Head-to-head test
EcoFlow DELTA Pro Ultra + 1 Battery vs Jackery Explorer 1000 v2
These cost the same per watt-hour ($0.49 against $0.47), so this was never a value question: it is whether the thing has to leave the room, because one weighs 23.8 lbs and the other 293.6.
Full profiles: EcoFlow DELTA Pro Ultra + 1 Battery → · Jackery Explorer 1000 v2 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$5,999.00 · direct from EcoFlow
Last checked 8 hours ago. Prices move — check before you buy.
$499.00 · direct from Jackery
Last checked 8 hours ago. Prices move — check before you buy.
Spec deltas
Divide each price by its battery and this comparison is settled before it starts: $5,999 across 12,288Wh is 49 cents per watt-hour, and $499 across 1,070Wh is 47 cents. So the expensive one is not expensive. It is just bigger, about twelve times the price for about eleven and a half times the energy, which is as close to the same deal as two power stations get.
The same multiple shows up in the one place it cannot be financed. One of these is a two-person lift that gets sited once and never moved again; the other travels in the back seat and comes upstairs in one hand. That is not a spec difference, it is a category difference, and no quantity of watt-hours crosses it.
So there is no winner here in the usual sense, and pretending otherwise is how people spend $5,999 on the wrong shape. Answer one question instead: does the power have to move? Everything below is about how confidently you can answer it, including the weekend where the honest answer is yes and also more than 1,070Wh, which is the one trip neither of these covers.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
Now weigh them. 293.6 lbs against 23.8 lbs is 12.3x, so mass scales with money and capacity in near lockstep, and the energy density barely moves either (12,288 / 293.6 is 41.9Wh per pound; 1,070 / 23.8 is 45.0). The DELTA Pro Ultra is not a denser or cleverer battery. It is the same arithmetic piled up until it can no longer be carried, and the bill for that quantity is paid in placement rather than in dollars per watt-hour.
DELTA Pro Ultra + 1 Battery: 12,288Wh, $5,999, $0.49 per watt-hourExplorer 1000 v2: 1,070Wh, $499, $0.47 per watt-hourboth packs carry a 4,000-cycle minimum rating, and both land at $0.12 per lifetime kilowatt-hourweights: 293.6 lbs and 23.8 lbs
Why it mattersIf you were hoping the expensive unit was the better battery, stop comparing value and go measure the patch of floor where it would live.
solar input
The DELTA Pro Ultra's 12,288Wh at 5,600W of input refills in roughly two hours of full-rated sun, so the big unit is the quicker one to fill in wall-clock terms as well as the larger one. The Explorer's real ceiling is not its 1,070Wh, it is throughput: energy only goes in at 400W, which caps how much of a day it can ever cover no matter how many panels you buy.
Explorer 1000 v2: 910Wh usable after the flat 85% derate applied to every unit here, 400W maximum solar inputVan Life Daily needs 4,685Wh; the 8-Hour Blackout needs 1,645WhDELTA Pro Ultra + 1 Battery: 10,445Wh usable, 5,600W maximum solar input
Why it mattersIf you are sizing for repeated days off-grid, count refills rather than watt-hours. The small unit runs out of daylight long before it runs out of cycles.
continuous output
Where the big unit actually wins these rows is energy, not muscle: the van-life day asks for 4,685Wh behind a 150W peak, and the Explorer fails it on watt-hours while starting it without effort. A 7,200W inverter is bought for the loads that never get unplugged, the well pump and the compressor and the circuit in the panel. If your list is laptops, lights, a fridge and a CPAP, that inverter is an expensive thing to leave switched on.
DELTA Pro Ultra + 1 Battery: 7,200W continuous, 10,800W surgeExplorer 1000 v2: 1,500W continuous, 3,000W surgethe largest startup peak in any of the six scenarios here is 400W, at the tailgate, and both units start every one of themVan Life Daily: 4,685Wh needed, 150W peak
Why it mattersCheck whether one single device you own draws more than 1,500W. If none does, output is not a reason to buy the bigger unit and the surge figures decide nothing.
The specific dimensions that decide these two units — everything else is a tie.
Portability & Form Factor
Selected because: 293.6 lbs against 23.8 lbs is the one spec here you cannot argue with: one unit travels, the other gets sited.
weight
Two people, one decision, and you only get to make it once. 293.6 lbs does not go down basement stairs or up over a tailgate by hand, so the DELTA Pro Ultra + 1 Battery's location becomes a permanent feature of the house, chosen before the first watt-hour ever leaves it. Think about the cable runs from that spot to the things you actually want powered, because that distance is now part of the product.
The Explorer 1000 v2 goes wherever you go. 23.8 lbs is a bag of groceries, so it rides in the back seat, gets carried to the second floor, and comes back. That mobility does more work than any figure on its spec sheet: it is why the 670Wh tailgate belongs to it outright, and why a 1,070Wh ceiling is forgivable. A box you can move to the load never has to be sized for every load in the house.
Your Life, Your Pick
Selected because: The six loads split cleanly. The Explorer covers the 320Wh CPAP night and the 670Wh tailgate, and misses the 1,645Wh blackout and the 4,685Wh van-life day.
The split is arithmetic meeting geography. The Explorer 1000 v2 covers the 320Wh CPAP night nearly three times over and clears the 670Wh tailgate with 240Wh spare. Then the loads get bigger and it simply stops: 736Wh short of the 1,645Wh blackout, 3,776Wh short of a 4,685Wh van-life day. Nothing close about it in either direction.
Watch the Remote Workday row, because it is the most honest line on the page. The Explorer passes at exactly 910Wh needed against 910Wh usable, which is a pass with nothing behind it. A zero-margin pass is not something to plan around: one extra call, one more laptop top-up, one phone that arrived nearly empty, and the day you budgeted for is not the day you got.
Lifetime Value
Selected because: At $0.49 against $0.47 per watt-hour, and $0.12 per lifetime kilowatt-hour for both, neither unit is the bargain and price cannot break this tie.
Twelve times apart on the sticker, and the cost per lifetime kilowatt-hour is the same twelve cents. Both packs carry a 4,000-cycle minimum rating, so the energy each will deliver across its life scales with capacity exactly as the price does: 49,152 kWh from the DELTA Pro Ultra, 4,280 kWh from the Explorer. Nobody here is getting a deal and nobody is being fleeced.
Which means you cannot spend your way out of this decision. There is no price gap to exploit, only a size gap, and price is therefore the one thing that cannot break the tie. The single figure that is not a wash is purchase price per warranty year: $600 against $100. Read that as a statement about how much machine you bought, not about how well it is covered.
What the Specs Don't Tell You
Selected because: The five flags on this pair (weight, expansion, surge, UPS and warranty) are where a $5,999 appliance and a $499 box stop resembling each other.
The weight flag is the one that should change behaviour, and it carries a warning rather than a footnote for good reason: this unit is placed, not carried, and everything else follows from where you put it. Expansion is the only flag pointing at the Explorer, and it points somewhere specific. The growth path past 1,070Wh runs through EcoFlow expansion batteries toward partial-home backup, not toward a bigger unit you can still lift.
The rest reward reading in the right order. The two surge numbers disagree on purpose: the Explorer keeps more headroom above its own rating (2x against 1.5x) while the DELTA Pro Ultra holds the far higher absolute ceiling at 10,800W, and since a motor pulls watts at switch-on rather than a multiple of somebody else's rating, the ceiling is the figure that starts things. On UPS, read the labels as labels. The DELTA Pro Ultra is rated as a no-break 0ms design and the Explorer at no worse than 20ms, both of them maker classifications rather than stopwatch results, which matters only if a desktop with unsaved work is what you are protecting. And register the Jackery the week it arrives: its five years is three plus two, with the back two contingent on registration, while the EcoFlow's figure is ten. In year six, only one of these is still covered by anybody.
Brand Trust
Selected because: Ten warranty years with EcoFlow against five with Jackery, and with both brands the advice lands in the same place: buy where you can return it.
A ten-year warranty is a ten-year relationship, and on a unit at this price that relationship is most of what you own after the cells. EcoFlow brings the deepest lineup in the category and the strongest app scores of the major brands (4.6 on iOS across roughly 8,400 ratings, 4.2 on Android across roughly 17,000), plus the largest subreddit in the space, where somebody has already had your problem at midnight. It also brings two things worth knowing before you commit: it tested subscription paywalls for advanced app features in early 2025 before backing off, and it offers no parts or service once the warranty ends.
Jackery's trade runs the other way. Its app is the weakest of the major brands, rated 2.3 to 3.3 and split across two confusing apps that want a login even offline, and its community is the smallest at roughly 2,000 members. Against that, you can buy an Explorer 1000 v2 at Costco, Home Depot, Best Buy or Amazon this afternoon and walk it back in if you hate it. On a $499 box you can carry into a store, a weak app is an annoyance you route around. On an appliance you cannot carry anywhere, software and support are the entire after-sale experience.
Strengths & trade-offs
EcoFlow DELTA Pro Ultra + 1 Battery
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$5,500) than the Explorer 1000 v2.
- –Significantly heavier (+269.8 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
Jackery Explorer 1000 v2
Strengths
- +Costs $5,500 less
- +Lighter by 269.8 lb
Trade-offs
- –Weaker inverter (-5,700W) limits appliance compatibility.
- –Sealed capacity — the DELTA Pro Ultra + 1 Battery can add batteries to grow past 1,070Wh; 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
Two ways to fail a camping trip, and these units take one each. The Explorer 1000 v2 covers about 43% of the 2,100Wh weekend and comes home early; the DELTA Pro Ultra + 1 Battery has the energy five times over and no way to reach the campsite. The fix for the Explorer is not a bigger box, it is daylight: it accepts 400W of solar, enough to put its whole 1,070Wh back in roughly two and a half hours of strong sun, which is how a unit that fails this row on battery alone still gets you through a weekend when the weather cooperates.
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 Ultra + 1 Battery
An outage does not check your capacity first. The Explorer 1000 v2 stops 736Wh short of the 1,645Wh this night needs, a little over half the night on 910Wh usable. The DELTA Pro Ultra + 1 Battery finishes with 8,800Wh untouched, which is another five nights at the same load, and that is the point at which its 5,600W of solar input matters more than its outlet count.
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, and not closely enough to study: 320Wh is 3% of one unit's usable energy and about a third of the other's. So ignore capacity and look at the room instead. The Explorer 1000 v2 is 23.8 lbs, which means it sits on the floor by the bed and comes along to the hotel. The DELTA Pro Ultra + 1 Battery is wherever it was installed, so a 40W load means running an extension cord across the house to use 3% of the more expensive unit. Buy the one you can pick up.
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 Ultra + 1 Battery
The Explorer 1000 v2 passes this row, and you still should not relax. 910Wh needed against 910Wh usable is a pass with nothing behind it, so any unplanned draw comes out of a budget already spent: one more call, a second laptop, a phone that showed up nearly empty. The DELTA Pro Ultra + 1 Battery clears the same day at 9% used with 9,535Wh banked, which is the same workday with the arithmetic switched off. If your days ever run long, the zero-margin pass is the thing to be honest about.
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
Explorer 1000 v2
The DELTA Pro Ultra + 1 Battery at 293.6 lbs is not a take-along — it rolls off a truck bed if it travels at all, so this scenario belongs to the Explorer 1000 v2 by default — and it earns it, covering the 670Wh with 240Wh to spare. Capacity was never the DELTA Pro Ultra + 1 Battery's problem here; getting to a tailgate was.
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
DELTA Pro Ultra + 1 Battery
A 4,685Wh day is where capacity stops being a talking point. The Explorer 1000 v2 covers about a fifth of it and finishes 3,776Wh short; the DELTA Pro Ultra + 1 Battery runs the day at 45% used with 5,760Wh left at dawn. The catch is that winning this row means installing a two-person appliance in a vehicle and never moving it again, which is a payload and floor-plan decision before it is a power decision. Builds with this much daily draw usually end up here anyway. Just go in knowing you are installing an appliance rather than packing a battery.
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 Pro Ultra + 1 Battery runs 51h vs 4.4h.
$5,999 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 0–696.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–139.3hHigh-Draw Appliances
These reveal the real limitsscale 0–10.4h¹ 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
September 13, 2026
Verdict: the DELTA Pro Ultra + 1 Battery, on Power Score margin
A tie, and not the boring kind. At $0.49 and $0.47 per watt-hour, and an identical $0.12 per lifetime kilowatt-hour on 4,000 rated cycles each, neither unit is the better deal: they are the same battery economics at two scales. That leaves one question, answerable in a second. Does the power have to move? If yes, the Explorer 1000 v2 is the only candidate here and $499 buys it. If no, and you are covering a 4,685Wh day or a circuit in the panel from a permanent spot, the DELTA Pro Ultra + 1 Battery's 12,288Wh is the only thing on this page that finishes. What you should not do is buy the $5,999 appliance hoping it is a better battery, or the $499 box hoping it scales.
Editor-assigned confidence, based on cited owner research and spec analysis.
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated September 13, 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, Solar Generator, Tailgating, Food Truck, Apartment Balcony, Camping.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA Pro Ultra + 1 Battery rates 3.7/5 (25th percentile of 29 Whole-Home / Off-Grid-class units), and Explorer 1000 v2 rates 4.0/5 (38th 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.
293.6 lbs: You Get One Placement
A two-person lift and a one-time decision. Measure the doorway, pick the spot with the shortest cable runs to the things you actually want powered, and accept that the unit is now part of the room. None of the rest of this spec sheet survives putting it somewhere you regret.
Sealed at 1,070Wh, and the Alternative Is Not Lighter
The Explorer 1000 v2 has no expansion path, so the capacity you buy is the capacity you own and outgrowing it means a second unit. The DELTA Pro Ultra + 1 Battery does have somewhere to go, since EcoFlow expansion batteries stack on top of 12,288Wh, but be clear about the direction that road runs. It heads toward partial-home backup, not toward a larger unit you can still carry. If the growth plan is more trips rather than more house, the sealed box is not what is holding you back.
Two Surge Numbers, Neither Decisive Here
The Explorer 1000 v2 keeps more headroom above its own rating (2x against 1.5x) while the DELTA Pro Ultra + 1 Battery holds the higher ceiling at 10,800W, and since a motor pulls watts at switch-on rather than a multiple of someone else's rating, the ceiling is what starts a compressor. Worth saying plainly, though: the biggest startup spike in any scenario on this page is 400W, and both units swallow it without noticing. Surge settles nothing between these two until you are starting loads that are wired in rather than plugged in.
UPS Switchover: 0ms-rated vs ≤20ms
Both list a UPS mode, at different rated speeds. The DELTA Pro Ultra + 1 Battery is rated 0ms — a no-break design on paper, which is the maker's classification rather than a stopwatch result. The Explorer 1000 v2 is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Ten Years Against Five, and One Has a Condition
Register the Jackery the week it arrives. Its five years is three plus two, and the back two depend on registration, which makes a ten-minute task the difference in year four. The DELTA Pro Ultra + 1 Battery is listed at ten years, and on a unit this expensive that is most of the reason to care about the brand at all: in year six, only one of these two is still covered by anyone.
Ownership 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 cost the same to own over their rated lives — $0.12/kWh each. Lifetime cost can't separate them, so decide on the sticker price and everything else. One thing to know reading the table: both carry the same 4,000-cycle rating, so the lifetime rows are sticker price and capacity in disguise — the wear horizon is identical and decides nothing here.
Brand trust
EcoFlow
Ecosystem
The deepest lineup in portable power, 12 to 15 models across DELTA Pro, DELTA 3 and RIVER 3, plus panels and smart home panels. At the top of that range the DELTA Pro Ultra platform stacks batteries and inverters toward whole-home backup, which is a flagship path rather than something the rest of the line does.
Support
US phone, email and chat, and the experiences split hard. Plenty of hassle-free prepaid-label replacements, and plenty of long waits and refurbished units sent against claims on new hardware. Buying through Costco or Amazon gives you a second, better-behaved path when a claim goes sideways.
Community
The largest in the category by a distance, on Reddit and on an official forum of its own. On a unit this complicated that is a real feature, because somebody has already had your problem at midnight.
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
The fastest-charging technology in the category, the most active release cadence, and the best app of the major brands by a wide margin.
Worth knowing
EcoFlow tested subscription paywalls for advanced app features in early 2025 and backed off after community pushback, and it offers no parts or service once the warranty is done. On a ten-year purchase, both are worth filing away.
Jackery
Ecosystem
12 to 15-plus models across Explorer portables and HomePower home backup, plus the SolarSaga panels and the occasional genuinely odd form factor, from a solar gazebo to a solar robot.
Support
US-based and widely criticised: slow or scripted replies, strict receipt requirements on warranty claims, refurbished replacements for clearly faulty units. The workaround is the same thing that makes Jackery convenient in the first place. Buy it somewhere that takes returns.
Community
The smallest of the major brands, roughly 2,000 members on Reddit. YouTube coverage is broad because the brand is famous, which is not the same as having somebody to ask.
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 to Home Depot to Best Buy to Amazon, with the brand recognition to match. Dependable and everywhere, which for a box you carry is most of what you want.
Worth knowing
The app is the weakest of the major brands, split across two confusing apps that want a login even offline. A couple of older Jackery models still ship NMC chemistry with a shorter rated life, so check the cycle rating on whatever you actually buy. This one is LFP, rated 4,000 cycles.
Analyst note
Both brands earn exactly the same piece of advice, which tells you something: buy from a retailer with a return window, because neither support organisation is a reason to pick a side. After that the trade is clean. EcoFlow gives you the software and the crowd that knows the product, and asks you to accept a company that has experimented with charging for app features and will not service the unit out of warranty. Jackery gives you a box you can return to a shelf you can drive to, and asks you to live with the worst app in the category. On something you carry, that is a fair trade. On something you install for ten years, it is less obviously fair.
Growth path
DELTA Pro Ultra + 1 Battery
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 12,288Wh.
Accepts up to 5,600W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Explorer 1000 v2
FIXED CAPACITYFixed at 1,070Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 400W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The Explorer 1000 v2 is sealed at 1,070Wh, which is fine if that covers you. The DELTA Pro Ultra + 1 Battery starts at 12,288Wh and can grow beyond it with EcoFlow expansion batteries — real headroom the Explorer 1000 v2 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 Pro Ultra + 1 Battery
Start with what is not there. Our research found commentary on this exact configuration to be sparse: no field accounts at all of the +1 Battery setup, nothing on durability past six months, nothing on cold-weather behaviour, and nothing on how the UPS actually behaves when the lights go outA0. On a $5,999 purchase that absence is itself a finding, because it means buying on the spec sheet and the brand.
What does exist is one detailed owner thread, and it reads as software and radio grievances rather than failuresA0. The same owner reports no state-of-charge graph in the app despite charts for input and output, and a displayed percentage that slid from 90% to 8% after a few nights of use and rechargeA8A9. Metering, most likely, but metering is how you know what you have. The unit also interfered with common radio frequencies with the inverter idle, and EcoFlow's support suggested a Faraday cageA6A7. One owner sums the purchase up as kind of meh and says they are unlikely to expand it or wire it into the houseA4; another notes there is no real manual beyond a thin web guideA5. One more grumbles that the fans always seem to runA1, and two further fan entries in our ledger may describe a competitor's inverter rather than this unit, so nothing here rests on themA0A2A3.
“When the fans are not on, the inverter emits zero noise...even when I put my ear against the case.”
Sources
windinmyface.com · diysolarforum.com
Jackery Explorer 1000 v2
The Explorer 1000 v2's record is review coverage rather than long-term ownership, and it is consistent: light, quick to fill, quiet, an LFP pack rated 4,000 cycles, with 1,500W continuous named as the one real limitB0B4. Reviewers single out the 23.8 lb carry as genuinely easy for a 1kWh-class unitB1, and report the app's emergency charge mode filling it from empty in about 60 to 65 minutesB3. That last one is the practical answer to a small battery: it refills between uses instead of being sized for all of them.
The gap is the same gap as on the other side, in a milder form. These are reviews rather than year-three reports, so the 4,000-cycle figure is still a ratingB2 rather than an observed outcome. On a $499 unit that is a much smaller bet to place on a spec sheet.
“At just 23.8 lbs it's easy to lift and carry — light for a 1kWh-class unit.”
Sources
backuppowerhub.com · outdoortechlab.com · rvoutfitting.com · thesolarlab.com · amusthavething.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
- SoC/battery metering appears unreliable, with reported percentage dropping much faster than expected after resuming charge cycles [DELTA Pro Ultra + 1 Battery · 2 entries]
- Support interactions were unhelpful or dismissive when owners raised specific technical issues (manual gaps, RFI, missing SoC graph) [DELTA Pro Ultra + 1 Battery · 3 entries]
- Fan behavior/noise is a recurring point of owner scrutiny, though direct DPU-specific noise data is thin and partly inferred from sibling EG4 units [DELTA Pro Ultra + 1 Battery · 3 entries]
- Light weight, fast ~1-hour charging, quiet operation, and a 4,000-cycle LFP battery make it a well-balanced value favorite; the main limit is 1,500W output. [Explorer 1000 v2 · 3 entries]
- A1
“Yuck—fans always run even on the expensive high end Delta Pro Ultra?”
windinmyface.com blog — 'Fan Noise with Solar Power / Solar Generators (Anker, Ecoflow, EG4)' (comment thread) · 2024-12 · [negative]
- A2
“When the fans are not on, the inverter emits zero noise...even when I put my ear against the case.”
windinmyface.com blog — 'Fan Noise with Solar Power / Solar Generators (Anker, Ecoflow, EG4)' (owner test notes, related EG4 12kPV/18kPV comparison to DPU) · 2024-12 · [positive]
- A3
“At 6.3kW of load, the fan turned on... The fans turned off when I reached about 4.5kW. This is probably the expected hysteresis behavior.”
windinmyface.com blog — 'Fan Noise with Solar Power / Solar Generators (Anker, Ecoflow, EG4)' (thermal/fan behavior test, note: performed on EG4 18kPV, referenced as comparison point to DPU) · 2024-12 · [mixed]
- A4
“Pulled the trigger on an EcoFlow Delta Pro Ultra (DPU) and I'm kind of meh on it and unlikely to expand or integrate it into the house.”
diysolarforum.com — 'EcoFlow Delta Pro Ultra issues' · 2024-02 · [negative]
- A5
“No real manual. All they have is the web user guide which is superficial if I'm being generous.”
diysolarforum.com — 'EcoFlow Delta Pro Ultra issues' · 2024-02 · [negative]
- A6
“Even when the inverter is not running, it interferes with common frequencies like 146.520MHz... Turn off the DPU, emission goes away.”
diysolarforum.com — 'EcoFlow Delta Pro Ultra issues' · 2024-02 · [negative]
- A7
“I contacted EcoFlow support and they told me I could put it in a "faraday cage".”
diysolarforum.com — 'EcoFlow Delta Pro Ultra issues' · 2024-02 · [negative]
- A8
“No State of Charge graph in the app. Figured if they were showing charts of Input and Output over time, they must have a SoC chart. Nope.”
diysolarforum.com — 'EcoFlow Delta Pro Ultra issues' · 2024-02 · [negative]
- A9
“After a few days of using it overnight and letting it charge back up to "90%", it'd go from "90%" down to "8%".”
diysolarforum.com — 'EcoFlow Delta Pro Ultra issues' · 2024-02 · [negative]
- B1
“At just 23.8 lbs it's easy to lift and carry — light for a 1kWh-class unit.”
backuppowerhub.com / outdoortechlab.com — Explorer 1000 v2 review · 2026 · [positive]
- B2
“Moves to LiFePO4 chemistry rated for 4,000 charge cycles before capacity drops, dramatically increasing lifespan over the original lithium-ion model.”
backuppowerhub.com / rvoutfitting.com — Explorer 1000 v2 review · 2026 · [positive]
- B3
“Fast AC charging — consistently reached 100% in about 60-65 minutes from empty via the app's emergency charge mode, a big improvement over the original's long wait.”
thesolarlab.com / outdoortechlab.com — Explorer 1000 v2 review · 2026 · [positive]
- B4
“One of the strongest mid-size portable power stations of 2026, striking an excellent balance of portability, fast charging, quiet operation, and long-term battery reliability; pushes 1,500W continuous with a 3,000W surge.”
backuppowerhub.com / amusthavething.com — Explorer 1000 v2 review · 2026 · [positive]
Research compiled September 13, 2026.
Who Should Buy Which
Buy the DELTA Pro Ultra + 1 Battery if you…
- →You already know the spot: utility room, garage wall, a corner of the basement, and two people to put it there once. That sentence has to be true before anything else on this spec sheet matters.
- →Your daily draw is van-life scale or larger. A 4,685Wh day leaves it at 45% used with 5,760Wh still banked at dawn, and nothing else on this page finishes that day.
- →You want the option to add capacity later. It takes EcoFlow expansion batteries on top of 12,288Wh, and that road leads toward partial-home backup rather than a lighter camping kit.
- →What you are protecting is a desktop with unsaved work in the same room as the unit, and you would rather have the no-break 0ms UPS rating than a no-worse-than-20ms one.
Buy the Explorer 1000 v2 if you…
- →The power has to come with you: tailgate, campsite, second floor, back seat. 23.8 lbs is the whole argument, and it covers the 670Wh tailgate with 240Wh spare.
- →You are running a CPAP. A 320Wh night is about a third of its 910Wh usable, so one charge is nearly three nights, and it can sit on the floor beside the bed rather than wherever an appliance got installed.
- →You want an LFP pack with a 4,000-cycle rating for $499 and you already know 1,070Wh is enough. There is no expansion path, so that judgement is the purchase.
- →You work away from an outlet one day at a time. It finishes the 910Wh workday exactly, so treat it as a one-laptop day rather than a flexible one.
If neither fits
The camper who needs 2,100Wh for a weekend should close both tabs. The Explorer covers about 43% of that trip and the DELTA Pro Ultra is not coming along, so the unit being shopped for is a portable in the two-to-three kilowatt-hour class, which is a category neither of these is in. Same answer if what you want is van-life energy in something carryable: at 4,685Wh a day, the box that finishes is the one you cannot lift, and the box you can lift covers about a fifth of it. That product is not on this page, and buying either of these instead of waiting for it is the expensive mistake.
The Bottom Line
Same battery economics, opposite shapes. Two cents apart per watt-hour and identical at twelve cents per lifetime kilowatt-hour means there is no bargain to find here, and the multiple that decides things is the one measured in pounds: about twelve times the energy arriving as about twelve times the mass. One of these travels. The other gets installed.
So answer the question and then buy quickly. If the power has to move, the Explorer 1000 v2 is the only candidate and its 1,070Wh ceiling is the price of being able to lift it. If it never moves and whole days or a circuit in the panel have to come from one box, the DELTA Pro Ultra + 1 Battery is the only thing here that finishes, and you should choose the spot before you choose the unit. And if you came for a powered 2,100Wh weekend, buy neither and go look at a mid-size portable. That is a category, not a compromise.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the Jackery Explorer 1000 v2 get me through a blackout?
Part of one. Against the eight-hour outage profile we model, which needs 1,645Wh, it has 910Wh usable and finishes 736Wh short, so it covers roughly 55% of the night. It will keep a router, lights and phones going far longer than that; what it will not do is carry a full household load until morning. The DELTA Pro Ultra + 1 Battery covers the same night with 8,800Wh untouched.
Is the EcoFlow DELTA Pro Ultra + 1 Battery portable?
No, and treating it as portable is the main way to buy it wrong. It weighs 293.6 lbs, which is a two-person placement, and once placed it is not coming on a trip. Plan the cable runs from wherever it lands. If you need power that travels, the Explorer 1000 v2 at 23.8 lbs is the unit on this page that does that.
Why does the DELTA Pro Ultra cost twelve times as much as the Explorer 1000 v2?
Because it holds about eleven and a half times the energy: 12,288Wh against 1,070Wh, for $5,999 against $499. Per watt-hour the two are two cents apart, $0.49 against $0.47, and across their rated 4,000 cycles both work out to $0.12 per lifetime kilowatt-hour. You are paying for quantity at the going rate, not paying a premium for a better battery.
Can both of these run a CPAP overnight?
Yes, and comfortably. A CPAP is about 40W, so a full night is roughly 320Wh: 3% of the DELTA Pro Ultra + 1 Battery's usable energy and about a third of the Explorer's 910Wh, which is nearly three nights on one Explorer charge. For a job this small the deciding factor is which one can sit next to the bed, and that is the 23.8 lb unit.
Can I add batteries to the Jackery Explorer 1000 v2 later?
No. It is sealed at 1,070Wh, so the capacity you buy is the capacity you keep and the upgrade path is a second unit. The DELTA Pro Ultra + 1 Battery does accept EcoFlow expansion batteries, but it starts at 12,288Wh and that path heads toward partial-home backup, which is well past what anyone shopping a 1kWh box was trying to solve.
Brand matchup
EcoFlow vs Jackery: measured across every matchup →Related comparisons
Where to buy
EcoFlow DELTA Pro Ultra + 1 Battery
$5,999.00
$5,999.00 · direct from EcoFlow
Last checked 8 hours ago. Prices move — check before you buy.
Jackery Explorer 1000 v2
$499.00
$499.00 · direct from Jackery
Last checked 8 hours ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.