EcoFlow DELTA Pro 3
76BatteryRank score · Excellent
← CompareCheck price on Amazon 
Check price on Amazon
EcoFlow DELTA Pro 3 vs Fossibot F2400
Decision readout
Better station
EcoFlow DELTA Pro 3 leads by 29 points overall.
Fossibot F2400
47BatteryRank score · Limited
What changes the decision
- Home backup: EcoFlow DELTA Pro 3 — more AC-delivered capacity and higher AC output
- Camping & RV: Fossibot F2400 — lighter and easier to carry
By the BatteryRank Engineering Team
Our buying analysis
Do you need a portable appliance battery or a home-backup platform?
A refrigerator, router and a few lights make a different purchase from backing up household circuits. We would settle that question before comparing scores. Otherwise, the larger system can look like an automatic upgrade even when its size and connection requirements add little to the job you need done.
The trade-off we would make
The DELTA Pro 3’s US split-phase output and larger storage make it a candidate for a planned home-backup installation. The F2400 belongs in the conversation when plug-in appliances fit its output and energy limits. We would judge the Fossibot against that smaller job, rather than treating the absence of a home-integration platform as a failure.
Before you choose
For any household-circuit connection, establish the installation and transfer-equipment plan with a qualified electrician. For a plug-in appliance, check continuous watts and startup demand separately. A boosting mode for resistive loads does not establish motor-start compatibility, and a capacity advantage still needs a real load plan to become a runtime advantage.
Follow the evidence in the specification table below, or read our EcoFlow DELTA Pro 3 review and Fossibot F2400 review.
01 · Score evidence
Score breakdown
76
EcoFlow DELTA Pro 3
Overall
47
Fossibot F2400
87
POWER
EcoFlow DELTA Pro 3 +37
50
Battery-side usable capacity and how much you can run at once.
74
TRUST
EcoFlow DELTA Pro 3 +12
62
Owner reputation, safety record, warranty, and build durability.
N/A
CHARGING
Incomplete data
23
Wall and solar recharge speed.
27
LIVABILITY
Fossibot F2400 +26
53
Lightweight, portable, and quiet enough to live with.
Computed from sourced data with a published, price-independent formula. Scores are relative to each model's size class.
02 · Usable energy
Capacity truth
The watt-hours on the box aren't what reaches your devices. Same scale, both units.
EcoFlow DELTA Pro 3
Rated (on the box)
4,096 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
AC deliveredmeasured
3,790 Wh. Show source
verified source3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated2026-07-043790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated · 7% below the label
Fossibot F2400
Rated (on the box)
2,048 Wh. Show source
claimed sourcefossibot.com ↗2026-07-04The marketing number — total cell capacity.
AC delivered (est.)
1,741 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
03 · Same assumptions
Same-device runtime
| Device | EcoFlow DELTA Pro 3 | Fossibot F2400 | Assumption |
|---|---|---|---|
| CPAP (humidifier off) | about 52.6 nights | about 24.2 nights | 9 W · |
| CPAP (heated humidifier on) | about 8.5 nights | about 3.9 nights | 56 W · |
| Refrigerator (full-size) | about 60 hours | about 28 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 211 hours | about 97 hours | 18 W · |
| Laptop (65W charger) | about 117 hours | about 54 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 189 full charges | about 87 full charges | 20 W · |
One device at a time; estimates use each station's usable AC energy. Build your own load →
04 · Sourced hardware
Key specs, side by side
| Spec | EcoFlow DELTA Pro 3 | Fossibot F2400 |
|---|---|---|
| AC-delivered capacity | 3,790 Whverified. Show sourceverified source3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated2026-07-04 | 1,741 Whest.. Show sourceestimated sourcefossibot.com ↗2026-07-04 |
| Continuous power output | 4,000 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 2,400 W. Show sourceclaimed sourcefossibot.com ↗2026-07-04 |
| Surge power output | 8,000 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 4,800 W. Show sourceclaimed sourcefossibot.com ↗2026-07-04 |
| Max solar input | 2,600 W. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 500 W. Show sourceclaimed sourcefossibot.com ↗2026-07-04 |
| AC charge time (0–100%) | — | 120 min. Show sourceclaimed sourcefossibot.com ↗2026-07-04 |
| Weight | 51.5 kg. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 22 kg. Show sourceclaimed sourcefossibot.com ↗2026-07-04 |
| Rated cycle life | 4,000 cycles. Show sourceclaimed sourceus.ecoflow.com ↗2026-07-04 | 3,500 cycles. Show sourceclaimed sourcefossibot.com ↗2026-07-04 |
Manufacturer figures unless marked verified or est. Tap or focus a figure to view its source. The better reading in each row is highlighted — lower wins for weight and recharge time.
Where these rank
- EcoFlow DELTA Pro 3 #1 of 10 in Best for RV & Van Life · #2 XL / home backup in Best Portable Power Stations
Quick answers
- Is the EcoFlow DELTA Pro 3 better than the Fossibot F2400?
- EcoFlow DELTA Pro 3 leads by 29 points overall.
- Which has more usable capacity, the EcoFlow DELTA Pro 3 or Fossibot F2400?
- The EcoFlow DELTA Pro 3, by 2,049 Wh — 3,790 Wh versus 1,741 Wh, a 118% advantage. At a 60 W load that is roughly 34.2 extra hours before the battery is empty. Both figures are estimated AC-delivered energy, not the nameplate battery rating — the watt-hours that actually reach your devices, which is always less than the number on the box.
- Which has more AC output, the EcoFlow DELTA Pro 3 or Fossibot F2400?
- The EcoFlow DELTA Pro 3: 4,000 W versus 2,400 W continuous. That gap matters only if a load sits between the two numbers — below 2,400 W both run it, above 4,000 W neither does. Surge headroom follows the same order: 8,000 W against 4,800 W, and surge is what decides whether a compressor or pump actually starts.
- How does runtime compare between the EcoFlow DELTA Pro 3 and Fossibot F2400?
- On the same sourced load — a refrigerator (full-size) — the EcoFlow DELTA Pro 3 runs longer: 60.2 hours against 27.6. These are planning estimates from each model's AC-delivered capacity, not stopwatch tests; real duty cycle and temperature move them.
- Which is lighter, the EcoFlow DELTA Pro 3 or Fossibot F2400?
- The Fossibot F2400, by 29.5 kg (22 kg versus 51.5 kg). Both weights are manufacturer figures for the bare unit; cables and a solar panel add to whatever you actually carry.
- Which model should I buy for my use case?
- On the sub-scores that describe each use case: the EcoFlow DELTA Pro 3 for home backup; the Fossibot F2400 for camping & rv. They split, so the honest answer depends on which of those you are actually buying for.
Keep deciding
- Full scorecard, specs & price for EcoFlow DELTA Pro 3 →
- Full scorecard, specs & price for Fossibot F2400 →
- See more alternatives to EcoFlow DELTA Pro 3 →
- See more alternatives to Fossibot F2400 →
- What size do you need? →
- Browse all rankings →
- Check device runtime evidence →
- Compare outage and trip load plans →
- Browse complete power kits →
- Capacity vs output explained →
- Battery cycle-life thresholds →
- UPS behavior explained →