Bluetti Apex 300: runtime & specs
2,765 Wh · 3,840 W continuous AC · 2,400 W max solar input · LFP (LiFePO4). Specs below are the manufacturer's published figures — continuous and surge watts are separate numbers here, because they are separate numbers in reality.
Manufacturer specifications
| Capacity | 2,765 Wh |
|---|---|
| Maximum capacity with expansion | 19,354 Wh |
| AC output (continuous) | 3,840 W |
| AC output (surge) | 7,680 W |
| Boost mode | — |
| Maximum solar input | 2,400 W |
| Solar input voltage range | 12-60V (2 ports) |
| Battery chemistry | LFP (LiFePO4) |
| Cycle life | 6,000 cycles to 80% capacity |
| AC charging input (max) | 3,840 W |
| Weight | 83.78 lbs |
Source: manufacturer product page · pulled 2026-10-19. Expansion: Up to 6 x B300K / B300S / B300 expansion batteries. If a row says "not published", the manufacturer doesn't publish that figure in the source we retrieved — we leave it blank rather than guess.
View on the manufacturer's site
What it runs, and for how long
Estimates use our published formula — capacity × 0.85 ÷ load, duty cycle applied to cycling loads, and a start check against the surge rating (methodology). Loads that fail the start check are marked, not given a fake runtime.
| Load | Estimated runtime |
|---|
Try your own load
Bluetti Apex 300 questions
How long will the Bluetti Apex 300 run a refrigerator?
About 8.4 hours for a typical fridge at a 40% compressor duty cycle (700 W nameplate draw while running), using our standard formula: 2,765 Wh × 0.85 ÷ 280 W average. That is the duty-cycled figure; the same station runs the fridge for about 3.4 hours if the compressor never cycles off.
How long will it run a CPAP?
About 58.8 hours at 40 W — a typical CPAP without a heated humidifier — or roughly 7.3 nights at 8 hours a night. With a heated humidifier (~90 W) expect about 26.1 hours. That's device runtime math only; see the CPAP calculator for your device's actual wattage.
How long does it take to recharge from solar?
With 400 W of panels, the Bluetti Apex 300 needs about 8.9 hours of full sun for a full charge after the 0.78 real-world derate. Try other panel sizes in the solar charging calculator.
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