Head-to-head test
EcoFlow DELTA 3 Ultra vs EcoFlow DELTA Pro
The newer DELTA 3 Ultra is both cheaper and better-refined than the older DELTA Pro: $200 less, far quieter (30dB vs 60dB), 22 lbs lighter, a faster UPS, and more cycles — while the DELTA Pro counters only with more capacity (3,600Wh vs 3,072Wh), integrated wheels, and a proven home-backup track record.
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
EcoFlow
DELTA Pro
5,338Power Score · The AC & Fridge Zone
$1,599.00 list · direct from EcoFlow
Spec deltas
Unusually, the newer unit here is also the cheaper one. The EcoFlow DELTA 3 Ultra lists at $1,199; the older DELTA Pro at $1,399 — $200 more for what is, in most respects, the less refined machine. Both push 3,600W, surge to 7,200W, take 1,600W of solar, and expand with add-on batteries, so the fight is over capacity, refinement, and the specifics of living with 80-to-100 pounds of battery.
The DELTA 3 Ultra wins the refinements that matter day to day. It runs at 30dB to the Pro's 60dB — the difference between a quiet hum and a distracting whine in the same roomA1B4 — weighs 77 lbs to the Pro's 99, switches over in 10 ms to 20, lasts 4,000 cycles to 3,500, and costs a far better $0.39 per Wh against $0.72. It's cheaper up front and cheaper to own.
The DELTA Pro's case is capacity and pedigree. It holds 3,600Wh to the Ultra's 3,072 — about 528Wh, or 17%, more — rolls on integrated wheels rather than asking to be liftedB2, and has spent years as EcoFlow's gold-standard home-backup platformB1. But at $200 more for less quiet, more weight, and fewer cycles, it's the harder sell now.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
It undercuts the Pro by $200 while running at 30dB to the Pro's 60 — reviewers call the Ultra-tier quiet even under heavy loadA1, where the Pro's fans whine above 2,000WB4 — and weighs 22 lbs less.
Ultra $1,199 vs Pro $1,399Ultra 30dB vs Pro 60dBUltra 77.2 lbs vs Pro 99
Why it mattersFor a unit that lives in your home, the cheaper Ultra is also the more livable one.
rated cycles
It hands off in 10 ms to the Pro's 20, lasts 4,000 cycles to 3,500, and costs $0.39 per Wh of capacity against the Pro's $0.72 — reflecting newer, denser cells — so it's cheaper to own ($0.10 vs $0.11 per lifetime kWh) despite the older Pro's extra capacity.
Ultra 10 ms UPS vs Pro 20 msUltra 4,000 cycles vs Pro 3,500Ultra $0.39 per Wh vs Pro $0.72
Why it mattersOn backup response, longevity, and cost-to-own, the newer Ultra leads across the board.
Capacity
It holds 528Wh more (3,600 vs 3,072), rolls on integrated wheels and a telescoping handle rather than a straight liftB2, and has served as a reliable primary backup across months of outagesB3.
Pro 3,600Wh vs Ultra 3,072WhPro rolls on integrated wheels and a telescoping handleB2Pro has served as a reliable primary backup across months of outagesB1B3
Why it mattersFor maximum single-unit capacity, easy rolling, or a platform with a long proven history, the Pro still has a case — just a narrow one at $200 more.
Both cover a weekend, blackout, and workday with ease — the Pro's extra 528Wh giving it more headroom everywhere (54% used in a blackout to the Ultra's 63%) — and both expand for bigger jobs.
Both cover a weekend, blackout, and workday with easeThe Pro uses 54% in an 8-hour blackout vs the Ultra's 63%Both accept EcoFlow expansion batteries
Why it mattersFor the heaviest multi-day loads the Pro's larger base helps; for everyday backup, both have plenty, and the Ultra does it quieter and for less.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: Noise, weight, and UPS speed all break toward the cheaper Ultra.
rated cycles
The gotchas overwhelmingly favor the newer Ultra. Noise is the headline: 30dB against the Pro's 60dB — reviewers describe the Ultra-tier as quiet even under heavy loadA1, while the Pro's fans emit a noticeable high-pitched whine above about 2,000W that's distracting in a quiet roomB4. Every 10dB roughly doubles perceived loudness, so 60 against 30 is a different experience entirely, and decisive for indoor use.
The other two also break Ultra. It switches over as a UPS in 10 ms to the Pro's 20 — the tighter window for sensitive gear — and at 77 lbs it's 22 lighter than the Pro's 99. Both are heavy, but the Ultra is the easier lift, and the quieter, faster, cheaper unit on every count that fired here.
Lifetime Value
Selected because: The Ultra is cheaper up front and cheaper to own — the core story.
cost / lifetime kWh
This is where the comparison tilts hard. The DELTA 3 Ultra costs $200 less up front ($1,199 vs $1,399) and, thanks to a far better $0.39 per Wh (against $0.72) and a higher 4,000-cycle rating, it's also cheaper to own at $0.10 per lifetime kWh versus $0.11 — even though the Pro holds more capacity. You pay less to buy and less to run.
The Pro's only value argument is raw capacity: 528Wh more in the box. But it charges a $200 premium for it while giving up quiet, weight, cycles, and $/Wh. Unless you specifically need that extra 17% of capacity in a single unit and can't just expand the Ultra, the newer model is the clearly better economic choice.
Portability & Form Factor
Selected because: Both roll, but the Ultra's 22-lb-lighter body lifts easier.
weight
Both are big-battery heavy, but they solve it differently. The Ultra is 77 lbs and, per reviewers, substantial but not fragile, with well-placed grab handles and wheelsA9A14 — you can lift it in a pinch but usually roll it. The Pro is 99 lbs and rides on integrated wheels and a telescoping handleB2, so you roll it rather than lift it, at least on flat, smooth ground.
So the honest portability answer is terrain-dependent: for stairs, a truck bed, or uneven ground, the 22-lb-lighter Ultra is easier to manage; for wheeling across a garage or basement, both roll, and the gap narrows. Either way, the Ultra's lower weight is one more point in a column that's already stacked in its favor.
Growth Path
Selected because: Both expand equally, which undercuts the Pro's capacity edge.
Growth is a wash: both accept EcoFlow expansion batteries, so either scales past its base — the Ultra past 3,072Wh, the Pro past 3,600Wh — into a much larger home-backup bank without replacing the main unit. Neither locks you in or out.
That's worth stating plainly, because it undercuts the Pro's main remaining advantage: you don't need to buy the Pro to get more capacity — you can add a battery to the cheaper, quieter Ultra and pass its 3,600Wh base while staying ahead on noise, weight, and cost. Expandability turns the Pro's capacity edge from a reason to buy it into a reason you might not have to.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra
Strengths
- +Costs $300 less
- +Lighter by 21.8 lb
Trade-offs
- –No major technical downsides compared to rival.
EcoFlow DELTA Pro
Strengths
- +Larger battery capacity
Trade-offs
- –Significantly heavier (+21.8 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Can receive complaints about fan noise under heavy load.
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
DELTA Pro
A weekend (2,100Wh) fits on both, but the Pro's bigger 3,600Wh bank uses just 69% to the Ultra's 80% — more reserve for a longer trip. That said, at a campsite the Ultra's 30dB quiet and 22-lb-lighter body make it the nicer companion against the Pro's 60dB fans. More headroom versus more peace and less weight: the Ultra suits most trips, the Pro a power-hungry one.
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 ride out a full blackout comfortably — the Pro at 54%, the Ultra at 63%. For an overnight outage at home, the Ultra's near-silent 30dB operation, faster 10 ms UPS, and lower price make it the more discreet, sensible pick; the Pro has more reserve but announces itself under load. Either covers the outage — the Ultra just does it more pleasantly.
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 uses barely a tenth of either huge battery overnight, so capacity is irrelevant. This is all about quiet: the Ultra at 30dB is a genuine bedside unit, while the Pro's 60dB under any real load would be tough to sleep beside. For sleep-therapy backup, the cheaper, quieter Ultra is the clear choice.
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
A full work day draws about a third of either unit, so both cruise through with power to spare. The Ultra's quiet suits a home office and its lower price and weight ease the setup; the Pro does the same job with more reserve but more fan noise. For a desk you sit beside all day, the quieter Ultra wins.
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
Game day barely touches either at roughly a quarter of the battery. Both have massive headroom; the practical question is hauling them — both roll on wheels, but the Ultra is 22 lbs lighter to lift into a truck. Capacity is a non-issue for a single event, so the lighter, cheaper Ultra is the easier pick.
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
A van-life day wants about 4,685Wh, past either base — the Pro gets closer at 153% to the Ultra's 179%, thanks to its bigger bank. Both expand with add-on batteries to cover full-time van power, so for a serious rig start with the Pro's larger base or plan to expand the quieter, lighter Ultra. The base units alone won't do a full day.
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: DELTA Pro runs 14.9h vs 12.7h.
$1,599 list · direct from EcoFlow
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 0–204hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–40.8hHigh-Draw Appliances
These reveal the real limitsscale 0–3.1h¹ 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 12, 2026
Verdict: the DELTA 3 Ultra
The newer DELTA 3 Ultra is the clearer buy — it's cheaper AND more refined than the older DELTA Pro. For $200 less ($1,199 vs $1,399) it runs far quieter (30dB vs 60dBA1B4), weighs 22 lbs less (77.2 vs 99), switches over faster (10 ms vs 20), lasts more cycles (4,000 vs 3,500), and posts a much better $0.39 per Wh against $0.72 — landing cheaper to own too ($0.10 vs $0.11 per lifetime kWh). The DELTA Pro's counters are real but narrow: 528Wh more capacity (3,600 vs 3,072), integrated wheels to roll its 99 lbsB2, and years as EcoFlow's proven home-backup platformB1B3. Both take 1,600W of solar, 3,600W output, and expansion batteries. Lean DELTA 3 Ultra for price, quiet, weight, and refinement; the DELTA Pro only if you specifically want its extra capacity, wheels, or long track record.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 12, 2026. The links below open EcoFlow's current price.
$1,299.00 list · direct from EcoFlow
or check the DELTA Pro price$1,599.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 12, 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 DELTA Pro rates 3.9/5 (33rd 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.
77 Pounds vs 99 — Both Roll, One Lifts Easier
The DELTA 3 Ultra weighs 77 lbs; the DELTA Pro weighs 99 — a 22-lb gap. Both have wheels and telescoping handles, so on flat, smooth ground you roll either rather than lift it. But when the wheels can't help — stairs, a truck bed, uneven terrain — the Ultra's lighter body is meaningfully easier to manage. Neither is a one-hand carry; both are install-and-mostly-leave units. If yours will ever need lifting, the lighter, cheaper Ultra is the friendlier choice.
30dB vs 60dB — the Decisive Gap
This is the headline difference. The DELTA 3 Ultra is rated 30dB and reviewers call it quiet even under heavy load; the DELTA Pro is rated 60dB and its fans emit a noticeable high-pitched whine above about 2,000W that's distracting in a quiet room. Every 10dB is roughly a doubling of perceived loudness, so 60 against 30 is a different experience entirely. For a unit that lives indoors, near a desk, or beside a bed, the newer Ultra is in another class of livable — and it costs less.
10ms vs 20ms Switchover
The DELTA 3 Ultra flips to battery in 10 ms when the grid drops; the DELTA Pro takes 20 ms. Both keep a desktop, router, or CPAP running through an outage without interruption — reviewers saw no dips on the Ultra-tier — but the tighter 10 ms window is the safer margin for very sensitive electronics like a NAS or a workstation. It's a modest, newer-unit refinement, one more area where the cheaper Ultra edges the older Pro.
Full record above — the Test Desk pick is the DELTA 3 Ultra.
Check DELTA 3 Ultra price →or check the DELTA Pro 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 $0.13/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
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.
DELTA Pro
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,600Wh.
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.
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.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra
Reviewers of the DELTA 3 Ultra tier consistently praise its quiet — even pushed to maximum output, the fans never become annoying or distracting, a clear step up from older EcoFlow modelsA1A2 — and its UPS behavior, which one tester compared directly to a dedicated APC unit, switching on instantly with no dips when unplugged from the wallA5A6.
Build quality earns repeated marks as substantial and premium, from the casing to the sliding rear port coversA9A15, and while its weight is flagged as hefty, wheels and well-placed grab handles make it manageable to moveA14. Coverage of the base Ultra is still thin and overlaps with the Ultra Plus, so long-term owner data is limited.
“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
EcoFlow DELTA Pro
The DELTA Pro has spent years as a gold standard for home backup — built for high-draw appliances and full-scale expansion, running a fridge, lighting, and a space heater through outagesB1, and proven reliable across multiple overnight outages over months on its LFP cells rated for 10-plus years of daily useB3. Its integrated wheels and telescoping handle help move its considerable weight on flat groundB2.
The consistent knock is noise: under heavy 2,000W-plus draws the fans emit a noticeable high-pitched whine that's distracting in a quiet room, though it stays quieter at lighter loadsB4. It's a proven, capable workhorse whose main compromises — noise and weight — are exactly where the newer, cheaper Ultra pulls ahead.
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
Sources
backuppowerhub.com · us.ecoflow.co · outdoorgearlab.com · bobvila.com · powerstationadvisor.com · robbsutton.com
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]
- Established home-backup platform with wheeled portability and massive expandability; the consistent knock is fan noise under heavy load. [DELTA Pro · 3 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]
- A9
“It does not feel cheap or fragile. Everything from the outer shell case to the plastic buttons and the AC cable feels substantial and durable enough to withstand day-to-day wear and tear.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [positive]
- 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]
- A15
“I really love how the rear panel doors for the input ports slide into protective slots when in use.”
popsci.com — EcoFlow DELTA 3 portable power station series first impressions · 2025-09-29 · [positive]
- B1
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
backuppowerhub.com / us.ecoflow.com — EcoFlow DELTA Pro review · 2025-2026 · [positive]
- B2
“Heavy but wheeled — integrated wheels and a telescoping handle help move its considerable weight, though they work best on flat, smooth surfaces; a cart is needed for uneven ground.”
outdoorgearlab.com / bobvila.com — DELTA Pro-line review · 2025-2026 · [mixed]
- B3
“Reliable through extended outage use — served as primary backup across multiple overnight outages over months, powering essentials simultaneously; LFP battery rated for thousands of cycles and 10+ years of daily use.”
powerstationadvisor.com / robbsutton.com — DELTA Pro-line review · 2025-2026 · [positive]
- B4
“Not silent under heavy load — under 2000W-plus draws the fans emit a noticeable high-pitched whine that's distracting in a quiet room, though it runs quietly enough at lighter loads.”
outdoorgearlab.com — DELTA Pro-line noise testing · 2025-2026 · [negative]
Research compiled July 12, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra if you…
- →You want the better value — $200 cheaper and cheaper to own, at $0.39 per Wh vs $0.72.
- →You'll run it indoors or near people — 30dB vs the Pro's 60dB is decisiveA1.
- →You want the refined unit — 22 lbs lighter, a faster 10 ms UPS, and 4,000 cycles.
If neither fits
If you need to cover a full van-life day (4,685Wh), both fall short on the base — though the Pro's larger 3,600Wh gets closer, and either expands with add-on batteries to get there. For everyday backup, both have ample capacity.
The Bottom Line
The EcoFlow DELTA 3 Ultra is the clear winner here, because it's the rare newer model that's also cheaper. For $200 less than the DELTA Pro it delivers far quieter operation (30dB vs 60dBA1), 22 lbs less weight, a faster 10 ms UPS, more cycles, and a much better $/Wh — cheaper to buy and cheaper to own. As a modern, quiet, refined 3kWh unit, it's the easy call for most.
The DELTA Pro holds a narrow case: 528Wh more single-unit capacity, integrated wheels for its 99 lbs, and years as a proven home-backup workhorseB1B3. If you want maximum capacity in one box, easy rolling, or a platform with a long track record — and can accept the noise, weight, and $200 premium — it still delivers. But since the Ultra expands too, most buyers will be happier with the cheaper, quieter newer model.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 3 Ultra or DELTA Pro — which should I buy?
The DELTA 3 Ultra, and it's not especially close. It's $200 cheaper ($1,199 vs $1,399), far quieter (30dB vs 60dB), 22 lbs lighter, has a faster 10 ms UPS, more cycles (4,000 vs 3,500), and a much better $/Wh — cheaper to own, too. The older DELTA Pro holds more capacity (3,600Wh vs 3,072), has wheels, and is a proven platform. Buy the Ultra unless you specifically need the Pro's extra capacity or wheels.
Which is quieter?
The DELTA 3 Ultra, decisively — 30dB to the DELTA Pro's 60dB. Reviewers call the Ultra-tier quiet even under heavy load, while the Pro's fans whine noticeably above about 2,000W and can be distracting in a quiet room. If the unit will run in a living space, office, or bedroom, that difference alone is a strong reason to choose the Ultra — which also happens to be the cheaper unit.
Why is the older DELTA Pro more expensive?
Mostly capacity and legacy pricing. The Pro holds 528Wh more (3,600 vs 3,072Wh) and has long been EcoFlow's flagship home-backup unit, so it still commands $1,399 to the newer Ultra's $1,199. But the Ultra's newer cells give it better $/Wh, more cycles, far less noise, less weight, and a faster UPS — so you're paying more for the Pro's capacity while giving up nearly everything else.
Which has more capacity, and does it matter?
The DELTA Pro — 3,600Wh to the Ultra's 3,072, about 528Wh (17%) more. That shows up as longer runtimes and lower percentage draw on every task. But both handle a weekend, a blackout, or a workday easily, and both expand with add-on batteries — so you can add capacity to the cheaper, quieter Ultra rather than pay the Pro's premium for it. It matters most only if you want maximum capacity in a single box.
Where to buy
EcoFlow DELTA 3 UltraPick
$1,299.00
$1,299.00 list · direct from EcoFlow
EcoFlow DELTA Pro
$1,599.00
$1,599.00 list · direct from EcoFlow
Prices may vary by retailer and are subject to change.