Head-to-head test
EcoFlow DELTA Pro Ultra + 2 Batteries vs Jackery Explorer 5000 Plus Double Kit
This is a capacity-per-decade versus output-per-pound fight: the DELTA Pro Ultra's 18,432Wh bank costs twelve cents a lifetime kilowatt-hour, but the Explorer 5000 Plus Double Kit answers with double the continuous wattage at 136 fewer pounds and $1,000 less upfront.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA Pro Ultra + 2 Batteries
14,547Power Score · Whole-Home Capable
$7,899.00 list · direct from EcoFlow
Jackery
Explorer 5000 Plus Double Kit
13,691Power Score · Whole-Home Capable
$5,999.00 list · direct from Jackery
Spec deltas
Twelve cents a kilowatt-hour is what the DELTA Pro Ultra + 2 Batteries costs to own over its full 3,500-cycle life; the Explorer 5000 Plus Double Kit costs seventeen. That five-cent gap is the whole argument for EcoFlow, and it's a real one at this price tier, where the difference between the two systems' lifetime energy bill comes to hundreds of dollars.
But the Jackery isn't losing on capacity, it's losing on a different axis entirely. Its Double Kit puts out 14,400W continuous against the EcoFlow's 7,200W, doubles the surge headroom that matters when a well pump or central AC kicks on, and does it all at 269 pounds versus the Ultra's 405.4. Two very different power stations are wearing the same 'whole-home backup' label.
Both are enormous, both are expandable, and both are built for people who never want to think about a blackout again. The decision comes down to whether you're optimizing for the lowest cost per kilowatt-hour over ten years, or for the lightest, most powerful box you can get for $1,000 less right now.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
A buyer looking only at the $7,999 versus $6,999 tags is reading the wrong number. Divide each system's price by what it will actually deliver over its cycle life and the Ultra is the cheaper machine, not the pricier one.
DELTA Pro Ultra + 2 Batteries: $7,999, 18,432Wh, $0.12 per lifetime kWh, 64,512 total lifetime kWhExplorer 5000 Plus Double Kit: $6,999, 10,080Wh, $0.17 per lifetime kWh, 40,320 total lifetime kWh
Why it mattersAnyone planning to keep the unit for years, not just a season, should price this by cost-per-kWh, not by the number on the box.
continuous output
Fridge and AC compressors routinely draw 2-3x their rated wattage for the first second of startup. A well pump plus a central AC starting at the same moment is exactly the load that trips an undersized inverter, and the Double Kit has more room to absorb that spike before anything faults.
Explorer 5000 Plus Double Kit: 14,400W continuous, 28,800W surge (2.0x rated)DELTA Pro Ultra + 2 Batteries: 7,200W continuous, 10,800W surge (1.5x rated)
Why it mattersHouseholds planning to run large appliances simultaneously, not just sequentially, should weight the Jackery's raw output and surge headroom over the EcoFlow's better cost-per-kWh.
weight
This is a system you install once in a garage or utility closet and never move again, not one you load into a truck bed for the weekend. The Double Kit, at a still-hefty 269 lbs, is at least a one-trip-with-wheels proposition; the Ultra's second battery is a two-person job every time it moves.
DELTA Pro Ultra + 2 Batteries weighs 405.4 lbs total; owners report each extra battery is 115 lbs and needs two people to move safelyA8Explorer 5000 Plus Double Kit weighs 269 lbs
Why it mattersBuyers who expect to relocate the unit between a garage, an RV, and a campsite should lean Jackery; buyers installing a permanent home backup system won't notice the extra weight after day one.
Most electronics ride through a 20ms gap without a hiccup, so this rarely decides the purchase on its own. But paired with a warranty that runs twice as long, the EcoFlow is the system that removes the question entirely and keeps removing it for five more years than the Jackery is covered.
DELTA Pro Ultra + 2 Batteries: 0ms switchover, 10-year warrantyExplorer 5000 Plus Double Kit: 20ms switchover, 5-year warranty
Why it mattersBuyers backing up sensitive electronics, or who just want the longer safety net on a five-figure purchase, get more of both from the Ultra.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The $0.12 vs $0.17 per-kWh gap is the strongest argument for the pricier unit and needs to lead
cost / lifetime kWh
Twelve cents a kilowatt-hour against seventeen. Once you've read that, the $1,000 price gap stops mattering, because the Ultra pays it back in energy delivered, not in years waited. Run the numbers the other way and the same story holds: $800 a year of warranty coverage against $1,400, over a warranty that's twice as long to begin with.
The catch EcoFlow doesn't advertise: owners of this exact configuration report the system can drain from 90% down to 8% over a few idle daysA6, and a separate reviewer measured a parasitic drain that would empty the base battery in about 60 hours with zero loadA7. A cheaper cost-per-kWh only holds if the unit isn't quietly leaking energy while you're not looking.
PowerScore Breakdown
Selected because: EcoFlow edges the aggregate score despite losing on raw wattage, worth explaining why
overall power score
14,534 against 13,583 is a narrow lead, and it's a slightly counterintuitive one: the Jackery wins outright on output, surge, cycle life, and solar ceiling, yet the EcoFlow's bigger capacity and longer warranty pull the aggregate score back in its favor.
Treat the score as a tiebreaker, not a verdict. It tells you these are close, evenly matched systems built by different philosophies, not that one is obviously better hardware.
Portability & Form Factor
Selected because: 136-lb gap and two-person battery packs change how each system actually lives in a garage
weight
405.4 lbs is a system you site once and leave. 269 lbs is a system you can still move, if reluctantly. Neither is a camping cooler, but only one of them ships with battery packs an owner needed a second person to liftA8.
There's a second wrinkle to the Ultra's extra battery: one owner noticed the pack closer to the inverter running about 10 degrees warmer than the one below it, even after swapping their positionsA11, and flagged that a 98-degree garage in summer raises real overheating concernA12. Weight gets you thinking about the move-in day; heat is the thing that matters every day after.
Your Life, Your Pick
Selected because: Whole-home and van-life loads are where the EcoFlow's larger bank actually shows up in practice
For Weekend Camping and Van Life Daily, the EcoFlow wins because it simply has more battery to draw from: at 4,685Wh needed for a full van-life day, the Ultra uses 30% of its bank while the Double Kit uses 55%. That's the difference between charging every other day and charging almost every day.
For the shorter draws, an 8-hour blackout, a CPAP overnight, a remote workday, a tailgate party, both systems have so much headroom that the winner is effectively a coin flip. Real owners with 2-battery Ultra setups confirm the big-load case holds up outside the spec sheet too, describing flicker-free power for a well pump, refrigerator, and central AC running togetherA9, and one owner running most of their house off two batteriesA14.
What the Specs Don't Tell You
Selected because: Surge ratio favors Jackery, UPS speed favors EcoFlow, and both are decision-relevant, not decorative
rated cycles
Two gotchas cut in opposite directions here. The Jackery's surge ratio (2.0x rated) beats the EcoFlow's (1.5x), which is the inverter-quality tell for anyone starting big compressor loads. The EcoFlow's 0ms switchover beats the Jackery's 20ms standby gap, which is the tell for anyone backing up something that can't tolerate even a brief interruption.
The weight gotcha is a plain warning, not a coin flip: 405.4 lbs is a lot of power station, and the Ultra's extra batteries are reported by an actual owner as a two-person liftA8. If this is going in and staying put, it's a non-issue. If it's coming back out of the garage more than once, factor it in before you buy.
Strengths & trade-offs
EcoFlow DELTA Pro Ultra + 2 Batteries
Strengths
- +Larger battery capacity
- +Longer warranty
Trade-offs
- –Substantially more expensive (+$1,900) than the Explorer 5000 Plus Double Kit.
- –Significantly heavier (+136.4 lbs), making it harder to move.
- –Weaker inverter (-7,200W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
Jackery Explorer 5000 Plus Double Kit
Strengths
- +Costs $1,900 less
- +Lighter by 136.4 lb
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
DELTA Pro Ultra + 2 Batteries
The Ultra uses just 13% of its bank for a full weekend; the Double Kit uses 25%. Both handle it easily, but the EcoFlow does it with roughly twice the headroom left over.
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
Both systems clear this with room to spare, using 10% and 19% of their respective capacity. Pick on price or weight here, not capability.
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 barely dents either system, 2% for the Ultra and 4% for the Double Kit. This is a case where the smaller, lighter, cheaper option is the obviously correct one.
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
A day of laptop and monitor use draws 6% from the Ultra and 11% from the Double Kit. Either lasts a work week between charges; break the tie on portability instead.
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 systems shrug this off at 4% and 8% of capacity. Buy whichever one you'd rather load into the truck.
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 + 2 Batteries
A full van-life day pulls 30% from the Ultra and 55% from the Double Kit, meaning the Jackery needs a mid-week recharge the EcoFlow can skip. For daily off-grid living, the extra bank size earns its keep.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA Pro Ultra + 2 Batteries runs 76.4h vs 41.8h.
$7,899 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 0–1044.5hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–208.9hHigh-Draw Appliances
These reveal the real limitsscale 0–15.7h¹ 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
July 15, 2026
Verdict: the EcoFlow DELTA Pro Ultra + 2 Batteries
If you're building a whole-home backup system you intend to own for a decade, the DELTA Pro Ultra + 2 Batteries wins on the math that actually compounds: $0.12 per lifetime kWh against $0.17, a 10-year warranty against 5, and instant 0ms switchover instead of a 20ms standby gap. But this is not a blowout. The Jackery Double Kit delivers double the continuous output (14,400W vs 7,200W), a better surge-to-rated ratio, an 8,000W solar ceiling, 4,000 rated cycles against 3,500, and it does all of that while weighing 136 pounds less and costing $1,000 less on day one. Buyers who need to run big simultaneous loads, or who value lighter hardware and a smaller check, should take the Jackery and not feel like they compromised.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 15, 2026. The links below open EcoFlow's and Jackery's current prices.
$7,899.00 list · direct from EcoFlow
or check the Explorer 5000 Plus Double Kit price$5,999.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 15, 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 Pro Ultra + 2 Batteries rates 4.1/5 (50th percentile of 17 Whole-Home / Off-Grid-class units), and Explorer 5000 Plus Double Kit rates 4.5/5 (69th percentile of 17 Whole-Home / Off-Grid-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
405.4 lbs against 269 lbs is a 136-pound gap, and the Ultra's extra batteries are heavy enough that an actual owner needed a second person to move them safely. Fine for a permanent install, a real consideration for anything you plan to relocate.
Surge Power: Inverter Quality Indicator
The Double Kit can burst to double its continuous rating (28,800W from a 14,400W base); the Ultra bursts to 1.5 times its own (10,800W from 7,200W). For starting compressor-heavy appliances, the Jackery's inverter has more proportional headroom.
UPS Speed: true uninterruptible (0ms) vs standby (<20ms)
The Ultra's 0ms switchover is a true uninterruptible transfer; the Double Kit's 20ms is fast standby switching, not instant. Most gear won't notice the 20ms gap, but equipment that truly can't tolerate any interruption should go with the EcoFlow.
Full record above — the Test Desk pick is the DELTA Pro Ultra + 2 Batteries.
Check DELTA Pro Ultra + 2 Batteries price →or check the Explorer 5000 Plus Double Kit 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 Explorer 5000 Plus Double Kit is cheaper to buy, but the DELTA Pro Ultra + 2 Batteries is cheaper to own. At $0.12/kWh over its lifetime vs $0.15/kWh, the DELTA Pro Ultra + 2 Batteries's higher cycle life and capacity make each dollar go further over the years.
Brand trust
EcoFlow
Ecosystem
EcoFlow runs the deepest ecosystem in the category, a dozen-plus models with a modular expansion path that scales well past what either unit here offers on its own.
Support
Support experiences are polarized: plenty of hassle-free prepaid-label replacements, but also reports of long waits and refurbished swaps. Buying through Costco or Amazon gives you a stronger safety net than going direct.
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. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The October 2025 DELTA Max 2000 recall over overheating risk is a different product line, but it's worth knowing EcoFlow has had a real safety recall recently, not just software complaints.
Jackery
Ecosystem
Jackery's Explorer and HomePower lineups cover a similarly broad range, with the widest retail footprint of any brand here, Costco, Home Depot, Best Buy, all carry it.
Support
Support is the brand's weak point: Reddit reports describe slow, scripted responses and strict receipt requirements for warranty claims. As with EcoFlow, buying through Costco or Amazon buys you a better return path than going direct.
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
Jackery's app is the roughest in the category, rated 2.3-3.3 out of 5 across platforms, with a mandatory login even when you're offline. It's worth testing before you rely on it during an actual blackout.
Analyst note
Both brands have real support gaps, so the safer move with either is buying through a big-box retailer for return leverage rather than direct. EcoFlow's ecosystem and community are bigger; Jackery's retail distribution and brand recognition are wider. Neither edge is decisive enough to override what the hardware itself tells you.
Growth path
DELTA Pro Ultra + 2 Batteries
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 18,432Wh.
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 5000 Plus Double Kit
EXPANDABLESupports Jackery expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 10,080Wh.
Accepts up to 8,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
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
Both expand, but the Explorer 5000 Plus Double Kit's higher solar ceiling (8,000W vs 5,600W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA Pro Ultra + 2 Batteries
Real owners running the two-battery Ultra configuration back up the whole-home-backup pitch: one describes central AC, a refrigerator, and a well pump running together without a flickerA9, another says the home panel shows no flicker at all and the system runs most of their houseA14, and a two-unit owner calls the scalability and self-heating/cooling behavior in temperature extremes matchlessA10. Adding the second battery is consistently described as the thing that eliminated runtime anxiety, with one owner reporting their runtime doubled after the upgradeA13.
The complaints cluster around software and support, not raw power delivery. One long-term forum owner reports getting pointed back to the same superficial web manual twice when asking support for helpA2, being told to put the unit in a 'faraday cage' after the inverter interfered with ham radio frequenciesA4, and getting no state-of-charge graph in the app despite asking support twiceA5. That same owner also documented the battery swinging from 90% down to 8% over a few idle daysA6, which a separate reviewer's measured ~60-hour full-drain-at-idle figureA7 makes less surprising than it sounds. None of this is enough to overturn what owners of the actual whole-home-backup configuration report about the hardware itself, but it's a real software and support gap worth going in knowing about.
“This means that without any grid or solar input, the system would fully drain its own 6kWh battery in about 60 hours. For off-grid use, this parasitic drain must be carefully factored into your energy budget.”
Jackery Explorer 5000 Plus Double Kit
No independent long-term owner reports exist yet for the paired Double Kit bundle specifically, so every entry here comes from reviews of the single Explorer 5000 Plus unit, the same hardware each half of the kit uses, and should be read as relevant but not verified for the two-unit configuration. With that honestly flagged: reviewers consistently praise the build quality, wheels, and handle on a unit this sizeB1B7B9, and both a professional reviewer and a customer separately describe the UPS/EPS switchover as seamless with no noticeable flickerB4B8.
The catch worth knowing before buying a Double Kit for whole-home backup: at least one reviewer flags that true automatic whole-home switching requires a separate Smart Transfer Switch that isn't included by default, meaning manual intervention during an outage unless you buy and install itB14. Idle power draw was measured as solid at roughly 58W with the inverter onB3, though some owners report faster standby drain when Wi-Fi and Bluetooth are left onB10.
“This thing has real wheels, a solid suitcase handle that is actually one of the sturdiest sliding handles we've ever seen on a power station.”
Sources
thesolarlab.com · jackery.com · poweraic.com · hobotech.tv · batteryskills.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
- Owners repeatedly report EcoFlow customer support gives dismissive or unhelpful answers to specific technical questions (manual gaps, RFI interference, app charting). [DELTA Pro Ultra + 2 Batteries · 3 entries]
- The unit's idle/parasitic self-consumption is a recurring theme, both as a documented SoC anomaly and as an acknowledged spec-level drain figure from a tester. [DELTA Pro Ultra + 2 Batteries · 2 entries]
- Multiple owners note the extra battery packs are extremely heavy (100+ lbs each), requiring two people, and one owner separately observed uneven heat between stacked batteries raising summer overheating concerns. [DELTA Pro Ultra + 2 Batteries · 3 entries]
- Real owners with 2-battery setups consistently praise seamless/flicker-free UPS switchover and confirm the system genuinely runs whole-home loads (AC, well pump, most of house). [DELTA Pro Ultra + 2 Batteries · 3 entries]
- Adding a second battery is described by owners as meaningfully extending real-world runtime for whole-home backup, matching expectations. [DELTA Pro Ultra + 2 Batteries · 2 entries]
- Reviewers consistently praise build quality, wheels/handle design, and quiet operation for a unit this size. [Explorer 5000 Plus Double Kit · 3 entries]
- UPS/EPS switchover is repeatedly reported as seamless/flawless with no noticeable flicker. [Explorer 5000 Plus Double Kit · 2 entries]
- Some owners note standby/idle drain concerns tied to leaving Wi-Fi/Bluetooth on, though measured idle draw was called 'solid' by one professional reviewer. [Explorer 5000 Plus Double Kit · 2 entries]
- Reviewers flag that true whole-home seamless backup requires the separate Smart Transfer Switch, which isn't automatic/included by default and adds cost/complexity. [Explorer 5000 Plus Double Kit · 1 entries]
- A2
“No real manual. All they have is the web user guide which is superficial if I'm being generous. I asked support about it and they pointed me at the web guide I was complaining about. Twice.”
DIY Solar Power Forum — 'Ecoflow Delta Pro Ultra issues' thread · 2024-02 · [negative]
- A4
“I contacted EcoFlow support and they told me I could put it in a 'faraday cage'.”
DIY Solar Power Forum — 'Ecoflow Delta Pro Ultra issues' thread · 2024-02 · [negative]
- A5
“No State of Charge graph in the app... I contacted support and twice they told me to go to the app screen with the charts, which only has input and output.”
DIY Solar Power Forum — 'Ecoflow Delta Pro Ultra issues' thread · 2024-02 · [negative]
- A6
“After a few days of using it overnight and letting it charge back up to '90%', it'd go from '90%' down to '8%'.”
DIY Solar Power Forum — 'Ecoflow Delta Pro Ultra issues' thread · 2024-02 · [negative]
- A7
“This means that without any grid or solar input, the system would fully drain its own 6kWh battery in about 60 hours. For off-grid use, this parasitic drain must be carefully factored into your energy budget.”
Battery Skills — 'EF ECOFLOW DELTA Pro Ultra + Extra Battery Review' · 2025-10 · [mixed]
- A8
“The main inverter is a manageable 71 lbs, but each Ultra Smart Extra Battery is a dense 115 lbs, requiring two people for safe movement.”
Battery Skills — 'EF ECOFLOW DELTA Pro Ultra + Extra Battery Review' · 2025-10 · [mixed]
- A9
“We powered a central air conditioner, refrigerator, and well pump simultaneously without a flicker.”
Battery Skills — 'EF ECOFLOW DELTA Pro Ultra + Extra Battery Review' · 2025-10 · [positive]
- A10
“I own two Delta Pro Ultra's with two batteries each... We have experienced matchless performance, scalability, flexibility. It cools/heats itself in temperature extremes-simply awesome!”
Walmart customer reviews — 'EF EcoFlow Extra Battery for DELTA Pro Ultra' · unknown · [positive]
- A11
“I noticed the battery closest to the inverter seems to run hotter than the one below. About 10 degrees warmer. I switched the batteries around to ensure that it wasn't the battery and got the same results.”
Walmart customer reviews — 'EF EcoFlow Extra Battery for DELTA Pro Ultra' · unknown · [negative]
- A12
“My garage could get up to 98 degrees during the summer, that means my batteries can overheat.”
Walmart customer reviews — 'EF EcoFlow Extra Battery for DELTA Pro Ultra' · unknown · [negative]
- A13
“I originally bought my Delta Pro Ultra with the single battery, worked great is able to power my entire home for about 4 to 5 hours during peak times... I bought a second battery... My run time has doubled eliminating the anxiety.”
Walmart customer reviews — 'EF EcoFlow Extra Battery for DELTA Pro Ultra' · unknown · [positive]
- A14
“With the home panel, there is no flicker when the power changes. I bought a unit with 2 batteries and it runs my most of my house.”
Walmart customer reviews — 'EF EcoFlow Extra Battery for DELTA Pro Ultra' · unknown · [positive]
- B1
“This thing has real wheels, a solid suitcase handle that is actually one of the sturdiest sliding handles we've ever seen on a power station.”
thesolarlab.com — Jackery Explorer 5000 Plus Review: Worth Buying? · unknown · [positive]
- B3
“The idle power draw was also solid, sitting around 58W per hour when we turned the inverter on and let it run through a full charge without any sort of load”
thesolarlab.com — Jackery Explorer 5000 Plus Review: Worth Buying? · unknown · [positive]
- B4
“The (Uninterrupted Power Supply) UPS mode also worked seamlessly, so you can set it up in a way that will allow outages to go mostly unnoticed.”
thesolarlab.com — Jackery Explorer 5000 Plus Review: Worth Buying? · unknown · [positive]
- B7
“The Explorer, although quite heavy, moves easily given the wheels and handle.”
jackery.com product page — customer review on Explorer 5000 Plus listing · unknown · [positive]
- B8
“Tested UPS mode and power switch was quick! ... Tested regular backup and UPS mode. Both worked flawless.”
jackery.com product page — customer review re: STS installation · unknown · [positive]
- B9
“Very well built… very little noise, great power, solidly built.”
poweraic.com — Jackery Explorer 5000 Plus Solar Generator review of 2025 · 2025-07 · [positive]
- B10
“Some report slow sapping when Wi‑Fi and Bluetooth stay on.”
poweraic.com — Jackery Explorer 5000 Plus Solar Generator review of 2025 · 2025-07 · [negative]
- B14
“No Automatic Transfer Switch Included ... requiring manual intervention to switch power during an outage.”
batteryskills.com — Jackery Explorer 5000 Plus 5000Wh Review · 2025-10 · [negative]
Research compiled July 15, 2026.
Who Should Buy Which
Buy the DELTA Pro Ultra + 2 Batteries if you…
- →You're wiring a permanent whole-home backup system into a garage or utility closet and won't be moving it once it's installed.
- →You want the lowest cost per kilowatt-hour over a decade of ownership and can absorb the extra $1,000 upfront.
- →You're backing up something that genuinely can't tolerate a switchover gap and want the longer 10-year warranty as insurance.
Buy the Explorer 5000 Plus Double Kit if you…
- →You need to run large loads simultaneously and want the extra continuous wattage and surge headroom in reserve.
- →You'll actually move this system between a garage, an RV, and a campsite, and 136 fewer pounds matters every time you do.
- →You want $1,000 back in your pocket today and don't need the last cent of lifetime cost-per-kWh optimization.
If neither fits
If your actual need is a weekend cooler-sized station for tailgates and short camping trips, both of these are absurd overkill. Look at something in the 1,000-2,000Wh class instead; you'll use single digits of either system's capacity and pay five figures less.
The Bottom Line
The DELTA Pro Ultra + 2 Batteries wins this matchup on the number that compounds over a decade: twelve cents a lifetime kilowatt-hour against seventeen, backed by a warranty that runs twice as long and a switchover that never blinks. That's the case for spending the extra $1,000.
It's not a clean sweep. The Jackery Double Kit answers with double the continuous output, a better surge ratio, and 136 fewer pounds to deal with every time the system moves. If your household needs raw power and portability more than it needs the lowest possible cost per kilowatt-hour, take the Jackery and keep the $1,000.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA Pro Ultra + 2 Batteries worth $1,000 more than the Jackery Double Kit?
If you're keeping it for years, yes on the math: it costs $0.12 per lifetime kWh against $0.17 for the Jackery, and carries a 10-year warranty against 5. If you need maximum continuous output or lighter hardware right now, the $1,000 saved on the Jackery buys real capability elsewhere, not a downgrade.
Can either system run a central air conditioner and a refrigerator at the same time?
Owners of the EcoFlow's two-battery configuration report running a central AC, refrigerator, and well pump together without a flicker. The Jackery's Double Kit has double the continuous wattage and a better surge ratio on paper, though no owner reports of the paired bundle running that exact load combination were found yet.
How much heavier is the DELTA Pro Ultra + 2 Batteries than the Jackery Double Kit?
136.4 pounds heavier: 405.4 lbs against 269 lbs. The extra weight sits mostly in the battery packs, which one owner reports needing two people to move safely, so this is a system you install once rather than one you relocate often.
Does the Jackery Explorer 5000 Plus Double Kit include automatic whole-home switching?
Not by default. At least one reviewer notes that true automatic transfer requires a separate Smart Transfer Switch, and without it, switching power during an outage needs manual intervention. Factor that into the total cost if whole-home automatic backup is the point of buying it.
Which one switches to battery power faster during an outage?
The EcoFlow switches in 0ms, a true uninterruptible transfer, while the Jackery switches in about 20ms, a fast but not instant standby gap. Most electronics ride through 20ms without issue, so this mainly matters for equipment that can't tolerate any interruption at all.
Related comparisons
Where to buy
EcoFlow DELTA Pro Ultra + 2 BatteriesPick
$7,899.00
$7,899.00 list · direct from EcoFlow
Jackery Explorer 5000 Plus Double Kit
$5,999.00
$5,999.00 list · direct from Jackery
Prices may vary by retailer and are subject to change.