Head-to-head test
EcoFlow DELTA 2 Max vs Jackery Explorer 1500 Ultra
Both packs hand over the same total energy before they die, so the only live question is whether twelve pounds off your back is worth $150 more for 512Wh less on every single charge.
Full profiles: EcoFlow DELTA 2 Max → · Jackery Explorer 1500 Ultra →
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
$1,049.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
$1,199.00 · direct from Jackery
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The DELTA 2 Max is the cheaper unit and the bigger one: $1,049 against $1,199, 2,048Wh against 1,536Wh. Pages like this usually turn on a trade-off. This one mostly doesn't.
Measured as day-one energy per dollar, that works out to about 46 cents a watt-hour on the EcoFlow ($1,049 divided by 2,048Wh) against about 65 cents on the Jackery ($1,199 divided by 1,536Wh). Nineteen cents a watt-hour is not a rounding error on a battery this size. The Explorer 1500 Ultra's price is paying for what surrounds the cells, not how many of them there areB1B3.
What that money buys is real. It buys 38.6 lb instead of 50.7 lb, and an IP65 seal rated against dust and rainB1. Its 4,000-cycle battery looks like the third reason to pay up. It isn't one, and the arithmetic for why is the first thing below.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
Once lifetime output ties, cost-to-own is purchase price and nothing else, which is why the two come out at 15 cents and 16 cents per lifetime kWh. So paying the premium for the durability spec means paying more for a battery that gives you less every day you actually use it, in exchange for a total that was already equal.
DELTA 2 Max: 2,048Wh, rated 3,000 cyclesExplorer 1500 Ultra: 1,536Wh, rated 4,000 cycles$1,049 against $1,199 at purchase
Why it mattersIf you were leaning Jackery because 4,000 beats 3,000, do the multiplication before you buy. That number is already spent.
solar input
Then stretch it to day two. The EcoFlow accepts 1,000W of solar against the Jackery's 800W, so the unit that lasted longer is also the one back to full sooner. Across a multi-day outage the gap compounds each morning instead of resetting.
The eight-hour blackout profile draws 1,645WhUsable energy after the 15% inverter derate: 1,741Wh against 1,306WhSolar input ceiling: 1,000W against 800W
Why it mattersIf backup is why you are shopping, stop here and buy the EcoFlow.
continuous output
So ignore the inverter row, which is where these comparisons usually get decided. What separates these two is the tank, not the pump: the difference shows up as how long something runs, never as whether it switches on at all.
DELTA 2 Max: 2,400W continuous, 4,800W surgeExplorer 1500 Ultra: 1,800W continuous, 3,600W surgeBoth units clear the peak draw in all six modelled scenarios
Why it mattersDon't pay for the bigger inverter. Do notice which battery it came bolted to.
That speed has an audible cost. Fast charging is exactly when the EcoFlow's fans are loudest, and the Quiet Charging mode that fixes it trades the speed straight backA1. It is an annoyance rather than a verdict, but it is a real one.
Reviewers time the DELTA 2 Max at 0-80% in about 50 minutes and full in roughly 80A2The Explorer 1500 Ultra is rated at a 1.5-hour AC rechargeB3Reviewers put the EcoFlow's fans around 52 dB under heavy load or while chargingA1
Why it mattersIf the unit refills in the room where you sleep or take calls, plan to charge it somewhere else.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: 1,741Wh of usable energy against 1,306Wh once inverter losses come off, which is the number that runs your fridge.
continuous output
Take the inverter losses off the top and the DELTA 2 Max has 1,741Wh to spend against the Explorer 1500 Ultra's 1,306Wh. That is a third more (1,741 divided by 1,306), and no charging trick or efficiency setting on the Jackery closes it.
A third sounds abstract until you convert it into hours, which is the only unit anyone actually buys. Same fridge, same router, same string of lights: the EcoFlow keeps them alive a third longer before anything goes quiet. And when it does run out, you plug it into a wall or a panel. You never add to it.
Lifetime Value
Selected because: Capacity times cycles lands on the same total for both, so the $1,049 against $1,199 sticker is the entire cost-to-own argument.
cost / lifetime kWh
Two batteries, one lifetime total. The cycle ratings and the capacities are inverted in precisely the proportion that cancels them out, which is the kind of coincidence that makes a spec sheet look like it is arguing with itself.
With durability settled as a draw, the whole cost-to-own case lands on the sticker: 15 cents per lifetime kWh against 16. Pennies on paper. But those pennies buy a smaller battery on every charge for as long as you own it, and that part is not pennies.
Portability & Form Factor
Selected because: 50.7 lb against 38.6 lb is the Jackery's clearest win and the best reason to pay the extra $150.
weight
50.7 lb against 38.6 lb. Both are two-hand, bent-knees lifts and neither is going up a ladder, but 12.1 lb is the difference between the unit that gets loaded into the car on a Friday and the unit that stays in the garage because you looked at it and decided not to.
The Jackery's other physical advantage is the IP65 seal: dust-tight, and rated against heavy rain and low-pressure water jetsB1. If this battery spends its life outdoors, in a truck bed or under a tarp, that is the one argument on this page that extra capacity cannot answer and $150 cannot buy back.
What the Specs Don't Tell You
Selected because: Two cards fire on this pair, and one of them quietly cancels the Jackery's best-looking spec.
rated cycles
Both cards here are about the same reading error: taking a spec at face value without the number it is attached to. Four thousand cycles sounds better than three thousand until you ask four thousand cycles of what. Sealed sounds worse than expandable until you ask how high the sealed ceiling is.
Run both questions and the first spec is a wash while the second one is real, which is the exact opposite of how they read side by side on a comparison table. That inversion is the reason these cards exist.
Strengths & trade-offs
EcoFlow DELTA 2 Max
Strengths
- +Costs $150 less
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Significantly heavier (+12.1 lbs), making it harder to move.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Explorer 1500 Ultra's 4,000, so it wears out sooner.
Jackery Explorer 1500 Ultra
Strengths
- +Lighter by 12.1 lb
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Weaker inverter (-600W) limits appliance compatibility.
- –Sealed capacity — the DELTA 2 Max can add batteries to grow past 1,536Wh; this one can't.
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
Neither unit
Neither unit gets you through this on one charge. The DELTA 2 Max comes up 359Wh short of the 2,100Wh weekend and the Explorer 1500 Ultra 794Wh short, so the EcoFlow needs less than half the top-up the Jackery does. Plan a midday session with panels either way, or trim the load.
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 2 Max
The DELTA 2 Max takes this one, and for most people on this page it is the scenario that matters. It covers the full load with something left in reserve. The Explorer 1500 Ultra runs dry with the outage still going, and a gap that size is not something you switch off a few LED bulbs to close.
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 are barely awake for this. A CPAP night is 320Wh, a fifth of the EcoFlow's usable energy and a quarter of the Jackery's, so the question is not whether they cope but how many nights you get before you need a wall: five against four. Neither is working hard enough for the fans to be part of the decision.
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 2 Max
Both finish the day. Only one finishes it with about half the battery still there, because a 910Wh workday uses roughly half of the DELTA 2 Max's usable energy against about seventy percent of the Explorer 1500 Ultra's. That is the difference between charging tonight and charging when you get around to it.
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 2 Max
Both handle game day; the DELTA 2 Max keeps more in reserve (38% used vs 51%). Tailgating is a light load, though, so the number you'll feel is weight: 38.6 lbs for the Explorer 1500 Ultra against 50.7 lbs for the DELTA 2 Max, from the trunk to the setup spot.
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
Out of range for both, and not narrowly. A 4,685Wh day is close to three full charges of the larger unit, so you would be tethered to panels all day and still finishing behind. Neither of these is a bad product here. They are the wrong size.
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: DELTA 2 Max runs 8.5h vs 6.4h.
$1,049 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 0–116.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–23.2hHigh-Draw Appliances
These reveal the real limitsscale 0–1.7h¹ 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 9, 2026
Verdict: the DELTA 2 Max
Take the DELTA 2 Max. At $1,049 it costs $150 less than the $1,199 Explorer 1500 Ultra and holds 2,048Wh against 1,536Wh, so you get the bigger battery for the smaller number. The Jackery earns its price in exactly two physical places: it weighs 38.6 lb against 50.7 lb, and it carries a documented IP65 dust and water ratingB1. If your unit lives in a truck bed, on a job site, or gets loaded into a car most weekends, those two things are worth paying for and no amount of extra capacity substitutes. If it lives in a closet and comes out when the power goes, buy the bigger, cheaper one.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 9, 2026. The links below open EcoFlow's and Jackery's current prices.
$1,049.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the Explorer 1500 Ultra price$1,199.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated August 9, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): 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 2 Max rates 3.8/5 (28th percentile of 26 Large-class units), and Explorer 1500 Ultra rates 3.5/5 (12th percentile of 27 Everyday-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.
The sealed ceiling sits below the other unit's floor
Being sealed is not a fault on its own. Plenty of excellent batteries are one fixed box, and a ceiling only counts against you if it is too low. This one is: the Explorer 1500 Ultra tops out at 1,536Wh, which is 512Wh under where the DELTA 2 Max starts, before any expansion battery enters the conversation. The honest flip side, against our own pick: those expansion batteries cost money we are not quoting you here. Buy the DELTA 2 Max for the 2,048Wh it has on day one, not for a future you have not priced.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The Explorer 1500 Ultra's figure is a maximum rather than a guarantee — it depends on registering the unit with Jackery, which is what extends the base term to the full period.
4,000 cycles and 3,000 cycles, same energy in the end
Cycle ratings get compared as though the packs behind them were the same size. These two are not, and the ratings cancel out to an identical lifetime total. Where the difference does show up is calendar time: drained every single day, the Explorer 1500 Ultra's rating covers about 11 years against the DELTA 2 Max's 8.2. That is a genuine point for the Jackery if you cycle a battery nightly. It is not a point about how much power you get.
Full record above — the Test Desk pick is the DELTA 2 Max.
Check DELTA 2 Max price →or check the Explorer 1500 Ultra 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 ($0.17/kWh vs $0.2/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off. One caution on the lifespan row: the Explorer 1500 Ultra takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit — the DELTA 2 Max still delivers more over its shorter horizon (6,144 vs 6,144 kWh). Years measure wear, not usefulness.
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
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
One thing worth scoping before it scares you off: the subscription paywall EcoFlow tested for advanced app features in early 2025 was paused after customer backlash. What remains live is support that runs hot and cold, plus no parts or service once the five-year warranty ends, which is a real argument for buying through a retailer with its own returns desk.
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
Highest brand recognition and widest retail distribution (Costco, Home Depot, Best Buy, Amazon). The "Toyota" of power stations — dependable, proven, wide availability. Innovative form factors like the Solar Gazebo and Solar Mars Bot.
Worth knowing
The NMC-chemistry warning that trails Jackery's older models does not apply here: the Explorer 1500 Ultra is LFP with a 4,000-cycle rating and a five-year warranty. The live issues are the app, the weakest of the major brands at 2.3 to 3.3 stars and insistent on a login even when you are offline, and a warranty process that leans on you having kept the receipt. Buy it somewhere with a return counter.
Analyst note
EcoFlow brings the deeper ecosystem, the better-rated app, and a community roughly fifteen times the size of Jackery's, 31,000 members against 2,000, which matters more than it sounds at 11 p.m. when something will not switch on. Jackery brings the retail counter: Costco, Home Depot, Best Buy. Since both companies draw warranty complaints, the store you buy from may end up protecting you better than either brand does.
Growth path
DELTA 2 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.
Explorer 1500 Ultra
FIXED CAPACITYFixed at 1,536Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 800W of solar. Suitable for a 1-2 panel setup.
Limited ports. You'll likely need a power strip or splitter.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The Explorer 1500 Ultra is sealed at 1,536Wh, which is fine if that covers you. The DELTA 2 Max starts at 2,048Wh and can grow beyond it with EcoFlow expansion batteries — real headroom the Explorer 1500 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 2 Max
Six months of real use left one reviewer's DELTA 2 Max with no structural degradation, still feeling like day one, which fits the LiFePO4 pack's 3,000-cycle rating and its thermal behaviourA3. The recurring complaint is the fans: they climb to around 52 dB under heavy load or while fast-charging, a Quiet Charging mode brings that down, and it costs charge time to use it. Six inches of clearance reportedly helps the airflowA1.
The wall charging is the standout, timed at 0-80% in about 50 minutesA2. Reviewers who flag the noise still land on buy-it-with-caveats, with the expandability and the ecosystem doing most of the persuadingA4.
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
Sources
powerstationadvisor.com · pcworld.com · thesolarlab.com · protoolsadvisor.com · trailandkale.com
Jackery Explorer 1500 Ultra
The Explorer 1500 Ultra is a CES-2026 launch, so what exists is reviewer testing rather than owners two winters inB4. Within that limit it reads well: a 9.1/10 score built on three specifics, namely the IP65 certification, the 1.5-hour AC recharge, and the 4,000-cycle LFP pack under a five-year warrantyB1B3B4. The sealed titanium-alloy cooling structure is what earns the IP65 rating rather than a claim layered on top of itB1.
Weight checks out in hand at about 38 lb, close enough to the 38.6 lb on the spec sheetB2. What nobody can tell you yet is how it behaves in year three, because nobody owns one that old.
“Built around a 1,536Wh LFP battery with a true IP65 dustproof and water-resistant rating — unique in its price bracket — and a fully sealed titanium-alloy multi-layer cooling structure; totally protected against dust, and resistant to low-pressure water jets, heavy rain, and splashes.”
Sources
backuppowerhub.com · gearbrain.com · protoolreviews.com · jackery.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
- Solid LFP durability, fast charging, and ecosystem/expandability are the praise; loud fans under heavy load or charging are the recurring complaint. [DELTA 2 Max · 3 entries]
- IP65 ruggedness (unique at its price), fast recharge, and the 4,000-cycle LFP battery are the standout praise; it is a newer CES-2026 launch so long-term owner data is thin. [Explorer 1500 Ultra · 3 entries]
- A1
“Fan noise is a significant issue — cooling fans can get loud, around 52 dB during heavy loads or charging; a Quiet Charging mode reduces noise but extends charge time, and giving it 6 inches of clearance helps airflow.”
powerstationadvisor.com / pcworld.com — DELTA 2 Max review · 2025-2026 · [negative]
- A2
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
thesolarlab.com / protoolsadvisor.com — DELTA 2 Max review · 2025-2026 · [positive]
- A3
“LiFePO4 chemistry rated for 3,000+ cycles to 80% with superior thermal stability; after 6 months of real use there was no structural degradation and it felt as solid as day one.”
powerstationadvisor.com / trailandkale.com — DELTA 2 Max review · 2025-2026 · [positive]
- A4
“Reviewers say it's still worth buying but with caveats — a versatile unit with expandability and ecosystem compatibility.”
thesolarlab.com / powerstationadvisor.com — DELTA 2 Max review · 2025-2026 · [mixed]
- B1
“Built around a 1,536Wh LFP battery with a true IP65 dustproof and water-resistant rating — unique in its price bracket — and a fully sealed titanium-alloy multi-layer cooling structure; totally protected against dust, and resistant to low-pressure water jets, heavy rain, and splashes.”
backuppowerhub.com / gearbrain.com — Explorer 1500 Ultra review · 2026 · [positive]
- B2
“Weighs about 38 lbs, which Jackery claims is up to 53% lighter than comparable competitor units of similar capacity.”
protoolreviews.com / jackery.com — Explorer 1500 Ultra · 2026 · [positive]
- B3
“1.5-hour AC recharge via ChargeShield 2.0, with a 4,000-cycle LFP battery and a 5-year warranty.”
backuppowerhub.com / thesolarlab.com — Explorer 1500 Ultra review · 2026 · [positive]
- B4
“Reviewers score it 9.1/10; its three defining strengths are the IP65 certification, a 1.5-hour AC recharge, and the 4,000-cycle LFP battery with a 5-year warranty.”
thesolarlab.com / backuppowerhub.com — Explorer 1500 Ultra review · 2026 · [positive]
Research compiled August 9, 2026.
Who Should Buy Which
Buy the DELTA 2 Max if you…
- →You are buying for outages. It covers the eight-hour blackout profile with energy left over and refills faster from panels the next morning.
- →Your loads are going to grow. It starts at 2,048Wh and accepts EcoFlow expansion batteries, which is a door the Jackery does not have at any price.
- →The unit is going to live in one place, a closet or a basement or a shelf in the garage, and get carried maybe twice a year.
- →You want the most watt-hours per dollar on this page and can live with a fan you will hear while it chargesA1.
Buy the Explorer 1500 Ultra if you…
- →It goes outside and stays outside. Dust, rain, a truck bed, a job site: the IP65 rating is the real product hereB1.
- →You lift it often. 38.6 lb against 50.7 lb is 12 lb you feel on every trip between the tailgate and the campsite.
- →Your loads are small and known, like a CPAP, a laptop and lights, and 1,306Wh of usable energy covers them with room to spare.
If neither fits
If your day looks like the van-life profile at 4,685Wh, close this tab. That is close to three full charges of the larger unit here, so you would spend the day tethered to panels and still fall behind. You want a bigger class of battery, or a modular system sized to cycle that much daily, not a 1-2kWh box. The same applies if your weekend camping load genuinely is 2,100Wh in one go, because both of these come up short before Sunday.
The Bottom Line
Take the DELTA 2 Max. It costs $150 less, holds 512Wh more, and the durability rating that was supposed to justify the Jackery's premium turns out to deliver exactly the same energy over the life of the pack. When the cheaper unit is also the bigger one, the argument ends early.
The exception is physical and worth saying plainly: if this battery gets lifted, carried and rained on, the Explorer 1500 Ultra's lighter frame and IP65 seal are worth real moneyB1, and the EcoFlow's fans are a sound you will hear while it chargesA1. Everyone else should buy the bigger battery and stop thinking about it.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Which one is better for a power outage?
The DELTA 2 Max. On the eight-hour blackout profile we model at 1,645Wh, it finishes with energy to spare while the Explorer 1500 Ultra runs out before the power comes back. It also accepts 1,000W of solar against the Jackery's 800W, so if the outage runs into a second day it is back to full sooner.
Is the Explorer 1500 Ultra's 4,000-cycle battery worth paying more for?
No, because the pack behind it is smaller in the same proportion. 1,536Wh times 4,000 cycles and 2,048Wh times 3,000 cycles both come to 6,144 kWh of lifetime energy, so the higher cycle rating delivers an identical total in more, smaller charges. A cycle count only means something once you multiply it by capacity.
Can either of these run a van full-time?
No. A full van-life day in our model draws 4,685Wh, and the larger of these two gives you 1,741Wh of usable energy per charge. You would be recharging two to three times a day, which neither unit's solar input supports. Look at a bigger class of battery or a modular setup built for daily cycling.
How much heavier is the DELTA 2 Max?
12.1 lb heavier: 50.7 lb against 38.6 lb. Both are two-handed lifts, so the difference is not between easy and hard, it is between a unit you will happily move every weekend and one you will leave where it sits. If it never leaves your house, weight is the least important spec on this page.
Is the DELTA 2 Max loud?
Under heavy load or while fast-charging, reviewers put its cooling fans at around 52 dB, and a Quiet Charging mode lowers that at the cost of charge time. At light loads, like a CPAP overnight, neither unit is working anywhere near hard enough for that to apply. Plan around it only if the unit will be refilling in a room you are sitting in.
Brand matchup
EcoFlow vs Jackery: measured across every matchup →Where to buy
EcoFlow DELTA 2 MaxPick
$1,049.00
$1,049.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
Jackery Explorer 1500 Ultra
$1,199.00
$1,199.00 · direct from Jackery
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.