Head-to-head test
EcoFlow DELTA 3 Ultra vs Jackery HomePower 3600 Pro Max
The Jackery is the better unit on paper, but nearly everything its extra $500 buys is battery lifespan you will never spend, so it earns the premium only if you plan to grow it.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Ultra
4,712Power Score · Appliance Class
$1,399.00 · direct from EcoFlow
Last checked 6 days ago. Prices move — check before you buy.
Jackery
HomePower 3600 Pro Max
5,159Power Score · The AC & Fridge Zone
$2,099.00 · direct from Jackery
Last checked 6 days ago. Prices move — check before you buy.
Spec deltas
The DELTA 3 Ultra is $1,299 and the HomePower 3600 Pro Max is $1,799, and what that $500 buys is oddly specific: 512Wh more capacity (3,584Wh against 3,072Wh), 400W more inverter (4,000W against 3,600W), and 2,000 more charge cycles (6,000 against 4,000). One of those three will change how you live with the unit. It is not the cycles, and it probably is not the capacity.
Cycle life is where this matchup goes quietly absurd. The Jackery really is cheaper per unit of energy over its life, eight cents a lifetime kilowatt-hour against eleven, but you collect that discount by draining and refilling it every single day for 16.4 years. Use either one the way people actually use a battery this size, a few weekends and the occasional outage, and the cells are rated to outlast the house: 38.5 years for the Ultra, 57.7 for the Jackery. Both warranties expire at five.
So the premium comes down to the expansion port, and that is a genuine thing to want. The Jackery takes expansion batteries past its 3,584Wh; the Ultra is sealed at 3,072Wh and always will be. If you are building toward partial-home backup, that is worth the money and then some. If you want a finished box that arrives, gets plugged in, and waits, the Ultra is the same job for less.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
Measure the same two prices against the horizon you can actually enforce and the picture changes: five covered years costs $260 a year on the Ultra and $360 on the Jackery. On weekend duty they land at nine cents a day, identical to the penny, except one of them got there for less money up front.
HomePower 3600 Pro Max: 6,000 cycles across 3,584Wh, for 21,504 lifetime kWh at $0.08 eachDELTA 3 Ultra: 4,000 cycles across 3,072Wh, for 12,288 lifetime kWh at $0.11 eachCollecting the Jackery's full 21,504 kWh means a complete drain and refill every day for 16.4 yearsBoth units carry a 5-year warranty
Why it mattersIf the unit's job is to sit charged and wait for the grid to fail, cycle life is decoration and you should buy on price.
Capacity
And the scenarios never cash it. Blackout, CPAP night, remote workday, tailgate: the two units land in the same place on all four, both finishing with room left. The extra 512Wh does not move a single scenario from cannot to can. It changes the number on the display when you are done.
The price gap is $500 ($1,799 minus $1,299)The capacity gap is 512Wh (3,584Wh minus 3,072Wh)The Ultra's energy costs $0.42 per Wh; the Jackery's costs $0.50 per WhAn 8-hour blackout draws 1,645Wh: 63% of the Ultra's usable energy, 54% of the Jackery's
Why it mattersIf your load list already fits inside 3,072Wh, the capacity premium buys margin you will watch and never use.
That route is a project, not a purchase. On top of the batteries you would add, the automatic transfer that headlines the unit needs a sub-panel or Jackery's smart panel to do its jobB2, and the inverter still stops at 4,000W no matter how much battery hangs off itB1B4. You are not buying a bigger power station. You are buying the first component of a home system.
Van Life Daily needs 4,685Wh a day: 179% of the Ultra's usable energy and 154% of the Jackery'sThe Ultra is sealed at 3,072Wh with no expansion portThe Jackery accepts expansion batteries beyond its 3,584WhThe Jackery's transfer switch only behaves like one with a dedicated sub-panel or Jackery's own smart panel behind itB2
Why it mattersVan dwellers and partial-home-backup builders should start with the Jackery and budget for the rest; everyone else is paying admission to a project they will never begin.
The hardware moment both units are selling is already a tie at 10ms, and the honest press read on that class of claim is that nobody perceives the handoff anywayB6. What is not a tie is the hour after the handoff, when you want state of charge and remaining runtime on a phone screen in a dark kitchen. EcoFlow also has roughly 31,000 people in its subreddit against Jackery's 2,000, which matters at the moment the app will not cooperate.
The Jackery's headline feature is automatic transfer to backup powerJackery's app scores 2.3 to 3.3 out of 5 on iOS and Android, split across two similarly named apps, with a mandatory login even offlineEcoFlow's app scores 4.6 on iOS across roughly 8,400 ratings and 4.2 on Android across roughly 17,000Both units spec a 10ms switchover
Why it mattersIf the plan is set-and-forget backup, weigh the software you will be standing in the dark with over the millisecond spec you will never notice.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The Jackery costs $500 more and is cheaper per lifetime kilowatt-hour. Both are true, and only one of them happens this year.
cost / lifetime kWh
A battery rated to deliver 21,504 kilowatt-hours is a strange thing to sell someone who wants to keep a fridge cold twice a year. That is the Jackery's lifetime figure against the Ultra's 12,288, and it is what drags its cost per lifetime kilowatt-hour down to eight cents from eleven. The math is sound. The assumption underneath it is that you will still be there at the end.
Run the same money over the five years both brands will actually stand behind and it reads differently: $260 a year for the Ultra, $360 for the Jackery. Cheaper to own is a claim with a time horizon attached, and this horizon is longer than most mortgages.
Your Life, Your Pick
Selected because: Four of the six scenarios end in a dead heat, one goes to the Jackery, and one defeats both. That spread is the honest answer to what 512Wh buys.
The tailgate wants 670Wh. The CPAP wants 320. A full remote workday, laptop and monitors and all, wants 910. Against units holding 3,072Wh and 3,584Wh those are not tests, they are rounding errors, and both machines walk through every one of them under 40% of usable energy.
The two that separate them sit at the ends. A 2,100Wh camping weekend leaves the Jackery with more in reserve, 69% spent against 80%, which is the difference between driving home relaxed and driving home doing arithmetic. Van life at 4,685Wh a day defeats both, and that is the more useful finding: if that is your number, neither of these is a one-box answer, and the question becomes which one you can bolt more batteries onto.
Growth Path
Selected because: The Jackery expands past 3,584Wh and the Ultra is sealed at 3,072Wh, the one gap no amount of money closes later.
solar input
Sealed at 3,072Wh is only a flaw when the thing you would expand into is worth having, and here it is. The Jackery takes expansion batteries past 3,584Wh, which is the difference between owning a power station and owning the first module of a home system. The Ultra has no port and no add-on battery; its upgrade path is a second unit.
Price that port honestly, though. Using it means more batteries, plus a sub-panel or Jackery's own smart panel to make the transfer switch behaveB2, plus an inverter that still stops at 4,000W however much capacity is behind itB1. That is a plan, and plans are fine. What you should not do is pay for one as insurance against a future you have not actually decided on.
Brand Trust
Selected because: Two brands with opposite strengths: EcoFlow's app and 31,000-member community against Jackery's shelf space at Costco, Home Depot and Best Buy.
EcoFlow's advantage is the boring kind that shows up at 11pm during an outage: an app that scores 4.6 on iOS and 4.2 on Android, and a subreddit with roughly 31,000 people in it. Jackery's has about 2,000, and its app is the weakest in the category at 2.3 to 3.3 out of 5, split across two confusingly similar apps that want you logged in even when you are offline.
Jackery's counterweight is real: it sits on shelves at Costco, Home Depot and Best Buy, which means a return counter instead of a support ticket. Neither support operation is a selling point. EcoFlow's swings between prepaid-label replacements and long waits with refurbished units, and it offers no parts or service once the warranty lapses; Jackery's demands strict receipts for warranty claims. Buying either through a retailer with a generous return window is the cheapest insurance on this page.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra
Strengths
- +Costs $700 less
- +Lighter by 1.8 lb
Trade-offs
- –Sealed capacity — the HomePower 3600 Pro Max can add batteries to grow past 3,072Wh; this one can't.
- –Shorter-lived battery — rated for 4,000 charge cycles vs the HomePower 3600 Pro Max's 6,000, so it wears out sooner.
Jackery HomePower 3600 Pro Max
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$700) than the DELTA 3 Ultra.
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
HomePower 3600 Pro Max
The Jackery takes this one on reserves. Same 2,100Wh weekend, and it finishes having spent 69% of its usable energy against the Ultra's 80%. Both of you make it to Sunday. Only one of you gets there without checking the display on Saturday night.
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
An eight-hour outage asks for 1,645Wh, which is 63% of the Ultra's usable energy and 54% of the Jackery's. Both ride it out with the fridge, the router and something to do, neither one straining. When two units pass a test this cleanly, the tiebreak is the money you did not spend.
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 wants 320Wh overnight: 12% of the Ultra's usable energy, 11% of the Jackery's, and both units idle at the same 30 dBA eighteen inches from your head. This is a dead heat, and quietly a hint. If the CPAP is the whole job, you are shopping two classes above it.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Either unit
Both power your workstation all day without strain, and their USB-C output is a wash — pick on weight, ports, or price.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, weight is: at 72.1 lbs the DELTA 3 Ultra is the one you'll be glad you brought. Fan noise under load is worth a listen too — it's audible in the lulls between songs.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither, and it is not close. A full van day runs 4,685Wh, which is 179% of the Ultra's usable energy and 154% of the Jackery's, so both are flat before you are. What matters is what happens next: the Jackery accepts expansion batteries, and the Ultra is sealed at 3,072Wh. If van life is the plan, buy the one that can grow, or buy a bigger class outright.
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 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: HomePower 3600 Pro Max runs 14.9h vs 12.7h.
$2,099 list · direct from Jackery
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 0–203.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–40.6hHigh-Draw Appliances
These reveal the real limitsscale 0–3h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
August 2, 2026
Verdict: the EcoFlow DELTA 3 Ultra
Take the DELTA 3 Ultra at $1,299 unless you already know you are expanding. The HomePower 3600 Pro Max at $1,799 is the stronger machine on paper: 512Wh more capacity, 400W more inverter, 2,000 more charge cycles. Priced purely as capacity, that gap costs about 98 cents for every extra watt-hour ($500 spread over 512Wh), more than double the 42 cents a watt-hour the Ultra charges for the 3,072Wh you are already buying. The cycle advantage is real and almost entirely theoretical, since both warranties run out at five years and neither battery is close to tired by then. What survives the arithmetic is the expansion port, which the Ultra does not have. If your load list is heading toward partial-home backup, pay up. If this is a blackout box and a camping battery, the Ultra does those jobs completely and leaves money on the table for panels.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 2, 2026. The links below open EcoFlow's and Jackery's current prices.
$1,399.00 · direct from EcoFlow
Last checked 6 days ago. Prices move — check before you buy.
or check the HomePower 3600 Pro Max price$2,099.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated August 2, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
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 4.7/5 (83rd percentile of 25 Large-class units), and HomePower 3600 Pro Max rates 4.4/5 (67th percentile of 16 Home Backup-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Weight Reality Check
72.1 lb and 73.85 lb. Under two pounds apart, which makes weight a shared warning rather than a tiebreaker. Both are bent-knees, two-hands lifts, both want a second person at the tailgate, and neither is going down basement stairs on a whim. Decide where it lives before it arrives, because you will want to move it exactly once.
DELTA 3 Ultra: Fixed Capacity
What you buy is the ceiling. The Ultra is sealed at 3,072Wh with no expansion port, so if your loads outgrow it the upgrade is a second power station, not a second battery. For a backup box that never bites. But the HomePower 3600 Pro Max does take expansion batteries past 3,584Wh, and that is the single strongest argument for its higher price. If you cannot rule out needing more later, this is the one row on the page that should make you pause before saving money.
Warranty Value Comparison
Five years on both, so the coverage is a wash and the price is not: spread over the warranty term, the Ultra costs $260 a year and the Jackery $360. That is the horizon you can actually enforce. Everything past year five is a spec-sheet promise you would be arguing about with a support queue.
Battery Lifespan in Real Years
4,000 cycles against 6,000 sounds decisive until you put it on a calendar. On weekend use that is 38.5 years for the Ultra and 57.7 for the Jackery, and the second number is not a feature so much as a rounding error on a human life. Cycle life only turns into money under daily duty, where it is 11 years against 16.4. If you are not running one flat every day, this row should not move your decision.
Full record above — the Test Desk pick is the DELTA 3 Ultra.
Check DELTA 3 Ultra price →or check the HomePower 3600 Pro 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 Ultra is cheaper to buy, but the HomePower 3600 Pro Max is cheaper to own. At $0.1/kWh over its lifetime vs $0.11/kWh, the HomePower 3600 Pro Max's higher cycle life and capacity make each dollar go further over the years.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
The deepest ecosystem in portable power, 12 to 15 models spanning DELTA Pro, DELTA 3 and RIVER 3 plus panels and smart home panels, and the fastest charging technology in the category.
Worth knowing
Two things to weigh: the October 2025 DELTA Max 2000 recall for overheating risk, and a policy of no parts or service once the warranty is up. Buying through Costco or Amazon adds a return window that a support queue cannot take away.
Jackery
Ecosystem
12-15+ models across Explorer (portable) and HomePower (home backup) series, plus SolarSaga panel ecosystem and innovative form factors
Support
US-based support but widely criticized. Reddit reports describe slow/dismissive responses, scripted AI agents, strict receipt requirements for warranty claims, and refurbished replacements for clearly defective units. Strongly recommended: buy from Costco or Amazon for return protection.
Community
Smallest community of the major brands — Reddit r/Jackery has ~2,000 members. YouTube presence is solid due to brand recognition.
App experience
Rated 2.3-3.3/5 iOS and Android — the weakest app experience of the major brands. Multiple confusing apps (Jackery app vs Jackery Home) and mandatory login even offline.
Unique strength
The widest retail distribution in the category, Costco and Home Depot and Best Buy and Amazon, which means a physical return counter and the highest brand recognition on the shelf.
Worth knowing
The app is the weak link: 2.3 to 3.3 out of 5, two similarly named apps to keep straight, and a login required even offline. Warranty claims come with strict receipt requirements, so keep the paperwork somewhere you will find it in four years.
Analyst note
EcoFlow wins the parts of a brand you touch weekly: the app, the community, the model range. Jackery wins the part you touch once, at a return counter in a store you can drive to. For a unit whose selling point is running your house when the grid quits, weigh the software heavier than usual, because you will be reading it in the dark.
Growth path
DELTA 3 Ultra
FIXED CAPACITYFixed at 3,072Wh — a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 800W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
HomePower 3600 Pro Max
EXPANDABLESupports Jackery expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,584Wh.
Accepts up to 1,200W of solar. Enough for a serious multi-panel array.
Limited ports. You'll likely need a power strip or splitter.
Expansion batteries are Jackery-specific. You're investing in the Jackery ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The DELTA 3 Ultra is sealed at 3,072Wh, which is fine if that covers you. The HomePower 3600 Pro Max starts at 3,584Wh and can grow beyond it with Jackery expansion batteries — real headroom the DELTA 3 Ultra doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra
Start with a caveat, because it sets how much weight any of this carries: the hands-on record for this unit is thin, and most of what exists comes from testers working with the Ultra Plus, which shares this machine's chassis, inverter and cellsA1A9. What transfers cleanly is quiet. Reviewers describe the fans as staying out of the way even with the inverter pushed hardA1A2, and the build draws repeated praise, from the outer casing to the rear input-port covers that slide into their own slotsA9A15.
The UPS behaviour is the most consistently reported thing about this machine and the most relevant to a blackout buyer: testers pulled the wall power and saw no dip and no shutdown, with one comparing the handoff to a rack APCA4A5A6. Three smaller notes worth having. One reviewer measured a little over 4.5 hours at 300 to 600W on a single AC output and finished an eight-hour remote workday with 40% left, running a laptop, a desktop workstation and monitorsA7A8. One found the display hard to read in direct sun without cupping their hands around itA11. And one noticed the unit drops its 30A port first when you overload itA3.
“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
Jackery HomePower 3600 Pro Max
There is no long-term ownership record for the HomePower 3600 Pro Max. It launched this year, and the field signal available is launch-window video commentary and press hands-onsB5B6. Treat all of it as early rather than settled.
The recurring question is whether the automatic transfer switch is what the marketing implies. Commenters and a press reviewer keep arriving at the same doubt: a 4,000W inverter is a low ceiling for a house, and the 10ms switchover claim is impressive in a way testers say they cannot actually perceiveB1B4B6. The practical catch is duller and more expensive, which is that the transfer switch only behaves like one with a dedicated sub-panel or Jackery's own smart panel behind it, and the solar input uses a proprietary connector instead of the XT60 the rest of the industry settled onB2B3. Reaction to the price is mixed even among people who like the conceptB5.
“Regarding your dislike of inverter fail to stay on if > 4000W passthrough is terminated, it's understandable. It's internal inverter can only handle 4000W 240V.”
Sources
powerstationlab.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]
- Commenters and a press reviewer repeatedly question whether the marketed automatic transfer switch delivers true whole-home UPS coverage, given the 4,000W continuous ceiling and a gap between switchover-speed marketing claims and what testers actually notice in practice. [HomePower 3600 Pro Max · 3 entries]
- Getting the full ATS benefit requires extra infrastructure (a dedicated sub-panel or Jackery's smart panel), and the solar input uses a proprietary connector rather than the industry-common XT60. [HomePower 3600 Pro Max · 2 entries]
- Reactions to price and capacity are mixed: cheaper than the closest whole-home competitor but with roughly half the base capacity, and viewers flag the price point as a barrier despite liking the concept. [HomePower 3600 Pro Max · 2 entries]
- A1
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A2
“Even when you're pushing the inverter to its maximum output, the fans never become annoying or distracting.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A3
“One weird thing we noticed was the fact that the unit always seems to shut down the 30A port first when you overload the unit.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [mixed]
- A4
“Many power stations limit you to the input wattage when outputting power, but this EcoFlow power station does not.”
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]
- A7
“Using Maxon's Cinebench 2026 GPU benchmark, I was pulling between 300W and 600W on one of the AC outputs... the EcoFlow Delta 3 Ultra Plus would last a little over 4.5 hours.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A8
“I was able to work remotely for an eight-hour day with 40% power left, which included running my laptop, desktop workstation and monitors.”
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]
- A11
“But, while facing the sun, I had to employ the classic "cup hands cover" maneuver to get a clear look at the screen status.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [negative]
- 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
“Regarding your dislike of inverter fail to stay on if > 4000W passthrough is terminated, it's understandable. It's internal inverter can only handle 4000W 240V.”
YouTube — The Solar Lab, "Jackery HomePower 3600 Pro Max - Don't Fall For This!" (viewer comment) · 2026-06 · [mixed]
- B2
“Most homeowners use a generator input with a MANUAL interlock switch...you still have to manually flip the interlock to get power back into the house. To make the ATS work as intended, you need a dedicated sub-panel or Jackery's smart panel.”
YouTube — The Solar Lab, "Jackery HomePower 3600 Pro Max - Don't Fall For This!" (viewer comment) · 2026-06 · [negative]
- B3
“Why doesn't Jackery use the common XT60 connector when hooking up solar? Seems proprietary.”
YouTube — The Solar Lab, "Jackery HomePower 3600 Pro Max - Don't Fall For This!" (viewer comment) · 2026-06 · [negative]
- B4
“I watched all the hype videos last week and they barely touched on the functionality of the bypass power from the wall. You answered my question exactly...how is it UPS for an entire house with a 4K inverter.”
YouTube — Outdoor Prepper video comment thread, cross-referencing The Solar Lab's "Don't Fall For This!" review · 2026-06 · [mixed]
- B5
“Really enjoy your videos! Very well thought out. This looks like a great system but definitely not for everyone due to the price point.”
YouTube — Outdoor Prepper, "The Power Went Out... Everything Stayed On - Jackery HomePower 3600 Pro Max" (viewer comment) · 2026-06 · [mixed]
- B6
“Jackery says it can automatically flip on backup power in just 10 milliseconds...impressive, but perhaps practically meaningless, considering I never noticed when the Solix E10 switched to backup power in my testing.”
Gizmodo — "Jackery's New HomePower Backup Batteries Could Be a Cheap Way to Get (Partially) Off the Grid" · 2026 · [mixed]
Research compiled August 2, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra if you…
- →You want a blackout box. It lives in the garage, it comes out a few times a year, and an eight-hour outage spends 63% of its usable energy. $1,299 covers that job completely.
- →You are charging from the sun. 800W of solar input refills 3,072Wh in just under four hours of strong light (3,072 divided by 800), which is one good afternoon rather than one good day.
- →You want the better software. EcoFlow's app sits at 4.6 on iOS and 4.2 on Android, and there are roughly 31,000 people in its subreddit for the questions the manual does not answer.
- →You would rather put the difference into panels than into cycles 4,001 through 6,000.
Buy the HomePower 3600 Pro Max if you…
- →You are building toward partial-home backup. Expansion batteries past 3,584Wh plus a sub-panel is a system; the Ultra is a box. Start here and budget for the rest of it.
- →You genuinely cycle daily, off-grid or shuffling solar into every evening. At that duty the 6,000-cycle bank is real money, and 16.4 years of daily use against 11 is what the premium actually bought.
- →Your loads sit near the ceiling. 4,000W continuous and 8,000W of surge against the Ultra's 3,600W and 7,200W is the margin you want if the list includes a well pump or a second compressor.
If neither fits
If your day runs 4,685Wh, like the van-life profile, both of these are undersized before you leave the driveway. Shop stackable home batteries, or plan on a base unit plus expansion batteries from day one and price the whole thing at once. And if the entire job is a CPAP overnight at 320Wh, you are shopping two classes too high: that is 12% of the Ultra's usable energy, and a unit you can carry in one hand does it for a fraction of either price and without asking you to lift 72.1 lb.
The Bottom Line
Buy the DELTA 3 Ultra. It handles the blackout, the campsite, the workday and the tailgate with the same room to spare as the Jackery, it refills from 800W of sun in an afternoon, and it does all of it for $1,299. The Jackery's headline advantage is a battery good for 2,000 more cycles than the Ultra's, on a schedule where the Ultra's cells already outlast the house. Neither of you is collecting on that.
The one honest reason to pay more is the port. The Jackery grows past 3,584Wh and the Ultra never will, so if you already know you are heading toward partial-home backup, start with the Jackery and plan the sub-panel. If you are not sure, you are not. Take the Ultra and put the difference into panels.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Jackery HomePower 3600 Pro Max worth $500 more than the EcoFlow DELTA 3 Ultra?
Only if you are going to expand it or cycle it daily. The extra money buys 512Wh, 400W more inverter, and 2,000 more charge cycles, and the cycles are the biggest number on that list and the least useful, since on weekend duty both units' cells are rated past 38 years. If you are building toward partial-home backup, the expansion port justifies the premium by itself. If it is a backup box that waits in a garage, take the Ultra at $1,299.
Which one is better for whole-home backup?
The Jackery, but read the asterisk. It is the one with an automatic transfer switch and an expansion path, and it only behaves like a whole-home solution with a dedicated sub-panel or Jackery's own smart panel behind it. The inverter also stops at 4,000W, a ceiling several commenters flagged for house-sized loads. Budget for the electrician, not just the battery.
Can either of these run a van full time?
No, not on their own. A full van-life day is about 4,685Wh, which is 179% of the DELTA 3 Ultra's usable energy and 154% of the HomePower 3600 Pro Max's. The Jackery is the only one of the two you can grow into the job with expansion batteries. The Ultra is sealed at 3,072Wh, so its version of expansion is a second power station.
How long will each battery actually last?
Longer than you will own either one. The Ultra is rated for 4,000 cycles and the Jackery for 6,000, which on weekend use works out to 38.5 years and 57.7 years respectively. Cycle life only becomes a real difference under daily duty, where it is 11 years against 16.4. Both warranties run five years, which is the number you can actually hold someone to.
Is the DELTA 3 Ultra's lack of an expansion port a dealbreaker?
Only if you know your loads are growing. 3,072Wh covers every common scenario except full-time van life, and it handles an eight-hour blackout at 63% of usable energy with the fridge and the router running. But it is a hard ceiling: no port, no add-on battery, and the upgrade path is buying a second unit. If you cannot say confidently that 3,072Wh is enough for good, that is the one real argument for paying more.
Where to buy
EcoFlow DELTA 3 UltraPick
$1,399.00
$1,399.00 · direct from EcoFlow
Last checked 6 days ago. Prices move — check before you buy.
Jackery HomePower 3600 Pro Max
$2,099.00
$2,099.00 · direct from Jackery
Last checked 6 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.