Head-to-head test
Anker SOLIX F3800 vs BLUETTI Apex 300 + B300K
Above 3,840 watts of steady draw the F3800 is the only one of these two that holds the load; below it, the Apex is the cheaper energy in every direction, and almost nobody lives above it.
Full profiles: Anker SOLIX F3800 → · BLUETTI Apex 300 + B300K →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$2,199.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
$2,599.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The F3800 costs $2,000 and the Apex 300 + B300K bundle costs $2,599, and the $599 between them buys 44% more battery: 5,530Wh against 3,840Wh. That's the easy half of this comparison. The hard half is that the cheaper unit has the bigger inverter, by a lot.
Anker's box sustains 6,000W and peaks at 9,000W. BLUETTI's stack sustains 3,840W and peaks at 7,680W. Both units clear the peak draw in all six load profiles we model, which is why the scenario table below gets decided entirely on watt-hours, and watt-hours are the thing the Apex has more of.
So the real question is whether your worst night is a wattage problem or an energy problem. Most people weighing these two are backing up a fridge, a furnace fan, some lights and a laptop, and will never see the Apex's ceiling on the display. Those buyers should take the Apex and stop thinking about it. If you're feeding a subpanel with a well pump hanging off it, read the surge section first and then buy the Anker, which is both the stronger unit for that job and the less expensive one.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Typical price
Eight cents undercuts both units' own blended rates, $0.13 per lifetime kWh for the Apex and $0.17 for the F3800, so the upgrade is the best-value energy on the page rather than a premium for a bigger box. And since both take the same 2,400W of solar and carry the same five years of warranty, none of that extra capacity costs more to refill or more to insure.
F3800: $2,000, 3,840Wh, 3,000 cycles, 11,520 lifetime kWhApex 300 + B300K: $2,599, 5,530Wh, 3,500 cycles, 19,354 lifetime kWhBoth accept 2,400W of solar and both carry a 5-year warranty
Why it mattersIf you're keeping this longer than a couple of outages, stop reading the gap as a price difference and start reading it as the cheapest kilowatt-hours available here.
continuous output
Breakers trip on watts, not on ratios. If your worst-case simultaneous draw lands between 3,840W and 6,000W, the F3800 is the only unit here that sustains it, and that gap stays invisible on this page for the simple reason that none of the modelled scenarios is a whole-house panel with motors on it.
F3800: 6,000W continuous, 9,000W surgeApex 300 + B300K: 3,840W continuous, 7,680W surgeAll six modelled scenarios show both units clearing their peak demand
Why it mattersAnyone wiring into a transfer switch should buy the F3800 and ignore the capacity column, because this is the one situation where the cheaper unit is also the stronger one.
On the spec sheet the recharge story is a tie at 2,400W of solar each. In the field it isn't. One of them has a reviewer describing a full turnaround inside an hourB12 and the other has an owner forum trading workarounds for its input stageA13. On day three of a grid-down week, how fast the box comes back is worth more than what it cost.
The F3800 holds 3,840Wh, 1,690Wh less than the Apex bundleOwners consistently report the F3800's DC input is restrictive enough to push them onto Anker's own panelsA1A2A13A14One owner backed his wall charging down from 1,800W to 600-800W because the line cord ran hotA3, and another reports no passthrough, so the unit charges or discharges but not bothA4
Why it mattersBuying for multi-day outages rather than weekends? Weight recharge behavior above sticker price, and that points at the Apex.
An undisclosed noise rating is a spec you're being asked to take on faith at 3 a.m., and the field notes don't fill the blank cleanly: one review describes fans going silent and then cycling in and out unpredictablyA12, and an owner running a heavy AC load heard a second of buzz as the inverter ramped, which Anker support traced to a ferrite bead vibrating inside the caseA6A7. The Apex states its number and switches over twice as fast behind anything that shouldn't blink.
CPAP Overnight draws 320Wh: 10% of the F3800's 3,264Wh usable, 7% of the Apex's 4,700Wh usableApex switches over in 10ms; F3800 in 20msBLUETTI publishes 45dB under load; Anker publishes no noise figure for the F3800
Why it mattersMedical and bedside buyers should take the Apex on the noise disclosure alone, price gap notwithstanding.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The price gap buys 7,834 more lifetime kilowatt-hours, 19,354 against 11,520, which is where this matchup is actually settled.
cost / lifetime kWh
Both units are warranted for five years, and that number should occupy you more than either lifetime total. Rated cycles are a lab promise. A warranty is a company's own bet, in writing. On that basis the F3800 costs $400 a year to own and the Apex $520, and those are the only two figures here that anybody is obliged to honor.
The lifetime math still leans hard toward the Apex, hard enough that the sticker price doesn't rescue the F3800 on its own. What would rescue it is a short ownership horizon. If this comes off a shelf three times a winter, or you expect to sell it inside two years, you'll never approach the cycle counts that make the Apex the cheaper unit, and then the purchase price is the entire story.
What the Specs Don't Tell You
Selected because: The F3800's 9,000W surge ceiling and the Apex's 10ms switchover are the two specs most likely to change your pick, and both live here.
rated cycles
The two surge cards contradict each other on purpose. Measured against its own inverter, the Apex has the deeper reserve, doubling its rating under load where the F3800 only goes half again above its own. But a compressor doesn't care what fraction of rated output it's asking for. It asks for watts, and the F3800's ceiling is 1,320W higher.
The switchover gap runs the other way and lands in a narrower place. Ten milliseconds against twenty is the line between line-interactive and standby, and it only shows up behind hardware that treats a 20ms interruption as a power failure. A desktop with no UPS in front of it, a NAS mid-write. Your fridge will never know it happened.
Your Life, Your Pick
Selected because: Five of the six modelled loads sit comfortably inside both units; the sixth is past the F3800 and inside the Apex by 15Wh.
Van Life Daily is the only profile that genuinely separates these two, and it separates them completely. A 4,685Wh day against the F3800's 3,264Wh of usable reserve means you go dark in the evening, every evening. The Apex covers it out of 4,700Wh usable, and it's worth naming what that margin actually is: 15Wh. That's not headroom, that's a rounding error, and anyone truly pulling that much daily should budget a second expansion battery rather than reading the check mark as comfort.
Everywhere else the percentages are trivia. A weekend's 2,100Wh takes 64% of the Anker and 45% of the BLUETTI, and both come home with power to spare. The table gives the Apex those rounds because it has more left over at the end, not because the F3800 struggled at any point, and leftovers are only worth paying for if you have a plan for them.
Portability & Form Factor
Selected because: 132.3 lb against 148.8 lb: neither is a one-person carry, which changes where you put it more than which one you buy.
weight
132.3 lb and 148.8 lb are the same problem wearing different labels. Both are two-person lifts, both want a hand truck for anything involving stairs, and the 16.5 lb between them will not be the part you remember about moving either one. Reviewers who've handled the stacked Apex describe close to 150 pounds of battery and inverter that you shift with handles or a trolley and don't casually carry anywhereB5B14.
What that decides is placement, not purchase. Pick the corner of the garage or the utility room now, because whichever one you buy is going to live there permanently. If the phrase 'portable power station' is what brought you to this page, both of these are the wrong category.
Brand Trust
Selected because: Both brands are strongest on hardware and weakest on support, and at this weight the return path is part of the warranty.
Support is the risk you're actually underwriting here, and the two brands fail differently. Anker's no-hassle replacement reputation was built by its consumer-electronics business, and SOLIX-specific service has been drifting away from it, with AI-driven first contact and hazmat freight rules that turn returning something this heavy into a project of its own. Owner accounts split hard: one describes being ghosted after a five-figure SOLIX orderA8, another reports advance replacements arranged over the phone without frictionA9.
BLUETTI's support is the most inconsistent in the category, email-first and lagged by time zones, and buying direct rather than through a marketplace is the single thing that most improves your odds when something goes wrong. Set against that, the app is BLUETTI's, at 4.5 on both platforms against Anker's 4.5 on iOS and 4.3 on Android. The app is the part you touch weekly. Support is the part you touch once, badly, on the worst possible day.
Strengths & trade-offs
Anker SOLIX F3800
Strengths
- +Costs $599 less
- +Lighter by 16.5 lb
- +Higher AC output
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the Apex 300 + B300K's 6,000, so it wears out sooner.
BLUETTI Apex 300 + B300K
Strengths
- +Larger battery capacity
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Significantly heavier (+16.5 lbs), making it harder to move.
- –Weaker inverter (-2,160W) limits appliance compatibility.
- –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
Neither unit
A weekend's 2,100Wh takes 64% of the F3800's usable reserve and 45% of the Apex's. Both drive home with power still in them, so this round goes to the Apex on margin rather than on capability, and margin is only worth paying for if you have plans for it.
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
Apex 300 + B300K
1,645Wh of overnight essentials leaves the F3800 at half and the Apex with roughly two-thirds of its reserve. Neither breaks a sweat. What actually separates them is hour nine, and day two, and whether the sun comes out.
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 night on a CPAP is 320Wh, which is 10% of the F3800's usable reserve and 7% of the Apex's. Both finish the night barely touched, so capacity decides nothing here. Break the tie on the two specs that matter 18 inches from your head: BLUETTI publishes 45dB under load and switches over in 10ms, while Anker publishes no noise figure and takes 20ms.
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
Both power your workstation all day without strain, and their USB-C output is a wash — pick on weight, ports, or price.
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
Neither unit
Scoring these two at a tailgate is a category error: neither travels — the SOLIX F3800 is 132.3 lbs and the Apex 300 + B300K 148.8 lbs, and at those weights they roll off a truck bed if they go anywhere at all. The 670Wh here is trivial for either — it's the going that doesn't happen. If you need power away from the building, you're shopping the wrong class.
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
Apex 300 + B300K
4,685Wh a day is past the F3800. With 3,264Wh usable you're dark by evening, every evening. The Apex covers it from 4,700Wh usable, a margin of 15Wh. Treat that as a pass rather than as comfort: at this draw the honest configuration is a second expansion battery.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: Apex 300 + B300K runs 22.9h vs 15.9h.
$2,599 list · direct from BLUETTI
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 0–313.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–62.7hHigh-Draw Appliances
These reveal the real limitsscale 0–4.7h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
August 9, 2026
Verdict: the BLUETTI Apex 300 + B300K
Take the Apex 300 + B300K unless your worst-case simultaneous draw sits above 3,840W. The money you'd save on the F3800 costs you 1,690Wh of battery, 500 rated cycles, a 20ms switchover instead of 10ms, and any published noise figure at all, while the extra energy the Apex carries works out to the cheapest kilowatt-hours on this page. The exception is real and it isn't small: the F3800 sustains 6,000W and peaks at 9,000W, so if you're backing up a panel with heavy motor loads on it, that ceiling is the whole decision and the cheaper unit happens to own it.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 9, 2026. The links below open Anker's and BLUETTI's current prices.
$2,599.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
or check the SOLIX F3800 price$2,199.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated August 9, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living.
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, SOLIX F3800 rates 4.7/5 (80th percentile of 16 Home Backup-class units), and Apex 300 + B300K rates 4.4/5 (67th percentile of 16 Home Backup-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.
132.3 lb and 148.8 lb are the same answer
Neither of these goes in a trunk. Both are two-person lifts, or one person and a hand truck, and the 16.5 lb between them changes nothing about how you'll move them. Decide where it lives before it arrives, because that's the decision you're really making.
Apex 300 + B300K: 45dB Published
45dB is about as loud as a running refrigerator. It is BLUETTI's own rating rather than a reading on a shared bench — makers differ on whether they quote a best case or a figure under load, so treat it as a starting point rather than what you would hear at a bedside. For most people, fan noise around 45dB and up is where sleep starts to suffer.
Surge: the ratio flatters one, the ceiling flatters the other
The Apex doubles its rating under surge, 3,840W to 7,680W. The F3800 only adds half again, 6,000W to 9,000W. Read as a ratio, the Apex looks like the deeper reserve. Read as a number, the F3800 starts things the Apex can't. A compressor asks for watts, not for a percentage of the inverter's rating, so when these two disagree, believe the ceiling.
10ms against 20ms is narrower than it sounds
The Apex switches in 10ms and the F3800 in 20ms, which is the line between line-interactive and standby. It shows up behind hardware that treats a 20ms interruption as a power failure: a desktop with nothing in front of it, a NAS mid-write. Your fridge, your furnace fan and your lights will never know either one happened.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The Apex 300 + B300K's figure is a maximum rather than a guarantee — it depends 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 SOLIX F3800 works out at 2.5 years of cover per $1,000 spent against the Apex 300 + B300K's 1.9, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The Apex 300 + B300K is rated for 6,000 cycles vs 3,000. In real life: at daily use, that's 16.4 vs 8.2 years. At weekend use (twice a week), it's 58 vs 29 years. One caution reading years across different sizes: a cycle is 5,530Wh on the Apex 300 + B300K and 3,840Wh on the SOLIX F3800, so count lifetime energy — roughly 33,178 kWh against 11,520 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Anker doesn't publish a noise rating for the F3800
BLUETTI states 45dB under load for the Apex. Anker states nothing for the F3800, which is a conspicuous blank on a unit sized for a hallway or a utility room. That isn't evidence the F3800 is loud. It's evidence you find out after you buy it, which is a worse place to be standing if the thing is going anywhere near a bedroom.
Full record above — the Test Desk pick is the Apex 300 + B300K.
Check Apex 300 + B300K price →or check the SOLIX F3800 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 SOLIX F3800 is cheaper to buy, but the Apex 300 + B300K is cheaper to own. At $0.08/kWh over its lifetime vs $0.17/kWh, the Apex 300 + B300K's higher cycle life and capacity make each dollar go further over the years.
Brand trust
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
Anker's no-hassle replacement reputation was built by its consumer-electronics business, and SOLIX-specific service has been drifting away from it: AI-driven first contact, and hazmat freight rules that turn returning a 132.3 lb unit into a project of its own. The parent brand is still strong. The department that would handle your F3800 is the part trending down.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Long cycle life through InfiniPower, plus genuinely strong dollars-per-watt-hour across the mid-size and larger units.
Worth knowing
Firmware updates have removed features without warning, and the expansion ecosystem is narrower than EcoFlow's.
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 category, email-first and lagged by time zones. Some cases close smoothly; others turn into weeks of runaround, or an offer of a discount on a new unit in place of a repair. Buying direct from BLUETTI rather than through a third party tends to produce better 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-per-dollar anywhere in the category, from a lineup wide enough to include sodium-ion cold-weather units and dual solar-plus-alternator vehicle hubs that nobody else builds.
Worth knowing
BLUETTI standardizes on LFP across the range, quoted at 3,500 to 6,000+ cycles. This bundle sits at the floor of that band at 3,500, not the ceiling. Older discontinued models have also gone unrepairable for want of spare parts.
Analyst note
Both are hardware-strong and support-weak, which is the normal shape of this category, and neither should be bought on the assumption that a problem gets solved quickly. Anker's is a decline from a high base; BLUETTI's is a lottery you improve by buying direct. Where they cleanly differ is the app, and BLUETTI's is the better one.
Growth path
SOLIX F3800
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,840Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Apex 300 + B300K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 5,530Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
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.
Anker SOLIX F3800
The F3800's owner record is dominated by one complaint, and it's about getting energy in rather than out. Owners consistently report that the DC input's constraints make it hard to use anything but Anker's own panels, which get expensive in a full arrayA1A2A13A14. One says he reaches for solar only when there's no other way to charge the thingA1. Another backed his wall charging down from 1,800W to 600-800W because the line cord ran hotA3, and a third points out there's no passthrough at all, so it charges or it dischargesA4.
The rest reads better. One owner has been running his loads through a transfer switch off a single 120V outlet for a couple of weeks and hasn't found something it refuses, a water pump includedA5. Another, coming off months of EcoFlow firmware trouble, reports zero issues with itA10. Noise is mixed and unofficial: fans that go silent and then cycle in and outA12, and an owner with four expansion packs who heard about a second of buzz on heavy AC startup, which Anker support attributed to a vibrating ferrite beadA6A7. Support itself is a coin flip, ghosted after a large order in one accountA8 and advance-replaced without argument in anotherA9.
“I have been using the F3800 for a couple weeks now, using only a single 120V outlet into a reliance transfer switch and it runs everything I throw at it including a water pump.”
Sources
diysolarforum.com · thesolarlab.com
BLUETTI Apex 300 + B300K
Field data on the Apex 300 + B300K is thin and early, and that's worth saying plainly: what exists comes from reviewers with test units rather than owners a year inB4B12, with no long-term reliability or idle-drain reports for this exact bundle yet. Read the praise with that in mind.
What the reviewers do agree on is that it behaves like a generator replacement without the noise or the fumesB4, and that it comes back fast, with one describing a full turnaround inside an hourB12. Real-load testing backs the capacity claim: a wash cycle took it from 100% to 65% in about an hour, and a heat-pump dryer run pulled it down to 20% over the following hour and a halfB9B10. The consistent complaint is the front panel. Reviewers keep returning to how little comes out of the Apex 300 in small formats, with DC and USB living on a hub sold separately that they consider steep for what it doesB1B2, and one who tried charging a phone off the B300K got a trickle rather than a chargeB6.
“The Apex 300 doesn't have USB ports, DC ports, or much of anything beyond its six AC plugs and high-voltage connectors.”
Sources
thesolarlab.com · techspective.net · digitalreviews.net · thesolarpit.com · cleantechnica.com · trustedreviews.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 consistently complain that the solar/DC input is restrictive, effectively locking users into pricier Anker-branded panels rather than generic arrays. [SOLIX F3800 · 4 entries]
- Fan/inverter noise is generally reported as quiet at idle but with occasional intermittent buzzing/rattling under load or fault conditions. [SOLIX F3800 · 3 entries]
- Anker support experiences are polarized — some owners report fast, responsive replacements while at least one reports being ignored after a major purchase. [SOLIX F3800 · 3 entries]
- Reviewers consistently flag that the base Apex 300 has no USB/DC ports and requires a separate paid Hub D1 accessory, which some feel is overpriced for what it offers. [Apex 300 + B300K · 3 entries]
- Multiple sources note the extreme weight/bulk of the stacked Apex 300 + B300K system, making 'portable' a stretch despite handles/trolley options. [Apex 300 + B300K · 2 entries]
- Reviewers praise fast recharge and the system's ability to genuinely replace a generator for home backup and heavy loads like washers/dryers. [Apex 300 + B300K · 4 entries]
- A1
“The solar input for charging is a pain, so much so that I'm only using it if there is no other way to charge the F3800.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- A2
“The limitations of the inputs make it very difficult to use solar panels other than Anker's panels, which are pricey for a "full up" config.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- A3
“if you charge the F3800 from a 120VAC wall outlet at full rate (1800 watts), the line cord gets very hot. I've backed off the charge rate to 600-800 watts.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- A4
“the lack of passthru mode, you cannot charge via the 120VAC input while discharging.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- A5
“I have been using the F3800 for a couple weeks now, using only a single 120V outlet into a reliance transfer switch and it runs everything I throw at it including a water pump.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [positive]
- A6
“I have 4 BP3800s and one of them made similar buzzing/rattling noise when a heavy AC load was starting up... only for around a second while inverter was ramping up.”
diysolarforum.com — 'Big issue with Anker Solix F3800 plus battery pack' · 2025-08 · [mixed]
- A7
“Anker support told me it was a ferrite bead vibrating inside the unit... This reduced the noise, initially. At some point, I moved the batteries around and now the noise is gone.”
diysolarforum.com — 'Big issue with Anker Solix F3800 plus battery pack' · 2025-08 · [mixed]
- A8
“Anker support is ghosting me after I spent over 20k on their solix line and solar panels within a month... they are not answering/returning my calls or emails.”
diysolarforum.com — 'Big issue with Anker Solix F3800 plus battery pack' · 2025-08 · [negative]
- A9
“I've called them and submitted tickets via their portal, always very responsive. They've even done advanced replacement for me.”
diysolarforum.com — 'Big issue with Anker Solix F3800 plus battery pack' · 2025-08 · [positive]
- A10
“I've had zero issues - especially compared to the EcoFlow firmware issues I fought with for months.”
diysolarforum.com — 'Anker solix f-3800 diy solar array' · 2024-02 · [positive]
- A12
“Sometimes the fans are completely silent, then they kick in and out intermittently.”
thesolarlab.com — 'Anker SOLIX F3800 Review: Did It Kill the Competition?' · unknown · [mixed]
- A13
“no one on Youtube is addressing the solar input problem directly. But People smarter than myself with secondary charge controllers... are able to navigate around the problem.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [negative]
- A14
“other than the solar input problem having limited panel array choices to max out it's input capability it's a great unit so far.”
diysolarforum.com — 'Anker F3800 user reviews and opinions welcome' · 2024-07 · [mixed]
- B1
“The Apex 300 doesn't have USB ports, DC ports, or much of anything beyond its six AC plugs and high-voltage connectors.”
thesolarlab.com — Bluetti Apex 300 Review: Cheap, Practical Home Backup? · unknown (2025/2026) · [mixed]
- B2
“That Bluetti D1 Power Hub that gives you your DC and USB ports costs about $300, which is a steep price for what you're getting.”
thesolarlab.com — Bluetti Apex 300 Review: Cheap, Practical Home Backup? · unknown (2025/2026) · [negative]
- B4
“It's one of the few systems I've tested that feels like it could genuinely replace a generator, without the noise, fumes, or maintenance.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09-21 · [positive]
- B5
“Stacked, you're near 150 pounds of lithium iron phosphate and inverter muscle—movable with the built-in handles or a trolley... but not something you'll casually lug to a picnic.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09-21 · [mixed]
- B6
“I just wonder why Bluetti did not include a USB-C port with some decent output, like 100 or 140W as I only got a measly 8W charge out of it for my phone.”
digitalreviews.net — Bluetti B300K Expansion Battery Review · 2025-12 · [negative]
- B9
“Results: 1 wash took about 1 hour and drained the Apex from 100% down to 65%.”
digitalreviews.net — Bluetti Apex 300 Power Station Tests (Australia) Part II · 2025-09 · [positive]
- B10
“Just for fun we then turned on our heat pump dryer to see that over 1½ hours it would further drain it down to 20%.”
digitalreviews.net — Bluetti Apex 300 Power Station Tests (Australia) Part II · 2025-09 · [mixed]
- B12
“During my testing, the recharge speed was astonishing. In under an hour, I had a system ready to go again.”
thesolarpit.com — Bluetti Apex 300 Review · 2025-10-28 · [positive]
- B14
“As will you: it weighs in at 38kg, and is probably much too big and heavy for most people to carry alone.”
trustedreviews.com — Bluetti Apex 300 Review · 2025-10-10 · [negative]
Research compiled August 9, 2026.
Who Should Buy Which
Buy the SOLIX F3800 if you…
- →You're feeding a transfer switch or a subpanel where simultaneous draw can climb past 3,840W. This is the only one of the two that sustains it, and it's the less expensive one.
- →Your loads are many and small: phones, laptops, a CPAP, camp lights. The Anker's port complement is the complete one, and you'd be paying the Apex's premium for capacity you'd then spend through an accessory.
- →You'll use it a handful of times a year. At low cycle counts the lifetime math never arrives, and the purchase price is the whole argument.
- →You already own Anker panels, or you were going to buy them anyway, which turns the input restriction owners complain about into a non-issueA1A2.
Buy the Apex 300 + B300K if you…
- →You're covering multi-day outages. 5,530Wh, 3,500 cycles and a fast recharge matter more on day three than the sticker price did on day one.
- →The unit sleeps in the bedroom or next to a CPAP. BLUETTI publishes 45dB under load and switches over in 10ms; Anker publishes nothing on noise and takes 20ms.
- →You're building a van or an off-grid cabin around it and expect deep daily cycling. This is the unit that survives the arithmetic, though at 4,685Wh a day you're one expansion battery short of comfortable.
- →You want the lowest cost per kilowatt-hour across the unit's whole life and you intend to actually get there.
If neither fits
If you came here wanting something you can carry to a campsite by yourself, close this tab cheerfully. The lighter of these two is 132.3 lb, and both are appliances you install rather than pack. Look at the 1,000-2,000Wh class instead: you give up whole-house backup and get back the ability to move it without a second person. And if the real job is keeping a router, two phones and a CPAP alive through a normal evening outage, note that a full night on a CPAP is 320Wh and both of these are roughly ten times the machine that needs.
The Bottom Line
Take the Apex 300 + B300K. What it costs extra comes back as the cheapest energy on this page, around eight cents a kilowatt-hour on everything you're adding, and the smaller things all lean the same direction: more rated cycles, a faster switchover, and a published noise figure where the other unit leaves a blank. Neither of these is portable, both brands will test your patience if you ever need support, and the Apex's front panel is genuinely stingy about small outputs. None of that changes the arithmetic.
The one exception is worth repeating, because it flips this cleanly rather than shading it. If your worst-case load lives above 3,840W, everything above stops mattering: the F3800 holds it, the Apex doesn't, and you pay less for the privilege. Everyone else, buy the battery.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Apex 300 + B300K worth $599 more than the Anker F3800?
Yes, if you're going to cycle it regularly. That gap buys 1,690Wh more battery and 500 more rated cycles, which compound into 7,834 additional lifetime kilowatt-hours, or roughly eight cents per kWh on the energy you're adding. If the unit is going to sit in a closet and come out twice a year, you'll never reach the cycle counts that make that true, and the F3800 is the better buy.
Which one can run more appliances at the same time?
The Anker F3800, by a wide margin. It sustains 6,000W and peaks at 9,000W against the Apex bundle's 3,840W sustained and 7,680W peak. The Apex has the better surge multiple, doubling its rating where the Anker adds half again, but a motor starting up asks for absolute watts and the Anker's ceiling is 1,320W higher.
Can either of these actually run a van full-time?
The Apex can, barely. A full van-life day in our model draws 4,685Wh, and the Apex has 4,700Wh usable after inverter losses, so it clears by 15Wh. The F3800's 3,264Wh usable doesn't get there and you'd be dark by evening. If you genuinely pull that much every day, budget for a second B300K rather than living on a 15Wh margin.
How loud are they?
BLUETTI rates the Apex at 45dB under load, which is a quiet room. Anker publishes no figure at all for the F3800, and the field notes are mixed: fans that go quiet and then cycle in and out, plus one owner who heard about a second of buzz when a heavy AC load started, traced by Anker support to a ferrite bead vibrating inside the case. If the unit is going anywhere near where you sleep, that missing spec should count against it.
Will I need to buy extra accessories with either one?
Possibly with the Apex. Reviewers consistently note that the Apex 300's own panel is built around AC outlets and high-voltage connectors, with DC and USB output coming from a hub sold separately that they consider expensive for what it delivers. Budget for it if most of what you plug in is small. The F3800 doesn't have that gap, but its owners do report an input stage fussy enough to steer you toward Anker's own panels, which aren't cheap either.
Where to buy
Anker SOLIX F3800
$2,199.99
$2,199.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
BLUETTI Apex 300 + B300KPick
$2,599.00
$2,599.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.