Head-to-head test
BLUETTI AC500 + 2×B300K vs BLUETTI Apex 300
Whether a single day of yours needs more than 2,350Wh of usable energy, because that is the only question the AC500 stack's extra $2,249 answers, and the Apex 300 delivers energy at half its cost per lifetime kilowatt-hour.
Full profiles: BLUETTI AC500 + 2×B300K → · BLUETTI Apex 300 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The AC500 + 2×B300K holds twice the Apex 300's battery, 5,530Wh against 2,764.8Wh, and will deliver about 17% more energy before the cells fade. The Apex 300 is rated for 6,000 cycles where the stack is rated 3,500, and capacity times cycles is what a battery actually sells you: 19,355 kWh against 16,589.
So the stack's case has to be the one thing the Apex 300 cannot do, and there is one. A van-life day of 4,685Wh leaves the Apex 300 2,335Wh short, about half the day dark, while the stack covers it. If your every day looks like that, the price argument stops mattering and you buy the capacity.
Most of the rest tilts the other way, and mostly it tilts on weight. 83.78 lbs is a bad lift. 196.1 lbs is furniture. The Apex 300 is also rated ≤10ms on UPS switchover against the stack's ≤20ms, and it is the only one of the two that publishes a noise figure at all. Unless your day is bigger than 2,350Wh usable, take the Apex 300 and keep the difference.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
Price that sliver and the value argument collapses. The $2,249 the stack costs above the Apex 300 buys 2,766 kWh of extra lifetime energy, which works out to about 81 cents a kilowatt-hour, against the ten cents a lifetime kilowatt-hour the Apex 300 charges across its whole life. You are paying roughly eight times the going rate for the top-up.
AC500 + 2×B300K: $3,948, 5,530Wh, rated 3,500 cycles minimumApex 300: $1,699, 2,764.8Wh, rated 6,000 cycles minimumRated lifetime energy: 19,355 kWh for the stack, 16,589 kWh for the Apex 300
Why it mattersIf you are buying total energy over years rather than one specific big day, buy the Apex 300. The stack's premium never pays itself back.
A day that uses the whole pack is a full cycle every day, and full cycles are exactly what turn 3,500 of them into 9.6 years. The scenario that justifies the stack is also the scenario that consumes it fastest, and it leaves nothing in hand for a cloudy week or a second laptop.
Van Life Daily models a 4,685Wh dayAC500 + 2×B300K: 4,701Wh usable after the flat 85% derate we apply to every unit, finishing at 100% used with 16Wh leftApex 300: 2,350Wh usable, 2,335Wh short of that same day3,500 rated cycles at one cycle a day is 9.6 years
Why it mattersFull-time van and off-grid buyers at that draw should budget a third B300K from the start instead of treating the two-battery stack as sufficient.
That reframes the capacity advantage as conditional. The stack loses both travel scenarios while holding thousands of watt-hours in reserve, because the loads it cannot reach are the ones at the far end of a driveway. Capacity that cannot get to the trip is not in the comparison for that trip.
196.1 lbs against 83.78 lbs, a 112 lb differenceOne reviewer could barely carry the Apex 300 a few feet and could not lift it onto a tableB8Weekend Camping and Tailgate Party both go to the Apex 300 while the stack sits on 2,601Wh and 4,031Wh of unused margin
Why it mattersAnyone who wants one unit for both house backup and trips should buy the Apex 300 and stop reading the capacity column.
solar input
So the stack's extra night in the bank only decides anything for a buyer running on grid recharge. With panels on the roof, the Apex 300's thinner 705Wh at dawn is back to full before lunch at rated input, and the multi-day outage argument, which is the strongest thing the stack has after raw capacity, mostly evaporates.
8-Hour Blackout needs 1,645Wh; the stack finishes with 3,056Wh left, the Apex 300 with 705WhSolar input: 3,000W for the stack, 2,400W for the Apex 300Capacities of 5,530Wh and 2,764.8Wh
Why it mattersBuy the stack for outage depth only if you have no solar. If you already own panels, spend the price difference on more of them.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: Because doubling the battery buys only 19,355 kWh of rated lifetime energy against 16,589, and energy is what you are actually paying for.
cost / lifetime kWh
Ten cents a lifetime kilowatt-hour against twenty. Say that once and the value question is settled: the Apex 300 delivers energy at half the stack's cost over the rated life of the pack, and it does it while costing less to buy.
The trap in this section is reading years instead of energy. A cycle on the Apex 300 is 2,764.8Wh and a cycle on the stack is twice that, so 16.4 years against 9.6 at daily use is not the same claim as more energy delivered. The years favour the Apex 300, the lifetime kilowatt-hours favour the stack, and the price gap favours the stack by far less than it charges. Count the energy first, then ask whether the day you are buying for actually needs the bigger cycle.
Your Life, Your Pick
Selected because: Five of the six days we model end with both units still running. The sixth is the only place the second battery earns its money.
Five of the six days we model end with both units still running, which tells you most of what you need: at these sizes the question is not whether it finishes but what is left over. The sixth day is Van Life Daily at 4,685Wh, and it is the only place the extra battery stops being a luxury. The Apex 300 stops 2,335Wh short there, roughly half the day, and no cycle rating rescues an empty box.
Read the stack's win carefully all the same. It covers that day with 16Wh left, and a unit run to the floor daily is a unit doing a full cycle daily, which is how 3,500 cycles becomes 9.6 years. If that is genuinely your load, the honest plan is the stack plus a third battery rather than the stack alone.
Portability & Form Factor
Selected because: 112 lbs separates them, which is the difference between a unit you install once and a unit that comes along.
weight
One reviewer could not lift the Apex 300 onto a table and could barely carry it a few feetB8, while another found the handles and modular battery made it manageableB6. Both are true of an 83.78 lb box, and which one you experience comes down to the route between the car and the campsite. There is nothing to argue about with the stack: 196.1 lbs is a two-person carry you do on delivery day and then never again.
That 112 lb gap is why Weekend Camping and the tailgate go to the Apex 300 while the stack sits on 2,601Wh and 4,031Wh of margin it never spends. Buy the stack when the unit has a permanent address.
What the Specs Don't Tell You
Selected because: Every headline number here is qualified, from a best-case noise floor to a switchover ceiling to a minimum cycle count, and they still favour the Apex 300.
rated cycles
Every number in this section arrives with a qualifier, and the qualifiers all point one way. 45dB is BLUETTI's best-case figure for the Apex 300 rather than a measurement under load. ≤10ms and ≤20ms are ceilings on a data sheet, not stopwatch results. 3,500 and 6,000 cycles are minimums. Discount all three and the Apex 300 is still ahead on all three.
The stack's noise line is blank, which is not the same as quiet. The field commentary that exists calls its fan intermittently loud rather than constantA10, and one owner rates it quieter than a smaller competing unit he already ownsA1. The detail that would actually keep you awake is not in the noise column at all: the indicator lights stay on at full brightness, and the reviewer who noticed that advised keeping the AC500 out of the room you sleep inA11.
Growth Path
Selected because: Both take BLUETTI expansion batteries, so this is the one column on the page that decides nothing.
solar input
Both units take BLUETTI expansion batteries, so the expansion checkbox decides nothing here, which is worth saying out loud because it is a row people buy on. All that differs is where you would start growing from: past 5,530Wh for the stack, past 2,764.8Wh for the Apex 300.
One cost worth pricing before you commit: running two Apex 300s as a single system needs BLUETTI's Hub A1 parallel box, which a reviewer puts at about $699B12. Two Apex 300s at $3,398 plus that hub is roughly $4,097, past the $3,948 the stack costs, and you would be siting two boxes instead of one install. Two Apex 300s at 16,589 kWh each would carry roughly 33,178 kWh of rated lifetime energy against the stack's 19,355, so doubling up on the cheaper unit is the better energy buy. It is not the cheaper way in.
Strengths & trade-offs
BLUETTI AC500 + 2×B300K
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$2,249) than the Apex 300.
- –Significantly heavier (+112.3 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 3,500 charge cycles vs the Apex 300's 6,000, so it wears out sooner.
BLUETTI Apex 300
Strengths
- +Costs $2,249 less
- +Lighter by 112.3 lb
- +Longer warranty
- +Rated for 6,000 charge cycles — much longer battery lifespan
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
Apex 300
A weekend of 2,100Wh puts the Apex 300 at 89% used with 250Wh left. That is a pass with the margin of a planned trip rather than a lazy one, so bring the fridge and leave the electric kettle. The AC500 stack would finish the same weekend at 45% used, which is academic at 196.1 lbs. This scenario is decided in the driveway, not at the campsite.
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
AC500 + 2×B300K
Both units walk through a 1,645Wh evening. What separates them is the morning: 3,056Wh still in the AC500 stack against 705Wh in the Apex 300. If your outages end when the lights come back, that reserve is capacity you paid for and never touched. If they run into a second night with no sun, it is the entire reason the stack exists.
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 pulls about 40W, so eight hours is 320Wh and both units treat the night as a rounding error at 7% and 14% used. Capacity decides nothing. Noise would, except the Apex 300's 45dB is a best-case rating and the AC500 stack publishes nothing at all, so the deciding spec turns out to be that 83.78 lbs can be relocated to the hallway at 2 a.m. and 196.1 lbs cannot.
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
AC500 + 2×B300K
The AC500 + 2×B300K clears the workday at 19% used, banking 3,791Wh — late work, extra calls, or a second laptop charge without arithmetic. The Apex 300 at 39% also finishes, with 1,440Wh of slack for the unplanned.
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
Apex 300
The AC500 + 2×B300K at 196.1 lbs is not a take-along — it rolls off a truck bed if it travels at all, so this scenario belongs to the Apex 300 by default — and it earns it, covering the 670Wh with 1,680Wh to spare. Capacity was never the AC500 + 2×B300K's problem here; getting to a tailgate was.
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
AC500 + 2×B300K
4,685Wh a day is where this comparison ends. The Apex 300 finishes 2,335Wh short, roughly half the day, and no cycle rating fixes an empty box. The AC500 stack covers it with 16Wh left out of 4,701Wh usable, which is a pass rather than a margin: plan on a full cycle every day and budget a third battery from the start.
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: AC500 + 2×B300K runs 22.9h vs 11.5h.
$3,948 list · direct from BLUETTI
Planning for more than this? Describe your whole setup and get it sized →
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–313.4hComfort & 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
September 13, 2026
Verdict: the BLUETTI Apex 300
Buy the Apex 300 at $1,699 unless your load genuinely exceeds 2,350Wh of usable energy in a single day. It is rated for 6,000 cycles against 3,500, delivers energy at ten cents a lifetime kilowatt-hour against twenty, covers five of the six days we model, weighs 112 lbs less, and carries both the faster UPS rating (≤10ms against ≤20ms) and the only published noise figure on the table. The AC500 + 2×B300K stack earns its $3,948 in exactly one place: a 4,685Wh day, which the Apex 300 misses by 2,335Wh. If that is your day, buy the stack and budget a third battery, because it clears that load with 16Wh to spare.
Today the AC500 + 2×B300K is $3,299, $649 under its typical $3,948 and the Apex 300 is $1,499, $200 under its typical $1,699. The verdict weighs typical prices, not today's. Prices checked 16 days ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of September 13, 2026. The links below open BLUETTI's current price.
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 16 days ago. Prices move — check before you buy.
or check the AC500 + 2×B300K price$3,299.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated September 13, 2026
Black Friday · 38 days out
Prices to beat:AC500 + 2×B300K $3,299Apex 300 $1,499
The lowest we have recorded for each. A Black Friday price above it is a sale that unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, RV Living, 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 20 Home Backup-class units), and Apex 300 rates 4.9/5 (92nd percentile of 26 Large-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Two Hands, or Two People
83.78 lbs is a lift you only do when you have to. 196.1 lbs is a two-person job you do on delivery day and then never again, which is fine if the unit has a permanent address and a problem if it does not. The 112 lb gap between them is the difference between a unit that comes on the trip and a unit that waits at home.
Apex 300: 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.
Power Lifting: 6,000W and 7,680W
Both units have BLUETTI's Power Lifting mode: the AC500 + 2×B300K to 6,000W on a 5,000W inverter, the Apex 300 to 7,680W on 3,840W. It works by delivering less power than the appliance asks for rather than more than the inverter has, so the appliance runs slower rather than not at all. BLUETTI scopes the mode to purely resistive loads — a heater, a kettle, an incandescent lamp — so it does nothing for a fridge compressor, a pump or a power tool. Surge is a separate figure: the AC500 + 2×B300K publishes a 10,000W surge peak, the figure a motor's switch-on draw meets, and the Apex 300's record carries none. Neither Lifting figure speaks to motor loads. Judge the Lifting figures on which ceiling covers the resistive load you actually own.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The Apex 300 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The AC500 + 2×B300K is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: 5 Years vs 4
The Apex 300 is covered for 5 years against the AC500 + 2×B300K's 4 years. The Apex 300'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. An underrated factor if you're keeping this unit for years.
Count Kilowatt-Hours, Not Years
6,000 rated cycles against 3,500 works out to 16.4 years of daily use against 9.6, but years mislead when the cycles are different sizes. A cycle here is 2,764.8Wh on the Apex 300 and twice that on the AC500 stack, so the stack's rated lifetime energy still finishes ahead, by far less than the gap in price. Both figures are minimums, and reaching one does not kill the pack: it lands near 80% of original capacity and keeps working.
A Blank Is Not a Number
The AC500 stack publishes no noise figure, which is neither reassurance nor an accusation. There is simply nothing to compare it against, and the Apex 300's 45dB is itself a best-case rating rather than a measurement under load. If the unit is going in a bedroom or beside a CPAP, you are choosing between one soft number and no number, which makes weight the more useful spec: the Apex 300 can be moved out of the room.
Full record above — the Test Desk pick is the Apex 300.
Check Apex 300 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 wins on both sticker price and long-term value. At $0.10/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner. One caution on the lifespan row: the Apex 300 takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit — the AC500 + 2×B300K still delivers more over its shorter horizon (19,355 vs 16,589 kWh). Years measure wear, not usefulness.
Delivers each lifetime kWh for $0.10 less — check the Apex 300 price →
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.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Apex 300
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,765Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Limited ports. You'll likely need a power strip or splitter.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
BLUETTI AC500 + 2×B300K
Field evidence for this exact stack does not exist. Every report we could find covers the AC500 paired with a single B300K, the same inverter and the same battery model wired one to one instead of one to two, so the qualitative findings travel and the runtime numbers do notA0. What travels is mostly positive: one owner's install log calls it quieter than a smaller competing unit, measures about 31W of draw while idling as a UPS, and reports easy setup with a decent if plain appA1A5A9. Another owner says his performed near flawlessly from day oneA12.
The complaints cluster around arrival condition and recovery rather than daily use. One owner's unit shipped without the cable that connects the battery to the inverter, and a testing outfit had two units, an AC300 and an AC500, power up the battery but not the inverter at allA6A7. The same reviewers flag the absence of a hard reset button, which is what turns a glitch into a support ticketA8. Smaller irritations: no time-remaining readout or battery voltage on the display, and the battery has to be disconnected before the unit will shut down because it keeps the BMS awakeA2A4. One owner also measured the unit drawing about 35W more than actual usage after it switched to grid powerA3.
“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
The Apex 300's ledger is thin and early. It launched publicly around mid to late 2025, so what exists is press units and forum posts rather than long-term ownersB0. The clearest pattern in it is firmware: owners report a unit stuck in Backup mode after an update, an E004 error that halted charging at 97%, Bluetooth and Home Assistant disconnects that started after updating, and an update prompt that loops back to saying the unit is currentB1B2B3B4. None of that is hardware and all of it is the kind of thing that gets patched, but buy early and expect to be on a version somebody is still fixing.
On the physical unit the reviewers broadly agree with each other: fans relatively tame under load, and a weight that dominates the experience of moving it at allB5B6B8. Two honest catches worth knowing before you buy. The port bungs are good news if the unit lives under a utility-room sink and annoying with oversized plugs and adaptorsB9. And there is no 12V cigarette-lighter output on the box: the Hub D1 that adds DC ports runs about $300B7B11. The unit does carry a 100W USB-C port, so read the reviews describing it as portless as being about 12V DC rather than USB. The app itself is described as sluggish next to rival apps while still doing the job of toggling modes and monitoring remotelyB10.
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- 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]
- Multiple owners report firmware updates causing app glitches, mode-lock issues, error codes, or Bluetooth/Home Assistant disconnects shortly after updating. [Apex 300 · 4 entries]
- Reviewers consistently flag the lack of built-in USB/DC ports as a design tradeoff requiring costly add-on accessories (Hub D1, Hub A1). [Apex 300 · 4 entries]
- The unit's extreme weight (~85 lbs) is repeatedly described as making it barely 'portable' and hard to carry alone. [Apex 300 · 2 entries]
- A1
“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]
- A3
“Only thing I see so far... when it switched to grid power it was drawing approximately 35 watts more than the actual usage.”
firewoodhoardersclub.com — jtakeman, AC500 w/B300K install and review thread · 2025-02 · [negative]
- A4
“Only drawback is it needs to be disconnected to shut the Bluetti unit down, as it keeps the BMS active and won't let it shut down.”
firewoodhoardersclub.com — jtakeman, AC500 w/B300K install and review thread · 2025-03 · [negative]
- A5
“Using about 31 watts an hour as a UPS — at 85% that should last about 8+ hours. Priceless!!”
firewoodhoardersclub.com — jtakeman, AC500 w/B300K install and review thread · 2025-03 · [positive]
- 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]
- A8
“The lack of a hard reset button on these units is also really frustrating.”
thesolarlab.com — Bluetti AC500 Review: Pros, Cons & the Ugly Truth · unknown · [negative]
- A9
“The accompanying app is decent, plainly presenting all of the basic information.”
thesolarlab.com — Bluetti AC500 Review: Pros, Cons & the Ugly Truth · unknown · [positive]
- 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
“I updated my Apex 300 to the latest firmware yesterday. Now it's stuck in 'Backup' mode... Now when I go into the app to try to change it back, it flashes to...”
BLUETTI Community forum — 'Apex 300 stuck in Backup mode after last firmware update' · 2025-11 · [negative]
- B2
“When the system reached 97% charge, I decided to install the firmware updates. After the update completed, the charging stopped and I received Error 004.”
BLUETTI Community forum — 'Error E004 Apex 300' · 2025-11 · [negative]
- B3
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
GitHub bluetti-official/bluetti-home-assistant issue #95 — 'APEX 300 and Hub A! now working' · 2026-05 · [mixed]
- B4
“Problem is every time I connect to the power station it shows that I still have an update, and I need to tap to upgrade which then tells me I am up to date.”
BLUETTI Community forum — 'Check For Update App issue' · 2025-09 · [negative]
- B5
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [positive]
- B6
“It's heavy, no question, but the handles and modular battery design make it manageable.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [mixed]
- B7
“Not having DC or USB ports on the face is a tradeoff. The Hub D1 solves the problem—but it's an additional $300 accessory that you then have to bolt on after the fact.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [negative]
- B8
“In fact, it's so heavy I can hardly carry it more than a few feet at a time and have been unable to lift it onto a table.”
T3 — 'Bluetti Apex 300 review: transform your off-grid life' · 2025-11 · [negative]
- B9
“Each is protected by a rubber bung, which is good if you've got the Apex 300 below the sink in a utility room or RV. It can be annoying when it comes to inserting oversized plugs or adaptors, though.”
Trusted Reviews — 'Bluetti Apex 300 Review' · 2025-10 · [mixed]
- B10
“The Bluetti app is still a little sluggish compared to the EcoFlow or Anker apps, but it lets you toggle power modes, monitor stats, and tweak settings from a distance.”
TheSolarLab — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [mixed]
- B11
“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 — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [negative]
- B12
“Say you want to connect multiple Apex 300 power stations together, you'll need to buy the Bluetti Hub A1 Parallel Box, which retails for around $699!”
TheSolarLab — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [negative]
Research compiled September 13, 2026.
Who Should Buy Which
Buy the AC500 + 2×B300K if you…
- →Your daily draw genuinely runs past 2,350Wh usable. The 4,685Wh van-life day is the clean example, and the unit will live in one place permanently.
- →You need more than 3,840W continuous or 7,680W of surge. The stack rates 5,000W and 10,000W, so it adds 1,160W of continuous headroom and 2,320W of peak.
- →Outages at your address run into a second and third night and you recharge from the grid rather than panels. 3,056Wh still in the bank at dawn is the whole difference.
- →You intend to keep growing one system past 5,530Wh rather than siting a second box beside the first.
Buy the Apex 300 if you…
- →Your worst night is a fridge, a few lights, the router and some phones. That is the 1,645Wh our blackout model runs, and the Apex 300 ends it at 70% used with 705Wh in hand.
- →You want one unit that backs up the house and still comes on trips. 83.78 lbs is two hands and a flat route, which is one more trip than 196.1 lbs will ever make.
- →You are buying energy rather than a peak day: 6,000 rated cycles, 16.4 years at daily use, and half the cost per lifetime kilowatt-hour.
- →The unit is going somewhere you sleep. It has the only published noise figure here and the faster switchover rating at ≤10ms, and if the fan still bothers you it can be carried out of the room.
If neither fits
If your weekends are phones, a laptop and a string of lights, both of these are appliance-scale and you will resent the lift. Buy a single-battery unit one person can carry and put the difference into panels. And if 4,685Wh really is your every day, remember the stack passes that day by 16Wh: treat it as a floor, price a third battery or a wired house battery instead, and do not buy the two-battery stack expecting headroom it does not have.
The Bottom Line
Buy the Apex 300. The stack's second battery is priced like a doubling and delivers like a top-up: about 81 cents a kilowatt-hour for the energy it adds, against the ten cents the Apex 300 charges across its whole rated life. No port, app or inverter rating argues with a number like that, so you route around it.
The exception is real and it is narrow: a day that needs more than 2,350Wh usable. If that is your every day, the stack is your floor rather than your answer, so budget the third battery with it. If it is not, the Apex 300 does the same job in a box you can still get out of the garage, and you keep $2,249.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI AC500 with two B300K batteries worth $2,249 more than the Apex 300?
Only if you need the capacity on a specific day. The stack holds twice the energy but is rated for 3,500 cycles against the Apex 300's 6,000, so across the rated life it delivers about 17% more energy rather than twice as much. That makes the premium a payment for peak capacity, not for value. It is worth it if a day of yours runs past 2,350Wh usable, and wasted if it does not.
Can the BLUETTI Apex 300 run a house during a blackout?
For one evening of essentials, comfortably. Our 8-hour blackout model draws 1,645Wh and peaks at 150W, and the Apex 300 ends that night at 70% used with 705Wh left. It is rated ≤10ms on UPS switchover, so a router or a desktop should ride through the cutover, treating that as the rating it is rather than a measured result. Where it runs out of road is the second and third night with no sun.
Which one is quieter to sleep next to?
The Apex 300, on the only evidence available. Its 45dB rating is a manufacturer best-case figure rather than a measurement under load, and a reviewer describes its fans as relatively tame. The AC500 stack publishes no figure at all, and the commentary that exists calls its fan intermittently loud rather than constant, though one owner finds it quieter than a smaller unit he already owns. Nobody has measured either, so if the unit is going in a bedroom, buy the one you can carry back out.
Does the Apex 300 have a 12V car port?
Not on the box. The Hub D1 accessory adds the DC ports and runs about $300. The unit itself does carry a 100W USB-C port, so reviews that describe it as portless are talking about 12V DC rather than USB. If you are running a 12V fridge off this, price the hub in before you compare it to anything.
How long will each battery actually last?
At one cycle a day, about 16.4 years for the Apex 300 and 9.6 for the AC500 stack, from rated minimums of 6,000 and 3,500 cycles. At weekend use, twice a week, both outlast any plan you currently have. And the cycle rating is not a death date: past it the pack sits near 80% of its original capacity and keeps working.
Where to buy
BLUETTI AC500 + 2×B300K
$3,299.00
$3,299.00 · direct from BLUETTI
down from $3,948 · 16% below usual
Last checked 16 days ago. Prices move — check before you buy.
BLUETTI Apex 300Pick
$1,499.00
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 16 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.