unit
Both power your workstation all day without strain. The DELTA Pro Ultra X lists 100W of USB-C for direct laptop charging; the SOLIX E10 + 3×B6000 carries no USB-C at all, so a laptop there goes through the inverter — which is what a hardwired stack is: the power comes out of your wall sockets, not out of the box.
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
Scoring these two at a tailgate is a category error: the DELTA Pro Ultra X at 298.7 lbs is not a take-along — it rolls off a truck bed if it travels at all, and the SOLIX E10 + 3×B6000 is installed at the electrical panel — it backs up the building and doesn't leave it. The 670Wh here is trivial for either — it's the going that doesn't happen. If you need power away from the building, you're shopping the wrong class.
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
DELTA Pro Ultra X
The SOLIX E10 + 3×B6000 is installed at the electrical panel — it backs up the building and doesn't leave it, so this scenario belongs to the DELTA Pro Ultra X by default — and it earns it, covering the 4,685Wh with 5,760Wh to spare. Capacity was never the SOLIX E10 + 3×B6000's problem here; getting to a van build was.
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: SOLIX E10 + 3×B6000 runs 76.4h vs 51h.
$8,299 list · direct from Anker
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 0–1044.5hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–208.9hHigh-Draw Appliances
These reveal the real limitsscale 0–15.7h¹ 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
July 10, 2026
Verdict: the DELTA Pro Ultra X
The DELTA Pro Ultra X takes it on balance: 4,320W more output than the SOLIX E10 + 3×B6000, against 6,144Wh less capacity. It costs $300 less as well and weighs 151.9 lbs less, which makes it the easier call.
Overall score margin: 12,800 vs 13,772 (−7.6%)
List prices as of July 10, 2026. The links below open EcoFlow's and Anker's current prices.
$7,999.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the SOLIX E10 + 3×B6000 price$8,299.00 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
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, DELTA Pro Ultra X rates 4.3/5 (61st percentile of 29 Whole-Home / Off-Grid-class units), and SOLIX E10 + 3×B6000 rates 4.0/5 (39th 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.
Weight Reality Check
Neither unit is grab-and-go. The DELTA Pro Ultra X (298.7 lbs) is spread across its boxes — no single lift, but nothing you reposition on a whim. The SOLIX E10 + 3×B6000 (450.6 lbs) is a wall-installed system — its weight matters to the installer on day one, then never again.
Surge Power: Inverter Quality Indicator
The DELTA Pro Ultra X has a 3.8× surge-to-continuous ratio vs the SOLIX E10 + 3×B6000's 1.3×, and the higher absolute ceiling with it — 45,000W against 10,000W. At 3.8× 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 E10 + 3×B6000 still surges to 10,000W, so check the startup draw of the heaviest thing you plan to run against that figure rather than assuming it trips. One caution on reading the two together: the DELTA Pro Ultra X's figure is an instantaneous peak and the SOLIX E10 + 3×B6000's is a figure rated for 90 minutes rather than an instant, so they are not the same measurement and the gap between them is partly a difference in what each maker chose to publish.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The DELTA Pro Ultra X is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The SOLIX E10 + 3×B6000 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.
SOLIX E10 + 3×B6000: Noise Level Not Disclosed
The DELTA Pro Ultra X publishes its noise level (30dB); the SOLIX E10 + 3×B6000 doesn't publish one. That isn't evidence the SOLIX E10 + 3×B6000 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 DELTA Pro Ultra X's 30dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the SOLIX E10 + 3×B6000 before deciding.
Full record above — the Test Desk pick is the DELTA Pro Ultra X.
Check DELTA Pro Ultra X price →or check the SOLIX E10 + 3×B6000 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 DELTA Pro Ultra X is cheaper to buy, but the SOLIX E10 + 3×B6000 is cheaper to own. At $0.11/kWh over its lifetime vs $0.19/kWh, the SOLIX E10 + 3×B6000's higher cycle life and capacity make each dollar go further over the years.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
Tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
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.
Analyst note
EcoFlow positions itself as a mid-to-premium brand with stronger support infrastructure, while Anker competes on value. The question is whether the EcoFlow ecosystem and support premium is worth it for your use case.
Growth path
DELTA Pro Ultra X
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 12,288Wh.
Accepts up to 10,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
SOLIX E10 + 3×B6000
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 18,432Wh.
Accepts up to 9,000W of solar. Enough for a serious multi-panel array.
Limited ports. You'll likely need a power strip or splitter.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
The Bottom Line
The full picture comes down to this. The DELTA Pro Ultra X 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 E10 + 3×B6000 wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the DELTA Pro Ultra X nor the SOLIX E10 + 3×B6000 feels like the right fit, your power needs probably sit outside what these two target. For lighter use — weekend camping or phone/laptop charging — you'd be overpaying for capacity you'll rarely tap. Consider a unit in the 500–1,500Wh range instead. Prices on portable power stations fluctuate frequently. Both EcoFlow and 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 E10 + 3×B6000 worth $300 more than the DELTA Pro Ultra X?
The short answer: yes, if you'll actually use the extra capability. The SOLIX E10 + 3×B6000 costs $300 more, but that premium buys you 6,144Wh more battery capacity (that's 35 extra hours of running a mini-fridge); a longer-lasting battery rated for 4,000 cycles — that's 11 years at daily use. On a cost-per-watt-hour basis, you're paying $0.45/Wh vs $0.65/Wh. Factor in cycle life and the math flips: the SOLIX E10 + 3×B6000 costs $0.11/kWh over its lifetime vs $0.19/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
How does the 6,144Wh capacity difference actually affect daily use?
The SOLIX E10 + 3×B6000's 18,432Wh battery keeps a mini-fridge running for roughly 104 hours vs the DELTA Pro Ultra X's 70 hours. Both can handle a full 8-hour blackout setup (fridge + router + lights + phone charging ≈ 1,645Wh), but the SOLIX E10 + 3×B6000 finishes with significantly more margin. That matters if conditions aren't ideal or the outage runs long. What specs don't mention: runtime drops 20-30% in cold weather (below 32°F/0°C) as battery chemistry slows down. The SOLIX E10 + 3×B6000'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 SOLIX E10 + 3×B6000, or is the DELTA Pro Ultra X the only portable option?
Neither is "portable" in any hiking sense. The DELTA Pro Ultra X (298.7 lbs) and the SOLIX E10 + 3×B6000 (450.6 lbs) are both appliances you place and leave. The 151.9-lb difference matters when loading into a vehicle or moving between rooms, but that's about it. If true portability is your priority, look at units under 20 lbs in a different class entirely.
How fast can each unit recharge from solar panels in real conditions?
On paper, the DELTA Pro Ultra X accepts 10,000W vs the SOLIX E10 + 3×B6000's 9,000W 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 1.8 hours for the DELTA Pro Ultra X and 2.9 hours for the SOLIX E10 + 3×B6000. That gap widens on cloudy days, when the DELTA Pro Ultra X'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 DELTA Pro Ultra X's advantage is substantial.
Is EcoFlow or Anker more reliable for long-term ownership?
Both brands have strengths and trade-offs. EcoFlow: Mixed. 2-5 years depending on model (DELTA Pro Ultra line gets 10 years). Some users report smooth claims; others report runarounds. Register your product to extend coverage. 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. 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 DELTA Pro Ultra X or the SOLIX E10 + 3×B6000?
We'd buy the DELTA Pro Ultra X. Strong value at a lower price, and for most real-world use cases the spec gaps don't translate to meaningful capability gaps. The SOLIX E10 + 3×B6000 makes sense only if you specifically need its higher capacity for demanding sustained loads like full-home backup or commercial use.
Related comparisons
Where to buy
EcoFlow DELTA Pro Ultra XPick
$7,999.00
$7,999.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
Anker SOLIX E10 + 3×B6000
$8,299.00
$8,299.00 · direct from Anker
Last checked 43 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.