Head-to-head test
EcoFlow DELTA 3 Plus vs EcoFlow DELTA Pro
Scale wins this one: 2,576Wh more capacity is why the DELTA Pro clears every scenario on this page, and the DELTA 3 Plus's lighter body, quieter rating, and faster switchover only matter once you've already decided you don't need the room.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Plus
3,225Power Score · Appliance Class
$689.00 list · direct from EcoFlow
EcoFlow
DELTA Pro
5,338Power Score · The AC & Fridge Zone
$1,599.00 list · direct from EcoFlow
Spec deltas
The DELTA Pro is the one that doesn't run out. It carries 3,600Wh against the DELTA 3 Plus's 1,024Wh, and that gap is why the Pro wins every decided scenario on this page — an 8-Hour Blackout needs 1,645Wh, past what the 3 Plus can deliver, and a full Weekend Camping trip needs 2,100Wh, more than double what the smaller unit holds.
It also costs less to run. At $0.13 per lifetime kilowatt-hour against the 3 Plus's $0.17, the Pro is the cheaper unit to own even though its $1,599 price tag is more than double the 3 Plus's $689 up front. That's the trade a bigger battery makes: pay more to get in, pay less for every kilowatt-hour after that.
None of that makes the DELTA Pro the better-built machine. It's 99 lbs to the 3 Plus's 27, rated at 60dBA against 30, and takes under 20ms to switch over on an outage versus the 3 Plus's under 10ms — three areas where the newer, smaller unit is the more refined one, not the compromise. If your actual power draw never climbs past what the 3 Plus can hold, there's no reason to own 99 lbs of flagship you'll never fill.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
That refinement stops mattering the moment the job needs more energy than the 3 Plus holds. Remote Workday needs 910Wh, just under the 3 Plus's 1,024Wh rating on paper — but it's still a no, because usable capacity and inverter losses eat into that margin faster than the raw spec suggests. The DELTA Pro clears the same day with room to spare.
DELTA 3 Plus: 27 lbs, 30dBA, sub-10ms UPS switchoverDELTA Pro: 99 lbs, 60dBA, sub-20ms UPS switchover
Why it mattersIf your heaviest single day stays comfortably under four figures in watt-hours, the lighter, quieter, faster-switching unit is the right buy. Once it doesn't, none of that polish is worth carrying.
rated cycles
Divide sticker price by that lifetime throughput and the more expensive unit is the cheaper one to run: $0.13 per lifetime kWh for the Pro against $0.17 for the 3 Plus. The Pro's extra $910 at checkout buys a battery that's already ahead on a per-kWh basis before a single solar panel gets plugged in.
DELTA 3 Plus: $689, 1,024Wh, 4,000 rated cyclesDELTA Pro: $1,599, 3,600Wh, 3,500 rated cycles
Why it mattersA buyer choosing on sticker price alone picks the 3 Plus and pays more for every kilowatt-hour they actually use over its life. Choose on cost-per-use instead, and the Pro is already winning.
Reviewers report the 3 Plus's fans kick on even at low loads and cycle erratically rather than staying off, which undercuts the near-silent marketing and has been flagged as a possible firmware fix EcoFlow hasn't shipped yetA1A2A4. The Pro has its own real complaint — a noticeable, high-pitched whine once the load gets heavyB4 — but at least it's predictable: load goes up, noise goes up.
DELTA 3 Plus rated 30dBADELTA Pro rated 60dBA under load
Why it mattersDon't pick the 3 Plus for its dBA rating alone expecting silence at idle. Both units have a documented noise personality here, and they're different kinds of annoying, not different amounts.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: p2 wins every decided scenario (5 of 6) — the real-use-case core of the verdict.
Five of six scenarios here have a decided winner, and it's the same winner five times: the DELTA Pro. Weekend Camping needs 2,100Wh — more than double the 3 Plus's 1,024Wh — and an 8-Hour Blackout needs 1,645Wh, past what the smaller unit can deliver. Remote Workday is the closest call on paper: it needs 910Wh, just under the 3 Plus's 1,024Wh rating, and the 3 Plus still can't close it once real-world losses are counted.
CPAP Overnight (320Wh needed) and Tailgate Party (670Wh needed) are the only two the 3 Plus can technically run, and it does — both units clear them. The Pro still takes both scenarios by a wider comfort margin, which is the deciding factor, not a photo finish. Van Life Daily is the one nobody should buy either unit for: at 4,685Wh needed, both fall short, the Pro by far less but still short — that's a case for stacking expansion batteries or a dedicated van build, not a single box off the shelf.
Lifetime Value
Selected because: cheaperToOwn=p2 despite the higher sticker price — the economic core of the verdict.
cost / lifetime kWh
Even before cycles enter the picture, the Pro is the better deal per watt-hour of capacity: $0.44 against the 3 Plus's $0.67. Factor in the full lifetime — price divided by total energy delivered over the warranty — and the gap holds: $0.13 per kWh for the Pro against $0.17 for the 3 Plus, even though the Pro costs $910 more to buy ($1,599 vs $689, more than double). The reason is throughput, not price: at 3,600Wh and 3,500 rated cycles, the Pro is built to deliver 12,600 kWh over its life; the 3 Plus, despite 500 more rated cycles, only ever moves 4,096 kWh because it's working with a much smaller tank each time.
Cost per warranty year tells a different story worth being honest about: $138 a year for the 3 Plus against $320 for the Pro, because that's just price divided by the same 5-year term both units carry — it rewards the cheaper unit regardless of what it delivers. Use cost-per-lifetime-kWh to judge value; use cost-per-warranty-year only to size the check you're writing. The aggregate PowerScore agrees either way: 5,338 for the Pro against 3,225 for the 3 Plus, a 2,113-point gap built mostly on capacity and lifetime value.
What the Specs Don't Tell You
Selected because: all four firing gotchas favor the newer unit's polish — the honest counterweight to a capacity-only verdict.
rated cycles
All four Test Notes that fire on this pair point the same direction: toward the DELTA 3 Plus's newer-generation polish. It's 27 lbs to the Pro's 99, rated 30dBA to the Pro's 60, and switches over in under 10ms to the Pro's under 20ms — a lighter, quieter, faster-switching unit across the board.
The warranty note is really a price note wearing a warranty costume: both units carry the same 5-year term, so the $138-versus-$320-a-year gap is just the $910 price difference restated per year, not a difference in coverage. None of these four touch capacity, which is exactly why they don't flip the verdict — they're the honest case for the 3 Plus, not a rebuttal of the Pro's scenario sweep.
Growth Path
Selected because: both expand, but the Pro's higher solar ceiling makes it the stronger long-term platform.
solar input
Both units expand on EcoFlow's own battery add-ons, so 'expandable' isn't the differentiator here — the real gap is how fast each one refills what it's already got. The Pro accepts up to 1,600W of solar against the 3 Plus's 1,000W, 600W more, and that compounds with a battery that's already substantially bigger to begin with.
That makes the Pro the stronger platform to build on if the plan is ever to add expansion batteries or more panels. It's a bad reason to buy the Pro today if today's job is well within the 3 Plus's 1,024Wh — buy for the load in front of you, not the system you might build in three years.
Strengths & trade-offs
EcoFlow DELTA 3 Plus
Strengths
- +Costs $910 less
- +Lighter by 72 lb
Trade-offs
- –Weaker inverter (-1,800W) limits appliance compatibility.
EcoFlow DELTA Pro
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$910) than the DELTA 3 Plus.
- –Significantly heavier (+72 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 full weekend away needs 2,100Wh in this model — 241% of what the DELTA 3 Plus can supply, so it runs out. The DELTA Pro covers the same trip using 69% of its capacity, with real headroom left.
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
An 8-hour outage needs 1,645Wh — 189% of the DELTA 3 Plus's capacity, past what it can deliver. The DELTA Pro covers it at 54% of its capacity, using about half of what it holds.
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
DELTA Pro
Both units physically handle a CPAP night: 320Wh needed is 37% of the DELTA 3 Plus's capacity and 10% of the DELTA Pro's. Either one runs it; the Pro just does it with far more room left in the tank.
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
A remote workday needs 910Wh, just under the DELTA 3 Plus's 1,024Wh rating on paper — and it still comes up short at 105% of capacity once real-world losses are counted. The DELTA Pro runs the same day at 30% of its capacity.
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
DELTA Pro
A tailgate setup needs 670Wh: 77% of the DELTA 3 Plus's capacity and 22% of the DELTA Pro's. Both units cover it; the Pro does it with plenty of capacity still in reserve.
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 full van-life day needs 4,685Wh — well beyond either unit. The DELTA 3 Plus would need 538% of its capacity and the DELTA Pro 153%; neither closes that gap alone. This load calls for expansion batteries or a larger system, not a single unit as sold here.
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 4.2h.
$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 28, 2026
Verdict: the DELTA Pro, on Power Score margin
The DELTA Pro wins on the metric that decides ownership cost — $0.13 per lifetime kWh against the DELTA 3 Plus's $0.17 — and it clears every scenario on this page that has a decided winner, including two (Weekend Camping, 8-Hour Blackout) the 3 Plus can't touch at all. That holds even though the Pro costs $910 more upfront (more than double the 3 Plus's $689). The honest counterweight: the Pro is 99 lbs against 27, rated at 60dBA against 30, and switches over in under 20ms against the 3 Plus's under 10ms — three genuine refinements the newer, smaller unit has that the Pro doesn't. Buy the Pro for the capacity. Buy the 3 Plus only once you know your loads stay well under it, because none of its polish closes a 2,576Wh gap.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 28, 2026. The links below open EcoFlow's current price.
$1,599.00 list · direct from EcoFlow
or check the DELTA 3 Plus price$689.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 28, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): CPAP, Tailgating, Apartment Balcony, Camping.
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 Plus rates 4.4/5 (65th percentile of 24 Everyday-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.
99 Lbs Is a Two-Person Lift
The DELTA Pro weighs 99 lbs against the DELTA 3 Plus's 27 — nearly 3.7 times as much. That's built-in-wheels territory, not carry-it-yourself territory; the 3 Plus is light enough to move one-handed.
60dBA Under Load vs 30dBA Rated
The DELTA Pro is rated at 60dBA, double the DELTA 3 Plus's 30dBA rating. That's the spec difference; real-world fan behavior is a separate story for each unit, covered in the owner notes below.
Faster Switchover: Under 10ms vs Under 20ms
The DELTA 3 Plus switches to battery power in under 10ms; the DELTA Pro takes under 20ms — twice as long, though still fast enough that most electronics won't fault. For anything genuinely switchover-sensitive, the 3 Plus has the faster spec.
Same Warranty Term, Different Price Per Year
Both units carry a 5-year warranty. Priced against that term, the DELTA 3 Plus works out to $138 a year and the DELTA Pro to $320 — a gap that simply reflects the $910 difference in sticker price, not a difference in coverage.
Full record above — the Test Desk pick is the DELTA Pro.
Check DELTA Pro price →or check the DELTA 3 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 DELTA 3 Plus is cheaper to buy, but the DELTA Pro is cheaper to own. At $0.13/kWh over its lifetime vs $0.17/kWh, the DELTA Pro's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 3 Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 1,000W 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, but the DELTA Pro's higher solar ceiling (1,600W vs 1,000W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Plus
Owners consistently flag one real issue: the fans don't behave the way the near-silent marketing implies, kicking on even at low loads and cycling erratically instead of staying offA1A2.
The upside reviewers agree on is real too: fast recharge times and a UPS switchover under 10ms that keeps sensitive electronics from noticing a grid dropA3. Reviewers point out EcoFlow has patched fan behavior on other units after launch, so this reads as fixable rather than fundamentalA4.
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
Sources
thesolarlab.com
EcoFlow DELTA Pro
Owners treat the Pro as a proven home-backup platform, not a camping toy — the kind of unit that runs a fridge, lighting, and a space heater through a multi-day outage without dramaB1. Reviewers describe it serving as primary backup across multiple overnight outages spanning months, with the LFP chemistry expected to hold up over years of that kind of dutyB3.
The complaints are consistent too. Reviewers note it's heavy enough that the built-in wheels and telescoping handle matter, and that they really only work on flat ground, with uneven terrain wanting a cartB2. Under heavy load, reviewers call out a noticeable, high-pitched whine loud enough to notice in an otherwise quiet room, though it stays quiet enough at lighter drawsB4.
“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
- The DELTA 3 Plus's headline weakness is fan behavior — fans run even at low load and cycle erratically, undercutting its quiet-UPS marketing. [DELTA 3 Plus · 3 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
“Marketed as near-silent, but real-world fan performance is a significant flaw: the fans activate even under low loads and cycle on and off erratically, which limits its effectiveness as a quiet UPS.”
T3 — EcoFlow DELTA 3 Plus review: Lightning-fast charging with a noisy flaw; thesolarlab.com — DELTA 3 Plus Review · 2026 · [negative]
- A2
“Part of why it stays quiet is that the internal fans aren't always doing their job properly — the erratic cycling raises the risk of the unit overheating when running heavy loads.”
thesolarlab.com — EcoFlow DELTA 3 Plus Review: Amazing, but One Big Quirk? · 2026 · [negative]
- A3
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
T3 / thesolarlab.com — DELTA 3 Plus reviews · 2026 · [positive]
- A4
“Reviewers note EcoFlow should be able to resolve the fan behavior with a software update, as it has done for other power stations after release.”
thesolarlab.com — DELTA 3 Plus Review · 2026 (dated claim — may be partially addressed by firmware) · [mixed]
- 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 28, 2026.
Who Should Buy Which
Buy the DELTA 3 Plus if you…
- →You want backup for a CPAP, a router, a few lamps, and a laptop through an overnight outage — not a fridge and a space heater running at once. A CPAP night needs about 320Wh, well inside the 3 Plus's 1,024Wh, and at 27 lbs you can move it between bedroom and garage without a second person.
- →You'd rather have the newer switchover — under 10ms — and half the Pro's rated noise at 30dBA, and you can live with a real, documented catch: the fan doesn't stay silent at low loads, it cyclesA1A2. If that's a dealbreaker, a firmware fix is plausible given EcoFlow's track record on other unitsA4.
Buy the DELTA Pro if you…
- →You're running a fridge, a CPAP, lighting, and probably a space heater through a multi-day outage, or your camping trips look like a real Weekend Camping load — 2,100Wh in this model. The Pro is the only one of these two that clears that math, 3,600Wh against the 3 Plus's 1,024Wh, and owners back it up as a proven home-backup platform through real multi-day outagesB1B3.
- →You're also willing to trade weight for capacity. Ninety-nine pounds is a wheeled-cart job, not a one-hand carry, and reviewers confirm the built-in wheels really only work on flat groundB2. In exchange, you get a unit that costs 4 cents less per lifetime kWh than the smaller one, despite the bigger sticker price.
If neither fits
If your real load looks like Van Life Daily — 4,685Wh in a day, running a fridge, an induction cooktop, and everything else off one battery — skip both. The Pro would need roughly one-and-a-half times its own capacity to cover it, and the 3 Plus needs well over five times its own. That's a job for stacked expansion batteries or a purpose-built van system, not a single box off the shelf.
The Bottom Line
The DELTA Pro wins here because it has to: 2,576Wh more capacity, every decided scenario on this page, and a lower cost per lifetime kWh ($0.13 against $0.17) despite costing $910 more to buy. That's not close, and no amount of the 3 Plus's genuine polish — the lighter body, the quieter rating, the faster switchover — closes a capacity gap that size.
Buy the DELTA 3 Plus on purpose, once you already know your loads stay under about a kilowatt a day, not as a cheaper way to get 'a DELTA.' Buy the Pro when the job is real backup, and let the newer unit's polish be someone else's upgrade.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 3 Plus enough for a full weekend of camping?
Not on its own. A Weekend Camping load in our model needs 2,100Wh — more than double the 3 Plus's 1,024Wh capacity — so it runs out partway through. The DELTA Pro's 3,600Wh clears it with room left over. If you're set on the 3 Plus for camping, plan on a shorter trip, lighter loads, or a solar panel to refill during the day.
Why does the DELTA Pro cost less per kilowatt-hour if it's the pricier unit?
Because the metric divides total price by lifetime energy delivered, not just sticker price. The Pro is rated for 3,500 cycles at 3,600Wh, which works out to 12,600 kWh over its life; the 3 Plus, despite 4,000 rated cycles, only moves 4,096 kWh because each cycle holds so much less. Spread the Pro's $1,599 over that much more delivered energy and it comes out to $0.13 per kWh against the 3 Plus's $0.17.
Is the DELTA 3 Plus actually quiet?
It's rated quieter on paper — 30dBA against the Pro's 60 — but reviewers report the fans kick on even at low loads and cycle erratically instead of staying off, which is a different problem than steady noise. EcoFlow has patched fan behavior on other units post-launch, so this may be a firmware fix away from being resolved, but as shipped, don't assume silence at idle.
Can one person move the DELTA Pro?
At 99 lbs, not easily — its built-in wheels and telescoping handle are meant for exactly that, but reviewers note they only really work on flat, smooth ground; uneven terrain needs a cart. The 3 Plus, at 27 lbs, is the one you actually carry.
Do both units expand with add-on batteries?
Yes — both the 3 Plus and the Pro support EcoFlow expansion batteries, so 'expandable' isn't what separates them. The gap is solar input: the Pro accepts up to 1,600W against the 3 Plus's 1,000W, so it also refills faster as you scale up.
Where to buy
EcoFlow DELTA 3 Plus
$689.00
$689.00 list · direct from EcoFlow
EcoFlow DELTA ProPick
$1,599.00
$1,599.00 list · direct from EcoFlow
Prices may vary by retailer and are subject to change.