Head-to-head test
EcoFlow DELTA 3 Max vs EcoFlow DELTA Pro 3
The DELTA 3 Max can't finish a weekend of camping on one charge — it needs 121% of what it holds — while the DELTA Pro 3 does the same trip with 40% of its tank still full (it used just 60%); that headroom is the entire case for paying $1,550 more and carrying 61.7 extra pounds.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Max
4,337Power Score · Appliance Class
$849.00 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 3 Max costs $849. The DELTA Pro 3 costs $2,399 — $1,550 more, or 2.8 times the price (2,399 divided by 849). That gap doesn't decide anything by itself; what decides it is what the $1,550 actually buys.
It doesn't buy a cheaper unit to own, either. Run both through their lifetime numbers and the DELTA 3 Max is still the more efficient one: $0.10 per lifetime kWh against the DELTA Pro 3's $0.15 — 50% more per kWh delivered, on top of costing more to buy in the first place.
What it buys is a tank that doesn't run dry on the jobs these things get bought for. A weekend of camping needs about 2,100Wh; the DELTA 3 Max would need 121% of its usable capacity to cover that, which means it can't finish the trip on one charge. The DELTA Pro 3 covers it using 60% of its own tank. That's the real trade on this page — not price, but whether your heaviest use case actually clears 2,048Wh.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
That mismatch doesn't wash out over the unit's life — it shows up again in the lifetime numbers: $0.10 per lifetime kWh for the DELTA 3 Max against $0.15 for the DELTA Pro 3, 50% more per kWh actually delivered (0.15 divided by 0.10).
DELTA 3 Max price: $849; DELTA Pro 3 price: $2,399DELTA 3 Max capacity: 2,048Wh; DELTA Pro 3 capacity: 4,096Wh — exactly double
Why it mattersAnyone optimizing purely for cost per kWh over years of use should default to the DELTA 3 Max — the Pro 3's premium has to be earned somewhere other than lifetime economics.
That margin costs 61.7 lbs to haul around (112.4 lbs against 50.7) for the other days of the year you're not on a weekend trip.
Weekend Camping needs 2,100Wh; the DELTA 3 Max would need 121% of its usable capacity to cover itThe DELTA Pro 3 covers the same trip using 60% of its usable capacity
Why it mattersIf your actual peak trip is a weekend away from a wall outlet, the extra weight buys real capability; if it's shorter than that, you're carrying 61.7 lbs for a scenario you don't have.
continuous output
In absolute watts the Pro 3 still out-surges the 3 Max (6,000W against 4,800W), so a single appliance whose startup draw tops 4,800W only the Pro 3 can start — but for anything within reach of both, the DELTA 3 Max's inverter is the proportionally overbuilt one.
DELTA 3 Max: 4,800W surge on a 2,400W continuous rating — 4,800 divided by 2,400 is 2.0xDELTA Pro 3: 6,000W surge on a 4,000W continuous rating — 6,000 divided by 4,000 is 1.5x
Why it mattersDon't assume the pricier, bigger-capacity unit automatically has more surge margin relative to what it's rated to run continuously — check the ratio, not just the watt number on the box.
The Pro 3's only unmatched specs are scale: 4,000W continuous against 2,400W, and a 2,000W solar ceiling against 1,000W (both exactly double) — the premium has to be justified by that headroom alone, since neither the warranty nor the cycle life adds anything extra to the case.
Both units carry a 5-year warranty and are rated for 4,000 cyclesCost per warranty year: $170 for the DELTA 3 Max, $480 for the DELTA Pro 3
Why it mattersAnyone tempted to credit the Pro 3's price to 'a better warranty' should drop that argument — the coverage is identical, so the whole premium buys capacity and output, not durability.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The real gap between these two lives here — one genuine capacity failure (Weekend Camping), one tight margin (8-Hour Blackout), and three jobs both units already clear comfortably.
Weekend Camping is where this pair stops being close: the DELTA 3 Max needs 121% of its usable capacity for a 2,100Wh trip, meaning it doesn't finish — you're recharging mid-trip or cutting it short. The DELTA Pro 3 does the same weekend on 60% of its tank. An 8-hour blackout tells a smaller version of the same story: 94% for the DELTA 3 Max against 47% for the Pro 3, so the smaller unit clears it but with almost nothing left if the outage runs long.
Everywhere else, the gap stops mattering. CPAP Overnight is a flat tie — 18% and 9% of capacity, nowhere near either ceiling. Remote Workday and Tailgate Party go to the DELTA Pro 3 on paper, but the DELTA 3 Max clears both using half its tank or less, so that's spare headroom, not a job it can't do. Van Life Daily beats them both. Buy the Pro 3 for the weekend trip and the blackout, where the difference is real — not for the workday or the tailgate, where both already have room to spare.
What the Specs Don't Tell You
Selected because: Weight (warning, against the Pro 3), surgeRatio (advantage, favors the smaller unit proportionally), and warranty (info, same years/different cost) all fire and all cut differently.
Weight runs opposite the scenario wins: the DELTA Pro 3 is 61.7 lbs heavier (112.4 against 50.7) — the direct toll of the capacity that wins Weekend Camping and the blackout. Surge tells a smaller, stranger story: proportionally, the DELTA 3 Max's inverter has more headroom over its own rating (2.0x against the Pro 3's 1.5x), even though the Pro 3 still surges to a higher absolute number (6,000W against 4,800W).
Warranty and cycle life are identical on paper — 5 years, 4,000 cycles, both units — so the $310 gap in cost per warranty year ($480 against $170) buys nothing but capacity and output, not extra durability. Whatever premium you're paying for the Pro 3, it isn't buying a longer-lasting battery.
Lifetime Value
Selected because: DELTA 3 Max is cheaper both to buy and to own per kWh — the counterweight to the scenario story.
cost / lifetime kWh
The DELTA 3 Max is the cheaper unit twice over: $849 against the DELTA Pro 3's $2,399 up front, and $0.10 per lifetime kWh against $0.15 over the battery's life. That second number is what matters if you'll actually cycle either unit hard — 50% more per kWh delivered, on a unit that already cost 2.8 times as much to buy.
That advantage only pays off if you use the capacity, though. A buyer who never comes close to filling the DELTA 3 Max's tank captures all of its cost advantage and none of the Pro 3's headroom — exactly the trade for anyone whose peak job tops out at a workday or a tailgate, not a weekend trip.
Growth Path
Selected because: Both expand identically via EcoFlow batteries; the Pro 3's doubled solar ceiling compounds its scenario advantage rather than offsetting it.
solar input
Both expand the same way — EcoFlow's own batteries bolt on without replacing the base unit — so expandability by itself isn't the differentiator here. The DELTA Pro 3's solar ceiling is: 2,000W against the DELTA 3 Max's 1,000W, exactly double, which means a growing off-grid setup refills in half the time under the same sun.
That compounds the same advantage for the buyer already leaning toward the Pro 3 for its weekend-and-blackout headroom, rather than offsetting it. It isn't a reason to upgrade on its own — it's one more point in the same column.
Strengths & trade-offs
EcoFlow DELTA 3 Max
Strengths
- +Costs $1,550 less
- +Lighter by 61.7 lb
Trade-offs
- –Weaker inverter (-1,600W) limits appliance compatibility.
EcoFlow DELTA Pro 3
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$1,550) than the DELTA 3 Max.
- –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
A weekend of camping runs about 2,100Wh. The DELTA 3 Max would need 121% of what it holds to cover it — it runs dry before the trip's over. The DELTA Pro 3 does the same trip using 60% of its tank, finishing with 40% still in reserve.
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 draws roughly 1,645Wh. The DELTA 3 Max clears it, but just barely — 94% of its usable capacity, with only 6% left over if the power stays out a little longer. The DELTA Pro 3 spends 47% of its own tank on the same outage, with real margin to spare.
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 units treat an overnight CPAP as a rounding error — 18% of the DELTA 3 Max's capacity, 9% of the DELTA Pro 3's. Neither is close to its limit, so this one's a genuine tie; let price and weight break it instead.
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 remote workday needs about 910Wh. The DELTA 3 Max handles it comfortably at 52% of its tank; the DELTA Pro 3 barely notices it at 26%. Either gets the job done — the Pro 3 just does it with double the cushion.
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
A tailgate setup draws around 670Wh. The DELTA 3 Max covers it using 38% of its capacity; the DELTA Pro 3 uses 19%. Both finish with plenty left, so this one comes down to which unit you'd rather carry to the parking lot.
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 runs about 4,685Wh — more than either unit holds on its own. The DELTA 3 Max would need 269% of its capacity to cover it, the DELTA Pro 3 135%. Both fall short in a single charge; pair either with solar input or a second battery before counting on it for full-time off-grid living.
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 26, 2026
Verdict: the DELTA Pro 3, on Power Score margin
Take the DELTA Pro 3 if your heaviest job is a weekend away from the wall or a real multi-day outage — it's the only one of these two that finishes those jobs with margin. The DELTA 3 Max needs 121% of its usable capacity for a 2,100Wh weekend trip (it can't complete it on one charge) and is down to just 6% of headroom after an 8-hour, 1,645Wh blackout (94% used). The DELTA Pro 3 clears both at 60% and 47% respectively. That capability costs $1,550 more ($2,399 against $849) and 61.7 more lbs (112.4 against 50.7), and it isn't cheaper to own either — the DELTA 3 Max runs $0.10 per lifetime kWh against the Pro 3's $0.15. If your actual peak draw looks like a CPAP, a remote workday, or a tailgate — jobs the DELTA 3 Max clears using half its tank or less — buy the DELTA 3 Max and keep the $1,550.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 26, 2026. The links below open EcoFlow's current price.
$2,399.00 list · direct from EcoFlow
or check the DELTA 3 Max price$849.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 26, 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 rates 4.4/5 (63rd 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 vs 50.7 lbs: More Than Double
The DELTA Pro 3 weighs 112.4 lbs against the DELTA 3 Max's 50.7 — 61.7 lbs heavier, more than double. That's the direct cost of the extra capacity: a two-person lift out of a trunk instead of a one-person carry, every time you move it.
The Smaller Unit Has the Better Surge Ratio
The DELTA 3 Max surges to 4,800W on a 2,400W continuous rating — 2.0 times its rated output. The DELTA Pro 3 surges to 6,000W on 4,000W continuous — 1.5 times. In absolute watts the Pro 3 still surges higher, but proportionally, the smaller unit's inverter has more headroom over what it's rated to run all day.
Same 5 Years, Very Different Price Per Year
Both units carry a 5-year warranty and a 4,000-cycle rating — durability is identical. Priced per warranty year, that's $170 for the DELTA 3 Max and $480 for the DELTA Pro 3 — the coverage is the same length, so the gap is pure price, not extra protection.
Full record above — the Test Desk pick is the DELTA Pro 3.
Check DELTA Pro 3 price →or check the DELTA 3 Max 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 Max wins on both sticker price and long-term value. At $0.1/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Growth path
DELTA 3 Max
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
Reviewers call the DELTA 3 Max whisper-quiet under moderate load, with an app-based quiet mode and a custom charge-speed limit for anyone who wants to tune fan behavior furtherA1. That app control is one of the more consistently cited reasons people move into the EcoFlow ecosystem in the first placeA2.
Hands-on testing found capacity held steady between one-month and three-month checks, and the unit survived truck-bed transport, a roughly 105°F garage, and operation near freezing (about 34°F) without complaintA3. One review rated it 8.5/10 overall, citing fast recharge and LFP longevity as one of the better value propositions in the 2kWh classA4 — though some coverage blends the DELTA 3 Max with the DELTA 3 Max Plus variant, so ecosystem-wide claims like the app are on firmer ground than any single number pulled from a review of 'the line.'
“Whisper-quiet under moderate load — essentially silent at conversational distance; the app adds a low-power quiet mode and a custom charge-speed limit if fan noise bothers you. Fans rise under heavy load but stay quieter than most competitors in the 2kWh class.”
Sources
backuppowerhub.com · thesolarlab.com · androidguys.com
EcoFlow DELTA Pro 3
The DELTA Pro 3 packs 4,096Wh of LFP capacity with 4,000W continuous output (6,000W on X-Boost) and dual-voltage 120V/240V, expandable up to 48kWhB1. It's rated for 4,000-plus cycles to 80% — reviewers describe that as 10-plus years of use — with an IP65 battery housingB2.
Charging is genuinely fast for a unit this size: 0-80% in about 50 minutes on high-power input, a full charge in roughly 90 minutesB3. The line owners and reviewers return to is the weight — pegged at around 113.5 lbs, with reviewers calling it a gold-standard whole-home unit anywayB4 — which is the tradeoff for the capacity, not a knock against it.
“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
- Reviewers consistently praise practical quietness (with app-based quiet/charge-limit modes) and the EcoFlow app/ecosystem as differentiators. [DELTA 3 Max · 2 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
“Whisper-quiet under moderate load — essentially silent at conversational distance; the app adds a low-power quiet mode and a custom charge-speed limit if fan noise bothers you. Fans rise under heavy load but stay quieter than most competitors in the 2kWh class.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review; thesolarlab.com — DELTA 3 Max Review · 2026 · [positive]
- A2
“The EcoFlow app is one of the main reasons people migrate to the ecosystem: deep control including a custom charge-speed limit and quiet mode, well beyond the on-device interface.”
androidguys.com / thesolarlab.com — EcoFlow DELTA 3 Max line · 2026 · [positive]
- A3
“Capacity stayed consistent between 1-month and 3-month tests (within measurement error). The unit survived truck-bed transport, storage in a ~105°F garage, and operation near freezing (~34°F) without issue.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review (hands-on) · 2026 · [positive]
- A4
“Rated 8.5/10 overall — strong across nearly every metric in the 2kWh class, with fast recharge and LFP longevity called one of the best value propositions in the segment.”
backuppowerhub.com — EcoFlow DELTA 3 Max 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 26, 2026.
Who Should Buy Which
Buy the DELTA 3 Max if you…
- →Your heaviest job is an overnight CPAP, a remote workday, or a tailgate — the DELTA 3 Max clears all three using half its capacity or less, at $1,550 less and 61.7 fewer lbs.
- →You want the cheaper unit to own over years of use, too — $0.10 per lifetime kWh against the DELTA Pro 3's $0.15.
Buy the DELTA Pro 3 if you…
- →Your peak trip is a full weekend of camping — the DELTA 3 Max needs 121% of its tank for that load and can't finish it in one charge.
- →You're sizing for a real outage — the DELTA Pro 3 rides out an 8-hour blackout using less than half its capacity, where the DELTA 3 Max is down to 6% headroom on the same outage.
If neither fits
If your daily draw looks like full-time van life at around 4,685Wh, neither covers it in a single charge — the DELTA 3 Max would need 269% of its capacity and the DELTA Pro 3 135%. Look at a larger dual-battery or whole-home-class system instead of stretching either of these across a full day.
The Bottom Line
This comes down to one question: does your heaviest job clear 2,048Wh in a single charge? The DELTA 3 Max needs 121% of its tank for a weekend camping trip and finishes an 8-hour blackout with just 6% to spare — real ceilings, not theoretical ones. The DELTA Pro 3 clears both with room left over: 4,096Wh, 4,000W continuous, and a 2,000W solar ceiling for refilling faster in the field.
That headroom costs $1,550 more, 61.7 more lbs, and a lifetime cost that's 50% higher per kWh ($0.15 against $0.10) — real money for real capability, not a wash. If your actual peak load looks like a CPAP, a workday, or a tailgate — everything the DELTA 3 Max already clears using half its tank or less — keep the $1,550 and buy the smaller unit instead.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Which is cheaper, the EcoFlow DELTA 3 Max or the DELTA Pro 3?
The DELTA 3 Max, by $1,550 — $849 against the DELTA Pro 3's $2,399. It's also the cheaper unit to own long-term, at $0.10 per lifetime kWh against the Pro 3's $0.15.
Can the DELTA 3 Max handle a full weekend of camping?
Not on a single charge. A weekend camping load runs about 2,100Wh, and the DELTA 3 Max would need 121% of its usable capacity to cover it — it runs out before the trip's over. The DELTA Pro 3 covers the same trip using 60% of its capacity, with 40% left in reserve.
Is the DELTA Pro 3 worth 61.7 lbs more?
Only if you need the capacity it buys. At 112.4 lbs against the DELTA 3 Max's 50.7, it's more than double the weight for headroom that matters on a full weekend trip or an extended blackout. For a CPAP, a remote workday, or a tailgate — jobs the DELTA 3 Max clears using half its tank or less — you'd be carrying 61.7 extra lbs for margin you won't use.
Which one is better for an overnight CPAP?
Either — it's a tie. The DELTA 3 Max uses 18% of its capacity overnight, the DELTA Pro 3 uses 9%; neither is close to its limit. At that draw, the deciding factor is price and weight, not capacity, and both point at the DELTA 3 Max.
Do both expand if I need more capacity later?
Yes — both add EcoFlow's own expansion batteries without replacing the base unit. The DELTA Pro 3 has the stronger growth path on the solar side too, with a 2,000W input ceiling against the DELTA 3 Max's 1,000W, so a growing setup refills faster in the field.
Where to buy
EcoFlow DELTA 3 Max
$849.00
$849.00 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.