Photo from the manufacturer
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The Apex 300 is a LiFePO4 battery power station that plugs into a wall outlet like its portable siblings, but it's built to stay put and grow: up to six B300K or B300/B300S batteries connect to the main body and push total capacity well beyond five kWh, with the option to add units over time instead of buying everything at once. It responds to a power outage on its own, switching to battery power fast enough that whatever was running stays running, computers included.
In daily use it exchanges energy with the grid, the sun and a generator, and it can charge and discharge at the same time; the BLUETTI app manages charging modes, monitoring and firmware updates, even across multiple connected units. With additional batteries stacked, it's best to secure them to the wall with metal brackets.
On its own it's at the limit of what one person can lift, and each expansion battery is a second weight of the same order: it's not something to load into a car for the weekend, but a block that gets positioned once and left where it is, in a utility room or garage. It's the choice for anyone who wants to start with a mid-sized capacity and expand it battery by battery, without the constraint of a fixed connection; anyone looking for energy to carry around should look at the lighter power stations in the same range.
Highest technical score among the 4 sheets in the High capacity category (room-sized tier): 67/100.
How we assign awards →official manufacturer list price — on nominal capacity
| Parameter | Value | Source |
|---|---|---|
| Dimensions | 52.5 × 32.7 × 32 cm (20.7 × 12.9 × 12.6 in) | manufacturer website |
| Weight | 38.0 kg (83.8 lb) | manufacturer website |
| Nominal capacity | 2.7648 kWh | Declared by the brand |
| Cell chemistry | LFP (lithium iron phosphate) | Declared by the brand |
| Expandable | Yes | Declared by the brand |
| Maximum expanded capacity | 21.1968 kWh | Declared by the brand |
| Continuous output | 3840 W | Declared by the brand |
| Peak output | 7680 W | Declared by the brand |
| Maximum solar input | 2400 W | Declared by the brand |
| Backup power | UPS | Declared by the brand |
| Switchover time | 20 ms | Declared by the brand |
| Rated cycles | 6000 cicli | Declared by the brand |
| Capacity at end of cycle life | 80 % | Declared by the brand |
| Warranty | 2 anni | Declared by the brand |
| Standby consumption | 20 W | Declared by the brand |
| Ingress protection | IP20 | Declared by the brand |
| Mounting | Portable | Declared by the brand |
| Official list price | 1999 € | Declared by the brand |
| Usable capacity | — | Not declared |
| Depth of discharge | — | Not declared |
| Cell supplier | — | Not declared |
| Peak duration | — | Not declared |
| AC outlets | — | Not declared |
| Fastest USB-C | — | Not declared |
| Maximum charge power | — | Not declared |
| 0–80% charge time | — | Not declared |
| Guaranteed throughput | — | Not declared |
| Guaranteed remaining capacity | — | Not declared |
| Round-trip efficiency | — | Not declared |
| Minimum temperature | — | Not declared |
| Maximum temperature | — | Not declared |
| Cell heating | — | Not declared |
| Noise level | — | Not declared |
| Wheels and handle | — | Not declared |
| Works without internet | — | Not declared |
| Local control | — | Not declared |
| Open protocols | — | Not declared |
| Home Assistant integration | — | Not declared |
| Where the data is hosted | — | Not declared |
| Remote updates | — | Not declared |
| App required for setup | — | Not declared |
| Declared standards | — | Not declared |
The rest of the data comes from one page on the manufacturer's site, cited row by row in the table above.
A manual or a datasheet counts as a source even when the original file is hosted elsewhere: what matters is the document, not the server. Where that happens, it is stated above.
These numbers are calculated, not stated: they have no source to cite, they have a formula you can redo. The price used is the manufacturer's list price, which is stable and the same in every country — not a shop's price on the day.
Chosen by the declared use tier and footprint, not by price: we don't publish prices.
