Head-to-head test
EcoFlow DELTA 3800 Gen4 vs BLUETTI Apex 300The Apex 300 Gets You Through Tonight. What About Tomorrow?
After a night without power, the EcoFlow still has more than twice the Apex 300's reserve, and both take extra batteries. I'd pay the difference for the DELTA 4 (3800), unless one night of backup is all you plan for.
Black Friday · 23 days out
Price to beat:Apex 300 $1,499
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3800 Gen4 → · BLUETTI Apex 300 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
Run both through our 8-hour blackout and look at what's left.
The DELTA 4 (3800) finishes with 1,554 Wh still usable, nearly enough to do the night again. BLUETTI's Apex 300 finishes with 705 Wh, less than half a second night. Behind those numbers are batteries of 3,763 Wh and 2,764.8 Wh.
You pay for that reserve, but not by the watt-hour.
EcoFlow lists the DELTA 4 (3800) at $2,199. The Apex 300 sells for $1,699. Divide each by its battery and they come out about level per watt-hour, so the $500 buys battery rather than a logo.
Everything else is close, and the weight goes the EcoFlow's way.
The DELTA 4 (3800) weighs 67.5 lb to the Apex's 83.78 lb, and both take extra batteries. The Apex keeps 240 W more inverter, 3,840 W against 3,600 W, and 400 W more solar input.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
A storm outage doesn't promise to end by breakfast. On the DELTA 4 the second evening is mostly paid for before anything recharges it. On the Apex the second evening depends on sun or a generator that afternoon. When the grid comes back, EcoFlow rates the DELTA 4 to refill at up to 1,800 WA4.
8-Hour Blackout needs 1,645 WhAfter it: 1,554 Wh usable left on the DELTA 4 (3800), 705 Wh on the Apex 300DELTA 4 (3800): wall charging up to 1,800 WA4
Why it mattersIf your outages tend to run past one night, that reserve is the reason to pay more.
Capacity
So the gap is not a premium for the name. It's about a third more battery at roughly the same rate, on cells rated for the same 6,000 cycles. If you'd use the extra, it's fairly priced. If one night is all you'll ever cover, the Apex keeps $500 in your pocket and the extra battery would sit idle.
DELTA 4 (3800): 3,763 Wh at $2,199Apex 300: 2,764.8 Wh at $1,699Both rated for 6,000 cycles
Why it mattersDecide how many nights you're covering, then let that pick the box.
continuous output
240 W won't change what runs together. A fridge, a furnace blower, a router and lights fit inside either with room left. The solar gap shows only once you own more than 2,000 W of panels. For a fridge compressor or a sump pump, the published 7,200 W surge is the spec I'd check.
Apex 300: 3,840 W continuous; BLUETTI publishes no surge figureDELTA 4 (3800): 3,600 W continuous, 7,200 W surgeA2Solar input: 2,400 W against 2,000 W across two 1,000 W inputsA5
Why it mattersUnless you own more than 2,000 W of panels, the Apex's power edges won't show up in your house.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Three rows go to the DELTA 4 (3800) on reserve, two go to both, and Van Life Daily goes to neither.
Three rows go to the DELTA 4 (3800) on reserve alone. Weekend Camping ends with 1,099 Wh spare against 250 Wh, and on the Apex one cold night or an extra device eats that. The blackout and the remote workday tell the same story at larger margins. CPAP and the tailgate go to both, since neither load dents either battery.
Van Life Daily goes to neither. It needs 4,685 Wh. The DELTA 4 comes up 1,486 Wh short and the Apex 2,335 Wh short, so plan an extra battery whichever one you pick.
Portability & Form Factor
Selected because: 67.5 lb against 83.78 lb, and the lighter box holds the bigger battery.
weight
Both are two-handed lifts, and one is 16 lb kinder. The DELTA 4 (3800) is 67.5 lb with a handle at each end, and EcoFlow sells a folding cart for it separatelyA7. The Apex 300 is 83.78 lb. One reviewer calls it manageable thanks to its handlesB6, and another couldn't lift it onto a tableB8.
The extra weight isn't battery. The lighter box carries the bigger one. I'd roll the DELTA 4 out to a cabin on its cart. The Apex I'd set down once beside the breaker panel and leave it there.
What the Specs Don't Tell You
Selected because: 3,840 W against 3,600 W of output and 2,400 W against 2,000 W of solar; only EcoFlow publishes a surge figure.
240 W of extra inverter won't change your evening. The Apex 300 runs 3,840 W against 3,600 W. EcoFlow publishes a 7,200 W surge for the moment a motor startsA2, and BLUETTI publishes no surge figure. For a fridge compressor or a sump pump, the published spike is the number I'd trust.
The DELTA 4's wall charging can take a whole circuit. EcoFlow rates it at up to 1,800 WA4. At 120 V that's 15 A, the full rating of a 15 A circuitA4, so on a circuit shared with a microwave I'd turn the rate down in the EcoFlow app. On solar, the Apex takes 2,400 W against two 1,000 W inputs at 11 to 60 VA5, a margin you only see with more than 2,000 W of panels.
Growth Path
Selected because: Both take extra batteries, so where each one starts matters more than the port.
solar input
Both grow, so judge where each one starts. The DELTA 4 (3800) takes up to two of EcoFlow's DELTA 3 Max Plus or DELTA Pro 3 extra batteries through an adapter, and EcoFlow quotes 4 to 12 kWh in allA6. The Apex 300 takes BLUETTI's expansion batteries. Our record gives no ceiling for it, so I won't guess one.
EcoFlow already sells the pairing I'd buy. Its kit with a DELTA 3 Max Plus extra battery comes to 6 kWh in all by EcoFlow's figureA10. On the BLUETTI side, linking whole Apex 300s takes a Hub A1 parallel box one reviewer puts at around $699B12. For a fridge, a furnace blower and lights, one base unit and one extra battery is the realistic plan on either side.
In the makers’ pictures
What you’d actually be living with
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3800 Gen4
Front panel
- 1USB-C · 140 WOutUp to 140 W (USB-PD up to 28 V at 5 A). The port for a laptop.
- 22× USB-C · 65 WOutUp to 65 W each. EcoFlow says these two and the USB-A share 16 W when two or more are in use at once.
- 3USB-A · 36 WOutUp to 36 W (5, 9 or 12 V at 3 A).
- 430 A twist-lockOutA three-slot twist-lock marked 30A MAX, rated 30 A at 120 V on the US unit.
- 54× 20 A outletsOutFour T-slot 120 V outlets rated 20 A each, sharing 3,600 W continuous and a 7,200 W surge.
Photo: EcoFlow · Product image, EcoFlow Japan store · numbers and labels are ours. Ratings from EcoFlow’s US spec table; outlet shapes read by us from EcoFlow’s picture, taken of the Japanese unit, which shares the US panel.
Input side
- 12× Solar/DC in · 1,000 WInTwo inputs, each 11 to 60 V, up to 20 A, 1,000 W: 2,000 W of panels in all.
- 2AC in · 1,800 WIn100–120 V at 15 A. Charges at up to 1,800 W, which at 120 V is the whole of an ordinary 15 A circuit.
- 3Battery portIn · OutTakes up to two of EcoFlow’s DELTA 3 Max Plus or DELTA Pro 3 extra batteries; EcoFlow quotes 4–12 kWh.
Photo: EcoFlow · Product image, EcoFlow Japan store · numbers and labels are ours. Ratings from EcoFlow’s US spec table and the panel’s own printing.
BLUETTI Apex 300
Front panel
- 1120 V / 240 V switchOutSwitches the AC output between 120 V and 240 V. BLUETTI’s manual says switching cuts the AC output.
- 2Charging-mode switchInPrinted Silent, Auto and Turbo. By BLUETTI’s manual, Turbo charges at up to 3,840 W from AC and Silent at up to 500 W.
- 34× 20 A outletsOutFour 120 V NEMA 5-20R outlets, each printed 20A Max., sharing the 3,840 W printed above them. With the switch on 240 V, BLUETTI’s manual limits each to 16 A and each pair to 1,920 W (printed over each pair).
The 240 V, RV and P050A outlets and the AC inlet are on the left side; the solar inputs and the battery port on the right. No USB or 12 V ports: those need BLUETTI’s separately sold Hub D1.
Photo: BLUETTI · Product image, BLUETTI store · numbers and labels are ours. Ratings printed on BLUETTI’s panel; outlet types and limits from BLUETTI’s US Apex 300 manual.
Left side (AC)
- 1AC in · 1,800 WInPrinted 120V/15A Max. BLUETTI’s manual rates it 1,800 W, charging and pass-through together.
- 2P050A in/out · 50 AIn · OutPrinted AC IN/OUT Port 120V/240V 50A Max. By BLUETTI’s manual it charges from a TT-30 or L14-50 source through BLUETTI’s P050A cables, up to 6,000 W at 120 V or 12,000 W at 240 V with pass-through. As an output it needs BLUETTI’s Hub A1.
- 3TT-30R RV outlet · 30 AOutPrinted AC OUTPUT 120V/30A Max.: a camper’s 30 A shore-power cord plugs straight in. Up to 3,600 W by BLUETTI’s manual, or 16 A with the switch on 240 V.
- 4NEMA 14-50R · 240 VOutPrinted AC OUTPUT 120V/240V 50A Max. By BLUETTI’s manual it gives up to 3,840 W from the battery (16 A at 240 V), and 50 A when passing grid power through.
Also on this side: a grounding terminal and a reset button printed Circuit Protector 125VAC/20A. The outlets sit behind covers in BLUETTI’s picture.
Photo: BLUETTI · Product image, BLUETTI store · numbers and labels are ours. Ratings printed on BLUETTI’s panel; outlet types and limits from BLUETTI’s US Apex 300 manual and its numbered diagram on BLUETTI’s store page.
Right side (solar and battery)
- 12× Solar/DC in · 1,200 WInPrinted 12-60V/20A/1200W Max.×2: two XT60 inputs behind one cover, 2,400 W in all. BLUETTI’s manual says the full 2,400 W needs Turbo mode, and a car socket gives 96 W at 12 V or 192 W at 24 V.
- 2Battery portIn · OutPrinted Battery Expansion Port/51.2V. BLUETTI’s manual says it takes up to six B300K batteries, 19,353.6 Wh in all.
Both ports sit behind covers in BLUETTI’s picture.
Photo: BLUETTI · Product image, BLUETTI store · numbers and labels are ours. Ratings printed on BLUETTI’s panel; connector type, charging modes and battery count from BLUETTI’s US Apex 300 manual.
Strengths & trade-offs
EcoFlow DELTA 3800 Gen4
Strengths
- +Lighter by 16.3 lb
- +Larger battery capacity
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI Apex 300
Strengths
- +Costs $500 less
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Significantly heavier (+16.3 lbs), making it harder to move.
- –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 3800 Gen4
Both make it through, but the DELTA 4 (3800) ends with 1,099 Wh spare and the Apex 300 with 250 Wh. One cold night eats that on the Apex.
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 3800 Gen4
Both finish the night. The DELTA 4 (3800) has 1,554 Wh left, nearly a second night. The Apex 300 has 705 Wh, less than half of one.
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 3800 Gen4
A CPAP is about 40W for eight hours, so both of these cover the night several times over — capacity isn't the question here. What separates them is the box next to your pillow, and here the two ratings do settle it: the DELTA 3800 Gen4's 40dB is EcoFlow's maximum under heavy charge and discharge, while the Apex 300's 45dB is its maker's best case. A ceiling below the other unit's floor holds whichever way you read the two conventions, so the DELTA 3800 Gen4 is the quieter of the two. Neither figure is a reading at a 40W draw, though, so that tells you which is quieter, not how quiet either is beside a bed — look for hands-on reports before either one goes next to a pillow.
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 3800 Gen4
Both finish the day. The DELTA 4 (3800) still banks 2,289 Wh afterwards, enough for the evening too. The Apex 300 keeps 1,440 Wh.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, weight is: at 67.5 lbs the DELTA 3800 Gen4 is the one you'll be glad you brought. Fan noise under load is worth a listen too — it's audible in the lulls between songs.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither covers 4,685 Wh alone. The DELTA 4 (3800) is 1,486 Wh short and the Apex 300 is 2,335 Wh short. Both take extra batteries.
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 3800 Gen4 runs 15.6h vs 11.5h.
$2,199 list · direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sized →
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 0–213.2hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–42.6hHigh-Draw Appliances
These reveal the real limitsscale 0–3.2h¹ 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
November 4, 2026
Verdict: the EcoFlow DELTA 3800 Gen4
I'd pay the extra for the DELTA 4 (3800), unless your outages end by breakfast. It holds 3,763 Wh against 2,764.8 Wh and weighs 67.5 lb against 83.78 lb, and at $2,199 against $1,699 the two come out about level per watt-hour. After the 8-hour blackout it has 1,554 Wh left to the Apex's 705 Wh. Both take extra batteries, so growth doesn't split them. The Apex 300 answers with the lower price, 240 W more output and 400 W more solar input, and it's on sale now while the DELTA 4 (3800) ships in late NovemberA10.
Today the Apex 300 is $1,499, $200 under its typical $1,699. The verdict weighs typical prices, not today's. Prices checked 31 days ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 4, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$2,199.00 · direct from EcoFlow
or check the Apex 300 price$1,499.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated November 4, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Tailgating, Apartment Balcony.
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 3800 Gen4 rates 4.1/5 (48th percentile of 22 Home Backup-class units), and Apex 300 rates 4.8/5 (89th percentile of 29 Large-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.
16 Lb Lighter With the Bigger Battery
The DELTA 4 (3800) is 67.5 lb and the Apex 300 is 83.78 lb, and the lighter one holds 3,763 Wh to 2,764.8 Wh. Neither is a one-hand carry. Only the Apex is a hand-truck job.
Apex 300: 45dB Published
45dB is about as loud as a running refrigerator. The DELTA 3800 Gen4 is rated 40dB, and the two are not the same kind of figure: the DELTA 3800 Gen4's is a MAXIMUM under heavy charge and discharge, while the Apex 300's is its maker's best case — so the real gap can only be wider than the numbers suggest: the DELTA 3800 Gen4's ceiling already sits below the Apex 300's floor. For most people, fan noise around 45dB and up is where sleep starts to suffer.
Apex 300: Power Lifting to 7,680W
The Apex 300 has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 7,680W from its 3,840W inverter. It does that by delivering less power than the appliance asks for, not more than the inverter has: the heater still works, it just heats more slowly. Two things follow. BLUETTI scopes the mode to purely resistive loads — a heater, a kettle, an incandescent lamp — so it does nothing for a fridge compressor, a pump or a power tool, and this record publishes no surge figure at all, so read the mode as a resistive-load feature rather than as starting ability. And it is not a reason to size down, because running a load that big from 2,765Wh is a short session either way. Genuinely useful if a heater or a kettle is why you're buying; beside the point otherwise. EcoFlow's X-Boost works the same way, running a resistive load past the inverter's rating at reduced power, but our record for the DELTA 3800 Gen4 carries no X-Boost figure, so check EcoFlow's spec sheet before comparing the two ceilings.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Both figures are maximums rather than guarantees: EcoFlow's depends on registering the unit in the EcoFlow app, which adds two years to a three-year standard term; BLUETTI's on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term. Worth saying because the per-dollar framing can suggest otherwise: the Apex 300 works out at 2.9 years of cover per $1,000 spent against the DELTA 3800 Gen4's 2.3, but that spread is the price gap, not the terms.
Full record above — the Test Desk pick is the DELTA 3800 Gen4.
Check DELTA 3800 Gen4 price →or check the Apex 300 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 cost the same to own over their rated lives — $0.10/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 6,000-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
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further — flagship paths, not line-wide features.
Worth knowing
Tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). 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. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it — the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
EcoFlow positions itself as a mid-to-premium brand with stronger support infrastructure, while BLUETTI competes on value. The question is whether the EcoFlow ecosystem and support premium is worth it for your use case.
Growth path
DELTA 3800 Gen4
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,763Wh.
Accepts up to 2,000W 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.
Apex 300
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,765Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Limited ports. You'll likely need a power strip or splitter.
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, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3800 Gen4
Nobody owns one yet. EcoFlow put the DELTA 4 (3800) on sale in the US on November 4 and says it ships in late NovemberA10, so this side runs on EcoFlow's store page and FAQ, plus our own sumsA1A6.
The test I'd want is two nights on a stocked fridge. EcoFlow claims up to 70 hours of fridge runtime, its own figure rather than a measurement of oursA12. Loaded with groceries, opened at dinner and run into a second evening, a fridge draws more, and that's where this unit's reserve should show.
“Capacity 3,763 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3800 Gen4; buyers and the press call the pair the DELTA 4.”
Sources
us.ecoflow.co · jp.ecoflow.co
BLUETTI Apex 300
Owners keep tripping over firmware updates. A unit stuck in Backup modeB1, an error code that stopped chargingB2, a Home Assistant link that droppedB3, an update prompt that never clearsB4. Software can be patched, but the pattern is consistent.
Reviewers find it heavy and its app slow. One could carry it only a few feet at a timeB8. Another finds BLUETTI's app a little sluggish next to EcoFlow'sB10. The outlets sit behind rubber bungs, handy under a sink and awkward with fat plugsB9. Most of this comes from early reviews rather than long-term ownersB0.
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Launch-day ledger: every entry is EcoFlow's own US store and documentation, or our labelled arithmetic. No owner or reviewer evidence exists yet. [DELTA 3800 Gen4 · 12 entries]
- Multiple owners report firmware updates causing app glitches, mode-lock issues, error codes, or Bluetooth/Home Assistant disconnects shortly after updating. [Apex 300 · 4 entries]
- Reviewers consistently flag the lack of built-in USB/DC ports as a design tradeoff requiring costly add-on accessories (Hub D1, Hub A1). [Apex 300 · 4 entries]
- The unit's extreme weight (~85 lbs) is repeatedly described as making it barely 'portable' and hard to carry alone. [Apex 300 · 2 entries]
- A1
“Capacity 3,763 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3800 Gen4; buyers and the press call the pair the DELTA 4.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A2
“US unit: 120 V AC, 60 Hz; rated 3,600 W continuous with a 7,200 W surge. It supports X-Boost (EcoFlow refers to the manual for the US X-Boost figure); X-Boost is unavailable while the unit charges from the wall or runs in bypass.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A3
“AC outlets: 5 total, four rated 20 A max and one rated 30 A max (on EcoFlow's product images, four T-slot outlets and a three-slot twist-lock). USB-A: one port, 36 W max. USB-C: one at 140 W max and two at 65 W max; the two 65 W ports share circuitry with the USB-A, limited to 16 W total when used together. No 12 V car socket.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A4
“AC input 100–120 V, 15 A, 50/60 Hz; X-Stream charging up to 1,800 W from a US wall outlet. Our arithmetic: 1,800 W at 120 V is 15 A, the full rating of an ordinary 15 A circuit, so on a shared circuit you would set the charge rate lower in the EcoFlow app.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A5
“Solar: two inputs, 11–60 V DC at up to 20 A and 1,000 W each, 2,000 W total (XT60i; two XT60i-to-LP60 cables are in the box). EcoFlow lists six charging methods; its 800 W Alternator Charger is limited to 500 W through the Solar/DC port.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A6
“Extra Battery Port: up to two extra batteries through EcoFlow's Smart Extra Battery Expansion Adapter. Compatible: the DELTA Pro 3 Smart Extra Battery and the DELTA 3 Max Plus (2,048 Wh) Smart Extra Battery. EcoFlow quotes 4–12 kWh of expandable capacity.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A7
“Weight 67.5 lb (30.6 kg); 16.77 × 11.36 × 12.09 in without handles, 18.76 in long with them. A handle at each end; EcoFlow sells a folding transport cart separately ($109 at launch, listed at $199). EcoFlow calls it the smallest and lightest portable power station in its class (3–4 kWh and 3,600 W).”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A10
“On sale at us.ecoflow.com from November 4, 2026 at $2,199; EcoFlow says it ships in late November. Kits: with two 160 W solar panels $2,899; with a DELTA 3 Max Plus extra battery (6 kWh in all) $2,999. EcoFlow also sells it in Japan, where it went on sale October 30 at ¥240,900.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A12
“Powers a refrigerator for up to 70 hours, which EcoFlow says is 17 hours (32.6%) longer than the industry average for 3–4 kWh portable power stations. Both figures are EcoFlow's own claims, not our measurement.”
EcoFlow US store, us.ecoflow.com/products/delta-3800-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [positive]
- B1
“I updated my Apex 300 to the latest firmware yesterday. Now it's stuck in 'Backup' mode... Now when I go into the app to try to change it back, it flashes to...”
BLUETTI Community forum — 'Apex 300 stuck in Backup mode after last firmware update' · 2025-11 · [negative]
- B2
“When the system reached 97% charge, I decided to install the firmware updates. After the update completed, the charging stopped and I received Error 004.”
BLUETTI Community forum — 'Error E004 Apex 300' · 2025-11 · [negative]
- B3
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
GitHub bluetti-official/bluetti-home-assistant issue #95 — 'APEX 300 and Hub A! now working' · 2026-05 · [mixed]
- B4
“Problem is every time I connect to the power station it shows that I still have an update, and I need to tap to upgrade which then tells me I am up to date.”
BLUETTI Community forum — 'Check For Update App issue' · 2025-09 · [negative]
- B6
“It's heavy, no question, but the handles and modular battery design make it manageable.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [mixed]
- B7
“Not having DC or USB ports on the face is a tradeoff. The Hub D1 solves the problem—but it's an additional $300 accessory that you then have to bolt on after the fact.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [negative]
- B8
“In fact, it's so heavy I can hardly carry it more than a few feet at a time and have been unable to lift it onto a table.”
T3 — 'Bluetti Apex 300 review: transform your off-grid life' · 2025-11 · [negative]
- B9
“Each is protected by a rubber bung, which is good if you've got the Apex 300 below the sink in a utility room or RV. It can be annoying when it comes to inserting oversized plugs or adaptors, though.”
Trusted Reviews — 'Bluetti Apex 300 Review' · 2025-10 · [mixed]
- B10
“The Bluetti app is still a little sluggish compared to the EcoFlow or Anker apps, but it lets you toggle power modes, monitor stats, and tweak settings from a distance.”
TheSolarLab — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [mixed]
- B12
“Say you want to connect multiple Apex 300 power stations together, you'll need to buy the Bluetti Hub A1 Parallel Box, which retails for around $699!”
TheSolarLab — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [negative]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3800 Gen4 if you…
- →Your outages run past one night. After the 8-hour blackout it has more than twice the Apex's reserve.
- →You already own an EcoFlow extra battery. The DELTA 4 (3800) takes the DELTA 3 Max Plus and DELTA Pro 3 onesA6.
- →You'll move it now and then. 67.5 lb against 83.78, for the bigger battery.
- →You want USB-C on the box. One 140 W port and two 65 W portsA3, where the Apex 300 needs its Hub D1B7.
Buy the Apex 300 if you…
- →One night of backup is the whole plan. The Apex 300 finishes the 8-hour blackout with 705 Wh to spare and costs $500 less.
- →You need power before late November. The DELTA 4 (3800) ships thenA10, and the Apex is on sale now at $1,699.
- →You have more than 2,000 W of panels. The Apex takes 2,400 W.
- →Your loads stack past 3,600 W. The Apex runs 3,840 W continuously.
If neither fits
If the plan is a router, a phone and a lamp for one evening, both are more box than you need. Either holds that night several times over. A much smaller unit does the same job for a fraction of the weight.
The Bottom Line
If your outages run long, I'd pay the difference for the DELTA 4 (3800). It has more than twice the Apex's reserve after a night without power, in the lighter box, at about the same cost per watt-hour.
If one night is the whole plan, or you need power before it ships in late NovemberA10, buy the Apex 300. It covers the first night for less, and you can order it today.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can I buy the EcoFlow DELTA 4 (3800) in the US?
Yes. EcoFlow put it on sale at its US store on November 4, 2026, at $2,199, and says it ships in late November.
Which lasts longer in a power outage, the DELTA 4 (3800) or the Apex 300?
The DELTA 4 (3800). It holds 3,763 Wh against 2,764.8 Wh. After an 8-hour blackout that uses 1,645 Wh, it has 1,554 Wh left against 705 Wh on the Apex 300.
Can both add extra batteries?
Yes. The DELTA 4 (3800) takes up to two of EcoFlow's DELTA 3 Max Plus or DELTA Pro 3 extra batteries, and EcoFlow quotes 4 to 12 kWh in all. The Apex 300 takes BLUETTI's expansion batteries.
Is the DELTA 4 (3800) worth the extra money over the Apex 300?
It is if you need more than one night of backup. It costs $500 more, holds about a third more battery and comes out about the same per watt-hour. If one night is all you cover, the Apex 300 does that for less.
Which one has more power output?
The Apex 300, at 3,840 W continuous against 3,600 W. EcoFlow rates the DELTA 4 (3800) to a 7,200 W surge. BLUETTI publishes no surge figure for the Apex 300.
Brand matchup
EcoFlow vs BLUETTI: measured across every matchup →Where to buy
EcoFlow DELTA 3800 Gen4Pick
$2,199.00
$2,199.00 · direct from EcoFlow
BLUETTI Apex 300
$1,499.00
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 31 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.