BLUETTI Apex 300 · Modular Home Battery Backup
3,840 Watts of Power, Built to Grow With You
The Apex 300 starts as a 2,764.8Wh, 3,840W power station — enough to run a fridge, routers, and essential circuits through an outage — and scales into a full home backup system as needs grow, up to 58kWh and 11.52kW with add-on batteries. It switches to battery power in 0ms, runs 120V and 240V loads at the same time, and is backed by a 5-year manufacturer’s warranty.
What Makes the Apex 300 Different
3,840W Continuous Output
Rated for 3,840W continuous with up to 7,680W of lifting power for motor starts and other brief surges.
120V + 240V, at the Same Time
Runs both voltages simultaneously — even while charging — instead of forcing a choice between one or the other.
0ms UPS Switchover
Switches to battery power fast enough to keep CPAPs, routers, and other sensitive electronics running without a blip.
Scales to 58kWh / 11.52kW
Connect up to 3 units and 18 expansion batteries on the same platform — start small, grow into whole-home backup.
6,000+ Cycle Life
EV-grade LiFePO₄ cells rated for an estimated 17-year lifespan at 80% capacity retention.
12kW Bypass Capacity
Passes through enough power for HVAC systems, EV chargers, and other heavy household loads.
App Control, Storm Alerts
The BLUETTI app monitors status remotely, sends early extreme-weather alerts, and preps the system automatically.
MIL-STD-810G Tested
Military-grade durability testing on top of UL, CE, FCC, and RoHS safety certification.
One Base Unit, Built Like Building Blocks
The Apex 300 on its own is a capable 3,840W power station — but the platform is designed to expand rather than be replaced. Add B300K or B500K expansion batteries for more storage, connect additional Apex 300 units in parallel for more output, and pair with a SolarX 4K controller for solar charging or a Hub D1 for extra USB and DC ports. The system scales from a single-unit backup to a full home setup covering 58kWh and 11.52kW without switching to a different product line.
Efficiency is built into the base unit itself: a magnetic-core transformer and five-stage efficiency system (BLUETTI calls it EnerBalance AI) keep idle power loss to around 20W, roughly 2–3× lower than typical for this class. Charging is flexible too — AC wall power, a car/alternator connection, a generator at up to 11.5kW, or solar through the SolarX 4K accessory — so the battery isn’t tied to one recharge method.
Full Specifications
Capacity & Output
| Battery capacity | 2,764.8 Wh |
| Chemistry | LiFePO₄ (EV-grade) |
| Continuous output | 3,840 W |
| Lifting (surge) power | 7,680 W |
| Output voltage | 120V + 240V simultaneous |
| AC outputs | 6 × 120V ports |
Charging
| AC wall charging | Included cable |
| Car/alternator charging | Included XT60 cable |
| Generator input | Up to 11.5 kW (120V/240V) |
| Solar input (with SolarX 4K)* | Up to 19.2 kW |
| UPS switchover | 0ms (up to 20ms by mode) |
Efficiency & Durability
| Cycle life | 6,000+ @ 80% retention |
| Estimated lifespan | ~17 years |
| Idle power loss | ~20 W |
| Bypass capacity | 12 kW |
| Durability testing | MIL-STD-810G |
Physical & Environmental
| Weight | 83.78 lbs |
| Dimensions (L×W×H) | 20.67 × 12.87 × 12.6 in |
| Storage temperature | -4°F to 104°F |
| Water resistance | Not rated — keep dry |
| Warranty | 5 years |
*BLUETTI’s own marketing shows two different figures for SolarX 4K solar input — 19.2kW in one place, 30kW in another, on the same page. Used the more conservative number; worth confirming current spec before publishing. Certifications: UL, CE, FCC, RoHS.
What’s In the Box
- Apex 300 power station×1
- AC charging cable×1
- Car charging cable (XT60)×1
- Grounding screw (M5×10)×1
- User manual×1
Common Questions
Is the Apex 300 waterproof?
No. It should be kept dry during use — it’s not rated for direct rain or water exposure.
What’s the maximum capacity I can reach?
Up to 58kWh of storage and 11.52kW of output by connecting 2–3 Apex 300 units with up to 18 expansion batteries total — scaling from a single-unit backup to a full home system on the same platform.
Does it charge from solar panels directly?
Not on its own — the Apex 300 doesn’t have a built-in solar charge controller. Solar charging requires the separate SolarX 4K accessory.
How can I recharge it?
Several ways: AC wall power (cable included), a car or alternator connection (XT60 cable included, with Charger 1 or Charger 2 available for faster alternator charging), a generator at up to 11.5kW, or solar through the SolarX 4K accessory.
Are there add-ons available?
Yes — expansion batteries (B300K, B500K), the SolarX 4K solar controller, Hub D1 for extra ports, and Hub A1 or an AT1 panel for parallel connections and home panel integration.
What’s the warranty?
5 years, covering defects in materials, workmanship, and performance.
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