Head-to-head test
BLUETTI AC240P vs BLUETTI EP900 + 2×B500
BLUETTI AC240P vs BLUETTI EP900 + 2×B500: Buy the AC240P if your power ever has to leave the house, which is why most people open a comparison like this.
Full profiles: BLUETTI AC240P → · BLUETTI EP900 + 2×B500 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$1,461.99 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
$10,298.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The AC240P weighs 72 pounds and you carry it. The EP900 with two B500s weighs 343 pounds and an electrician wires it into your breaker panel. That gap isn't a spec you weigh against other specs; it's a category line, and it settles this comparison before capacity or price gets a vote.
On paper the EP900 stack buries the AC240P: 9,920Wh to 1,843, 7,600W of output to 2,400, a solar ceiling of 9,000W against 1,200. None of that helps at a campsite, a tailgate, or in a van, because the EP900 doesn't leave the building it's bolted to. In every one of those jobs the AC240P wins by being the only one that can show up, and it covers the smaller ones with room to spare.
So the verdict forks on one question. If you want power you can pick up and take somewhere, buy the AC240P and stop reading. If you want a system that backs up your whole house on solar and never moves, the EP900 is a legitimate machine, but you're comparing it to the wrong thing, and you should be cross-shopping other installed systems instead of a 72-pound portable.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
That reframes its headline 9,920Wh: the capacity only exists where the unit lives, so against the AC240P it's 8,432 usable watt-hours that never reach a campsite. The mobile jobs split into the ones the AC240P finishes and the ones neither of these does, and the EP900's size never enters the conversation.
EP900 + 2×B500 is hardwired and stationary: 343 lbs, installed at the electrical panel, no sockets on the boxAC240P is a 72-lb portable that is not hardwiredIn the mobile scenarios the EP900 is marked 'neither / can't travel', while the AC240P wins Tailgate (670Wh) and CPAP (320Wh)
Why it mattersIf your power has to move, treat the EP900 as ineligible and don't pay for capacity you can't carry.
cost / lifetime kWh
But $0.17 only beats $0.23 if you actually draw those 59,520 kWh, which means running a home on it for over a decade. A portable-power buyer never approaches that ceiling, so for them the real number isn't six cents of savings per kWh. It's the $8,836 of extra upfront cost ($10,298 minus $1,462) for range they can't use.
AC240P costs $0.79 per Wh to buy; EP900 + 2×B500 costs $1.04 per Wh to buyCost per lifetime kWh runs the other way: $0.23 for the AC240P, $0.17 for the EP900 stackEP900 delivers about 59,520 kWh over 6,000 cycles vs the AC240P's 6,451 kWh over 3,500
Why it mattersIgnore the per-kWh figure unless you're genuinely a whole-home, decade-long owner; otherwise compare the stickers.
continuous output
The AC240P's 2,400W and 3,600W surge already start a fridge or a tailgate blender, which is the whole job of a portable. The EP900's extra output only earns its keep feeding a subpanel, and its 9,000W solar (7.5 times the AC240P's 1,200W) is there to refill a whole-home bank, not top up a camp battery.
AC240P: 2,400W continuous, 3,600W surge, 1,200W solarEP900 + 2×B500: 7,600W continuous, 9,000W solar, surge headroom unpublishedThe EP900 is built to back a washer, dryer, heater, and refrigerator on one inverterB1
Why it mattersBuy the EP900 only if 'run the house on solar' is the actual goal; for anything you'd unplug and carry, the AC240P's output is already enough.
The specific dimensions that decide these two units — everything else is a tie.
Portability & Form Factor
Selected because: One is a 72-lb unit you carry; the other is a 343-lb system wired to your breaker panel. This is the axis that decides the matchup.
weight
The AC240P is 72 pounds of IP65-rugged portable, a solo lift, awkward and heavier than a packed checked bag, but it rides in a truck bed and shrugs off rain when the port covers are shutA1A2. The EP900 with two B500s is 343 pounds with no sockets on the box; it feeds your building through a subpanel and, once mounted, doesn't travel.
This is the axis the whole page turns on. One of these answers 'where do I need power today,' the other answers 'how do I keep the lights on when the grid drops,' and no amount of capacity moves a unit that's bolted to a wall.
Your Life, Your Pick
Selected because: The six use-cases expose the split: the EP900 can't join anything mobile, and the AC240P can't finish the biggest stationary jobs.
Read the six scenarios and the split is clean. The EP900 sits out Weekend Camping, Tailgate, and Van Life entirely, not on capacity but because it can't leave the panel it's wired to. Where it does compete, stationary and indoors, its 8,432 usable watt-hours make short work of an 8-hour blackout (1,645Wh) and a remote workday (910Wh), banking thousands of watt-hours either way.
The AC240P's story is the mirror image. It shows up everywhere, wins Tailgate and CPAP with margin to spare, then hits its ceiling: it covers about three-quarters of a 2,100Wh camping weekend and only a third of a 4,685Wh van-life day. It even misses the 8-hour blackout by 78Wh, a gap its 1,843Wh nameplate would clear but the flat 15% usable derate opens up. Trim one small appliance and it finishes. Load it like a house and it won't.
Lifetime Value
Selected because: The EP900 costs $10,298 to the AC240P's $1,462, yet pencils out cheaper per lifetime kWh ($0.17 vs $0.23), a number that only pays off at whole-home scale.
cost / lifetime kWh
The sticker gap is $10,298 against $1,462, and the per-kWh math famously runs the other way: the EP900 owns cheaper at $0.17 per lifetime kWh to the AC240P's $0.23, because 6,000 cycles across 9,920Wh spread its price over far more energy. That's a real number for exactly one buyer, the person who will actually pull tens of thousands of kilowatt-hours through it over its life.
Everyone else is quietly paying $8,836 more for capacity and a wall mount they don't need, and for them the AC240P's lower $0.79-per-watt-hour buy-in is the honest figure.
What the Specs Don't Tell You
Selected because: Weight, a 6- vs 10-year warranty, and 3,500 vs 6,000 cycles are where the portable-vs-installed gap shows up in the fine print.
rated cycles
The fine print favors the EP900 on longevity and the AC240P on access. The EP900 carries a 10-year warranty to the AC240P's 6 and 6,000 cycles to 3,500, so if you're keeping one machine for a decade the coverage and the cell life both point its way. Its UPS is rated a touch quicker too, no worse than 10ms against the AC240P's 15ms, both fast enough on paper for a router or a desktop, neither a lab result.
The AC240P counters where it counts for a portable: it's the one you can actually carry to wherever the power went out.
Strengths & trade-offs
BLUETTI AC240P
Strengths
- +Costs $8,836 less
- +Lighter by 271 lb
Trade-offs
- –Weaker inverter (-5,200W) limits appliance compatibility.
- –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 (+$8,836) than the AC240P.
- –Significantly heavier (+271 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
Neither unit
Neither gives you a powered weekend: the EP900 + 2×B500 has the energy but is wired to the building, and the AC240P covers about 75% of the 2,100Wh. One can't go; the other can't finish.
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
EP900 + 2×B500
The AC240P comes up just short — it needs 1,645Wh and has 1,567Wh usable, a 78Wh gap (its nameplate 1,843Wh actually clears this — the flat 15% conversion allowance is what tips it under). Trim that much — one small appliance's worth across the day — and it finishes. The EP900 + 2×B500 covers it outright with 6,787Wh to spare.
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
AC240P
A CPAP pulls about 40W, so 320Wh covers the night, and both of these clear that several times over. The AC240P alone banks around 1,247Wh of margin, nearly four more nights on one charge. Capacity was never the question. What settles it is that the AC240P is the right-sized, portable box you can actually set on the nightstand for $1,462, while the EP900 is a $10,298 installed system you can't move to your bedside and would never buy to run a 40-watt machine. For a night's medical load, the portable is the whole answer.
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
EP900 + 2×B500
The EP900 + 2×B500 clears the workday at 11% used, banking 7,522Wh — late work, extra calls, or a second laptop charge without arithmetic. The AC240P at 58% also finishes, with 657Wh 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
AC240P
The EP900 + 2×B500 is installed at the electrical panel — it backs up the building and doesn't leave it, so this scenario belongs to the AC240P by default — and it earns it, covering the 670Wh with 897Wh to spare. Capacity was never the EP900 + 2×B500'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
Neither unit
Neither gives you a powered van: the EP900 + 2×B500 has the energy but is wired to the building, and the AC240P covers about 33% of the 4,685Wh. One can't go; the other can't finish.
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: EP900 + 2×B500 runs 41.1h vs 7.6h.
$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
August 30, 2026
Verdict: the BLUETTI AC240P
Buy the AC240P if your power ever has to leave the house, which is why most people open a comparison like this. At 72 lbs and IP65-rugged, it handles the portable jobs a power station exists forA1A2, and it does it for $1,462. The EP900 with two B500s is a different machine: 343 lbs, 9,920Wh, wired into your electrical panel, and disqualified from anything you'd carry outside. It wins on raw capacity and even edges a lower cost per lifetime kWh, but that math only cashes out if you're backing a whole home on it for 16 years. If that is genuinely your plan, buy the EP900 and compare it against other installed systems. For everyone else, the EP900 isn't even eligible.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 30, 2026. The links below open BLUETTI's current price.
$1,461.99 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
or check the EP900 + 2×B500 price$10,298.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated August 30, 2026
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, Tailgating.
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, AC240P rates 3.9/5 (35th percentile of 27 Everyday-class units), and EP900 + 2×B500 rates 3.7/5 (21st percentile of 29 Whole-Home / Off-Grid-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
72 pounds you lift, 343 you never do
The AC240P is a 72-pound solo lift, awkward, heavier than a packed checked bag, but it goes in the truck. The EP900 stack is 343 pounds an electrician mounts once, and after install day its weight is the wall's problem, not yours. Two numbers pointing in opposite directions: 72 is the cost of taking your power with you, 343 is the cost of never having to move it again.
Fan Noise: Two Published Ratings
The AC240P is rated 45dB (like a running refrigerator), the EP900 + 2×B500 50dB (like moderate rainfall). Neither is a measurement on a shared bench — makers differ on whether they quote a best case or a figure under load, so a low number and a high one can describe the same machine at different moments. Take the pair as a prompt to find hands-on reports rather than as a gap you can act on. For most people, fan noise around 45dB and up is where sleep starts to suffer, and neither figure tells you what either unit does at a 40W draw.
UPS Switchover: ≤10ms vs ≤15ms
Both list a UPS mode, at different rated speeds. The EP900 + 2×B500 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The AC240P is rated ≤15ms — 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: 10 Years vs 6
The EP900 + 2×B500 is covered for 10 years against the AC240P's 6 years. The cheaper AC240P does buy more warranty per dollar (4.1 years per $1,000 against 1), but that is a statement about price, not about coverage — if a fault appears in year 7, only one of these is still covered. An underrated factor if you're keeping this unit for years.
The EP900 outlives it, by a lot
This is the AC240P's clearest loss. The EP900 stack is rated for 6,000 cycles to the AC240P's 3,500, which at daily use is 16.4 years against 9.6, and across its far larger pack that's about 59,520 kWh of lifetime energy versus 6,451. If you're buying a forever machine and will actually use the energy, that gap is real and it favors the bigger system. The catch is the 'actually use it' part: longevity you never draw on is just a number on the box.
Full record above — the Test Desk pick is the AC240P.
Check AC240P 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 AC240P is cheaper to buy, but the EP900 + 2×B500 is cheaper to own. At $0.17/kWh over its lifetime vs $0.23/kWh, the EP900 + 2×B500's higher cycle life and capacity make each dollar go further over the years.
Growth path
AC240P
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,843Wh.
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.
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 1,200W) 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 AC240P
Field reports on the AC240P are mostly about how well the ruggedness holds up. Reviewers left it out in a six-hour rainstorm and ran it around saltwater spray with no water getting inA2, with the standing caveat that the IP65 rating only holds when every port cover is closed. Plug a cable in and it's no longer rain-safeA1. It's positioned as the higher-capacity, 1,843Wh member of the AC240 platform with visible orange weatherproof styling, and the LFP pack and fast charge get consistent praiseA3A4. This is a newer unit, so most of what exists is reviewer testing rather than years of long-term ownershipA0.
“IP65 water- and dust-resistant, but the protection applies only when all port covers are closed; using it with cables plugged in compromises the rating, and it shouldn't be used in the rain that way.”
Sources
storagereview.com · backuppowerhub.com · makeuseof.com · techradar.com · fstoppers.com · bluettipower.com
BLUETTI EP900 + 2×B500
The EP900 platform reads as a whole-home system in every report. It's built to run a washer, dryer, heater, and refrigerator on one 9,000W inverter and to expand from 9.9kWh to about 39.6kWh with more B500 modulesB1B2. On the UPS, one owner said the switch from grid to battery during outages was completely unnoticeableB3, and another described going nearly off-grid on solar to minimize utility billsB4. Field data here is thin and skews to single owners and manufacturer guides rather than a broad baseB0, so weight it accordingly.
“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
- IP65 ruggedness proven in rain and saltwater, big expandability, and fast charging are the praise; the caveat is that water resistance only holds with port covers closed. [AC240P · 3 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
“IP65 water- and dust-resistant, but the protection applies only when all port covers are closed; using it with cables plugged in compromises the rating, and it shouldn't be used in the rain that way.”
storagereview.com / backuppowerhub.com — BLUETTI AC240/AC240P review · 2026 · [mixed]
- A2
“Real-world weatherproofing held up — left outside in a 6-hour rainstorm, water beaded off and the interior stayed bone dry; used on a sailboat with constant saltwater spray, no moisture intrusion after wiping down the exterior.”
makeuseof.com / techradar.com — AC240/AC240P review · 2026 · [positive]
- A3
“The 1,843Wh AC240P is the higher-capacity option, adding 307Wh over the standard AC240, with distinctive orange IP65 branding; a solid choice if you need the extra capacity and prefer the more visible design.”
techradar.com / fstoppers.com — AC240P review · 2026 · [positive]
- A4
“Premium end of BLUETTI's lineup; LFP battery, a fast charge reaching most of full quickly, and expandable to a very large multi-kWh bank.”
bluettipower.com / techradar.com — AC240P specifications · 2026 · [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 August 30, 2026.
Who Should Buy Which
Buy the AC240P if you…
- →You need power that moves: car camping, tailgates, a jobsite, or a blackout where you want to wheel it to the fridge and then set it by the bed.
- →You want something that survives weather. The AC240P's IP65 shell took rain and saltwater spray in stride with its covers closedA1A2.
- →Your real overnight or daytime needs sit under about 1,800Wh, a CPAP night, a workday, a tailgate, where its 1,843Wh has margin to spare.
Buy the EP900 + 2×B500 if you…
- →You're backing up a whole electrical panel, well pump, furnace, refrigerator, and the unit will be installed once and never movedB1.
- →You're going solar-primary and want a 9,000W input to shave the utility bill over the long haulB4.
- →You'll keep it a decade-plus and want the longer life it's built for: 6,000 cycles and a 10-year warranty.
If neither fits
If you need a mid-size portable in the 2-to-5kWh range, full-time van life or a genuinely off-grid weekend, neither fits: the AC240P covers only about a third of a 4,685Wh van day, and the EP900 can't leave the house. Look at a 2-to-4kWh portable, or a pair of them, instead. And if you're only here because BLUETTI's lineup is confusing, that's the real fork: decide portable-or-installed first, and the choice makes itself.
The Bottom Line
Buy the AC240P if your power ever has to move, which is why most people open a comparison like this in the first place. It's 72 pounds you can carry to wherever the outage or the campsite is, it handles the portable jobs a power station exists for, and it does it for $1,462. The EP900 with two B500s never enters those scenarios, because a system bolted to your breaker panel can't come with you.
The EP900 is the better machine only on the terms it's built for: whole-home capacity, a decade of life, and solar that can carry a house. If that's genuinely your plan, take it, and go compare it against other installed systems rather than a portable. For everyone else, the EP900 isn't even eligible, and the AC240P wins by simply being able to show up.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the EP900 with two B500s be used as a portable power station?
No. It's a 343-pound system that an electrician wires into your electrical panel, with no sockets on the unit itself, and it isn't meant to be moved. If you need power you can carry, that's the AC240P.
Will the AC240P get my house through an outage?
For a room's worth of essentials, largely yes; for the whole house, no. It clears a CPAP night many times over and covers a tailgate, but it lands about 78Wh short of a full 8-hour blackout load of 1,645Wh once you account for the usual 15% usable derate. It's a single-room bridge, not a whole-panel backup.
Why is the EP900 system cheaper per kWh yet so much more expensive?
Its 6,000 cycles over 9,920Wh spread the price across roughly 59,520 kWh of lifetime energy, which pencils out to $0.17 per kWh versus the AC240P's $0.23. That only helps if you actually use that much energy over 16 or so years. Upfront it's $10,298 against $1,462.
Which is better for camping or van life?
The AC240P, because the EP900 can't leave your house. Just know its ceiling: it covers about a third of a heavy 4,685Wh van-life day, so for full-time van power you'd want more capacity or a second unit.
Is the AC240P actually weatherproof?
In testing it shrugged off a six-hour rainstorm and saltwater spray with no intrusion, but the IP65 rating only holds with all the port covers closed. Plug cables in and it's no longer rain-safe, so don't run it uncovered in a downpour.
Where to buy
BLUETTI AC240PPick
$1,461.99
$1,461.99 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
BLUETTI EP900 + 2×B500
$10,298.00
$10,298.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.