Head-to-head test
BLUETTI AC500 + 2×B300K vs BLUETTI Apex 300 + B300K
Same 5,530Wh, same 3,500 cycles, same brand. The Apex 300 + B300K does it for $700 less, 47 lb lighter, and with a 5-year warranty the AC500 stack doesn't carry — so the only reason to pay up for the AC500 is its higher output ceiling of 5,000W against 3,840.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
BLUETTI
AC500 + 2×B300K
5,894Power Score · The AC & Fridge Zone
$3,948.00 · direct from BLUETTI
Last checked 22 days ago. Prices move — check before you buy.
BLUETTI
Apex 300 + B300K
6,017Power Score · The AC & Fridge Zone
$2,599.00 · direct from BLUETTI
down from $2,799 · 7% below usual
Last checked 6 days ago. Prices move — check before you buy.
Spec deltas
These two stacks hold the same energy. The AC500 + 2×B300K and the Apex 300 + B300K both land at roughly 5,530Wh on the same 3,500-cycle LFP cells, from the same company — so this isn't a battery fight, it's a chassis-and-price fight, and the Apex wins it by $700.
The Apex 300 is BLUETTI's newer architecture, and it shows up in the numbers that aren't capacity. It's 47 lb lighter (149 against 196), it carries a 5-year warranty where the AC500 stack lists none, and it settles onto grid power as a line-interactive UPS under 10ms rather than the AC500's standby-class 20. At $2,599 against $3,299, it's also the cheaper unit to own over its life: $0.13 per lifetime kWh to the AC500's $0.17.
The AC500 keeps one genuine advantage, and it's worth naming before you write it off. Its inverter runs 5,000W continuous with a 10,000W surge; the Apex does 3,840W and 7,680W. Central air conditioners and well pumps draw two to three times their rated wattage at the instant they start, and that surge headroom is exactly where a 10,000W inverter starts a motor a 7,680W one refuses to. If your backup list includes a compressor that big, the AC500 earns its premium. If it doesn't, you're paying $700 for watts you'll never call on.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Usually the bargain box costs you later in cycles or capacity; here the Apex is $700 less up front, holds the same energy on the same 3,500-cycle cells, and still comes out ahead on cost-to-own at $0.13 per lifetime kWh. The 5-year warranty is pure upside on top of a lower price.
Apex 300 + B300K is $2,599 vs AC500 + 2×B300K at $3,299Apex carries a 5-year warranty; the AC500 stack lists noneApex costs $0.13 per lifetime kWh vs the AC500's $0.17
Why it mattersA buyer choosing on value has no reason to reach for the AC500 — the Apex is cheaper twice over.
continuous output
With capacity, chemistry, and cycle life effectively identical, the entire $700 gap resolves to one thing: the AC500's bigger inverter. That money buys 1,160W more continuous output and a 2,320W bigger surge — meaningful only if a startup surge on the page actually needs it.
Power scores land at 6,612 (AC500) and 6,552 (Apex) — within 60 pointsBoth stacks hold about 5,530Wh on 3,500-cycle cellsAC500 inverter: 5,000W / 10,000W surge vs Apex 3,840W / 7,680W
Why it mattersMatch the premium to a real load. Running a 3-ton AC or a well pump, pay it; running a fridge, a router, and lights, don't.
Forty-seven pounds is a real break when you're sliding a stack across a garage or into an RV bay, and it tilts every repositioning job toward the Apex. But at 149 lb it's still a two-person lift or a wheeled oneB14 — 'lighter' here means less immovable, not movable.
Apex + B300K is 149 lb vs AC500 stack at 196 lb — 47 lb lighterStacked, the Apex still weighs enough that reviewers call it too heavy to carry aloneB14Both ship with handles; a trolley is optionalB5
Why it mattersIf the unit gets relocated even occasionally, the Apex's 47-lb advantage is worth having; if it never leaves one spot, it's a wash.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: Apex is $700 cheaper up front and cheaper to own — the core of the verdict.
cost / lifetime kWh
The Apex 300 + B300K is the rare unit that's cheaper to buy and cheaper to keep. Its $2,599 sticker undercuts the AC500 stack by $700, and because both run the same 3,500-cycle LFP cells at the same roughly 5,530Wh, the Apex delivers the same lifetime energy for less money. That's how it lands at $0.13 per lifetime kWh against the AC500's $0.17.
The warranty widens the gap rather than closing it. The Apex carries five years of coverage; the AC500 stack lists none on our spec sheet, which on a $3,299 purchase is not a small blank to leave. You're being asked to pay more for the unit and take on more risk at the same time. Unless the AC500's inverter is doing something you specifically need, the value case is one-sided.
PowerScore Breakdown
Selected because: Composite is a near-tie; the AC500's only lead is inverter output, which this section frames.
overall power score
Our composite scores these two 60 points apart — 6,612 for the AC500, 6,552 for the Apex — which in a system this size is a rounding error. Same capacity, same cells, same cycle life; the score barely moves because almost nothing about the batteries is different.
What separates them is the inverter, and it's the AC500's one clean win. It pushes 5,000W continuous to the Apex's 3,840, and surges to 10,000W against 7,680. That 2,320W surge cushion is the whole argument for the AC500: motors on central air and well pumps spike well past their running draw at startup, and the bigger inverter is the one that starts them without tripping. Buy the AC500 for that specific reason or don't buy it at all — the battery underneath is the same one the Apex already gave you for $700 less.
Portability & Form Factor
Selected because: 47 lb and the UPS-speed/noise differences are the Apex's everyday edge.
weight
At 149 lb the Apex is 47 lighter than the 196-lb AC500 stack, and if this thing ever moves, that's the number you'll feel. It's the difference between a two-person shuffle and a one-person-with-a-trolley shuffle — still not something you carry to a tailgate, but noticeably easier to reposition in a garage, a basement, or an RV bay.
The Apex also edges the AC500 on the quiet, everyday details. It settles onto grid power as a true line-interactive UPS under 10ms, a hair quicker than the AC500's standby-class 20, and it discloses a 45 dB load rating where the AC500 publishes no figure at all. Neither difference is dramatic, but they both point the same way: the newer chassis is the more livable one.
What the Specs Don't Tell You
Selected because: UPS class, Apex's disclosed 45 dB, the AC500's undisclosed noise, and the Hub D1 port caveat all live here.
The one catch that could bite an Apex buyer is ports. Reviewers found the base unit leans on its high-voltage and AC connectors and skimps on the small stuff — one tester pulled just 8W of USB-C charging and wanted a proper 100W or 140W portB6 — so if you need a full DC and USB array you're adding the Hub D1 accessory and its costB1B2. Price that in before you pocket the whole $700.
On the AC500 side, the honest flag is disclosure: it publishes no load noise figure, while the Apex owns a 45 dB rating. Field reports on the AC500 platform describe a fan that's intermittent but audible under loadA10 and indicator lights bright enough that owners warn against keeping it in a bedroomA11. Neither unit is silent; only one of them tells you how loud it gets.
Strengths & trade-offs
BLUETTI AC500 + 2×B300K
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$1,349) than the Apex 300 + B300K.
- –Significantly heavier (+47.3 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI Apex 300 + B300K
Strengths
- +Costs $1,349 less
- +Lighter by 47.3 lb
- +Longer warranty
Trade-offs
- –Weaker inverter (-1,160W) 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
Scoring these two at a campsite is a category error: the AC500 + 2×B300K at 196 lbs is not a take-along — it rolls off a truck bed if it travels at all, and the Apex 300 + B300K at 149 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
An eight-hour outage draws about 1,645Wh, roughly a third of either stack — both ride it out with two-thirds of the pack still in reserve. Capacity isn't the deciding factor at this load, so the tiebreak is the Apex's faster line-interactive switchover and its warranty versus the AC500's surge headroom for anything large that kicks on mid-outage.
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 AC500 + 2×B300K 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 AC500 + 2×B300K at 196 lbs is not a take-along — it rolls off a truck bed if it travels at all, and the Apex 300 + B300K at 149 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
A full off-grid day here runs about 4,685Wh, and both stacks cover it on effectively identical ~5,530Wh capacity — right at the edge of usable energy, with little to spare on either. This one's a dead heat by design, since the batteries are the same; break it on price, where the Apex saves you $700, or on the AC500's inverter if your daily loads include a big motor.
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
Dead heat — both run this 205W load for roughly 22.9h. Pick on price, weight, or ports.
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 0–313.4hComfort & 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
July 18, 2026
Verdict: the BLUETTI Apex 300 + B300K
The Apex 300 + B300K matches the AC500 + 2×B300K on the two specs that usually decide a stack this size — about 5,530Wh of capacity and 3,500 LFP cycles — then wins everywhere value lives. It's $700 cheaper ($2,599 vs $3,299), 47 lb lighter (149 vs 196), carries a 5-year warranty where the AC500 stack lists none, and catches an outage a touch faster (line-interactive under 10ms vs standby under 20ms). Its cost-to-own lands at $0.13 per lifetime kWh against $0.17. The AC500's real card is muscle: 5,000W continuous and a 10,000W surge against 3,840W and 7,680W — the headroom to start a central AC or a deep well pump the Apex could stall on. If you need that ceiling, pay for it. For a home-backup buyer who won't, the Apex is the same battery for $700 less. One honest catch on the Apex: reviewers found its base port layout awkward and USB-C output weak, so budget for the Hub D1 accessory if you want a full set of portsB1B6.
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.
$2,599.00 · direct from BLUETTI
down from $2,799 · 7% below usual
Last checked 6 days ago. Prices move — check before you buy.
or check the AC500 + 2×B300K price$3,948.00 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
Not rated for both units (minimum threshold unmet): Solar Generator.
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, AC500 + 2×B300K rates 4.1/5 (47th percentile of 16 Home Backup-class units), and Apex 300 + B300K rates 4.2/5 (53rd 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.
Weight Reality Check
Neither unit is grab-and-go. The Apex 300 + B300K (148.8 lbs) is a two-person lift. The AC500 + 2×B300K (196.1 lbs) is firmly a two-person lift. It goes where you put it and stays there. That's a 47 lb difference, which you'll feel every time you relocate.
Apex 300 + B300K: 45dB Under Load
45dB is about as loud as a running refrigerator. The AC500 + 2×B300K publishes no figure to compare it against, which cuts both ways. For most people, fan noise around 45dB and up is where sleep starts to suffer.
Standby vs Line-Interactive: A Few Milliseconds
The Apex catches an outage as a line-interactive UPS under 10ms; the AC500 does it standby-class under 20. For a desktop, a router, or most home electronics, both are fast enough that nothing blinks. The gap only matters for genuinely switchover-sensitive gear, and even there it's a narrow edge to the Apex — worth noting, not worth deciding on alone.
One Unit Tells You How Loud It Gets
The Apex publishes a 45 dB load rating. The AC500 stack publishes nothing, and field reports describe a fan that's intermittent but clearly audible under load, plus indicator lights bright enough that owners keep it out of the bedroom. Neither is silent. The difference is that with the Apex you know the number going in; with the AC500 you find out after it's on your shelf.
Full record above — the Test Desk pick is the Apex 300 + B300K.
Check Apex 300 + B300K price →or check the AC500 + 2×B300K 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 Apex 300 + B300K wins on both sticker price and long-term value. At $0.14/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner. 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
AC500 + 2×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 3,000W 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.
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.
BLUETTI AC500 + 2×B300K
The AC500 platform's field record carries a real quality-control asterisk. One review outfit had both an AC300 and an AC500 test unit arrive with the battery powering on but the inverter dead — effectively dead on arrivalA7 — and a named owner's install log opens with BLUETTI having forgotten to ship the cable linking the main unit to the battery, sorted only after a support callA6. Buy from a seller with a clean return path.
Once it's running, owners are largely content. One called it near-flawless from day one with an easy setup and a nice monitoring appA12; another was happy and found it quieter than his previous Pecron unitA1. The recurring gripe is the readout: the display shows battery percentage but no time-to-empty and no voltageA2, which owners moving up from EcoFlow or Pecron notice immediately. One caveat on the evidence itself — no long-term review of the exact two-battery stack exists yet, so these notes describe the AC500 paired with a single B300K, the same base platform wired one-to-one instead of one-to-two.
“So far pretty darn happy, and it's much quieter than the small Pecron E1500LFP I have.”
Sources
firewoodhoardersclub.com · thesolarlab.com · freshlycharged.com · diysolarforum.com
BLUETTI Apex 300 + B300K
The Apex 300 is new enough that its record is mostly professional test units rather than years of owners, so read it as early days. Within that, the reviews are strong: one tester called it one of the few systems he's used that could genuinely replace a generator without the noise or fumesB4, and an Australian test ran a full washer cycle that pulled the pack from 100% to 65% in an hour, then a heat-pump dryer that took it to 20% over another 90 minutesB9B10 — real heavy-appliance work, handled.
Two honest notes recur. The base unit's port situation is thin — reviewers flag missing USB/DC ports and a paid Hub D1 to restore themB1B2, plus that weak 8W USB-C resultB6 — and the weight is no joke: stacked, it's near 150 lb and, as one reviewer put it, too big and heavy for most people to carry aloneB14. It arrives well-packed and undamagedB8, but plan the lift.
“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
- Multiple sources report AC500 units arriving with hardware faults — a dead inverter or a missing battery-link cable — that required contacting Bluetti support. [AC500 + 2×B300K · 2 entries]
- Fan noise is intermittent but noticeable during charging/heavy load across sources, though one owner found it quieter than a competing unit. [AC500 + 2×B300K · 2 entries]
- The app covers the basics but owners want more detail (time-remaining, battery voltage), and the unit lacks a hard-reset option to recover from glitches. [AC500 + 2×B300K · 2 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
“So far pretty darn happy, and it's much quieter than the small Pecron E1500LFP I have.”
firewoodhoardersclub.com — jtakeman, "Bluetti AC500 w/B300K battery for our home backup/supplement system install and review" · 2025-02 · [positive]
- A2
“One other odd thing — it doesn't have a time-of-charge-remaining readout like my EF or Pecron units, just battery percentage. They don't even display battery voltage.”
firewoodhoardersclub.com — jtakeman, AC500 w/B300K install and review thread · 2025-02 · [negative]
- A6
“Got a hold of Bluetti support — seems they forgot to ship the cable connecting the main unit to the battery.”
firewoodhoardersclub.com — jtakeman, AC500 w/B300K install and review thread · 2025-02 · [negative]
- A7
“Both the AC300 and AC500 we tested had issues where the battery would turn on but not the inverter itself — dead on arrival, essentially.”
thesolarlab.com — Bluetti AC500 Review: Pros, Cons & the Ugly Truth · unknown · [negative]
- A10
“The fan can get loud, though it's only intermittent and doesn't run constantly.”
freshlycharged.com — Powering A Room with Solar: Bluetti AC500 & B300K Review · unknown · [mixed]
- A11
“The indicator lights are quite bright and remain on all the time, so it's best not to keep the AC500 in a room where you'll be sleeping.”
freshlycharged.com — Powering A Room with Solar: Bluetti AC500 & B300K Review · unknown · [negative]
- A12
“Performed near flawlessly from day one, with easy-to-understand setup and a nice app for monitoring.”
diysolarforum.com — "Bluetti ac 500" owner thread · unknown · [positive]
- 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]
- B8
“Double-boxed, with handles, straps and plenty of foam, the unit arrived safely and without a scratch.”
digitalreviews.net — Bluetti B300K Expansion Battery Review · 2025-12 · [positive]
- 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]
- 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 July 18, 2026.
Who Should Buy Which
Buy the AC500 + 2×B300K if you…
- →You're starting a central AC, a well pump, or a big motor load — the 10,000W surge and 5,000W continuous clear what the Apex's 7,680W might stall on.
- →You want the built-in port array without buying an add-on hub — the AC500 doesn't send you shopping for a Hub D1 to get your DC and USBB1.
- →You're expanding a bigger AC500-family system later and want the higher-output inverter as the hub.
Buy the Apex 300 + B300K if you…
- →You're choosing on value — $700 less up front, the same 5,530Wh, and a lower $0.13 per lifetime kWh.
- →You want the warranty — five years of coverage against the AC500 stack's none.
- →The unit gets repositioned — 47 lb lighter is a real break every time it moves, even if neither is truly portableB14.
If neither fits
If you need true whole-home coverage — 240V split-phase, a bigger daily budget than 5,530Wh, or a decade-long warranty — both of these are one size too small, and a DELTA Pro Ultra-class system is the honest starting point. And if you wanted something you actually carry, stop here: these are 149-to-196-lb fixtures that live where you set them, not power stations you sling into a trunk.
The Bottom Line
Same battery, same brand, $700 apart. The Apex 300 + B300K holds the same 5,530Wh on the same 3,500-cycle cells as the AC500 + 2×B300K, then beats it on price, weight, warranty, and cost-to-own — a clean value win that our composite, scoring the two within 60 points, quietly confirms.
The AC500 keeps exactly one reason to exist next to it: a 5,000W inverter with a 10,000W surge, the headroom to start a central AC or well pump the Apex might stall on. Buy it for that and nothing else. If your backup list is fridges and routers rather than compressors, take the Apex, keep the $700, and enjoy the warranty the AC500 doesn't come with.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
BLUETTI AC500 + 2×B300K or Apex 300 + B300K — which is the better buy?
For most people, the Apex 300 + B300K. It holds the same 5,530Wh on the same 3,500-cycle cells, costs $700 less, weighs 47 lb less, and adds a 5-year warranty the AC500 stack doesn't list. Choose the AC500 only if you need its higher output — 5,000W continuous and a 10,000W surge — to start a large motor load like central air or a well pump.
Why does the pricier AC500 cost less per lifetime kWh than I'd expect against the Apex?
It doesn't — the Apex is cheaper to own. Both stacks deliver essentially the same lifetime energy because they share capacity, chemistry, and 3,500-cycle life, so the lower-priced unit wins on cost-to-own. The Apex lands at $0.13 per lifetime kWh against the AC500's $0.17.
What do I give up by choosing the cheaper Apex 300?
Inverter headroom and a full built-in port set. The Apex runs 3,840W continuous and surges to 7,680W, below the AC500's 5,000W and 10,000W, so a very large motor startup is the one thing it might not handle. Its base unit is also light on USB/DC ports and pairs with a paid Hub D1 accessory if you need them.
Are these actually portable?
Not in any real sense. The Apex stack is about 149 lb and the AC500 stack about 196; both are two-person or wheeled lifts that reviewers say are too heavy to carry alone. The Apex's 47-lb advantage matters for repositioning around a home or RV, but treat either as a fixture, not a carry.
Does the AC500's higher wattage matter for normal home backup?
Only if your loads are big. For a fridge, router, lights, and laptops, the Apex's 3,840W is plenty of room. The AC500's 5,000W continuous and 10,000W surge earn their keep on hard-starting motors — a 3-ton central AC or a deep well pump — where the extra surge is the difference between the compressor starting and the inverter tripping.
Where to buy
BLUETTI AC500 + 2×B300K
$3,948.00
$3,948.00 · direct from BLUETTI
Last checked 22 days ago. Prices move — check before you buy.
BLUETTI Apex 300 + B300KPick
$2,599.00
$2,599.00 · direct from BLUETTI
down from $2,799 · 7% below usual
Last checked 6 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.