Bluetti Apex 300

Name: Bluetti Apex 300
Brand: Bluetti
Price: 1529 USD
Availability: InStock

~$1,529approx. list price

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800 WLights, phones, router, a CPAP
2,200 WFridge, freezer and the essentials
4,000 WFurnace blower, sump pump or a window AC
7,500 WWell pump or a small central AC
18,000 WWhole home with central air

3,840 W running, 7,680 W surge — sustains the fridge, freezer and the essentials tier and everything below it.

Best forWell-pump and workshop owners who want 240V muscle now and massive expansion optionality later.

Bluetti's 2025 modular flagship and their real answer to the F3800 Plus: 3,840W continuous (7,680W surge) with simultaneous 120/240V output, black-start capability, and expansion to a frankly absurd 58kWh using the same B300K packs the AC200L takes. The 6,000-cycle cells carry a claimed 17-year lifespan. Pro reviewers praise how confidently it starts well pumps and RV air conditioners, and the $1,529 street price undercuts every 240V-capable rival. Owner-reported quirks skew new-platform: firmware updates have both fixed and broken things, an RV owner found the SolarX 4K controller will not run alongside the Hub D1, and 83.8 lbs with no built-in wheels makes the optional trolley basically mandatory. Fan noise under heavy charge is present but better-mannered than older AC-series units. The ecosystem bet looks smart if Bluetti keeps shipping the promised add-ons.

From the spec sheet

Specifications

Battery capacity: 2,765 Wh
Expandable to: 58,000 Wh
Continuous output: 3,840 W
Surge output: 7,680 W
Runtime: Fridge (~150W): ~15.5 hrs on base unit

Type: Power Station
Fuel: Battery (LiFePO4)
Outlets: 6x AC: 4x NEMA 5-20R, TT-30R, NEMA 14-50R; USB-C, USB-A and 12V only via the optional Hub D1
Transfer-switch ready: Yes
Weight: 83.8 lbs
Warranty: 5-year
Model: Apex 300

3,840W + 240V output·Expandable to 58kWh·6,000-cycle cells

At a glance

Strengths

+3,840W/7,680W surge starts well pumps and RV ACs that stall 3kW units
+Simultaneous 120/240V output without pairing units
+Expands to 58kWh with cheap, cross-compatible B300K packs
+2,400W native solar input, up to 19.2kW with SolarX controller
+Black-start: can bootstrap itself from empty via solar
+Undercuts F3800 Plus and Delta Pro 3 at $1,529

At a glance

Drawbacks

−83.8 lbs with no wheels - trolley accessory is effectively required
−New platform: firmware updates have both fixed and broken things for owners
−Key ecosystem accessories launched late or remain scarce
−Fan noise under max charge still very much present

Summarised from owner discussions and forums

Owner insights

The Apex 300 puts 240V backup on a transfer switch or interlock without buying two boxes, and owner setups range from one unit and a B500K on an interlock to three units, a Hub A1 and 94kWh of packs that one owner says run the house for four days. The solar input and the accessory web around it are where owners hit limits.

Owners put the 14-50 with its 120/240 selector to work for interlock backup, 50A bypass and fast generator charging once the selector is set to 120/240. The solar side is narrower than buyers expect: two XT60 inputs capped at 60V each push anyone with residential panels toward parallel wiring, buck converters or the SolarX 4K, and that controller then contends with the Hub D1, which carries the USB and 12V outputs. Reliability reports from late 2025 into 2026 include several dead or half-working units and cloud dropouts while charging from solar, and firmware updates have broken things for some owners. An owner with two units found the fans too loud for an apartment.

Reusable AC300 or AC500 packs make a strong case for it, since it offers 240V now and a path to more units and batteries later. An AC500 owner weighed it against adding a second AC500 for split phase; other buyers weigh it against an AC200L with a B500K for about $600 less, and against the EcoFlow DELTA Pro 3, which carries more capacity in the base unit. Anyone with a large high-voltage array or a van that needs heavy 12V should price the SolarX 4K, Hub D1 and Charger 2 in from the start.

What owners like

+120V and 240V from one box through a NEMA 14-50 with a voltage selector, so an owner now feeds a transfer panel or interlock without the bridging adapter and shut-off-every-240V-breaker routine a 120V-only station forced
+Units tie together on a Hub A1 for whole-house backup: an owner runs nine of the most-used circuits including the well pump and water heater on about 25kWh at 240V/50A, and another with three units and 94kWh of packs says it runs the house for four days
+Bypass on the 14-50 is rated at up to 50A at 120V or 240V, about 11,000W of grid or generator power passing through at 240V, far more than the 3,840W the inverter makes on its own
+Charges hard from a 240V generator: an owner feeding it from a Honda EU6500 over a 50A cable saw about 3,800W once the selector was set to 120/240, against roughly 2,000W on 120V alone, though it fell back toward 2,000W around 75%
+Built to grow piece by piece: an owner has built up to 15 B500K and 3 B300K packs across three units and plans more, and Bluetti says the B300, B300S and B300K packs AC300 and AC500 owners already have will connect; another owner pairs it with an original B300
+The AT1 Smart Distribution Box automates peak shaving: one PG&E customer grid-charges off-peak, lets the AT1 move higher-draw appliances to the battery in the evening peak, and holds a 30% reserve for overnight outages
+An EV-charger cable lets it refill at public charging stations, the deciding point for a buyer who lives in a van and picked it over a Jackery, though an owner found the AC outputs switch off while it charges that way

Common complaints

−USB and 12V outputs live on the separate Hub D1 rather than the unit, and the D1 brings its own snags: an RV owner notes the SolarX 4K will not work while the D1 is in use, and another could not get the D1 to show in the app once it was chained after two B300K packs
−Each of the two XT60 solar inputs stops at 60V (1,200W, 20A), which rules out common series strings: it stopped an owner with 64.7V SunPower panels, an RV owner with a 68V array and an AC300 owner with three-in-series 410W strings, and the ways around it are parallel wiring, a buck converter or the SolarX 4K at about $700
−240V on battery tops out at 16A per unit (3,840W), so the 14-50 does not deliver 50A without the grid: two units are needed for 30A at 240V and three for 50A
−Early failures show up repeatedly from late 2025 into 2026: units dead out of the box and cycling off every few seconds, two units in an owner's three-unit system that went dark after reaching 100%, one stuck flashing the AC light and refusing charge, and eBay refurbs with a near-daily BMS fault or that died at 30 days
−Support speed varies: owners report waiting days or a week for a first response, while one who got an RMA praised the repair turnaround but warns warranty terms lean on shipping back in the original box
−Remote access drops while solar is feeding it: an owner loses the cloud connection whenever the SolarX 4K is outputting, another until the panels are unplugged
−Firmware updates have changed behaviour: after one update a B300K vanished from the app's component list, and another owner's array fell to 212W on the Apex after recent updates while the same panels gave 592W on an Elite 200
−83.8 lbs with no wheels, and Bluetti support advised an owner of three units against stacking Apex units on each other because of cooling; an owner found the Foldable Trolley 2 pricey and is wary of its plastic wheel hubs and levers
−Idle drain can run above the advertised 20W: an owner saw about 1% an hour, close to 30W, with the unit on but AC and DC outputs off, and another found it shuts itself off after four hours in that state

Questions owners ask

How many Apex 300 units do I need for a 30A or 50A 240V inlet?

On battery, one unit delivers 240V at up to 16A, the full 3,840W. One owner points out that a true 30A at 240V takes two units and 50A takes three, joined through the Hub A1. A single unit still works on a 240V inlet with an interlock if you keep the total load under its rating.

Which solar panels can I connect without the SolarX 4K?

Each of the two XT60 inputs takes up to 60V open-circuit, 20A and 1,200W, and owners plan around the 60V figure rather than test it. Large residential panels leave little room: by one owner's arithmetic, 440W panels at over 32V and 14A allow only one per input. Cold weather raises Voc, so check winter voltage.

Do I need the Hub D1, and can I use it with batteries and the SolarX 4K?

Yes for any USB or 12V loads, since Bluetti puts the USB-C, USB-A, RV port and 12V sockets on the Hub D1. An owner chained the D1 off the last port of the last B300K in the stack, and an RV owner notes the SolarX 4K will not run while the Hub D1 is in use, which matters for RV builds that want high-voltage rooftop solar and 12V loads.

Does it switch over fast enough for sensitive electronics?

Not always in standby mode. One owner expected an online UPS mode but could not move the app off standby UPS, and a midnight flicker got through to attached equipment. An owner running through the Hub A1 reports about 20ms failover, with lights flickering but no electronics restarting.

Can I stack Apex units and batteries?

Pictures online show each Apex on top of a stack of packs, but Bluetti support advised an owner with three units against stacking Apex units on each other because of cooling. The included 90-degree short expansion cable limits side-by-side layouts; an owner with a 17-inch height limit could not find a longer one on Bluetti's site, though Bluetti has said a longer cable is sold as an optional accessory.

Can I charge it from 120V while running 240V loads?

Yes, but Bluetti's own answer was that a 120V input cannot sustain 240V loads, so the battery makes up the difference until it runs down, and it recommends a 30A or 50A cable for steady 240V use. An owner charging from a generator over a 50A cable saw the rate roughly double, from about 2,000W to 3,800W, once the selector was set to 120/240.

Head to head