Head-to-head test
BLUETTI Apex 300 + B500K vs BLUETTI EP500
BLUETTI Apex 300 + B500K vs BLUETTI EP500: 7,885Wh against 5,120Wh, 3,840W continuous against 2,000W, 6,000 rated cycles against 3,500, and double the solar input. Take the Apex bundle unless 5,120Wh already covers your longest outage and you want the whole system in one box.
Full profiles: BLUETTI Apex 300 + B500K → · BLUETTI EP500 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
$300 is the whole premium here, and it buys 2,764.8Wh more battery, nearly double the continuous output and 2,500 more rated cycles. Take the Apex 300 + B500K. The EP500 is the cheaper unit on the shelf and the more expensive one to own, and very little on this page complicates that.
The rated-life arithmetic is where it stops being an argument. 6,000 cycles at 7,885Wh is 47,309 kWh of energy before the pack steps down; 3,500 cycles at 5,120Wh is 17,920. That works out to $0.17 a lifetime kilowatt-hour for the EP500 against $0.07 for the Apex bundle, so the smaller unit sells its energy at well over twice the rate.
The case against the Apex bundle is not its specs, it is its paperwork. No source we could locate confirms this exact 7,885Wh pairing in an owner's hands, and most first-hand commentary is about the bare Apex 300 or a smaller expansion packA0. Its community threads include a unit stuck in Backup mode after a firmware update and an E004 inverter output failure after anotherA7A9, though later threads show app problems clearingA8A10. The EP500's record is thin in a different way: professional test units rather than long-term ownersB0. Neither of these comes with years of field history, so both ask you to trust BLUETTI's spec sheet. One of those spec sheets is much better.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
Priced per lifetime kilowatt-hour, that is $0.07 for the Apex bundle against $0.17 for the EP500. Every cycle you put through the EP500 costs you more than twice what the same cycle costs on the Apex, which means the saving at checkout is repaid with interest by exactly the buyer who uses the thing hardest.
Apex 300 + B500K: 6,000 rated cycles at 7,884.8Wh, for 47,309 kWh over the pack's rated lifeEP500: 3,500 rated cycles at 5,120Wh, for 17,920 kWhThe EP500 is the cheaper of the two on sticker price
Why it mattersIf you will cycle this daily or near-daily, stop comparing stickers. You are buying kilowatt-hours, and one of these sells them at under half the price.
A unit that only passes on nameplate is a unit you would be running to the bottom every single day, and the EP500 is the one with fewer rated cycles to spend: 9.6 years of daily use against 16.4. The Apex bundle finishes the same day at 70% used with 2,017Wh still in it, so it never sees the bottom at all.
Van Life Daily asks for 4,685WhEP500: 5,120Wh nameplate, 4,352Wh after the flat 15% usable allowance applied to every unit hereEP500 is rated for 3,500 cycles against the Apex bundle's 6,000
Why it mattersAnyone whose daily draw runs toward 4,685Wh should read the EP500's 5,120Wh as 4,352Wh and move on.
solar input
In a multi-day outage you spend by night and refill by day, so the two gaps compound instead of cancelling. One eight-hour night leaves the Apex bundle with 3.1 more nights in hand against the EP500's 1.6, and the morning after, the larger unit takes its charge back faster too.
Apex 300 + B500K: 2,400W solar input into 7,884.8WhEP500: 1,200W solar input into 5,120Wh8-Hour Blackout: the Apex bundle finishes at 25% used with 5,057Wh left, the EP500 at 38% with 2,707Wh
Why it mattersIf your outages run past a single evening, this is the chain that decides the page. Recharge speed is a survival spec, not a convenience.
continuous output
A 240V appliance and a 30A inlet are not things you work around with an adapter and patience. Either the socket is on the box or the load stays off. At 2,000W continuous the EP500 is a 120V household backup and a competent one, while the Apex bundle's 3,840W and its two extra sockets reach loads the EP500 cannot reach at all.
Apex 300 + B500K: one 240V outlet, one 30A RV outlet, six AC socketsEP500: no 240V outlet and no 30A RV outlet on our record, four AC sockets, one 12V car socketApex 300 + B500K: 3,840W continuous against the EP500's 2,000W
Why it mattersIf a 240V load or an RV pedestal is anywhere in your plan, the EP500 is out on a socket count before any capacity arithmetic. If it isn't, and you run 12V gear, note that the 12V car socket is the EP500's and our record shows none on the Apex bundle.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: the gap in usable energy is 2,350Wh, which is larger than everything an eight-hour blackout asks for.
continuous output
After the flat 15% conversion allowance this site applies to every unit, the Apex bundle has 6,702Wh to hand out and the EP500 has 4,352Wh. The 2,350Wh between them is larger than the entire 1,645Wh an eight-hour blackout profile asks for. That is not a margin. That is a whole extra night of the thing you bought it for.
The derate is an allowance rather than a measurement of either unit, so read both figures the same way. What it changes is where your planning ceiling sits: the EP500's 5,120Wh becomes 4,352Wh of budget, and any load you sized against the nameplate needs sizing again.
Lifetime Value
Selected because: 47,309 kWh against 17,920 kWh over the two rated lives puts the cheaper unit's energy at well over twice the price.
cost / lifetime kWh
You are not buying a battery, you are buying kilowatt-hours, and these two sell them at very different rates. 6,000 rated cycles at 7,885Wh works out to 47,309 kWh before the pack steps down. 3,500 at 5,120Wh works out to 17,920. In money that is $0.07 a lifetime kilowatt-hour against $0.17.
At daily use the EP500 reaches its rated cycle count in 9.6 years and the Apex bundle in 16.4, nearly seven years apart, and neither unit dies at the line. Both drop to roughly 80% of original capacity and keep working. Which is rather the point: the question was never whether the EP500 lasts, it is how much energy it hands you for what it costs, and on that the answer is not close.
Your Life, Your Pick
Selected because: five of the six load profiles are within both units' reach, and the sixth tells you which unit you are actually buying.
Five of the six profiles are a comfortable pass for both units, which tells you these are two home-backup boxes being asked to do household things. The sixth is where the money shows up. Van Life Daily wants 4,685Wh and the EP500 has 4,352Wh to give, so it covers about 93% of the day. A 333Wh shortfall arrives, inconveniently, at the end of the evening.
The two travel-shaped profiles come back as wins for neither unit, and not because of watts. At 183 lbs and 167 lbs these are units you install. If your list of use cases includes a campsite or a parking lot, the scenario table is telling you to shop a different class entirely.
What the Specs Don't Tell You
Selected because: eight cards fire on this pair and exactly one is a warning, which is worth reading before you decide where either box lives.
rated cycles
One card here is a warning and it is the one about mass. The rest is context: the surge figures disagree about who is stronger depending on whether you read the ratio or the ceiling, the UPS ratings are ≤10ms against ≤20ms and both are ceilings rather than stopwatch results, and the warranties are identical at up to 5 years with registration.
The caution the cards cannot show you sits on the Apex bundle's record. Community threads describe a unit locked in Backup mode after a firmware update and an E004 inverter output failure after anotherA7A9, and owners running several units in parallel report them charging at uneven rates, with unofficial workarounds passed around to keep them in syncA3A4. Later threads show app issues clearingA8A10, and none of these sources could be confirmed as this exact configurationA0. Still, if you buy this bundle, expect to be on the firmware treadmill, and do not take the newest update on the morning of a storm.
Growth Path
Selected because: one unit expands and one is sealed, but the Apex bundle's 7,885Wh base already clears the EP500's ceiling by 2,764.8Wh.
solar input
The EP500 is sealed at 5,120Wh and the Apex bundle takes expansion batteries, and that is the least interesting difference between them. Expansion only becomes an argument once you have outgrown the base, and this base is 7,885Wh, already 2,764.8Wh past where the EP500 stops.
So do not buy the Apex bundle for the growth path. Buy it for the capacity it has today and treat the expansion ports as insurance you will probably never claim. The sealed-box objection only bites the EP500 buyer whose needs climb, and that buyer is better off starting higher than planning to bolt on.
Strengths & trade-offs
BLUETTI Apex 300 + B500K
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Significantly heavier (+16 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI EP500
Strengths
- +Costs $300 less
- +Lighter by 16 lb
Trade-offs
- –Weaker inverter (-1,840W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
- –Sealed capacity — the Apex 300 + B500K can add batteries to grow past 5,120Wh; this one can't.
- –Shorter-lived battery — rated for 3,500 charge cycles vs the Apex 300 + B500K's 6,000, so it wears out sooner.
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
Nothing here is going camping. The 2,100Wh a weekend actually needs is trivial for either box, and they finish at 31% and 48% used without being asked anything difficult. The weekend involves getting there, though, and these weigh 183 lbs and 167 lbs. If the power has to leave the building, you are on the wrong page rather than choosing between the wrong two units.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Apex 300 + B500K
Both survive the night. The Apex 300 + B500K finishes at 25% used with 5,057Wh left — 3.1 more nights like it. The EP500 finishes at 38% with 2,707Wh, 1.6 more nights like it. If your outages tend to run past one evening, that difference is the whole argument between them.
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 roughly 320Wh across a night, which is 5% of the Apex bundle and 7% of the EP500. Both clear it without noticing and capacity settles nothing. What would settle it is the fan running next to your pillow at three in the morning, and only one of these two publishes a figure to be held to. Buy on price, or buy on a noise report you have actually read.
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
A 910Wh workday is 14% of the Apex bundle and 21% of the EP500, and a 60W peak is nothing to either. Both of them spend your working day barely noticing you, so this profile is not where the two separate. The capacity and rated-life numbers are.
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
Same answer as the campsite, with a worse loading problem. The 670Wh and the 400W peak do not trouble either unit for a second. Hoisting a home-backup battery into a truck bed and back out again every Saturday is the part that does not happen. These are boxes you install once and forget, not boxes you pack.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Apex 300 + B500K
The EP500 lands 333Wh short of the 4,685Wh this profile asks for. Its nameplate 5,120Wh would clear the load, and the flat 15% conversion allowance applied to every unit here is what tips it under, but 93% of a day is still a day that ends early. The Apex bundle covers the same load at 70% used with 2,017Wh in reserve, and it is the one you can run hard daily without reaching its cycle limit years sooner.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: Apex 300 + B500K runs 32.7h vs 21.2h.
$3,299 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 0–446.8hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–89.4hHigh-Draw Appliances
These reveal the real limitsscale 0–6.7h¹ 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 19, 2026
Verdict: the Apex 300 + B500K, on Power Score margin
Take the Apex 300 + B500K. $300 buys 2,764.8Wh more battery, 1,840W more continuous output, a 7,680W surge ceiling against 4,800W, 2,500 more rated cycles and twice the solar input, and it is the only one of the two with a 240V outlet and a 30A RV socket. Over their rated lives that comes to 47,309 kWh of energy against 17,920 kWh, or $0.07 a lifetime kilowatt-hour against $0.17. The cheaper box is the more expensive energy, and nothing on the EP500's side of the table closes a gap that size. What keeps this off a flat certainty is evidence rather than specs: nothing we could locate documents this exact 7,885Wh pairing in an owner's handsA0, and the Apex's community threads carry a run of firmware-update failuresA7A9. Buy the EP500 only if 5,120Wh genuinely covers your longest outage and you want one integrated tower instead of a base plus a battery.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of September 19, 2026. The links below open BLUETTI's current price.
$3,299.00 · direct from BLUETTI
Last checked 16 days ago. Prices move — check before you buy.
or check the EP500 price$2,999.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated September 19, 2026
Black Friday · 38 days out
Prices to beat:Apex 300 + B500K $3,299EP500 $2,999
We have never seen either discounted, so any real cut would be a first.
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 3.5/5 (11th percentile of 29 Whole-Home / Off-Grid-class units), and EP500 rates 3.4/5 (5th percentile of 20 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.
Neither One Moves Twice
Sixteen pounds separate them and it is the least useful number on this card. The EP500 is one 167 lb tower: a two-person lift, planned in advance, ideally once. The Apex bundle's 183 lbs is spread across its boxes, so there is no single brutal lift, but there are more pieces to place and cable. Pick the spot before either one arrives, because you will not be changing your mind about it casually.
Apex 300 + B500K: 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.
Expansion Is the Least of It
The EP500 is sealed at 5,120Wh, and for a lot of households that is a number to check rather than a flaw to fear. The honest note is about the other side: the Apex bundle's expansion ports are the least interesting advantage it holds, because you would have to outgrow 7,885Wh before they ever come up, and that is already 2,764.8Wh past where the EP500 stops. Buy the Apex bundle for the capacity it has. Treat the room to grow as insurance you will probably never claim.
Apex 300 + B500K: Power Lifting to 7,680W
The Apex 300 + B500K has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 7,680W from its 3,840W inverter. It does that by delivering less power than the appliance asks for, not more than the inverter has: the heater still works, it just heats more slowly. Two things follow. 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, and this record publishes no surge figure at all, so read the mode as a resistive-load feature rather than as starting ability. And it is not a reason to size down, because running a load that big from 7,885Wh is a short session either way. Genuinely useful if a heater or a kettle is why you're buying; beside the point otherwise. Our record for the EP500 carries no Power Lifting figure, only a 4,800W surge peak, which is a different rating, so check BLUETTI's own spec sheet before reading this as something the EP500 lacks.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The Apex 300 + B500K is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The EP500 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: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Both figures are maximums rather than guarantees — they depend on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term.
Battery Lifespan in Real Years
The Apex 300 + B500K is rated for 6,000 cycles vs 3,500. In real life: at daily use, that's 16.4 vs 9.6 years. At weekend use (twice a week), it's 58 vs 34 years. One caution reading years across different sizes: a cycle is 7,885Wh on the Apex 300 + B500K and 5,120Wh on the EP500, so count lifetime energy — roughly 47,309 kWh against 17,920 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
EP500: Noise Level Not Disclosed
The Apex 300 + B500K publishes its noise level (45dB); the EP500 doesn't publish one. That isn't evidence the EP500 is louder — it means there's no figure to hold it to, and no way to compare the two on this without hearing them. If you're buying for a bedroom, a CPAP, or an apartment, treat the Apex 300 + B500K's 45dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the EP500 before deciding.
Full record above — the Test Desk pick is the Apex 300 + B500K.
Check Apex 300 + B500K price →or check the EP500 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 EP500 is cheaper to buy, but the Apex 300 + B500K is cheaper to own. At $0.07/kWh over its lifetime vs $0.17/kWh, the Apex 300 + B500K's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $0.10 less — check the Apex 300 + B500K price →
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.
Limited ports. You'll likely need a power strip or splitter.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
EP500
FIXED CAPACITYFixed at 5,120Wh — a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 1,200W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The EP500 is sealed at 5,120Wh, which is fine if that covers you. The Apex 300 + B500K starts at 7,885Wh and can grow beyond it with BLUETTI expansion batteries — real headroom the EP500 doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
BLUETTI Apex 300 + B500K
Start with what is not here. No source we could locate documents this exact 7,885Wh pairing in an owner's hands, most first-hand commentary is about the bare Apex 300 or a smaller expansion pack, and nobody has reported six months or more of ownershipA0. Read everything below as character, not confirmation.
What exists splits cleanly. Three independent reviewers describe the fans as even and quiet for a unit of this output classA1A2A13, and one owner running external batteries called it trouble-free with the 240V output as the standoutA5. Against that, firmware is a recurring theme: a unit locked in Backup mode after an update, an E004 inverter output failure after another, and an app that stopped connecting until a later release fixed itA7A8A9. Owners running several units in parallel found them charging at different rates and traded homemade workarounds to keep them syncedA3A4. And on handling, one reviewer could not lift it onto a table or carry it more than a few feetA11.
“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.”
Sources
bluettipower.com
BLUETTI EP500
The EP500's field record is professional test units rather than long-term owners. No Reddit or forum thread specific to the non-Pro model turned up, and no six-month-plus longevity reportB0. What exists is consistent about two things.
Weight is the complaint everyone arrives at: 167 lbs makes it a stay-at-home unit, too heavy to take camping, tall and awkward to liftB1B9. Most of the praise comes from a single detailed review, and all of it points at home backup. UPS mode described as a lifesaver for medical equipment, app control that saves a trip to the garage to check on it, a pack that barely dissipates heat, and up to four days of fridge duty on one chargeB3B4B5B6. Another reviewer timed its 1,200W solar input at as little as 4.7 hours to fullB7. The one sour note beyond weight is a touchscreen that felt laggyB2.
“The EP500's UPS mode is a true lifesaver for medical equipment users when the power goes out.”
Sources
greencitizen.com · techwalls.com · bestgeneratorsolar.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]
- Weight (167 lbs) is the most consistently cited drawback of the EP500, flagged by multiple reviewers as making it a stay-at-home, non-portable unit. [EP500 · 2 entries]
- Reviewers consistently praise the EP500's UPS and app-control features for home/medical backup, plus its multi-day fridge runtime. [EP500 · 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]
- A5
“So far so good. Works with external batteries. For small applications the solar available works OK. For me the 240V output is great.”
DIY Solar Power Forum — "Bluetti Apex 300 launched today… anyone have thoughts?" (page 2) · 2025-05 · [positive]
- 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]
- 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
“Weighing in at 167 lbs, the EP500's biggest issue is portability — it's simply too heavy to take camping.”
greencitizen.com — Bluetti EP500 Breakdown + Brand Review · unknown · [negative]
- B2
“The touch screen response felt quite laggy — a second drawback beyond the unit's sheer weight.”
greencitizen.com — Bluetti EP500 Breakdown + Brand Review · unknown · [negative]
- B3
“The EP500's UPS mode is a true lifesaver for medical equipment users when the power goes out.”
greencitizen.com — Bluetti EP500 Breakdown + Brand Review · unknown · [positive]
- B4
“With app control, there's no need to trek to the garage just to check on the unit.”
greencitizen.com — Bluetti EP500 Breakdown + Brand Review · unknown · [positive]
- B5
“The battery pack hardly dissipates any heat, so a phone charging nearby won't encounter thermal damage.”
greencitizen.com — Bluetti EP500 Breakdown + Brand Review · unknown · [positive]
- B6
“With a massive 5,120Wh battery, the EP500 can keep a fridge running for up to 4 days without a recharge.”
greencitizen.com — Bluetti EP500 Breakdown + Brand Review · unknown · [positive]
- B7
“The EP500's 1,200W solar input charges it in as little as 4.7 hours, versus 2.6 hours for the Pro's 2,400W input.”
techwalls.com — Bluetti EP500 vs EP500 Pro Power Station comparison · unknown · [positive]
- B9
“This is a tall power station that will be very heavy to lift — big and heavy is the tradeoff for that much capacity.”
bestgeneratorsolar.com (Pure Power Solar) — Bluetti EP500 & EP500Pro Review · unknown · [mixed]
Research compiled September 19, 2026.
Who Should Buy Which
Buy the Apex 300 + B500K if you…
- →You are backing up part of a house and there is a 240V load or a 30A RV inlet in the plan. The Apex bundle has a socket for each and the EP500 has neither.
- →Your outages run past one evening. An eight-hour night leaves this one at 25% used with 5,057Wh in hand, and its 2,400W solar input takes that charge back faster than the smaller unit's 1,200W.
- →Your daily draw runs toward 4,685Wh, which is where the EP500's 4,352Wh usable stops being enough and this one still finishes with 2,017Wh spare.
- →You expect to cycle it most days for a decade or more. 6,000 rated cycles is 16.4 years of daily use at $0.07 a lifetime kilowatt-hour.
Buy the EP500 if you…
- →Your longest realistic outage is a single evening and 5,120Wh clears it with room. This one finishes an eight-hour blackout at 38% used, and you keep $300 in your pocket.
- →You want one integrated tower rather than a base plus a battery to place and cable, and you would rather have the 12V car socket than the 240V outlet.
- →You are protecting medical equipment at home, and one reviewer's account of its UPS mode and app control matters more to you than headroom you will never useB3B4.
If neither fits
If any part of your plan involves taking the power with you, close both tabs. These weigh 183 lbs and 167 lbs, our records mark both as stationary, and reviewers say it about the EP500 in plain language: too heavy to take campingB1B9. A campsite, a tailgate or a truck bed wants a unit one person can pick up, and that is a different page. And if what you actually want is whole-home 240V backup living behind a transfer switch, buy a hardwired home battery system rather than a station with a 240V socket on the front of it.
The Bottom Line
Take the Apex 300 + B500K. 6,000 cycles at 7,885Wh is 47,309 kWh of energy over the pack's rated life against the EP500's 17,920, which is $0.07 a lifetime kilowatt-hour against $0.17, and that arrives alongside nearly double the continuous output, twice the solar input and the only 240V and 30A sockets on the page. $300 is a small toll for the distance between those two columns.
The EP500 is not a bad unit. It is a smaller one with a shorter life, and there is a real buyer for it: 5,120Wh covers one evening comfortably, it arrives as a single tower, and the one detailed review we have likes what it does for home and medical backupB3B4. If that is your ceiling and you know it is your ceiling, buy it and do not look back. If you are not sure it is your ceiling, you have just answered the question.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Apex 300 + B500K worth the extra over the EP500?
Yes, unless 5,120Wh already covers you. $300 buys 2,764.8Wh more battery, 1,840W more continuous output and 2,500 more rated cycles, and it moves the lifetime cost of energy from $0.17 a kilowatt-hour to $0.07. The only version of this question the EP500 wins is the one where you would never touch the extra.
Can the EP500 run a 240V appliance or a 30A RV hookup?
No. Our record shows no 240V outlet and no 30A RV outlet on the EP500, while the Apex 300 + B500K has one of each plus six AC sockets to the EP500's four. If either of those loads is in your plan, that settles the page on its own, before capacity comes into it.
Which is quieter, the Apex 300 + B500K or the EP500?
Nobody can tell you from spec sheets. BLUETTI publishes 45dB for the Apex 300 + B500K, which is a spec-sheet figure rather than a bench measurement, and publishes nothing at all for the EP500. That silence is an absence of data, not evidence the EP500 is louder. Reviewers do describe the Apex's fans as even and quiet for its output class, though none of those sources could be confirmed as this exact configuration. If the unit will sleep in the same room as you, find a hands-on report before buying either.
How long will each of these last?
The Apex 300 + B500K is rated for at least 6,000 cycles and the EP500 for at least 3,500. Cycled daily that is 16.4 years against 9.6; twice a week, 58 years against 34. Neither dies at the line either, since the pack steps down to roughly 80% of original capacity and keeps working, so read those years as when the unit gets smaller rather than when it stops.
Is the EP500 too heavy to move?
For one person, effectively yes. It is 167 lbs, and reviewers call it a stay-at-home unit that is too heavy to take camping. The Apex 300 + B500K is heavier in total at 183 lbs but splits across separate boxes, so there is no single worst lift. Either way, decide where it lives before it arrives.
Where to buy
BLUETTI Apex 300 + B500KPick
$3,299.00
$3,299.00 · direct from BLUETTI
Last checked 16 days ago. Prices move — check before you buy.
BLUETTI EP500
$2,999.00
$2,999.00 · direct from BLUETTI
Last checked 16 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.