BLUETTI Apex 300 vs. EcoFlow DELTA Pro 3
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Top picks at a glance
Best for an all-in-one 240V unitEcoFlow DELTA Pro 3Check price on Amazon
Best for solar and RV hookupsBLUETTI Apex 300Check price on Amazon
The EcoFlow DELTA Pro 3 is the more complete 240V station: it stores 4,096 Wh in one unit, lists an 8,000 W surge, an IP65 rating, a 10 ms switchover, and 2,600 W of solar input. The BLUETTI Apex 300 makes sense if you have a 50 A RV or need to move the unit, since it has a NEMA 14-50R outlet and weighs about 30 lb less.
We pulled the numbers from BLUETTI’s and EcoFlow’s US product pages, our earlier spec-based DELTA Pro 3 review, and one FAQ on BLUETTI’s Amazon listing, all checked in November 2026. We have not set up or tested either system.
EcoFlow DELTA Pro 3: the self-contained home battery
EcoFlow DELTA Pro 3
- Capacity
- 4 kWh
- AC output
- 4,000 W
- Voltage
- 120V and 240V
- Expansion
- Up to 12 kWh per unit
Who it's for: Homeowners who want 120V and 240V backup and may add batteries over time.
Strengths
- Expands to 12 kWh on one unit, more as a multi-unit system
- 120V and 240V output
- Rated to keep 80% capacity after 4,000 cycles
Weaknesses
- Lower continuous output than the F3800 Plus
- More capacity than small essential loads need
The DELTA Pro 3 holds 4,096 Wh and delivers 4,000 W at 120V and 240V. X-Boost raises output to 6,000 W for suitable loads, and EcoFlow lists an 8,000 W surge. One unit expands to 12 kWh, and its battery is rated for 4,000 cycles to 80% capacity.
It takes 2,600 W of solar, lists a 10 ms UPS switchover, and carries an IP65 water and dust rating. It works from 14°F to 113°F and charges from 32°F, and the warranty is 5 years.
Its weight is the issue: 113.54 lb needs a permanent spot, and 4 kWh is more than a few small essentials need. It also discharges only down to 14°F.
BLUETTI Apex 300: lighter, with RV-ready outlets
BLUETTI Apex 300
- Capacity
- 2,764.8 Wh
- AC output
- 3,840 W
- Solar input
- 2,400 W
- Weight
- 83.78 lb
Who it's for: Home backup and RV owners who want 240V output, a 50 A RV outlet, and room to add batteries.
Strengths
- 120/240V output through a NEMA 14-50R outlet
- Expands with up to 6 B300K batteries
- Two solar inputs, 2,400 W in total
Weaknesses
- USB and DC ports need the separate Hub D1
- Heavy at 83.78 lb
The Apex 300 trades capacity for flexibility. It holds 2,764.8 Wh of LiFePO4 rated for 6,000+ cycles to 80% of original capacity, and delivers 3,840 W of pure sine wave power with 7,680 W of lifting power. Its outlets are four 20 A, a NEMA TT-30R at 120V/30 A, and a NEMA 14-50R at 120/240V and 50 A.
Two solar inputs take 1,200 W each, 2,400 W combined, and Turbo Charging accepts up to 3,840 W, reaching 80% in 45 minutes at 59-77°F. It adds up to 6 B300K, B300S, or B300 batteries per unit and discharges down to -4°F.
The drawbacks: USB, car, DC5521, and Anderson ports all need the separate Hub D1, rated at 700 W. It weighs 83.78 lb, and BLUETTI doesn’t list a switchover time.
How do the specs compare?
| DELTA Pro 3 | Apex 300 | |
|---|---|---|
| Capacity | 4,096 Wh | 2,764.8 Wh |
| Battery rating | 4,000 cycles to 80% | 6,000+ cycles to 80% |
| AC output | 4,000 W, 6,000 W X-Boost | 3,840 W, 7,680 W lifting power |
| Listed surge | 8,000 W | Not listed |
| 240V | Yes | Yes, via NEMA 14-50R |
| Solar input | 2,600 W | 2,400 W |
| Expansion | 12 kWh on one unit | Up to 6 B300K, B300S, or B300 |
| UPS switchover | 10 ms | Not listed |
| Water and dust rating | IP65 | Not listed |
| Lowest discharge temperature | 14°F | -4°F |
| Weight | 113.54 lb | 83.78 lb |
How far does each base unit go?
With 85% of capacity reaching your loads, the DELTA Pro 3 delivers about 3,481.6 Wh and the Apex 300 about 2,350.08 Wh. A steady 600 W, such as a fridge, a freezer, a furnace blower, and lights, would run about 5.8 hours against 3.9 hours before any added batteries. The Apex 300 stores about 33 Wh per lb and the DELTA Pro 3 about 36.1 Wh per lb.
How to choose
- The most backup from one box: the DELTA Pro 3, with 4,096 Wh.
- A 50 A RV plug: the Apex 300 has a NEMA 14-50R outlet.
- Moving it now and then: the Apex 300 weighs 83.78 lb against 113.54 lb.
- Wet or dusty locations like a carport: the DELTA Pro 3 lists IP65.
- Below-freezing use: the Apex 300 discharges down to -4°F.
FAQ
Which holds more, the BLUETTI Apex 300 or the EcoFlow DELTA Pro 3?
The EcoFlow DELTA Pro 3 holds 4,096 Wh and the BLUETTI Apex 300 holds 2,764.8 Wh. The DELTA Pro 3 expands to 12 kWh on one unit, and the Apex 300 takes up to 6 B300K, B300S, or B300 batteries.
Do both stations have 240V output?
Yes. The EcoFlow DELTA Pro 3 lists 120V and 240V output. The BLUETTI Apex 300 provides 120/240V through a NEMA 14-50R outlet at 50 A.
Which is lighter?
The BLUETTI Apex 300 weighs 83.78 lb and the EcoFlow DELTA Pro 3 weighs 113.54 lb, a 29.76 lb difference.
Does the BLUETTI Apex 300 need anything extra for USB ports?
Yes. BLUETTI says the Apex 300’s USB-C, USB-A, car, DC5521, and Anderson ports need the separate Hub D1, rated at 700 W.
