Head-to-head test
EcoFlow DELTA 3 Max Plus vs EcoFlow DELTA Pro 3
This is the same EcoFlow platform scaled up: 4,096Wh instead of 2,048Wh, 4,000W instead of 3,000W, $1,300 more — so the only real question is whether your scenarios need that extra capacity or you're paying for headroom that sits unused in the garage.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Max Plus
4,312Power Score · Appliance Class
$1,099.00 list · direct from EcoFlow
EcoFlow
DELTA Pro 3
5,693Power Score · The AC & Fridge Zone
$2,399.00 list · direct from EcoFlow
Spec deltas
The DELTA Pro 3 is the DELTA 3 Max Plus's platform pushed to its next size: 4,096Wh against 2,048Wh, 4,000W continuous against 3,000W. It wins four of six real-world scenarios tested here, and not narrowly.
The DELTA 3 Max Plus isn't a lesser product forced to lose, though. It's cheaper to buy, cheaper to own per lifetime kWh, and less than half the weight at 50.7 lbs against the DELTA Pro 3's 112.4. For a CPAP overnight, a remote workday, or a tailgate, it does the job with capacity left over and nothing to apologize for.
Where it genuinely comes up short is headroom: Weekend Camping alone needs 2,100Wh, more than its entire 2,048Wh pack holds before inverter losses. That's the actual decision here — not brand, not warranty length (both get 5 years), but whether your real routines ever ask for more than 2,048Wh at once.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
The DELTA Pro 3's 4,096Wh pack isn't just bigger, it's the difference between a trip that runs the battery down to nothing on night two and one that finishes the weekend at 60% used, with room to spare.
Weekend Camping scenario needs 2,100Wh totalDELTA 3 Max Plus rated capacity is 2,048Wh
Why it mattersIf weekend camping is the actual use case, the DELTA 3 Max Plus is the wrong unit outright, not just the tighter one — size up, or plan to recharge mid-trip.
continuous output
It doesn't change what either unit can actually start, though. Both cap at the identical 6,000W in absolute terms, so a compressor surge that pushes toward that ceiling gets through on either box just the same. The ratio is a real, measurable difference — it just isn't the one that decides whether your fridge kicks on.
DELTA 3 Max Plus: 3,000W continuous output, 6,000W surge ceilingDELTA Pro 3: 4,000W continuous output, 6,000W surge ceiling — the same cap
Why it mattersDon't let the surge-ratio spec sheet talk you into the smaller unit if you actually need the DELTA Pro 3's extra continuous output or capacity. In practice, the surge headroom is a wash.
cost / lifetime kWh
The gap is real but small: $0.13 against $0.15, and both units share the same 4,000-cycle LiFePO4 platform, so the economics were never going to diverge much. The $1,300 you'd pay for the DELTA Pro 3 isn't buying a better investment per watt-hour. It's buying 2,048Wh more capacity and 1,000W more continuous output.
DELTA 3 Max Plus: $1,099 to buy, $0.13 per lifetime kWhDELTA Pro 3: $2,399 to buy, $0.15 per lifetime kWh
Why it mattersIf lifetime cost-per-kWh is your deciding factor, the math doesn't push you toward the bigger unit — buy the DELTA Pro 3 for the extra capacity and output themselves, not as a value play.
weight
Both units expand on the same EcoFlow battery ecosystem, so neither locks you into today's capacity forever. But the DELTA Pro 3's weight makes where-it-lives a one-time decision, since a two-person lift isn't something you repeat for fun — the DELTA 3 Max Plus can still move with you if your setup changes.
DELTA 3 Max Plus weighs 50.7 lbsDELTA Pro 3 weighs 112.4 lbs
Why it mattersIf you relocate the unit often — garage to driveway to camper — the DELTA 3 Max Plus's 50.7 lbs is the more honest fit before price even enters the conversation. If it's going into one spot and staying, the DELTA Pro 3's weight stops mattering the day it's installed.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Four of six real-world scenarios split cleanly on capacity headroom — this is where the two units actually diverge for a buyer's real week.
Run the two units against six real routines and the DELTA Pro 3 wins four outright: Weekend Camping, the 8-Hour Blackout, Remote Workday, and Tailgate Party. The DELTA 3 Max Plus isn't just behind on paper — Weekend Camping needs 2,100Wh, more than its entire 2,048Wh pack holds before inverter losses even apply. That's a hard fail, not a close one.
The exceptions matter as much as the wins. CPAP Overnight is 320Wh — 18% of the smaller unit's usable capacity — so both units are absurd overkill and the honest move is to buy on price and weight, not runway. Van Life Daily needs 4,685Wh a day; even the DELTA Pro 3 alone comes up short at 135% of usable capacity. That's not a knock on either unit, it's a sign the scenario needs an expansion battery, not a bigger single box.
What the Specs Don't Tell You
Selected because: Three real gotchas fire: a genuine weight commitment, a surge-ratio reversal that favors the smaller unit, and a warranty-per-dollar gap — none obvious from a spec-sheet skim.
The weight gotcha is the least surprising and the most real: 112.4 lbs is more than double the DELTA 3 Max Plus's 50.7, which is the line between a solo carry and a two-person lift. Wherever the Pro 3 lands, that's where it stays.
The surge-ratio gotcha is the one worth slowing down for. Both units cap at the identical 6,000W surge ceiling, but the DELTA 3 Max Plus gets there off a 3,000W continuous rating — a 2x cushion — while the DELTA Pro 3 gets there off 4,000W, a 1.5x cushion. In absolute terms neither buyer loses anything; a compressor surge tops out at the same 6,000W either way. It's a reminder that a bigger continuous number doesn't automatically mean a proportionally bigger inverter, not a reason to downgrade.
The warranty gotcha is simpler. Both carry the same 5-year term, but priced per year of coverage it's $220 for the DELTA 3 Max Plus and $480 for the DELTA Pro 3. The length is identical. The price of it isn't.
Lifetime Value
Selected because: The DELTA 3 Max Plus is cheaper to buy and to own per kWh, which cuts against the instinct to assume the pricier unit is the better long-term investment.
cost / lifetime kWh
The DELTA 3 Max Plus wins the value argument twice over: $1,099 against $2,399 at checkout, and $0.13 against $0.15 per lifetime kWh once you spread the price across a full 4,000-cycle life. Both numbers point the same direction, which is unusual — normally the cheaper unit and the better-value unit are different products.
The gap in the second number is small on purpose: both units run the same LiFePO4 chemistry rated for the same 4,000 cycles, so the economics were always going to converge. The $1,300 price difference isn't buying a better investment per watt-hour delivered. It's buying 2,048Wh more capacity and 1,000W more continuous output, full stop.
Growth Path
Selected because: Both expand on the same EcoFlow battery ecosystem, so growth isn't a yes/no question here — it's about solar ceiling and where the extra capacity actually goes.
solar input
Both units expand on EcoFlow's own battery ecosystem, so neither buyer is locked into today's capacity — this isn't a fixed-vs-expandable argument, it's a bigger-vs-smaller one. The real growth-path difference is solar: a 1,000W ceiling on the DELTA 3 Max Plus against 2,000W on the DELTA Pro 3, exactly double, which means the Pro 3 can absorb a bigger panel array as your setup grows.
Read that as what it is: a same-platform step-up, not two products with different destinies. Anyone planning to outgrow 2,048Wh should expect to land on DELTA Pro 3-class capacity eventually, expansion batteries and all — the DELTA 3 Max Plus's growth path tops out lower because it starts lower.
PowerScore Breakdown
Selected because: The power score gap roughly tracks the price gap, worth checking against whether the buyer's actual use case needs that much headroom.
overall power score
The DELTA Pro 3 posts a 5,693 power score against the DELTA 3 Max Plus's 4,312 — a gap that roughly tracks the price gap between them. That's not a coincidence; the score is built from the same capacity, output, and surge numbers that cost the extra $1,300.
Treat the score as a headroom number, not a quality number. Both units use the same EcoFlow platform, the same 4,000-cycle chemistry, and the same 5-year warranty term — the higher score isn't a better-engineered unit, it's a bigger one. Whether that's worth paying for comes down to the scenarios above, not the score itself.
Strengths & trade-offs
EcoFlow DELTA 3 Max Plus
Strengths
- +Costs $1,300 less
- +Lighter by 61.7 lb
Trade-offs
- –Weaker inverter (-1,000W) limits appliance compatibility.
EcoFlow DELTA Pro 3
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$1,300) than the DELTA 3 Max Plus.
- –Significantly heavier (+61.7 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
DELTA Pro 3
Two nights off-grid needs 2,100Wh. That's already more than the DELTA 3 Max Plus's rated 2,048Wh, before inverter losses even enter the picture — it lands at 121% of usable capacity and comes up short. The DELTA Pro 3 covers the same weekend at 60%, with plenty of the battery still untouched when you pack up.
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 3
An 8-hour outage with a fridge, router, and lights running needs 1,645Wh. The DELTA 3 Max Plus can technically cover it, but at 94% of usable capacity there's almost nothing left if the outage runs long or the fridge cycles harder than expected. The DELTA Pro 3 finishes the same night at 47%, with a full margin still in reserve.
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
An overnight CPAP load is 320Wh — 18% of the DELTA 3 Max Plus's usable capacity and 9% of the DELTA Pro 3's. Both units are massive overkill for this alone. If CPAP is genuinely the only job, the DELTA 3 Max Plus does it for $1,300 less and at less than half the weight, 50.7 lbs against 112.4.
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 3
A full remote workday — laptop, monitor, router, phone — draws 910Wh. The DELTA 3 Max Plus uses 52% of usable capacity to get there; the DELTA Pro 3 uses 26%, so most of the battery is still fresh when the laptop closes.
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 3
Blender, TV, speaker, and phones for a few hours at the tailgate needs 670Wh — 38% of the DELTA 3 Max Plus's usable capacity, 19% of the DELTA Pro 3's. Neither unit is stressed, so this one comes down to what you'd rather carry across a parking lot: 50.7 lbs or 112.4.
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 day of van life — a fridge running around the clock, plus a laptop, lights, and a fan — needs 4,685Wh. That's 269% of the DELTA 3 Max Plus's usable capacity and still 135% of the DELTA Pro 3's alone. Both are expandable, so the real answer for full-time van life is a DELTA Pro 3 plus at least one expansion battery, not a bigger single box.
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 3 runs 17h vs 8.5h.
$2,399 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 0–232.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–46.4hHigh-Draw Appliances
These reveal the real limitsscale 0–3.5h¹ 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 3, on Power Score margin
The DELTA Pro 3 takes it: it comfortably wins four of six real-world scenarios (Weekend Camping, the 8-Hour Blackout, Remote Workday, Tailgate Party) where the DELTA 3 Max Plus either fails outright or finishes with barely any margin, and it carries the higher 5,693 power score against 4,312. That said, the DELTA 3 Max Plus is the better value story — cheaper to buy at $1,099 and cheaper to own at $0.13 per lifetime kWh against $2,399 and $0.15 — so if your actual routines top out around CPAP, a workday, or a tailgate, the smaller unit is the honest buy, not a compromise. Pay the extra $1,300 only if a scenario like Weekend Camping or a longer blackout is real for you.
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.
$2,399.00 list · direct from EcoFlow
or check the DELTA 3 Max Plus price$1,099.00 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): UPS, CPAP, Tailgating, Apartment Balcony.
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 Max Plus rates 4.3/5 (58th percentile of 25 Large-class units), and DELTA Pro 3 rates 4.1/5 (47th 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.
112.4 lbs Is a Two-Person Commitment
That's more than double the DELTA 3 Max Plus's 50.7 lbs — the line between a solo carry and a lift you plan for. Pick the DELTA Pro 3's spot once; a semi-permanent appliance is exactly what 112.4 lbs becomes. The DELTA 3 Max Plus, at less than half that, one person can still move on a whim.
Surge Power: Inverter Quality Indicator
Both units cap at the same 6,000W surge ceiling, so in absolute terms neither loses to the other on a hard startup spike. But the DELTA 3 Max Plus reaches that ceiling from a 3,000W continuous rating — a 2x cushion — while the DELTA Pro 3 reaches it from 4,000W, a 1.5x cushion. A bigger continuous number doesn't automatically mean a proportionally bigger inverter behind it.
Warranty Value Comparison
Both units carry the same 5-year warranty term, so length isn't the variable. Price is: that coverage costs $220 a year on the DELTA 3 Max Plus and $480 a year on the DELTA Pro 3, simply because the sticker price is higher. Identical protection, different price of admission.
Full record above — the Test Desk pick is the DELTA Pro 3.
Check DELTA Pro 3 price →or check the DELTA 3 Max 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
Both units have similar long-term ownership costs ($0.13/kWh vs $0.15/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
Growth path
DELTA 3 Max Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,048Wh.
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 3
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 4,096Wh.
Accepts up to 2,000W 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.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the DELTA Pro 3's higher solar ceiling (2,000W 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 Max Plus
Reviewers frame the DELTA 3 Max Plus as a genuine step up on its own platform, not just a spec bump — continuous output climbs to 3,000W with the same 6,000W surge ceiling, which coverage calls a significant jumpA1. It also runs quiet under typical loads: reviewers describe the fan barely rising above ambient room noise even while charging at full power, with the fan only spinning up briefly at shutdownA2.
Charging is fast enough that multiple reviewers called it out specifically, reaching a near-full charge well under the length of a feature filmA3. The expansion story reads as polished rather than an afterthought too — reviewers describe the Smart Extra Battery system as effortless in practice, scaling capacity well past the base unit's 2,048WhA4.
“Bumps output to 3,000W continuous with a 6,000W surge — a significant upgrade over the DELTA 3 Max's 2,400W and 4,800W surge.”
Sources
storagereview.com · androidguys.com · t3.com · trustedreviews.com
EcoFlow DELTA Pro 3
Coverage treats the DELTA Pro 3 as a flagship-class whole-home unit: 4,096Wh of LFP capacity, 4,000W continuous output, and dual-voltage 120V/240V support, expandable well beyond its base sizeB1. Reviewers rate the LiFePO4 cells for a realistic decade-plus of use, with a rugged ingress rating on the battery pack itselfB2.
Charging draws similar praise — reviewers highlight fast high-wattage input alongside a genuinely useful solar ceiling for a unit this sizeB3. At 112.4 lbs, reviewers are upfront that this is a two-person, set-it-and-leave-it unit, and still call it a gold-standard whole-home backup pickB4.
“4,096Wh LFP battery with 4,000W continuous AC output (6,000W with X-Boost) and dual-voltage 120V/240V, expandable to 48kWh.”
Sources
ecoflow.com · amazon.com · homedepot.com · thepowerpick.com · outboundpower.com · techradar.com · thesolarlab.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 Max Plus delivers more output and surge than the Max, plus a larger expansion ceiling, while staying quiet and fast-charging — a polished, higher-power take on the same platform. [DELTA 3 Max Plus · 3 entries]
- Huge 4,096Wh LFP capacity, 4,000W dual-voltage output, very fast charging, and big expandability are the standout praise; it's heavy at ~113 lbs. [DELTA Pro 3 · 2 entries]
- A1
“Bumps output to 3,000W continuous with a 6,000W surge — a significant upgrade over the DELTA 3 Max's 2,400W and 4,800W surge.”
storagereview.com / androidguys.com — DELTA 3 Max Plus review · 2026 · [positive]
- A2
“Stays genuinely quiet under typical loads, only spinning up its fans briefly during shutdown; even charging at full power the decibel meter barely registered above room noise at one meter.”
t3.com / trustedreviews.com — DELTA 3 Max Plus review · 2026 · [positive]
- A3
“Fast charging — reached 80% in about 50 minutes and full in around 70 minutes.”
t3.com — DELTA 3 Max Plus review · 2026 · [positive]
- A4
“Scalable — supports expandable capacity from 2kWh up to 10kWh via Smart Extra Batteries, with 5 charging methods; reviewers describe it as polished and effortless.”
storagereview.com / t3.com — DELTA 3 Max Plus review · 2026 · [positive]
- B1
“4,096Wh LFP battery with 4,000W continuous AC output (6,000W with X-Boost) and dual-voltage 120V/240V, expandable to 48kWh.”
ecoflow.com / amazon.com — DELTA Pro 3 · 2026 · [positive]
- B2
“LiFePO4 rated for 4,000+ cycles to 80% (10+ years), with an IP65 battery rating.”
homedepot.com / thepowerpick.com — DELTA Pro 3 review · 2026 · [positive]
- B3
“Multi-charge technology reaches 0-80% in about 50 minutes using up to 7,000W input, with a full charge in roughly 90 minutes; up to 2,600W solar.”
outboundpower.com / techradar.com — DELTA Pro 3 review · 2026 · [positive]
- B4
“Weighs about 113.5 lbs; reviewers call it a gold-standard whole-home backup unit for 2026.”
techradar.com / thesolarlab.com — DELTA Pro 3 review · 2026 · [positive]
Research compiled July 28, 2026.
Who Should Buy Which
Buy the DELTA 3 Max Plus if you…
- →You're covering CPAP, a laptop workday, or weekend tailgate loads — the DELTA 3 Max Plus clears all three with capacity to spare, at $1,300 less than the DELTA Pro 3.
- →You need to move the unit around — trunk to garage to campsite — and 50.7 lbs you can lift solo matters more to you than maximum headroom.
Buy the DELTA Pro 3 if you…
- →You're planning for an actual multi-night outage or a fridge-and-AC-class load: the DELTA Pro 3 clears Weekend Camping and the 8-Hour Blackout with real margin where the smaller unit runs out or cuts it close.
- →You want the higher continuous output — 4,000W against 3,000W — for tools or appliances that need it, and you're setting the unit down once, not carrying it around.
If neither fits
If your daily load is real van life — a mini-fridge running around the clock plus a laptop, lights, and a fan — neither unit alone covers the 4,685Wh that takes; both land over 100% of usable capacity even before nightfall. That's a case for the DELTA Pro 3 with at least one expansion battery, not a single bigger box, since both units share the same expandable EcoFlow platform.
The Bottom Line
The DELTA Pro 3 wins this because it's built for the scenarios that actually break the smaller unit — Weekend Camping needs 2,100Wh against a 2,048Wh pack, and the 8-Hour Blackout leaves the DELTA 3 Max Plus running at 94% of usable capacity with nothing in reserve. Pay the extra $1,300 for that headroom if those are your real routines.
If they're not — if this is CPAP, a workday, or a tailgate — the DELTA 3 Max Plus is cheaper to buy, cheaper to own per kWh, and less than half the weight at 50.7 lbs. Buy the capacity you'll actually use, not the one with the bigger number on the box.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA Pro 3 just a bigger DELTA 3 Max Plus?
Mostly, yes. Both run the same EcoFlow LiFePO4 platform, share a 6,000W surge ceiling, a 100W max USB-C port, and a 5-year warranty. The differences are capacity (4,096Wh against 2,048Wh), continuous output (4,000W against 3,000W), weight (112.4 lbs against 50.7), and price ($2,399 against $1,099).
Which one is cheaper to own long-term, not just to buy?
The DELTA 3 Max Plus, on both counts. It's $1,099 up front against $2,399, and it works out to $0.13 per lifetime kWh against $0.15 for the DELTA Pro 3 once you spread the price across a full 4,000-cycle life. The gap in the second number is small, though — you're not paying a premium for worse long-term economics with the Pro 3, you're paying for capacity and output.
Can the DELTA 3 Max Plus handle a weekend of camping?
Cutting it close to not at all. Two nights of lights, a fan, and a CPAP works out to 2,100Wh needed, and the DELTA 3 Max Plus's entire rated capacity is 2,048Wh — before you even lose anything to the inverter. The DELTA Pro 3 covers the same weekend using 60% of its usable capacity.
Does the bigger unit have a better inverter?
Not by the surge-to-continuous ratio, oddly. Both units cap out at the same 6,000W surge ceiling, but the DELTA 3 Max Plus's 3,000W continuous rating gives it a 2x cushion above that, while the DELTA Pro 3's 4,000W continuous rating narrows its cushion to 1.5x. In absolute terms it doesn't matter for what you can start — but it's a reminder that a bigger continuous number and a proportionally bigger inverter aren't the same thing.
Is the DELTA Pro 3 too heavy to move around?
At 112.4 lbs, plan on it being a two-person lift and a semi-permanent placement, not something you relocate often. The DELTA 3 Max Plus, at 50.7 lbs, is the one built to travel with you.
Where to buy
EcoFlow DELTA 3 Max Plus
$1,099.00
$1,099.00 list · direct from EcoFlow
EcoFlow DELTA Pro 3Pick
$2,399.00
$2,399.00 list · direct from EcoFlow
Prices may vary by retailer and are subject to change.