Head-to-head test
EcoFlow DELTA 3 Plus vs BLUETTI AC70
The DELTA 3 Plus runs a 1,500W space heater and refills from the sun twice as fast; the AC70 does neither, but costs $370 less — so it comes down to whether your loads ever climb past 1,000 watts.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Plus
3,225Power Score · Appliance Class
$689.00 list · direct from EcoFlow
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BLUETTI
AC70
2,727Power Score · Appliance Class
$359.00 list · direct from BLUETTI
Spec deltas
The DELTA 3 Plus outputs 1,800W to the AC70's 1000W, and that number decides most of this matchup. It means the DELTA starts a 1,500W space heater with headroom to spare while the AC70's inverter simply refuses. Add 1,024Wh of battery against 768Wh and 1,000W of solar against 500W, and the DELTA is the bigger, faster, more capable unit.
The AC70's answer is the price tag: $329 against $699. That $370 gap is real money, and it buys a unit that is lighter, cheaper to own per year, and cheaper per lifetime kilowatt-hour. If your power needs are modest — phones, laptops, a fan, some lights — the AC70 covers them for roughly half the cost.
There is also a wrinkle in the DELTA's quiet-unit reputation worth reading before you pay for it. On paper it's rated 30dB to the AC70's 45; in the field, its fans behave in a way that undercuts that number. More on that below. Overall the DELTA wins on raw capability, but the AC70 makes a strong value case for the buyer whose loads stay small.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
That combination is exactly what a multi-day outage demands: 1,800W starts a space heater or a full-size microwave, and 1,000W of solar puts 1,024Wh back in a single good afternoon while the unit is still running loads. The AC70 can neither start the heater nor refill that fast.
DELTA 3 Plus: 1,800W output, 1,000W solarAC70: 1000W output, 500W solar
Why it mattersOff-grid campers and anyone who wants to run real appliances during an outage should pay the DELTA premium.
For a CPAP or a bedside desktop, a predictable fan beats a lower-rated one that surprises you at 2 a.m. The AC70's fan is silent when you're sipping power and only ramps when you push itB1; the DELTA's may spin up when you least expect it, and reviewers flag an overheating risk on heavy loads because of itA2.
DELTA 3 Plus: rated 30dB but fans cycle erratically even at low loadA1A2AC70: 45dB under load but quiet and predictable at light loadB1
Why it mattersBuyers chasing a silent bedside unit shouldn't take the DELTA's 30dB rating at face value.
The DELTA's 4,000-cycle rating against the AC70's 3,000 sounds like it closes the gap, but both are measured in decades of normal use — you will replace either for reasons other than a worn-out battery long before the cycles run out. The extra cycles are headroom you'll never reach.
AC70: $329, $0.14 per lifetime kWh, $66 per warranty yearDELTA 3 Plus: $699, $0.17 per lifetime kWh, $140 per warranty year
Why it mattersIf your loads stay under 1,000W, the AC70 is the value pick and the cycle-life gap shouldn't sway you.
The specific dimensions that decide these two units — everything else is a tie.
PowerScore Breakdown
Selected because: DELTA wins the composite meaningfully; frame the output-and-solar gap
overall power score
The DELTA posts 3,216 to the AC70's 2,815, and unlike some matchups this gap is earned. It comes from output and solar: 1,800W against 1000W, and 1,000W of solar input against 500W. Those aren't cosmetic — they change what the unit can physically do and how fast it comes back to life.
The AC70 isn't outclassed on the basics; it's simply a smaller unit built to a lower price. The score gap is the price gap wearing a different outfit.
Your Life, Your Pick
Selected because: output ceiling decides which real loads each can run
The output ceiling is the scenario story. The DELTA's 1,800W starts and runs a space heater, a full-size microwave, or a power tool; the AC70's 1000W caps you at the lighter half of the appliance drawer. That's why the DELTA takes the higher-draw scenarios below outright.
But note where both fall short: a weekend camp, an 8-hour blackout for a fridge-plus-essentials, and a van-life daily cycle all outrun both units' batteries. Neither is a whole-home solution. The DELTA wins the scenarios that are about starting a big load, not the ones that are about surviving for days.
What the Specs Don't Tell You
Selected because: the DELTA's fan behavior and the cycle-life gotcha both need honest handling
rated cycles
The DELTA's fan is the gotcha that matters. Its 30dB rating is real at a bench, but reviewers consistently report the fans running even at low load and cycling erratically, which both undercuts the quiet-UPS marketing and raises an overheating risk under heavy loadsA1A2. There's a plausible fix — the same reviewers note EcoFlow has patched fan behavior on other units via firmware — but you'd be buying on a promiseA4.
The cycle-life gotcha cuts the other way but lands soft. The DELTA's 4,000 cycles against the AC70's 3,000 is a genuine spec difference that translates to no practical difference: both are decades of ordinary use. Don't pay extra for cycles you will never reach.
Lifetime Value
Selected because: AC70's $370 lower price is the whole counter-argument
cost / lifetime kWh
This is the AC70's section. At $329 it costs $370 less than the DELTA, and it's cheaper on both ownership measures — $0.14 per lifetime kilowatt-hour against $0.17, and $66 per warranty year against $140. For a buyer whose loads never test the DELTA's extra output, that's a lot of money for capability you won't use.
The DELTA earns its price only if you cash in what it's selling: the output to run heavy loads and the solar to refill fast. Buy it for those and it's fair value. Buy it for phones and a laptop and you've overpaid for an inverter you'll never lean on.
Strengths & trade-offs
EcoFlow DELTA 3 Plus
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$330) than the AC70.
BLUETTI AC70
Strengths
- +Costs $330 less
- +Lighter by 4.5 lb
Trade-offs
- –Weaker inverter (-800W) limits appliance compatibility.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the DELTA 3 Plus's 4,000, so it wears out sooner.
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 can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
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
Neither unit
Neither unit can fully handle this scenario (needs 1,645Wh). You'd need a higher-capacity station or to cut back on usage.
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
DELTA 3 Plus
A CPAP needs about 320Wh a night, and both units clear it comfortably — the DELTA on capacity, the AC70 with room to spare. The DELTA has more battery in reserve, so it takes the scenario on paper, but read the fan note before you assume it's the quieter bedside choice. On pure headroom, the DELTA.
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
Neither unit
Neither unit can fully handle this scenario (needs 910Wh). You'd need a higher-capacity station or to cut back on usage.
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 3 Plus
A tailgate's mixed load runs about 670Wh, right at the edge of the AC70's usable 768Wh but easy for the DELTA's 1,024Wh. If someone brings a hot plate or a blender, the DELTA's 1,800W output handles it while the AC70 stalls — the DELTA keeps the tailgate running.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
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 3 Plus runs 4.2h vs 3.2h.
$689 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 0–58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–11.6hHigh-Draw Appliances
These reveal the real limitsscale 0–0.9h¹ 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 16, 2026
Verdict: the DELTA 3 Plus, on Power Score margin
The DELTA 3 Plus is the more capable machine by a clear margin: 1,800W of continuous output against the AC70's 1000W, 1,024Wh against 768Wh, and 1,000W of solar input against 500W. It starts and runs heavy household loads the AC70 can't touch, and it refills from panels in a single sunny stretch. For anyone who wants a unit that runs appliances and recharges fast off-grid, it earns its $699. The honest counterweight: the AC70 costs $370 less, is lighter, and is cheaper both per warranty year and per lifetime kilowatt-hour — the value math favors it. And the DELTA's headline quiet rating comes with an asterisk its fans keep writing. If your loads stay under 1,000W, the AC70 is the smart-money pick; if they don't, the DELTA is worth the premium.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 16, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$689.00 list · direct from EcoFlow
or check the AC70 price$359.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 16, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Home Backup, Food Truck.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 3 Plus rates 4.4/5 (65th percentile of 24 Everyday-class units), and AC70 rates 4.8/5 (89th percentile of 19 Compact-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 30dB rating has an asterisk
On paper the DELTA 3 Plus is rated 30dB to the AC70's 45 — a real gap at idle. In practice both spin up under load, and the DELTA's fan behavior is the one reviewers flag. Judge this by the field reports below, not the sticker number.
UPS Speed: line-interactive (<10ms) vs standby (<20ms)
The DELTA 3 Plus switches to battery in 10ms (line-interactive (<10ms)), while the AC70 takes 20ms (standby (<20ms)). Safe for desktop PCs, routers, and CPAP machines. NAS drives are protected. This matters if you're using it as a home UPS for always-on equipment.
Warranty Value Comparison
The AC70 gives you 13.9 years of warranty per $1,000 spent, vs the DELTA 3 Plus's 7.3 years. That's 1.9× more coverage per dollar. An underrated factor if you're keeping this unit for years.
4,000 vs 3,000 cycles you'll never reach
The DELTA is rated for 4,000 charge cycles against the AC70's 3,000. Both translate to decades of ordinary use, so you'll replace either for newer features long before the cells wear out. This is a spec-sheet win, not a real-world one — don't pay extra for it.
Full record above — the Test Desk pick is the DELTA 3 Plus.
Check DELTA 3 Plus price →or check the AC70 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 $0.16/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
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. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
EcoFlow makes the fastest-charging stations in the category and the deepest ecosystem, and it has a track record of patching quirks like fan behavior through firmware. Support is polarized, so a retailer with its own return window is a useful backstop.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship (Apex 300, 3072Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. Full LFP standardization across lineup (3,500-6,000+ cycles). Dual-voltage (120V/240V) in flagships.
Worth knowing
BLUETTI's edge is capacity-per-dollar, and the AC70 is a clean example. The risk is support — email-heavy with timezone delays and uneven outcomes — and buying direct tends to go smoother than through third parties.
Analyst note
EcoFlow sells more capability and a fix-it-in-firmware culture; BLUETTI sells value and predictability. Neither has support you'd call a strength, so buy the one whose hardware fits your loads and keep your receipt.
Growth path
DELTA 3 Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
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.
AC70
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 768Wh.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the DELTA 3 Plus's higher solar ceiling (1,000W vs 500W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Plus
The DELTA 3 Plus draws praise for the things its size implies: very fast recharge times and a seamless sub-10ms UPS switchover that keeps devices running through an outageA3. On raw performance, reviewers like it.
The recurring knock is the fan. Marketed as near-silent, the DELTA's fans reportedly activate even under low loads and cycle on and off erratically, which limits it as a quiet UPS and — because the cooling isn't behaving — raises the risk of overheating under heavy loadsA1A2. Reviewers expect EcoFlow could resolve it in a firmware update, as it has for other stations, but at purchase it's a known quirk rather than a fixed oneA4.
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
Sources
thesolarlab.com
BLUETTI AC70
The AC70's fan does the boring, expected thing, and that's a compliment: quiet when you're sipping power, audibly present when you push it toward its output ceiling, and never a mysteryB1. Against a rival whose fans surprise people, predictable is a feature. Charging is the other strength — Turbo mode refills it in under an hour, with clean pass-through so it runs gear while chargingB2.
The broader record is the value story: around 22 pounds, easy to carry, and enough battery to power devices for a day or more, widely rated a strong budget pickB4. The 5-year warranty — 3 standard plus 2 bought direct — came through testing with no issues reportedB3.
“Under light loads the fan is quiet, but push past heavier output and it ramps up to a noticeable but not obnoxious level — comparable to an old laptop or gaming PC under load.”
Sources
backuppowerhub.com · root-nation.com · phonearena.com · trustedreviews.com · myoutdoorbasecamp.com · thedigitalstory.com · kenrockwell.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
- The DELTA 3 Plus's headline weakness is fan behavior — fans run even at low load and cycle erratically, undercutting its quiet-UPS marketing. [DELTA 3 Plus · 3 entries]
- Fast charging, compact portability, and strong value are the consistent praise; fan noise rises under heavier load but isn't considered intrusive. [AC70 · 2 entries]
- A1
“Marketed as near-silent, but real-world fan performance is a significant flaw: the fans activate even under low loads and cycle on and off erratically, which limits its effectiveness as a quiet UPS.”
T3 — EcoFlow DELTA 3 Plus review: Lightning-fast charging with a noisy flaw; thesolarlab.com — DELTA 3 Plus Review · 2026 · [negative]
- A2
“Part of why it stays quiet is that the internal fans aren't always doing their job properly — the erratic cycling raises the risk of the unit overheating when running heavy loads.”
thesolarlab.com — EcoFlow DELTA 3 Plus Review: Amazing, but One Big Quirk? · 2026 · [negative]
- A3
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
T3 / thesolarlab.com — DELTA 3 Plus reviews · 2026 · [positive]
- A4
“Reviewers note EcoFlow should be able to resolve the fan behavior with a software update, as it has done for other power stations after release.”
thesolarlab.com — DELTA 3 Plus Review · 2026 (dated claim — may be partially addressed by firmware) · [mixed]
- B1
“Under light loads the fan is quiet, but push past heavier output and it ramps up to a noticeable but not obnoxious level — comparable to an old laptop or gaming PC under load.”
backuppowerhub.com / root-nation.com — BLUETTI AC70 review · 2025-2026 · [mixed]
- B2
“Fast AC charging via Turbo mode refuels it in under an hour, and pass-through charging works smoothly — you can charge via AC, solar, or car while simultaneously powering devices.”
phonearena.com / trustedreviews.com — AC70 review · 2025-2026 · [positive]
- B3
“No issues reported during testing; backed by a 3-year standard warranty plus an automatic 2-year extension when purchased from BLUETTI's official site, for up to 5 years total.”
backuppowerhub.com / myoutdoorbasecamp.com — AC70 review · 2025-2026 · [positive]
- B4
“A compact ~22-lb unit — small enough to carry around but big enough to power devices for a day or more; widely regarded as a strong budget power station.”
thedigitalstory.com / kenrockwell.com — AC70 review · 2024-2026 · [positive]
Research compiled July 16, 2026.
Who Should Buy Which
Buy the DELTA 3 Plus if you…
- →The off-grid camper or outage-prepper who needs to run a space heater, a full-size microwave, or a power tool — the 1,800W output is the whole reason to be here.
- →The buyer with panels who wants fast solar recharge; 1,000W of input refills the DELTA in a single good afternoon while it's still running loads.
- →Anyone who'll actually use the extra output and can look past a fan that reviewers say needs a firmware fixA1.
Buy the AC70 if you…
- →The modest-load buyer — phones, laptops, a fan, lights, a CPAP — who wants those covered for $370 less.
- →The value shopper who cares about cost per year and per kilowatt-hour, both of which favor the AC70.
- →The bedside user who'd rather have a predictable fan than a lower rating with erratic behaviorB1.
If neither fits
If you're powering a home through a multi-day outage, both tap out — a weekend camp and an 8-hour fridge-and-essentials blackout already outrun both batteries. Look at a 2,000Wh-plus unit with expansion, like a DELTA Pro or an AC200-class station, instead of stretching either of these.
The Bottom Line
The DELTA 3 Plus wins on capability, and the win is real: 1,800W of output starts a space heater the AC70's 1000W can't, and 1,000W of solar refills it in half the time. For the buyer who runs appliances or lives off panels, that's worth the $699.
But the AC70 is the value pick, and honestly so — $370 cheaper, lighter, and cheaper to own by every measure, with a fan that behaves predictably where the DELTA's reportedly does notB1A1. If your loads stay under 1,000W, buy the AC70 and pocket the difference. If they climb past it, the DELTA is the one that actually does the job.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the AC70 run a space heater like the DELTA 3 Plus can?
No. A typical space heater draws about 1,500W, which sits above the AC70's 1000W output ceiling, so it won't start. The DELTA 3 Plus outputs 1,800W and runs one with headroom — if heating is on your list, that's the deciding spec.
Is the DELTA 3 Plus really as quiet as its 30dB rating suggests?
Not reliably. Reviewers report the fans run even at low load and cycle on and off erratically, which undercuts the quiet-UPS marketing and can raise overheating risk under heavy loads. EcoFlow may fix it in firmware as it has on other units, but at purchase it's an open issue.
Which is cheaper to own over time?
The AC70. It costs $370 less up front, and works out cheaper per lifetime kilowatt-hour ($0.14 vs $0.17) and per warranty year ($66 vs $140). The DELTA's longer cycle life is real but unreachable in normal use, so it doesn't close the gap.
How much faster does the DELTA recharge from solar?
About twice as fast. It accepts 1,000W of solar against the AC70's 500W, so it can put its full 1,024Wh back in a single sunny afternoon while still powering loads. For off-grid use that recharge speed is a survival spec, not a convenience.
Is the DELTA 3 Plus worth twice the price of the AC70?
Only if you use what it's selling. The extra output runs heavy appliances and the extra solar refills fast — cash those in and it's fair value. If your loads are phones and a laptop, you'd be paying $370 for an inverter you never lean on, and the AC70 is the smarter buy.
Where to buy
EcoFlow DELTA 3 PlusPick
$689.00
$689.00 list · direct from EcoFlow
BLUETTI AC70
$359.00
$359.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.