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Bluetti Elite 400 sizing guide
Bluetti's own billed as the lightest 3.8 kWh station on the market — a non-expandable, sealed unit undercutting the EcoFlow DELTA Pro and Anker SOLIX F2600 on price/capacity; part of the new Elite series alongside the existing elite-300/elite-100-v2/elite-200-v2. Here's exactly what it runs, how long, and which outages it covers — computed, not marketed.
AC+solar combined 0-80% in 70 min (2,800 W); AC-only full in 2.5 h; solar max 1,000 W · 86 lb · 4× AC, 2× USB-A, 2× USB-C, 1× DC car port.
What the Elite 400 runs — and for how long
| Appliance | Running | Runs it? | Approx. runtime |
|---|---|---|---|
| Refrigerator (modern) | 150 W (1,200 W surge) | yes | ~66 h |
| Chest Freezer | 100 W (1,000 W surge) | yes | ~99 h |
| CPAP Machine (no humidifier) | 40 W | yes | ~86 h |
| CPAP with Heated Humidifier | 60 W (95 W surge) | yes | ~72 h |
| Oxygen Concentrator | 350 W (600 W surge) | yes | ~9.9 h |
| Space Heater (1500 W) | 1,500 W | yes | ~2.3 h |
| Window AC (8,000 BTU) | 715 W (1,250 W surge) | yes | ~6.9 h |
| Window AC (12,000 BTU) | 1,100 W (1,800 W surge) | yes | ~4.5 h |
| Gas Furnace Blower (1/2 HP) | 800 W (2,350 W surge) | yes | ~8.6 h |
| Microwave (1000 W cooking) | 1,200 W | yes | ~2.9 h |
| Sump Pump (1/3 HP) | 800 W (1,500 W surge) | yes | ~22 h |
| Sump Pump (1/2 HP) | 1,050 W (2,150 W surge) | yes | ~16 h |
| Well Pump (1/2 HP) | 1,000 W (2,100 W surge) | yes | ~23 h |
Runtime uses each load's duty-weighted average draw against 90% of the rated capacity — conservative on purpose. Cyclic loads (fridges, pumps) run far longer than running-watts × capacity would suggest.
Outages the Elite 400 covers
Common questions
What can the Bluetti Elite 400 run?
With 2,600 W of continuous output and a 3,900 W surge rating, the Bluetti Elite 400 runs refrigerator (modern), chest freezer, cpap machine (no humidifier), cpap with heated humidifier, oxygen concentrator, space heater (1500 w), and more. Its 3,840 Wh battery sets how long: a fridge for roughly a day, a CPAP for several nights.
How long will the Bluetti Elite 400 run a refrigerator?
A modern refrigerator averages about 53 W (it cycles ~35% of the time), so the Bluetti Elite 400's 3,840 Wh runs one for roughly 66 h before recharging.
Specs: Manufacturer published specifications (approximate; confirm on the current product page) (compiled 2026-10-05). Informational only — a computed sizing estimate from published appliance-wattage charts and manufacturer station specs. It is not an electrical guarantee. For hardwired or whole-home backup, transfer switches, or any permanent install, consult a licensed electrician.