Head-to-head test
BLUETTI AC300 + 4×B300 vs BLUETTI Apex 300 + 2×B500K
Buy the newer BLUETTI, not the cheaper one: the $94 you'd save picks the discontinued AC300 platform, where a failed head unit now means BLUETTI has no repair parts left and won't recommend fixing it.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
BLUETTI
AC300 + 4×B300
8,760Power Score · The AC & Fridge Zone
$5,596.00 · direct from BLUETTI
Last checked 6 days ago. Prices move — check before you buy.
BLUETTI
Apex 300 + 2×B500K
9,621Power Score · The AC & Fridge Zone
$5,399.00 · direct from BLUETTI
Last checked 6 days ago. Prices move — check before you buy.
Spec deltas
Two BLUETTI stacks, ninety-four dollars apart, and the cheaper one is the platform BLUETTI stopped making parts for. The AC300 + 4×B300 and the Apex 300 + 2×B500K are aimed at the same buyer, someone wiring roughly 12 to 13 kilowatt-hours into a house or a big rig, and priced within a rounding error of each other ($5,596 vs $5,690). Everything that matters is in what you get for that near-identical check.
What you get is a generation gap. The Apex is BLUETTI's newer architecture: 13,005Wh in 282 pounds, against the AC300's 12,288Wh in 367. That's more energy in 85 fewer pounds, which is what a denser battery platform buys you. The Apex also pushes 3,840W continuous to the AC300's 3,000W and hands over faster when the grid drops.
The AC300 is still a well-built machine. Owners liked the fit and finish and its roughly one-hour rechargeA1A4. But it's been discontinued, and the field reports that matter now are the ones about dead head units and 'no parts'A9A10. Buy the platform BLUETTI is still standing behind. This one isn't close.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
Neither of these is portable; at 282 and 367 pounds they're both install-once appliances. But the Apex hands you more capacity and more output in a body you can reposition without a second person, while the AC300 asks you to wrestle 85 extra pounds for less of everything.
AC300 + 4×B300: 367.2 lb for 12,288WhApex 300 + 2×B500K: 282.2 lb for 13,004.8WhApex continuous output 3,840W vs AC300 3,000W
Why it mattersAnyone who will ever move this box, repositioning it in a basement or loading it into an RV bay, has less to fight and more to show for it with the Apex.
The one platform where a dead head unit already means 'no parts, don't bother repairing'A9A10 is the same one you'd pick to save $94. A LiFePO4 pack rated for 9.6 years of daily cycling is worth nothing if the inverter bricks in year six and can't be repaired.
AC300 stack is $94 cheaper upfront ($5,596 vs $5,690)both rated 3,500 cycles, about 9.6 years of daily usethe AC300 is discontinued; a failed head unit brought a 'no repair parts, repair not recommended' reply from BLUETTIA9A10
Why it mattersAnyone keeping this past the 4-to-5-year warranty should treat repairability as the deciding spec and pick the platform BLUETTI still supports.
Over a three-day outage where the inverter idles between loads, that standing draw quietly subtracts from the capacity the spec sheet credited you withA2A3. Whether the Apex's newer inverter shares the habit isn't documented, since field data on the B500K bundle is thin, but the AC300's idle tax is measured, not theoretical.
AC300 draws around 60W at idle with the AC on and nothing plugged inA2owners measured roughly 8% of the pack gone after 4 hours idlingA3an 8-hour blackout draws only 16% of the AC300's 12,288Wh
Why it mattersFor always-on backup that mostly waits, the AC300's idle draw is a real deduction from its headline capacity; buyers who cycle hard and recharge often will barely notice it.
The specific dimensions that decide these two units — everything else is a tie.
PowerScore Breakdown
Selected because: Apex leads the composite 10,032 to 9,180 on more output and capacity at the same price; establishes it is simply more unit.
overall power score
The Apex posts a 10,032 PowerScore to the AC300's 9,180, and for once the composite isn't hiding anything: it's ahead because it genuinely moves more power. 3,840W continuous versus 3,000W means it starts and holds larger loads, the window AC or the 15-amp saw the AC300 might start but strain against.
In practice both clear every everyday scenario with room to spare, a weekend of camping draws about a fifth of either pack, so the score gap isn't about whether your fridge runs. It's about the ceiling on the day you ask for everything at once, and the Apex's ceiling is higher for the same money.
Portability & Form Factor
Selected because: The 85 lb gap (282 vs 367) is the most tangible difference; both immobile, but the Apex is far easier to site and reposition.
weight
Eighty-five pounds is the difference between these two, and it lands entirely on the AC300's side of the scale: 367 pounds of stack against 282. Neither number lets you call this portable. Both are two-person, mind-your-back installs you site once and leave, and the Apex ships without wheels, so plan on a cart either wayB11.
But 85 pounds is a real tax when you're deciding whether it lives in the garage or the basement, or fitting it into an RV bay. The Apex is the newer, denser pack: more watt-hours in the lighter body. The AC300 charges you 85 extra pounds for 717 fewer.
Lifetime Value
Selected because: Identical $0.13/lifetime kWh and a $94 sticker edge to the AC300, but discontinuation plus the 5-year warranty flip real-world value to the Apex.
cost / lifetime kWh
On paper this is a dead heat: both come out to $0.13 per lifetime kilowatt-hour, both rated for 3,500 cycles and about 9.6 years of daily use. Our calculator even hands the AC300 a narrow 'cheaper to own,' and it's right on the sticker, $5,596 against $5,690, a $94 gap you'd forget by the first charge.
Here's where the paper parity breaks. The AC300 is discontinued, and owners have started hitting the wall that ends every discontinued platform: a head unit fails, and BLUETTI's answer is that the parts no longer exist and repair isn't recommendedA9A10. Spread across warranty, the Apex is already the cheaper unit, $1,138 per covered year to the AC300's $1,399, and its coverage is the kind you might actually still be able to use. Ninety-four dollars is a poor reason to buy the box you can't fix.
What the Specs Don't Tell You
Selected because: Weight, the Apex's 45dB disclosure, UPS speed, and the AC300's undisclosed noise are the firing catches, and all point the same way.
Four flags fire here, and the notable part is that not one of them breaks toward the AC300. Weight is the biggest, both heavy, the Apex 85 pounds less of it. The two noise flags are really one story about disclosure: the Apex states its 45dB under load, the AC300 states nothing. The UPS flag is a real Apex advantage but a narrow one, since most gear rides through both handoff speeds.
Four catches, and the older platform doesn't win a single one of its own.
Strengths & trade-offs
BLUETTI AC300 + 4×B300
Strengths
- Solid all-rounder with standard specs.
Trade-offs
- –Significantly heavier (+85 lbs), making it harder to move.
- –Weaker inverter (-840W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI Apex 300 + 2×B500K
Strengths
- +Costs $197 less
- +Lighter by 85 lb
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Scoring these two at a campsite is a category error: the AC300 + 4×B300 at 367 lbs is not a take-along — it rolls off a truck bed if it travels at all, and the Apex 300 + 2×B500K at 282 lbs is not a take-along — it rolls off a truck bed if it travels at all. The 2,100Wh 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 Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Either unit
Eight hours of outage barely dents either one, 16% out of the AC300 and 15% out of the Apex, so this isn't a capacity contest. It's a handoff contest, and the Apex takes it: it switches over in under 10 milliseconds on a line-interactive design, against the AC300's under-20 standby. Most gear rides through both, but if a desktop or a NAS is what you're guarding at 2 a.m., the faster, cleaner cutover is the one to want.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
Either unit
A CPAP is about 40W for eight hours, so both cover the night with room to spare and capacity decides nothing. Fan noise would — but AC300 + 4×B300 doesn't publish a figure, so there's nothing to hold it to. Buy on price, weight, and whether you can live with a fan you haven't heard.
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: the AC300 + 4×B300 at 367 lbs is not a take-along — it rolls off a truck bed if it travels at all, and the Apex 300 + 2×B500K at 282 lbs is not a take-along — it rolls off a truck bed if it travels 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
Either unit
Both stacks swallow a full off-grid day and still show better than half a tank, the AC300 using about 45% of its pack, the Apex about 42%. Capacity is effectively a tie here, so the tiebreak is what it's like to live with: the Apex is 85 pounds lighter to bolt into a rig and rides on BLUETTI's current platform. For van and RV life, lighter and still-supported wins a race that runtime calls even.
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 + 2×B500K runs 53.9h vs 51h.
$5,399 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 0–736.9hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–147.4hHigh-Draw Appliances
These reveal the real limitsscale 0–11.1h¹ 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 18, 2026
Verdict: the Apex 300 + 2×B500K
Take the Apex 300 stack. For $94 more it gives you more capacity (13,005Wh vs 12,288Wh), more continuous output (3,840W vs 3,000W), a fifth year of warranty, a faster UPS handoff, and 85 fewer pounds to live with, all on BLUETTI's current, still-supported platform. Our lifetime calculator flags the AC300 as the cheaper unit to own, and that's true on the sticker; both land at the same $0.13 per lifetime kilowatt-hour. But the AC300 is discontinued, and owners already report head units failing with no repair parts availableA9A10, so the cheaper box is the one you can't fix. Per warranty year the Apex is actually the cheaper of the two ($1,138 vs $1,399).
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 18, 2026. The links below open BLUETTI's current price.
$5,399.00 · direct from BLUETTI
Last checked 6 days ago. Prices move — check before you buy.
or check the AC300 + 4×B300 price$5,596.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 18, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, AC300 + 4×B300 rates 3.3/5 (1st percentile of 29 Whole-Home / Off-Grid-class units), and Apex 300 + 2×B500K rates 3.5/5 (14th percentile of 29 Whole-Home / Off-Grid-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Neither is portable; one is just less immobile
Call these what they are, install-once appliances. The AC300 stack is 367 pounds, the Apex 282, and both are two-person, mind-your-back lifts you site and leave. The 85-pound gap doesn't make the Apex portable; it makes it the one you can reposition without recruiting help and regretting it.
The Apex's 45dB is its honest worst case
That 45dB rating is the Apex under heavy load, about the hum of a quiet office, and only when you're pulling real watts through it. Running a CPAP or a router, it sits well below that. It's a number worth knowing precisely because the unit it's up against never published one.
A real UPS edge, and a narrow one
The Apex hands over in under 10 milliseconds on a line-interactive design; the AC300 takes under 20 on standby. For a desktop, a router, most of what people plug into a UPS, both are invisible, since 20 milliseconds doesn't reboot a PC. Treat the Apex's faster cutover as insurance for genuinely switchover-sensitive gear, not as a reason on its own.
Warranty Comparison
The Apex 300 + 2×B500K is covered for 5 years against the AC300 + 4×B300's 4 years. An underrated factor if you're keeping this unit for years.
The AC300's noise spec is a blank
BLUETTI publishes no decibel figure for the AC300, while the Apex is on record at 45dB under load. An undisclosed number isn't automatically a loud one, but it's one you can't check against your bedroom before the box arrives. When one unit tells you and the other doesn't, that asymmetry is itself information.
Full record above — the Test Desk pick is the Apex 300 + 2×B500K.
Check Apex 300 + 2×B500K price →or check the AC300 + 4×B300 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 ($0.13/kWh vs $0.12/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off. One thing to know reading the table: both carry the same 3,500-cycle rating, so the lifetime rows are sticker price and capacity in disguise — the wear horizon is identical and decides nothing here.
Growth path
AC300 + 4×B300
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 12,288Wh.
Accepts up to 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.
Apex 300 + 2×B500K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 13,005Wh.
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.
BLUETTI AC300 + 4×B300
This is a mature, heavily reviewed platform, so the field record runs deep. Owners were impressed by the build quality and clever design out of the boxA1, and the recharge speed earns real praise, one owner clocked near-empty to full in just over an hourA4. On noise the consensus is audible but quiet for its size: you hear air movement, not motor whine, and most forget it's runningA5A6. One reviewer's fridge ran for about a day and a quarter on a single chargeA11. Read all of this as platform-level evidence, though, it describes the AC300 and B300 generally, not this specific four-battery stack.
Two warts recur, and one is structural. Owners consistently flag a high idle draw, around 60W with the AC on and nothing connected, enough to eat roughly 8% of the pack over four idle hoursA2A3, which matters for a unit that mostly waits in standby. The companion app draws steady complaints as basic and sometimes unable to connectA7A8. The structural one: the AC300 is discontinued. One owner's head unit failed outright, and BLUETTI's own reply was that no repair parts remain and repair isn't recommendedA9A10. On a $5,596 box you mean to keep a decade, that policy is the sentence that should stop you.
“I was immediately impressed with the unit's quality, finish, and clever design.”
Sources
reviewed.com
BLUETTI Apex 300 + 2×B500K
Field data on this exact Apex 300 + 2×B500K bundle is thin. It's a recent, niche configuration, and most hands-on reviews test the Apex 300 with the older B300K battery insteadB1B8B9, so read the Apex evidence as platform-level. Within that limit the reads are positive: the fans are described as relatively tame, not the small-jet-engine howl some big units makeB1, and testers found it ran household essentials well past a full day without rationingB8. One genuine B500K owner turned up running the pairing on a 50-amp fifth wheel, which is exactly the heavy-rig job this stack is built forB10.
The recurring knock is the port layout. To get USB and DC ports on the Apex you add a separate powered hub, and to run two units in parallel you buy another box on top of that, which reviewers call flexible but pricey next to rivalsB2B6B7. The plugs also sit under rubber bungs that fight oversized adaptersB5, and like the AC300 it ships without wheelsB11. What's missing from the record is telling: nobody has reported multi-month longevity, cold-weather behavior, or firmware history for the B500K bundle yet, so its one real open question, does it age as well as it specs, is still unanswered.
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Sources
techspective.net · thesolarlab.com · t3.com · trustedreviews.com · notebookcheck.net
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Idle power draw is noticeably higher than expected and drains meaningful battery even with no connected load. [AC300 + 4×B300 · 2 entries]
- Reviewers and owners consistently describe the AC300's fan as audible under load but notably quiet for its size and class. [AC300 + 4×B300 · 2 entries]
- The companion app is described as basic/limited, and some owners report Bluetooth or app-pairing problems connecting to the AC300+B300. [AC300 + 4×B300 · 2 entries]
- After several years of service, some head units fail outright, and once discontinued Bluetti has no repair parts and does not recommend repairing out-of-warranty units. [AC300 + 4×B300 · 2 entries]
- Reviewers consistently note the lack of built-in USB/DC ports, requiring a separate $300 Hub D1 accessory, as a notable and costly design compromise. [Apex 300 + 2×B500K · 3 entries]
- The unit's extreme weight (~85 lbs base, more with expansion batteries) makes it effectively immobile once placed, despite being marketed as 'portable.' [Apex 300 + 2×B500K · 3 entries]
- The modular ecosystem (Hub A1, Hub D1, expansion batteries) is praised for flexibility but criticized for high add-on costs relative to competitors. [Apex 300 + 2×B500K · 3 entries]
- A1
“I was immediately impressed with the unit's quality, finish, and clever design.”
Clean Energy Reviews Forum — "Bluetti Power Station Review (AC300) Off-grid Backup" (user Svarky) · 2023-07 · [positive]
- A2
“When the AC output is switched on, the idle power draw (with no load) appears to be close to 60W, which is high.”
Clean Energy Reviews Forum — "Bluetti Power Station Review (AC300) Off-grid Backup" (user Svarky) · 2023-10 · [negative]
- A3
“When left on for 4 hours with no load, it consumed around 8% of the battery, which was rather surprising.”
Clean Energy Reviews Forum — "Bluetti Power Station Review (AC300) Off-grid Backup" (user Svarky) · 2023-10 · [negative]
- A4
“It still charges the battery from near empty to 100% in just over one hour, which is very good.”
Clean Energy Reviews Forum — "Bluetti Power Station Review (AC300) Off-grid Backup" (user Svarky) · 2023-10 · [positive]
- A5
“The AC300 + B300 has a little bit of noise coming from the fan. It's NOT silent. But considering the size and use case... you'll forget it's there.”
GreenCitizen — "Bluetti AC300 + B300 Power Station Review: Real-Life Lab Test Results" · 2025-01 · [positive]
- A6
“The powered fans within my AC300 units are extremely quiet when running – no detectible motor or bearing noise; only air movement is slightly heard.”
DIY Solar Power Forum — "Fan noise level of Bluetti AC200MAX?" thread (AC300 owner's comparison reply) · unknown · [positive]
- A7
“The companion app brings basic functionality to your fingertips but leaves you longing for more.”
GreenCitizen — "Bluetti AC300 + B300 Power Station Review: Real-Life Lab Test Results" · 2025-01 · [negative]
- A8
“App (v3.0.1) keeps loading indefinitely even when the AC300 itself shows it is "Connected."”
BLUETTI Community forum — "AC300+B300 doesn't connect to Bluetti App" thread · unknown · [negative]
- A9
“I just had my AC300 head unit fail with a007 App error, and 00 006 and 01 006 errors on the console screen and 2 days later.... click click click.. DEAD.”
DIY Solar Power Forum — "Bluetti - Screw you - AC300 dead and no parts to fix it anymore 5 years after launch" · 2026-03 · [negative]
- A10
“Due to the AC300 being discontinued, they don't have the necessary parts for repairs. Considering the repair costs and round-trip shipping fees, we don't recommend repairing it.”
DIY Solar Power Forum — "Bluetti - Screw you - AC300 dead and no parts to fix it anymore 5 years after launch" (Bluetti support reply relayed by OP) · 2026-03 · [negative]
- A11
“The Bluetti AC300 + B300 combo kept the fridge running for an average of 31 hours on a charge.”
Forbes — Brad Moon, "Review: Bluetti AC300 + B300 Home Battery Backup System" · 2023-10 · [positive]
- B1
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [positive]
- B2
“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.net — Bluetti Apex 300 with B300K Review · 2025-09 · [negative]
- B5
“Each is protected by a rubber bung... It can be annoying when it comes to inserting oversized plugs or adaptors, though.”
trustedreviews.com — Bluetti Apex 300 Review · 2025-10 · [negative]
- B6
“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 · unknown · [negative]
- B7
“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.com — Bluetti Apex 300 Review · unknown · [negative]
- B8
“With some portable power stations, I'd have to ration power more carefully, but with this system, I could run essentials for more than a full day if I needed to.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [positive]
- B9
“It's heavy, no question, but the handles and modular battery design make it manageable. I wouldn't drag it to a picnic, but it's a solid choice for home backup”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [mixed]
- B10
“I recently purchased a Bluetti Apex 300 with a B500K expansion battery to help power our 50A Brinkley 5th wheel.”
BLUETTI Community forum — 'Apex 300 operating mode and settings?' · 2026-02 · [positive]
- B11
“No wheels though, so if you plan on moving it regularly, invest in a cart.”
thesolarlab.com — Bluetti Apex 300 Review · unknown · [negative]
Research compiled July 18, 2026.
Who Should Buy Which
Buy the AC300 + 4×B300 if you…
- →You already own AC300 gear, a head unit or a couple of B300 batteries, and want to grow the system you've got. Staying in-platform means expanding what you already live with rather than buying into the discontinuation fresh.
- →You find it discounted well below the Apex, not $94 under but a real gap, and you accept that out-of-warranty repair may not be possibleA9A10. The hardware is good; the support runway is short.
Buy the Apex 300 + 2×B500K if you…
- →You're buying fresh at this tier for home or big-rig backup and want the unit BLUETTI is still supporting, with the longer warranty and the lighter, denser pack.
- →You're powering an RV or a heavy off-grid daily load, the kind that actually uses a chunk of 13,005Wh like the 50-amp fifth-wheel setup one owner runsB10, and you want current-platform parts availability behind it.
- →You'll add USB and DC ports through the hub accessory without flinchingB2B6, and you'd rather site the box once than move it often.
If neither fits
If your real need is any of the everyday jobs, a weekend of camping (about 2,100Wh), an eight-hour blackout (around 1,645Wh), a CPAP overnight (roughly 320Wh), you're looking at 12 to 13 kilowatt-hours to use a sixth of it or less. That's paying about $5,600 for headroom you'll never touch. Buy a 2-to-3kWh unit at a third of the price and pocket the difference; step up to these only when a daily off-grid load or whole-home backup genuinely needs the capacity.
The Bottom Line
Same brand, same job, same money, and only one of them is a platform BLUETTI still stands behind. The Apex 300 + 2×B500K gives you more capacity and more output in 85 fewer pounds, holds its warranty a year longer, and, unlike the discontinued AC300, can still be repaired when something eventually failsA9A10.
The AC300 saves you $94 and is a genuinely well-built machine, right up until the day its head unit dies and the parts don't exist. Buy the one you can still fix. Take the Apex.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI AC300 discontinued?
Yes. It's an older platform BLUETTI no longer produces, and owners report reaching out about failed head units only to be told no repair parts remain and repair isn't recommended. The hardware itself is well-regarded and runs fine; the risk is entirely about what happens if it breaks after the 4-year warranty. The Apex 300 is the current platform.
Why does the AC300 stack weigh more than the Apex if it holds less power?
Different battery generations. Four B300 packs total 367 pounds for 12,288Wh, while two newer B500K packs hit 13,004.8Wh at 282 pounds, 85 pounds less for slightly more energy. Denser cells are most of why the Apex is the easier unit to live with.
Does the BLUETTI Apex 300 have USB ports built in?
Not on the main unit. You add USB and DC ports through a separate powered hub accessory, which reviewers flag as an extra cost to budget for. The AC300, by contrast, has its USB ports built in. If you run a lot of USB devices straight off the station, factor the hub into the Apex's real price.
Which one is actually cheaper?
The AC300 is $94 less on the sticker ($5,596 vs $5,690), and a pure cost-to-own calculation gives it a hair's-edge win, since both land at $0.13 per lifetime kilowatt-hour. But the Apex carries a fifth year of warranty, making it cheaper per covered year ($1,138 vs $1,399), and it's the platform you can still get parts for. Ninety-four dollars up front is the wrong thing to optimize here.
Can I expand either system later?
Both accept additional BLUETTI batteries, so neither locks you out of adding capacity beyond their roughly 12-to-13kWh starting point. Expansion isn't a tiebreaker between these two. Decide on weight, warranty, and, most of all, which platform is still supported.
Where to buy
BLUETTI AC300 + 4×B300
$5,596.00
$5,596.00 · direct from BLUETTI
Last checked 6 days ago. Prices move — check before you buy.
BLUETTI Apex 300 + 2×B500KPick
$5,399.00
$5,399.00 · direct from BLUETTI
Last checked 6 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.