Head-to-head test
EcoFlow DELTA Pro Ultra + 1 Battery vs Anker SOLIX F3800 PLUS
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Full profiles: EcoFlow DELTA Pro Ultra + 1 Battery → · Anker SOLIX F3800 PLUS →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The EcoFlow DELTA Pro Ultra + 1 Battery (12,288Wh) and Anker SOLIX F3800 PLUS (3,840Wh) 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? The DELTA Pro Ultra + 1 Battery has a slight edge, but the margin is close enough that your use case should break the tie.
What the spec gap means in practice: the DELTA Pro Ultra + 1 Battery's 7,200W inverter has the headroom for a window AC, a full-size fridge, and power tools. The SOLIX F3800 PLUS's 6,000W inverter still runs most single appliances; the DELTA Pro Ultra + 1 Battery's real edge is surge headroom for the biggest motor starts and stacking several heavy loads at once. On stamina, the DELTA Pro Ultra + 1 Battery keeps a fridge alive for roughly 70 hours vs the SOLIX F3800 PLUS's 22 hours. The cost? Portability. At 293.6 lbs, the DELTA Pro Ultra + 1 Battery is spread across boxes you site once and leave. The SOLIX F3800 PLUS at 132.3 lbs is more manageable, though still not light.
Pick the DELTA Pro Ultra + 1 Battery if your primary use is 8-hour blackout or remote workday. Go with the SOLIX F3800 PLUS 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 DELTA Pro Ultra + 1 Battery works out to about $0.12/kWh against the SOLIX F3800 PLUS's $0.23, a gap that compounds in the DELTA Pro Ultra + 1 Battery'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 + 1 Battery
With a massive 7,200W output (and 10,800W surge), the DELTA Pro Ultra + 1 Battery can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 293.6 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 $0.49 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 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$3,399) than the SOLIX F3800 PLUS.
- –Significantly heavier (+161.3 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
Anker SOLIX F3800 PLUS
With a massive 6,000W output (and 9,000W surge), the SOLIX F3800 PLUS can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 132.3 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- +Costs $3,399 less
- +Lighter by 161.3 lb
Trade-offs
- –Weaker inverter (-1,200W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the DELTA Pro Ultra + 1 Battery's 4,000, so it wears out sooner.
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: neither travels — the DELTA Pro Ultra + 1 Battery is 293.6 lbs and the SOLIX F3800 PLUS 132.3 lbs, and at those weights they roll off a truck bed if they go anywhere at all. 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
DELTA Pro Ultra + 1 Battery
Both survive the night. The DELTA Pro Ultra + 1 Battery finishes at 16% used with 8,800Wh left — 5.3 more nights like it. The SOLIX F3800 PLUS finishes at 50% with 1,619Wh, 98% of a second night. If your outages tend to run past one evening, that difference is the whole argument between them.
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 of these cover the night several times over — capacity isn't the question here. What would separate them is fan noise, but SOLIX F3800 PLUS 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
DELTA Pro Ultra + 1 Battery
The DELTA Pro Ultra + 1 Battery clears the workday at 9% used, banking 9,535Wh — late work, extra calls, or a second laptop charge without arithmetic. The SOLIX F3800 PLUS at 28% also finishes, with 2,354Wh of slack for the unplanned.
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: neither travels — the DELTA Pro Ultra + 1 Battery is 293.6 lbs and the SOLIX F3800 PLUS 132.3 lbs, and at those weights they roll off a truck bed if they go anywhere at all. 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 + 1 Battery
The SOLIX F3800 PLUS doesn't finish — 3,264Wh usable against the 4,685Wh this needs leaves it 1,421Wh short, about 69% of the scenario covered. The DELTA Pro Ultra + 1 Battery covers it with 5,760Wh 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: DELTA Pro Ultra + 1 Battery runs 51h vs 15.9h.
$5,999 list · direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sized →
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 0–696.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–139.3hHigh-Draw Appliances
These reveal the real limitsscale 0–10.4h¹ 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 + 1 Battery, on Power Score margin
These two units are closely matched on individual specs, but our Power Score analysis gives the DELTA Pro Ultra + 1 Battery the edge with a composite score of 10,655 vs 5,601.
Overall score margin: 10,655 vs 5,601 (+90.2%)
List prices as of July 10, 2026. The links below open EcoFlow's and Anker's current prices.
$6,199.00 · direct from EcoFlow
Last checked 28 days ago. Prices move — check before you buy.
or check the SOLIX F3800 PLUS price$2,599.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 10, 2026
Black Friday · 26 days out
Prices to beat:DELTA Pro Ultra + 1 Battery $5,814SOLIX F3800 PLUS $2,300
The lowest we have recorded for each. A Black Friday price above it is a sale that unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Solar Generator.
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 + 1 Battery rates 3.7/5 (21st percentile of 29 Whole-Home / Off-Grid-class units), and SOLIX F3800 PLUS rates 4.4/5 (63rd percentile of 20 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.
Weight Reality Check
Neither unit is grab-and-go. The SOLIX F3800 PLUS (132.3 lbs) is a two-person lift. The DELTA Pro Ultra + 1 Battery (293.6 lbs) is spread across its boxes — no single lift, but nothing you reposition on a whim. That's a 161 lb difference, and it is paid once — getting the heavier one into position, not every time you move it.
UPS Switchover: 0ms-rated vs ≤20ms
Both list a UPS mode, at different rated speeds. The DELTA Pro Ultra + 1 Battery is rated 0ms — a no-break design on paper, which is the maker's classification rather than a stopwatch result. The SOLIX F3800 PLUS 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. Worth saying because the per-dollar framing can suggest otherwise: the SOLIX F3800 PLUS works out at 1.9 years of cover per $1,000 spent against the DELTA Pro Ultra + 1 Battery's 0.8, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The DELTA Pro Ultra + 1 Battery is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. One caution reading years across different sizes: a cycle is 12,288Wh on the DELTA Pro Ultra + 1 Battery and 3,840Wh on the SOLIX F3800 PLUS, so count lifetime energy — roughly 49,152 kWh against 11,520 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 F3800 PLUS: Noise Level Not Disclosed
The DELTA Pro Ultra + 1 Battery publishes its noise level (30dB); the SOLIX F3800 PLUS doesn't publish one. That isn't evidence the SOLIX F3800 PLUS 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 + 1 Battery'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 F3800 PLUS before deciding.
Full record above — the Test Desk pick is the DELTA Pro Ultra + 1 Battery.
Check DELTA Pro Ultra + 1 Battery price →or check the SOLIX F3800 PLUS 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 F3800 PLUS is cheaper to buy, but the DELTA Pro Ultra + 1 Battery is cheaper to own. At $0.12/kWh over its lifetime vs $0.23/kWh, the DELTA Pro Ultra + 1 Battery's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $0.11 less — check the DELTA Pro Ultra + 1 Battery price →
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 top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further — flagship paths, not line-wide features.
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 + 1 Battery
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 5,600W 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 F3800 PLUS
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,840Wh.
Accepts up to 3,200W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
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, but the DELTA Pro Ultra + 1 Battery's higher solar ceiling (5,600W vs 3,200W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
The Bottom Line
The full picture comes down to this. The DELTA Pro Ultra + 1 Battery 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 F3800 PLUS wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the DELTA Pro Ultra + 1 Battery nor the SOLIX F3800 PLUS 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 DELTA Pro Ultra + 1 Battery worth $3,399 more than the SOLIX F3800 PLUS?
The short answer: yes, if you'll actually use the extra capability. The DELTA Pro Ultra + 1 Battery costs $3,399 more, but that premium buys you 8,448Wh more battery capacity (that's 48 extra hours of running a mini-fridge); 1,200W higher AC output (opening the door to more demanding appliances); a longer-lasting battery rated for 4,000 cycles — that's 11 years at daily use; 2,400W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.49/Wh vs $0.68/Wh. Factor in cycle life and the math flips: the DELTA Pro Ultra + 1 Battery costs $0.12/kWh over its lifetime vs $0.23/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
How does the 8,448Wh capacity difference actually affect daily use?
The DELTA Pro Ultra + 1 Battery's 12,288Wh battery keeps a mini-fridge running for roughly 70 hours vs the SOLIX F3800 PLUS's 22 hours. Both can handle a full 8-hour blackout setup (fridge + router + lights + phone charging ≈ 1,645Wh), but the DELTA Pro Ultra + 1 Battery 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 DELTA Pro Ultra + 1 Battery'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 DELTA Pro Ultra + 1 Battery, or is the SOLIX F3800 PLUS the only portable option?
Neither is "portable" in any hiking sense. The SOLIX F3800 PLUS (132.3 lbs) and the DELTA Pro Ultra + 1 Battery (293.6 lbs) are both appliances you place and leave. The 161.3-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 + 1 Battery accepts 5,600W vs the SOLIX F3800 PLUS's 3,200W 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 3.1 hours for the DELTA Pro Ultra + 1 Battery and 1.7 hours for the SOLIX F3800 PLUS. That gap widens on cloudy days, when the DELTA Pro Ultra + 1 Battery'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 + 1 Battery's advantage is substantial.
"4,000 vs 3,000 cycles" — what does that actually mean for me?
In real years: the DELTA Pro Ultra + 1 Battery (4,000 cycles) lasts 11.0 years at daily use, 38 years at weekend use (twice a week), or 167 years at twice-monthly camping trips. The SOLIX F3800 PLUS (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 12,288Wh unit becomes a ~9,830Wh unit. Still very usable. For weekend users, both batteries will outlast the warranty by years.
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. 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 + 1 Battery or the SOLIX F3800 PLUS?
We'd pay the premium for the DELTA Pro Ultra + 1 Battery. 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 F3800 PLUS is still solid if budget is the priority, but the DELTA Pro Ultra + 1 Battery will leave you less likely to wish you'd "gone bigger" six months from now. That regret costs more than the price difference.
Related comparisons
Where to buy
EcoFlow DELTA Pro Ultra + 1 BatteryPick
$6,199.00
$6,199.00 · direct from EcoFlow
Last checked 28 days ago. Prices move — check before you buy.
Anker SOLIX F3800 PLUS
$2,599.99
$2,599.99 · direct from Anker
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.