Head-to-head test
BLUETTI Apex 300 + B500K vs BLUETTI EP900 + 2×B500
You're paying more than three times the price for barely 2,000Wh more energy, so this was never about capacity: the EP900's money buys a hardwired 7,600W whole-home inverter and a 9,000W solar ceiling, and if you don't need those the Apex does the same backup for a third of the cost.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
BLUETTI
Apex 300 + B500K
7,760Power Score · The AC & Fridge Zone
$3,299.00 list · direct from BLUETTI
BLUETTI
EP900 + 2×B500
10,574Power Score · Whole-Home Capable
$10,298.00 list · direct from BLUETTI
Spec deltas
The BLUETTI EP900 with two B500 batteries costs $10,298 and holds 9,920Wh. The Apex 300 with a B500K costs $3,199 and holds 7,884.8Wh. That's more than three times the price for just over 2,000Wh more energy, which means capacity was never the point of the EP900.
At $1.03 per watt-hour against the Apex's $0.41, the EP900 stores the most expensive energy on this page. What the extra $7,099 actually buys is a hardwired whole-home platform: 7,600W of continuous output against 3,840W, a 9,000W solar ceiling against 2,400W, a 10-year warranty against 5, and 6,000 cycles against 3,500.
For most buyers, even most whole-home backup buyers, none of that changes the outcome, because the Apex already covers every realistic home scenario. The EP900 earns its premium in exactly one place: a permanent, hardwired install that has to run big 240V loads or go off-grid. If that isn't you, the Apex is the same protection for a third of the money.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
At $0.41 per watt-hour against $1.03, the $7,099 gap isn't buying kilowatt-hours at all; the two units store nearly the same energy, and the money goes entirely to the platform around it.
Apex 300 + B500K: $3,199 for 7,884.8WhEP900 + 2×B500: $10,298 for 9,920Wh
Why it mattersAnyone comparing these on capacity should stop, because the energy is close; the real question is whether you need what the extra money actually buys.
continuous output
That's the one spec the premium genuinely buys: 7,600W hardwired into your panel can run 240V high-draw loads like a well pump or dryer at the same time as the rest of the house, where 3,840W backs up essential circuits but has to stage those big loads one at a time.
Apex 300 continuous output is 3,840WEP900 continuous output is 7,600W
Why it mattersA whole-home install that must run several heavy appliances simultaneously is the only buyer the EP900's output is actually for.
rated cycles
Both horizons outrun how anyone actually uses a home backup unit, which cycles occasionally rather than daily, so the difference you can bank isn't the cycle count you'll never reach; it's the warranty term, 10 years of coverage against 5.
Apex is rated for 3,500 cycles and a 5-year warrantyEP900 is rated for 6,000 cycles and a 10-year warranty
Why it mattersValue the EP900's longevity as double the warranty coverage, not as extra cycles, because the cycles are surplus you won't consume.
solar input
But 2,400W already refills the Apex's 7,884.8Wh in roughly 3.5 hours of strong sun, so the 9,000W ceiling only pays off when you're feeding a large panel array into a much bigger battery bank to live off solar, not when you're topping off a backup unit.
Apex accepts up to 2,400W of solarEP900 accepts up to 9,000W of solar
Why it mattersThe solar headroom is decisive for off-grid homesteaders and irrelevant for grid-tied backup buyers, so know which one you are before paying for it.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: Nearly identical energy, one costs 3x more; cost per Wh is the headline.
cost / lifetime kWh
The Apex 300 + B500K stores the cheapest energy in this matchup: $0.41 per watt-hour against the EP900's $1.03, and $0.12 per lifetime kWh against $0.17. That holds even though the EP900 carries the higher 6,000-cycle rating against the Apex's 3,500.
The reason is the entry price. The EP900's 10-year warranty and 6,000 cycles are real coverage, but you pay $10,298 to get them, and the Apex reaches nearly the same capacity for $3,199. Cost per warranty year says the same thing from the other direction: $640 a year for the Apex against $1,030 for the EP900.
PowerScore Breakdown
Selected because: The 3,840W vs 7,600W output gap is the one thing the EP900's premium genuinely buys.
overall power score
The EP900 scores 10,574 against the Apex's 7,794, and the gap is output, not energy. Continuous power runs 7,600W against 3,840W, close to double.
That single number is the whole case for the EP900. 7,600W hardwired into your panel can run 240V high-draw appliances, a well pump or a dryer, at the same time as the rest of the house; 3,840W backs up essential circuits but has to take those big loads one at a time. If your panel never sees that kind of simultaneous demand, the extra output sits idle and you've paid for a ceiling you don't reach.
Your Life, Your Pick
Selected because: Both clear every realistic home load; proves the EP900's extra capacity is surplus.
Both units clear every realistic home scenario here, and it isn't close. An 8-hour blackout needs about 1,645Wh, roughly a quarter of the Apex's capacity and a fifth of the EP900's. A CPAP overnight, a remote workday, a tailgate: both finish with the large majority of the battery untouched.
Van Life Daily is the only scenario the engine hands to the EP900, and even there both cover the job, the Apex at 70% of capacity and the EP900 at 56%. At 183 and 343 lbs, neither is going in a van regardless. The real takeaway is that the Apex's capacity already covers what a home buyer will actually draw, so the EP900's extra energy is headroom past the ceiling you'll use.
Portability & Form Factor
Selected because: 183 vs 343 lbs; both stationary, but the EP900 is a permanent hardwired fixture.
weight
Neither of these is portable in any honest sense. The Apex 300 + B500K weighs 183 lbs and the EP900 + 2×B500 weighs 343 lbs; both are two-person, install-and-leave systems.
The difference is what kind of stationary. The Apex is a floor-standing unit you can still relocate with a hand truck and a second person. The EP900, at 343 lbs and wired into your electrical panel, is a permanent fixture you commit to a spot. If there's any chance you'll move the thing, that 160-lb gap is the quiet tiebreaker.
Growth Path
Selected because: Same-brand upgrade path; fold in which BLUETTI base is worth growing into.
solar input
Both expand with more BLUETTI batteries, so neither is a dead end, but they grow in opposite directions. The Apex adds capacity cheaply and refills from up to 2,400W of solar, enough to top off its 7,884.8Wh in a strong afternoon, which is all a backup setup ever needs. The EP900 accepts 9,000W of solar and stacks into a far larger bank, the direction BLUETTI clearly builds this platform toward for whole-home off-grid living.
That's the honest case for stepping up. If you're buying into a system you expect to grow into whole-home energy independence, the EP900 is the more future-proof base and BLUETTI is actively expanding that line. If you're buying backup that will stay backup, the Apex's growth path is all you'll ever touch, at a third of the price.
Strengths & trade-offs
BLUETTI Apex 300 + B500K
Strengths
- +Costs $6,999 less
- +Lighter by 160 lb
Trade-offs
- –Weaker inverter (-3,760W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 3,500 charge cycles vs the EP900 + 2×B500's 6,000, so it wears out sooner.
BLUETTI EP900 + 2×B500
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$6,999) than the Apex 300 + B500K.
- –Significantly heavier (+160 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Either unit
Both handle two nights comfortably. The Apex 300 + B500K uses 31% and the EP900 + 2×B500 uses 25%. With this little difference, pick based on weight and portability instead. The lighter unit wins for car camping.
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
Both walk this one. An 8-hour outage needs about 1,645Wh, roughly a quarter of the Apex's capacity and a fifth of the EP900's. Neither breaks a sweat, so let price decide, and the Apex is a third of the cost.
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
Both are wildly overqualified for CPAP. You're using 5% or less. Save your money and buy whichever is cheaper; the extra capacity is completely wasted on a 40W overnight load. Put the savings toward a second battery for multi-night trips.
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 breaking a sweat. At these utilization levels, prioritize the unit with better USB-C output for direct laptop charging. It's more convenient than using the AC inverter and wastes less energy.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
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
EP900 + 2×B500
The EP900 uses less of its capacity here, 56% against the Apex's 70%, so the engine gives it the edge. But both finish a full day's draw, and at 183 and 343 lbs neither is a van unit in the first place. Treat this as a tie on the spec that matters and a non-starter on weight.
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 six 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: EP900 + 2×B500 runs 41.1h vs 32.7h.
$10,298 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 0–562.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–112.4hHigh-Draw Appliances
These reveal the real limitsscale 0–8.4h¹ 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 16, 2026
Verdict: the BLUETTI Apex 300 + B500K
The Apex 300 + B500K holds 7,884.8Wh for $3,199; the EP900 + 2×B500 holds 9,920Wh for $10,298. That's more than three times the price for just over 2,000Wh more energy, which tells you the EP900's premium isn't buying runtime. It's buying a hardwired 7,600W whole-home inverter against the Apex's 3,840W, a 9,000W solar ceiling against 2,400W, and a 10-year warranty against 5. For a buyer wiring a permanent whole-home system that must run 240V high-draw appliances, or going seriously off-grid, those are worth the money. For everyone else, including most whole-home backup buyers, the Apex covers the same scenarios, delivers the cheapest energy here at $0.41 per watt-hour, and expands on the same platform for a third of the price. Buy the Apex unless you specifically need what the extra $7,099 is actually for.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 16, 2026. The links below open BLUETTI's current price.
$3,299.00 list · direct from BLUETTI
or check the EP900 + 2×B500 price$10,298.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 16, 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, Apex 300 + B500K rates 3.6/5 (19th percentile of 17 Whole-Home / Off-Grid-class units), and EP900 + 2×B500 rates 3.9/5 (38th percentile of 17 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.
Both stationary, one permanent
At 183 lbs the Apex is a two-person lift you can still relocate with a hand truck. At 343 lbs and wired into your panel, the EP900 is a fixture you commit to one spot. If you might ever move it, that 160-lb gap decides it.
Quiet for the class
The Apex is rated at 45dB and the EP900 at 50dB, both subdued for systems this size. Fan noise isn't a reason to pick between them; reviewers consistently describe the Apex's cooling as even and unobtrusive even under load.
Cycles you won't reach
3,500 cycles for the Apex, 6,000 for the EP900, which pencils out to 9.6 versus 16.4 years of daily cycling. A home backup unit doesn't cycle daily, so both outlast realistic ownership. The number that actually differs is the warranty: 5 years against 10.
Full record above — the Test Desk pick is the Apex 300 + B500K.
Check Apex 300 + B500K price →or check the EP900 + 2×B500 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 + B500K wins on both sticker price and long-term value. At $0.12/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Growth path
Apex 300 + B500K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 7,885Wh.
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.
EP900 + 2×B500
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 9,920Wh.
Accepts up to 9,000W 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.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the EP900 + 2×B500's higher solar ceiling (9,000W vs 2,400W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
BLUETTI Apex 300 + B500K
Field data on this exact configuration is thin. The Apex 300 + B500K is new and niche, and most of the available first-hand commentary covers the bare Apex 300 or other battery pairings rather than this B500K bundle, so treat its long-term longevity as unproven for now. What does come through consistently is the cooling: multiple reviewers call the dual-fan system unusually quiet and even for a unit this size, usable near a sleeping area without the jet-engine ramp some rivals hit under loadA1A2A13.
The recurring complaint is software, not hardware. Owners report firmware and app updates that have locked the unit into the wrong mode, failed to download, or thrown inverter error codes, though several threads show the problem clearing after a later update or a support callA7A8A9A10. Two other real-world notes worth knowing: run multiple units or expansion batteries in parallel and charge rates can drift out of sync, forcing community workaroundsA3A4; and the unit is genuinely hard to move, with one reviewer unable to lift it onto a table, and no native USB or DC ports unless you add BLUETTI's separate hubA11A12.
“Turns out the Apex 300's noise control is on par with the quietest power stations on the market, like those on offer from EcoFlow and DJI.”
BLUETTI EP900 + 2×B500
Independent long-term field data on the EP900 stack is limited; much of what's published traces back to BLUETTI's own material and press coverage rather than years-in ownership, so weigh it accordingly. The consistent theme is scale: reviewers describe a whole-home system that runs a washer, dryer, heater, and refrigerator, expands with more B500 modules into weeks of essential backup, and switches from grid to battery fast enough that one owner said the transfer was completely unnoticeable during an outageB1B2B3.
Owners tie it to solar and describe going effectively off-grid on its LiFePO4 cells, with complete installed systems landing in five figures before installation laborB4. That's the pitch and the price bracket in one: a hardwired platform for people building toward energy independence, not a plug-in backup box.
“A whole-home system: one EP900 inverter provides up to 9,000W (18,000W with two units), enough to run a washer, dryer, heater, and refrigerator.”
Sources
bluettipower.com · bestgeneratorsolar.com · mightygenerators.com · bgr.com · offgridsource.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 independent reviewers describe the dual-fan cooling as noticeably quiet/even for a unit of this output class, even under load. [Apex 300 + B500K · 3 entries]
- Firmware and app updates have repeatedly caused mode-lock, download failures, or inverter error codes; several threads show the issue eventually resolved after further updates or support contact. [Apex 300 + B500K · 4 entries]
- When running multiple Apex 300 units or expansion batteries in parallel, owners report uneven charge rates between units, with community-devised (unofficial) workarounds needed to keep them in sync. [Apex 300 + B500K · 2 entries]
- The stripped-down, modular design draws criticism for real-world handling: extreme weight makes it hard to move, and lack of native USB/DC ports forces reliance on a separate paid hub accessory. [Apex 300 + B500K · 2 entries]
- Whole-home 9,000W output, large B500 expandability (to ~39.6kWh), 10ms UPS, and solar off-grid capability are the standout features. [EP900 + 2×B500 · 3 entries]
- A1
“Turns out the Apex 300's noise control is on par with the quietest power stations on the market, like those on offer from EcoFlow and DJI.”
The Solar Lab — "Bluetti Apex 300 Review: Cheap, Practical Home Backup?" · unknown · [positive]
- A2
“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]
- A3
“The Apex 300 have some major charging problems... When the units are charging from the grid they charge at different rates and not together.”
DIY Solar Power Forum — "Bluetti Apex 300 problems" · 2025-09 · [negative]
- A4
“I have found a simple way to get around some of the solar charging limitations with multiple APEX 300s hooked up in parallel... So far, I have not had any problems with my setup.”
DIY Solar Power Forum — "Bluetti Apex 300 problems" · 2025-09 · [mixed]
- A7
“I updated my Apex 300 to the latest firmware yesterday. Now it's stuck in 'Backup' mode... when I go into the app to try to change it back, it flashes to...”
BLUETTI Community — "Apex 300 stuck in Backup mode after last firmware update" · 2025-11 · [negative]
- A8
“There was an update on my Apex 300 a few days ago IOT v8026.12... Problem is every time I connect to the power st[ation]... Edit - This seems fixed now hooray!”
BLUETTI Community — "Check For Update App issue" · 2025-09 · [mixed]
- A9
“After the update completed, the charging stopped and I received Error 004... I have error E004 Inverter Output Failure.”
BLUETTI Community — "Error E004 Apex 300" · 2025-11 · [negative]
- A10
“I had a power outage in the middle of the night, so I hooked everything (Hub A1 and all 300's) back up and now HA is populating. YEA!!!”
GitHub bluetti-official/bluetti-home-assistant — "APEX 300 and Hub A1 now working" (Issue #95) · 2026-05 · [mixed]
- A11
“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]
- A12
“The Apex 300 doesn't have USB ports, DC ports, or much of anything beyond its six AC plugs and high-voltage connectors.”
The Solar Lab — "Bluetti Apex 300 Review: Cheap, Practical Home Backup?" · unknown · [negative]
- A13
“Fan noise remains even, with no distracting pitch or rattle. This makes the Apex 300 usable near sleeping areas or indoor workspaces without disturbance.”
Yanko Design — "BLUETTI Apex 300 Review" · 2025-05 · [positive]
- B1
“A whole-home system: one EP900 inverter provides up to 9,000W (18,000W with two units), enough to run a washer, dryer, heater, and refrigerator.”
bluettipower.com / bestgeneratorsolar.com — EP900 + B500 guide · 2026 · [positive]
- B2
“With B500 batteries (4,960Wh each), capacity expands from 9.9kWh up to about 39.6kWh with eight B500 modules — weeks of essential backup.”
bluettipower.com / mightygenerators.com — EP900 + B500 · 2026 · [positive]
- B3
“A fast UPS switches from grid to battery within 10 milliseconds; one owner reported the transfer is completely unnoticeable during outages.”
bgr.com / owner review — EP900 + B500 · 2026 · [positive]
- B4
“Built on reliable LiFePO4 cells; tied to solar, an owner said they can virtually go off-grid and minimize utility bills. Complete systems run roughly $14,500-$15,000 excluding installation.”
bgr.com / offgridsource.com — EP900 + B500 review · 2026 · [positive]
Research compiled July 16, 2026.
Who Should Buy Which
Buy the Apex 300 + B500K if you…
- →You want essential-circuits or whole-home-essential backup that plugs in rather than gets wired into your panel; 3,840W and 7,884.8Wh cover it, and refill from 2,400W of solar in a single strong afternoon.
- →You want the cheapest energy here with room to grow: $0.41 per watt-hour, $3,199 up front, and the same BLUETTI expansion path if your needs get bigger.
Buy the EP900 + 2×B500 if you…
- →You're doing a permanent, hardwired whole-home installation and need to run 240V high-draw appliances, a well pump, dryer, or AC, at the same time as everything else; 7,600W continuous is the reason to step up.
- →You're going seriously off-grid, where the 9,000W solar ceiling, the bigger battery bank it feeds, and the 10-year warranty justify the premium at that scale.
If neither fits
If you want something you actually carry, to a campsite, a tailgate, or into an RV, neither belongs in the conversation. At 183 and 343 lbs these are install-and-leave home systems; a buyer who needs portability should look at a 1-2kWh unit in the 20-40 lb class instead.
The Bottom Line
This isn't a close call for most people. The Apex 300 + B500K holds nearly as much energy as the EP900 stack, costs $3,199 against $10,298, and delivers the cheapest energy on the page at $0.41 per watt-hour. The EP900's premium doesn't buy runtime; it buys a hardwired whole-home inverter and a 9,000W solar ceiling you may never call on.
Step up to the EP900 + 2×B500 only if you're wiring a permanent whole-home system that has to run 240V high-draw loads, or going off-grid on the strength of that solar ceiling and the 10-year warranty. For everyone else, including most whole-home backup buyers, the Apex is the same protection for a third of the money. Buy the Apex.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI EP900 worth three times the price of the Apex 300?
Only for a specific buyer. The two hold nearly the same energy, 9,920Wh against 7,884.8Wh, so the extra $7,099 buys a hardwired 7,600W whole-home inverter and a 9,000W solar ceiling, not more runtime. If you need whole-house 240V backup or serious off-grid solar, it's worth it; for standard backup, the Apex does the same job for $3,199.
Which BLUETTI is cheaper to run over its life?
The Apex 300 + B500K, at $0.12 per lifetime kWh against the EP900's $0.17, and $0.41 per watt-hour up front against $1.03. Even though the EP900 carries a higher 6,000-cycle rating, the Apex's far lower price makes its stored energy the cheaper of the two.
Can the Apex 300 back up a whole house?
For essential circuits, yes. 3,840W continuous and 7,884.8Wh will carry a fridge, lights, and electronics through a long outage with capacity to spare. What it can't do is run several 240V high-draw appliances at once the way the EP900's 7,600W hardwired inverter can.
Do I need the EP900's bigger solar input?
Only if you're going off-grid. The Apex's 2,400W already refills its 7,884.8Wh in roughly 3.5 hours of strong sun, which is plenty for grid-tied backup. The EP900's 9,000W ceiling matters when you're feeding a large panel array into a much bigger battery bank to live off solar.
Where to buy
BLUETTI Apex 300 + B500KPick
$3,299.00
$3,299.00 list · direct from BLUETTI
BLUETTI EP900 + 2×B500
$10,298.00
$10,298.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.