Head-to-head test
EcoFlow DELTA 3 Ultra vs BLUETTI Elite 400
The DELTA 3 Ultra costs $500 less, refills from the sun in about half the time, and carries nearly double the surge headroom — the Elite 400's only real advantage is 768Wh more capacity, which is exactly why it wins the two biggest scenarios on this page and nothing else.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Ultra
5,362Power Score · The AC & Fridge Zone
$1,299.00 list · direct from EcoFlow
BLUETTI
Elite 400
5,086Power Score · The AC & Fridge Zone
$1,399.00 list · direct from BLUETTI
Spec deltas
The DELTA 3 Ultra costs $500 less than the Elite 400 and still outscores it — 5,450 against 4,867 — on the strength of a much bigger solar ceiling and surge rating. Its 1,600W solar input is 600W ahead of the Elite 400's 1,000W, and its 7,200W surge is nearly double the Elite 400's 3,900W.
The Elite 400's answer is capacity: 3,840Wh against 3,072Wh, a 768Wh edge that's exactly why it wins the two scenarios that push closest to either unit's ceiling — Weekend Camping and an 8-Hour Blackout. Every lighter scenario tested is a tie, both units clearing the load with room to spare.
The DELTA 3 Ultra is also the expandable one — EcoFlow batteries bolt on to grow past 3,072Wh — where the Elite 400 is sealed at whatever it ships with. Between a $500 discount, a higher score, and a growth path, the case against the Elite 400 is unusually one-sided for a page where it still wins real scenarios.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
solar input
In a multi-day outage, recharge speed each day matters more than static capacity: the DELTA 3 Ultra owner spends half the daylight hours refilling and gets the rest of the day to actually use the power, while the Elite 400 owner is still waiting on the panel.
DELTA 3 Ultra: 1,600W solar, 3,072Wh capacityElite 400: 1,000W solar, 3,840Wh capacity
Why it mattersAnyone relying on solar to get through more than one day should weight the DELTA 3 Ultra's refill speed over the Elite 400's larger single-charge tank.
The lifetime-cost numbers confirm it: $0.10 per kWh against $0.15 for the Elite 400. A cheaper unit that also scores higher and costs less to run over its life is the exception on this site, not the rule.
DELTA 3 Ultra: $1,199, power score 5,450Elite 400: $1,699, power score 4,867p1 cost per lifetime kWh $0.10 vs p2 cost per lifetime kWh $0.15
Why it mattersUnless your load specifically clears 3,072Wh but not comfortably beyond it, the cheaper unit is also the better one here — there's no capability premium being paid for the Elite 400's price.
Both specs point the same direction for anything with a hard-starting compressor or sensitive electronics — a fridge, a sump pump, a desktop PC that can't tolerate a blip — the DELTA 3 Ultra starts the load with more headroom and drops power for less time doing it.
DELTA 3 Ultra: 7,200W surge, 10ms switchoverElite 400: 3,900W surge, 15ms switchover
Why it mattersBuyers running compressor-driven or UPS-critical gear get a real, measurable edge from the DELTA 3 Ultra that has nothing to do with capacity.
The specific dimensions that decide these two units — everything else is a tie.
PowerScore Breakdown
Selected because: DELTA 3 Ultra outscores the Elite 400 while costing $500 less — worth explaining why.
overall power score
5,450 against 4,867 is a real gap, and it's driven by specs that don't show up in a capacity number: the DELTA 3 Ultra's 7,200W surge, 1,600W solar input, and 10ms switchover all outpace the Elite 400 by wide margins.
The Elite 400 doesn't lose everywhere — it holds 768Wh more capacity — but a single spec advantage isn't enough to close a score gap built from three separate categories where the DELTA 3 Ultra leads.
Lifetime Value
Selected because: DELTA 3 Ultra costs two-thirds the Elite 400's price per lifetime kWh.
cost / lifetime kWh
At $1,199 against $1,699, the DELTA 3 Ultra costs $500 less upfront and delivers more total lifetime energy too — 12,288kWh against 11,520kWh — because its 4,000-cycle rating beats the Elite 400's 3,000. That works out to $0.10 per lifetime kWh against $0.15.
Warranty coverage ties at five years each, so this section comes down entirely to price, capacity, and cycle count — and all three favor the DELTA 3 Ultra.
Growth Path
Selected because: DELTA 3 Ultra is expandable; Elite 400 is sealed — a real structural difference.
solar input
The DELTA 3 Ultra accepts EcoFlow expansion batteries, so a buyer who outgrows 3,072Wh adds capacity rather than replacing the unit. The Elite 400 is sealed at 3,840Wh for the life of the unit.
Combined with the DELTA 3 Ultra's lower price and higher score, this is one of the more one-sided growth-path comparisons on the site — the Elite 400 doesn't have a counter here beyond its starting capacity edge.
What the Specs Don't Tell You
Selected because: Surge ratio, UPS speed, weight, warranty, and cycle life all fire for this pair.
rated cycles
Five gotchas fire on this pair. Surge ratio favors the DELTA 3 Ultra clearly — 7,200W against 3,900W — and its 10ms switchover beats the Elite 400's 15ms, both relevant to anything with a hard-starting compressor.
Weight and cycle life also lean toward the DELTA 3 Ultra — 77.2 lbs against 85, and 4,000 cycles against 3,000. Warranty ties at five years each, the one gotcha here that's genuinely a dead heat.
Brand Trust
Selected because: Cross-brand pair — EcoFlow vs BLUETTI support and ecosystem differences are worth surfacing.
EcoFlow runs the larger ecosystem and the faster-charging reputation, with the biggest community in the category and an app that rates well on both platforms. It's also the brand with a recent black mark: an October 2025 recall on the DELTA Max 2000 over an overheating risk, and a short-lived attempt at paywalling app features that the community pushed back on.
BLUETTI's reputation runs the opposite way — the best capacity-to-price ratio in the market and a tied-for-best app rating, but the most inconsistent customer support in the category, with real reports of slow, runaround-heavy service depending on where the unit was bought. Buying either brand direct from the manufacturer's own site tends to produce better support outcomes than third-party retailers.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra
Strengths
- +Costs $100 less
- +Lighter by 7.8 lb
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI Elite 400
Strengths
- +Larger battery capacity
Trade-offs
- –Weaker inverter (-1,000W) 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 3 Ultra'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
Elite 400
The Elite 400 wins this one on its capacity edge — 64% against 80% of the DELTA 3 Ultra's own capacity. Both units finish the trip; the Elite 400 just has more 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
Both survive, but the Elite 400 finishes at just 50% used. That's enough reserve for a second blackout night. The DELTA 3 Ultra at 63% leaves little margin if the outage runs longer than expected. In storm-prone areas, that remaining capacity is insurance.
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
Both are wildly overqualified for CPAP. You're using 12% or less. Save your money and buy whichever is cheaper; the extra capacity is completely wasted on a 40W overnight load. Put the savings toward a second battery for multi-night trips.
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 breaking a sweat. At these utilization levels, prioritize the unit with better USB-C output for direct laptop charging. It's more convenient than using the AC inverter and wastes less energy.
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
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
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
For this load: Elite 400 runs 15.9h vs 12.7h.
$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 14, 2026
Verdict: the DELTA 3 Ultra
Take the DELTA 3 Ultra. It costs $500 less, scores higher overall (5,450 against 4,867), charges from solar nearly twice as fast (1,600W against 1,000W), switches over faster (10ms against 15ms), and carries a 7,200W surge ceiling against 3,900W — all while being expandable, where the Elite 400 is sealed. The Elite 400's answer is 768Wh more capacity, which is real: it's the reason it wins Weekend Camping and an 8-Hour Blackout, the two scenarios closest to either unit's ceiling. Everywhere else — CPAP, Remote Workday, Tailgate Party — both units clear the load comfortably. Unless your load specifically sits right at that capacity edge, the cheaper, faster-charging, better-scoring unit is the one to buy.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 14, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,299.00 list · direct from EcoFlow
or check the Elite 400 price$1,399.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 14, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Tailgating.
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, DELTA 3 Ultra rates 5.0/5 (99th percentile of 25 Large-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.
Weight Reality Check
Neither unit is grab-and-go. The DELTA 3 Ultra (77.2 lbs) is manageable solo but heavier than a large checked suitcase. The Elite 400 (85 lbs) is noticeably heavier. That's a 8 lb difference.
One Grows, One Doesn't
The DELTA 3 Ultra accepts EcoFlow expansion batteries; the Elite 400 is sealed at 3,840Wh for good. Combined with its lower price, this is one of the more one-sided growth-path gaps on the site.
7,200W Against 3,900W
The DELTA 3 Ultra's surge ceiling is nearly double the Elite 400's — the spec that actually starts a hard-loading compressor rather than tripping the inverter.
10ms Against 15ms
Both switch over fast enough for most electronics, but the DELTA 3 Ultra's line-interactive 10ms beats the Elite 400's standby 15ms — worth knowing if you're running anything that can't tolerate even a brief blip.
4,000 Cycles Against 3,000
The DELTA 3 Ultra's longer cycle life is part of why it delivers more total lifetime energy than the Elite 400 despite holding less capacity per charge — 12,288kWh against 11,520kWh over each unit's rated life.
Full record above — the Test Desk pick is the DELTA 3 Ultra.
Check DELTA 3 Ultra price →or check the Elite 400 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
Both units have similar long-term ownership costs ($0.11/kWh vs $0.12/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
Brand trust
EcoFlow
Ecosystem
The largest lineup in portable power, spanning DELTA Pro, DELTA 3, and RIVER 3, plus solar panels and smart home panels.
Support
US-based phone, email, and chat support, though experiences are mixed — many report smooth prepaid-label replacements, others describe long waits or refurbished units sent back for new claims. Buying through Costco or Amazon tends to add a stronger return safety net.
Community
The biggest community in the category — a large dedicated subreddit, several Facebook groups, and an official forum.
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology in the category and the deepest expansion ecosystem, scaling up to a genuinely massive modular capacity on the flagship line.
Worth knowing
A recall on the DELTA Max 2000 in late 2025 over an overheating risk is worth knowing, as is a short-lived 2025 attempt to paywall advanced app features that the community pushed back on before it shipped broadly.
BLUETTI
Ecosystem
One of the broadest lineups in the category, from budget units to flagship models, plus specialized products like cold-weather sodium-ion batteries and vehicle solar hubs.
Support
The most inconsistent support experience in the category — heavily email-based with real reports of slow, runaround-heavy service, though outcomes tend to improve buying direct from the manufacturer.
Community
An active and growing community, second in size only to EcoFlow's.
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
The strongest capacity-to-price ratio in the market, full LiFePO4 standardization across the lineup, and an app that ties for the best rating in the category.
Worth knowing
Support inconsistency is the real risk with this brand — older or discontinued units can be hard to get parts for, so factor that into a long-hold purchase.
Analyst note
EcoFlow is the bigger, faster-moving ecosystem with a recent recall on its record; BLUETTI is the better raw value with the shakier support reputation. Neither issue is disqualifying on its own, but they're the two things worth knowing before you commit to either brand for the long haul.
Growth path
DELTA 3 Ultra
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,072Wh.
Accepts up to 1,600W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
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
Don't read the DELTA 3 Ultra's expandability as a straight win here: it starts at 3,072Wh, below the Elite 400's 3,840Wh, so a first expansion battery largely buys back capacity the Elite 400 already includes. It only pulls ahead if you'd grow past 3,840Wh — short of that, the Elite 400's larger fixed capacity is the simpler value.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra
Field data here mostly covers the higher-tier DELTA 3 Ultra Plus rather than the base Ultra tested on this page — EcoFlow's naming overlaps enough that several reviewers note the confusion themselves, so treat these as directionally representative rather than exact. With that caveat, reviewers consistently praise how quiet the fans stay even at maximum inverter output, describing it as never becoming annoying or distractingA1A2.
On UPS behavior, multiple testers report no dips or shutdowns when the wall power cut out — one reviewer with an engineering background compared the switchover favorably to dedicated APC battery backupsA5A6. The unit's substantial weight draws consistent comment too: reviewers call the body not lightweight by any standard, mitigated by a telescoping handle and well-placed grab pointsA10A14.
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
Sources
thesolarlab.com · postperspective.com · appleinsider.com · digitaltrends.com · popsci.com
BLUETTI Elite 400
At just under 86 lbs, the Elite 400 draws the same kind of weight callout as the DELTA 3 Ultra sitting across from it here — reviewers note it's actually lighter than some rivals its size, and it ships with wheels and a trolley rather than a bare handleB3.
Where it distinguishes itself is completeness: 3,900W surge, a 70-minute fast charge, and 15ms UPS switchover combine into what one review calls one of the most complete units at the 3,000Wh+ tier in 2026B2 — though reviewers are equally direct that just two AC sockets and no expansion path are the real compromises on an otherwise strong unitB4.
“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
- Reviewers consistently praise the quiet fan operation of the Ultra-tier unit compared to older EcoFlow models, though this is described in professional test conditions rather than long-term ownership. [DELTA 3 Ultra · 2 entries]
- UPS/switchover performance is repeatedly called seamless with no observed dips or shutdowns during power interruption tests. [DELTA 3 Ultra · 3 entries]
- The unit's substantial 74 lb weight is flagged across multiple reviews as a portability drawback, mitigated somewhat by wheels and handle design. [DELTA 3 Ultra · 2 entries]
- Build quality/durability (casing, cable, port covers) is repeatedly highlighted as premium and well-engineered. [DELTA 3 Ultra · 2 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
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A2
“Even when you're pushing the inverter to its maximum output, the fans never become annoying or distracting.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A5
“Over my career I have become accustomed to APC batteries immediately switching on when there is a power hit or power shut-off, and the EcoFlow Delta 3 Ultra Plus works in the exact same way.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A6
“I didn't experience any shut-offs or dips when I unplugged the EcoFlow from the wall.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A10
“Weighing in at a thunderous 74 pounds, the Ultra is not considered lightweight by any standards.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [mixed]
- A14
“The sturdy telescoping handle and wheels make it effortless to cart around, and if you do have to lift its admittedly somewhat hefty 74 lbs, grab handles are well placed for the task.”
popsci.com — EcoFlow DELTA 3 portable power station series first impressions · 2025-09-29 · [positive]
- 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 14, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra if you…
- →You want the better overall spec sheet for less money — lower price, higher score, faster solar recharge, and a real expansion path if your needs grow.
- →You're running compressor-driven or UPS-critical gear — the DELTA 3 Ultra's wider surge ceiling and faster switchover matter more than 768Wh of extra capacity.
Buy the Elite 400 if you…
- →Your load sits right at the edge of 3,072Wh — Weekend Camping and an 8-Hour Blackout are where the Elite 400's extra capacity is the difference between finishing and not.
- →You'd rather have a sealed, simpler system and don't expect to need an expansion battery later.
If neither fits
If your real need is full daily home backup, neither gets there alone — Van Life Daily needs more than either unit holds on its own. Look at a larger or genuinely expandable system built for that load, and let the DELTA 3 Ultra's own expansion port be the starting point rather than the ceiling.
The Bottom Line
This isn't close on the fundamentals: the DELTA 3 Ultra costs $500 less, scores higher, charges faster, surges harder, and can expand. The Elite 400's entire case is 768Wh more capacity, which happens to be exactly what it takes to win the two scenarios that push closest to either unit's ceiling.
Take the DELTA 3 Ultra unless your load specifically sits in that gap — Weekend Camping or an extended blackout right at the edge of 3,072Wh. Everywhere else, the cheaper unit is also the better one.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA 3 Ultra actually better than the Elite 400, or just cheaper?
Both — it costs $500 less and still scores higher overall (5,450 against 4,867), with faster solar charging, a bigger surge ceiling, and an expansion path the Elite 400 doesn't have. The Elite 400's one real edge is 768Wh more capacity.
Which one recharges faster from solar?
The DELTA 3 Ultra, by a wide margin — its 1,600W solar input is 600W ahead of the Elite 400's 1,000W, cutting a full refill from roughly 4 hours of sun down to about 2.
Can the DELTA 3 Ultra handle a weekend camping trip?
Yes, comfortably — a roughly 2,100Wh weekend load uses about 80% of its 3,072Wh capacity. The Elite 400 finishes the same trip with more room, at 64%, which is why it edges this specific scenario.
Which one is expandable?
The DELTA 3 Ultra. It accepts EcoFlow expansion batteries to grow past 3,072Wh; the Elite 400 is a sealed system fixed at 3,840Wh for its whole life.
Where to buy
EcoFlow DELTA 3 UltraPick
$1,299.00
$1,299.00 list · direct from EcoFlow
BLUETTI Elite 400
$1,399.00
$1,399.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.