comparison-guideOct 9, 20267 min read

OUKITEL BP5000 Pro Max vs EcoFlow DELTA Pro 3 vs Anker SOLIX F3800

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Picking between the OUKITEL BP5000 Pro Max vs EcoFlow DELTA Pro 3 vs Anker SOLIX F3800 comes down to one priority. Stored energy, solar recovery, or raw output. The OUKITEL BP5000 Pro Max carries the largest base battery at 5,120Wh.

EcoFlow takes the most solar. Anker pushes the most continuous power, 6,000W.

All three weigh over 110 pounds, run on LiFePO4 cells and put out 120V/240V split phase power from one unit. These are home backup systems on wheels. Camping is an afterthought.

We checked every spec below against the manufacturer pages in September 2026.

Quick verdict

Most energy with no add on battery: BP5000 Pro Max, 5,120Wh

Refills fastest from panels: DELTA Pro 3, 2,600W solar

The SOLIX F3800 leads on continuous output at 6,000W

Longest rated battery life: BP5000 Pro Max, 5,000+ cycles to 80%

BP5000 Pro Max vs EcoFlow DELTA Pro 3 vs Anker SOLIX F3800: Specs Side by Side

U.S. versions, manufacturer ratings. Bold marks the leader in each row.

Spec	OUKITEL BP5000 Pro Max	EcoFlow DELTA Pro 3	Anker SOLIX F3800
Base capacity	5,120Wh	4,096Wh	3,840Wh
Continuous AC output	5,000W	4,000W (6,000W X-Boost)	6,000W
Surge	10,000W	8,000W	9,000W
Max expansion, one unit	19,456Wh	12kWh	26,880Wh
Max solar input	1,000W	2,600W	2,400W
UPS switchover	<10 ms	10 ms	<20 ms
Rated cycles to 80%	5,000+	4,000	3,000
240V outlets	L14-30	NEMA 6-20R, L14-30R	NEMA 14-50, L14-30
Weight	121.25 lb	About 113.5 lb	132.3 lb
Warranty	1 year + 2 with subscription	5 years	5 years

Which Has the Most Battery Capacity and Expansion Room?

Base capacity is what you get on day one. Expansion is how far you can grow later.

OUKITEL starts at 5,120Wh and adds up to seven B2000 expansion batteries at 2,048Wh each, 19,456Wh in total. Small modules mean small steps, so storage can grow 2kWh at a time.

EcoFlow grows in 4,096Wh blocks: up to 12kWh on one DELTA Pro 3 and 36kWh across three units. Anker takes six 3,840Wh packs for 26,880Wh on a single F3800.

How much do you actually need? A fridge, freezer, router, lights and a few outlets use roughly 5 to 10kWh a day. A whole house is another story. The EIA puts the average U.S. home at about 10,500kWh a year, close to 29kWh a day. In our experience, people planning for a two day essentials outage usually end up between 10kWh and 15kWh, and the BP5000 Pro Max gets there with the fewest extra batteries.

Which One Runs 240V Appliances Best?

Every unit here runs 240V from a single chassis. What separates them is inverter headroom.

Anker F3800: 6,000W continuous, 9,000W surge.
The OUKITEL BP5000 Pro Max has 5,000W continuous and the highest surge of the three, 10,000W.
EcoFlow DELTA Pro 3: 4,000W continuous, up to 6,000W with X-Boost on resistive loads, 8,000W surge.

Surge is the number to watch for motors. A well pump can briefly pull several times its running watts when it starts. OUKITEL leaves the most room there.

Check backup mode limits

In backup (UPS) mode, OUKITEL rates the pass through path at 1,800W at 120V and 3,600W at 240V. That is lower than the 5,000W inverter figure, so size the loads you want protected during a switchover to the backup number.

How Long Will Each One Run a Fridge, AC, or Home Office?

Usable energy divided by average load gives you hours. We plan with 85% of rated capacity to cover inverter and standby losses.

Load (average draw)	BP5000 Pro Max	DELTA Pro 3	F3800
Chest freezer (60W)	About 72 h	About 58 h	About 54 h
Refrigerator (150W)	About 29 h	About 23 h	About 22 h
Fridge, router, lights, laptop (300W)	About 14.5 h	About 11.6 h	About 10.9 h
Window AC (1,000W)	About 4.4 h	About 3.5 h	About 3.3 h

Treat these as planning numbers. Fridges cycle, so a 700W label says little about real use. OUKITEL's own test fridge ran 14.9 hours on the BP5000 Pro Max, which shows how much an older unit can draw. A plug in energy meter left on for 24 hours gives the real figure, and our guide on what size solar generator runs a refrigerator and freezer walks through the math.

For context, FoodSafety.gov says a closed refrigerator keeps food safe for up to 4 hours without power. All three clear that easily.

How Fast Does Each One Recharge?

Wall charging is a tie. Each unit pulls 1,800W from a standard 120V outlet. OUKITEL reaches 80% in about 2.5 hours, or 1 hour 25 minutes when AC and solar run together at 2,800W.

Solar is where the gap opens.

EcoFlow: 2,600W across two inputs (1,600W high voltage, 1,000W low voltage).
About 1.5 hours to 80% on the Anker, from 2,400W of panels in good sun.
OUKITEL tops out at 1,000W, a full charge in roughly 4.5 hours.

That 1,000W ceiling is the BP5000 Pro Max's weakest spec. A full array brings back 4 to 5kWh on a clear day, fine for essentials but short for heavy daily loads. If you plan to live off panels, size the array first with the DOE guide to planning a home solar electric system.

How Do You Connect Each One to Your Home Safely?

Extension cords work for a handful of appliances. A well pump or furnace is different. Those need a transfer switch or a manufacturer panel, installed by a licensed electrician.

EcoFlow supports an inlet box, a manual transfer switch or Smart Home Panel 2.
Anker: Home Power Panel for circuit level backup.
OUKITEL's L14-30 output feeds a compatible transfer switch or power inlet box.

Switchover speed matters too. OUKITEL and EcoFlow switch in 10 ms or less. Anker is rated under 20 ms, which most home electronics ride through. For ready made kits, see OUKITEL home battery backup systems.

Editorial note: why battery backup works indoors

The CPSC warns that one portable generator can put out as much carbon monoxide as hundreds of cars (Carbon Monoxide Information Center). FEMA says to run generators outdoors, at least 20 feet from doors and windows (power outage info sheet). Battery power stations produce no exhaust, so all three are generally considered suitable for indoor use with clear airflow around the vents.

Warranty, Cycle Life and Long Term Value

Here the two specs point in opposite directions. EcoFlow and Anker give you 5 years of warranty with lower cycle ratings, 4,000 and 3,000 cycles to 80%. OUKITEL covers 1 year, plus 2 more with a subscription, and rates its cells for 5,000+ cycles.

5,000 cycles is over 13 years at one full cycle a day. Backup owners rarely cycle that often. We've found that storage habits wear a battery faster than use does; our piece on how long portable power stations last covers the care routine.

On price, divide the current price by base watt hours, then add every battery, panel and transfer part on your list. A cheap base unit can turn into the expensive system. All three brands run frequent sales, so check the product pages the week you buy.

Which Power Station Should You Buy?

Your priority	Best fit	Why
Most stored energy per unit	OUKITEL BP5000 Pro Max	5,120Wh base, 5,000W output
Hard starting 240V motors	BP5000 Pro Max or F3800	10,000W and 9,000W surge
Heavy simultaneous loads	Anker SOLIX F3800	6,000W continuous
Solar powered, long outages	EcoFlow DELTA Pro 3	2,600W solar input
Longest warranty	DELTA Pro 3 or F3800	5 years
RV with 48V or 30A needs	OUKITEL BP5000 Pro Max	48V aviation port, L14-30

Smaller loads? The full range of OUKITEL portable power stations includes 1kWh to 3kWh models.

Conclusion

Go with the OUKITEL BP5000 Pro Max if you want the most energy and surge from one unit and mostly recharge from the grid. Its weak spots are 1,000W solar input and a shorter base warranty.

The EcoFlow DELTA Pro 3 suits solar heavy homes that want a mature home panel setup. The Anker SOLIX F3800 fits 240V loads that need 6,000W continuous, as long as 132 pounds is not a problem.

No single winner. Your loads decide.

How to Choose in 3 Steps

List your loads. Every appliance you need in an outage, its running watts, and which ones run together.
Size the battery. Multiply average watts by hours needed, then divide by 0.85.
Match the unit. If you land near 5kWh with 240V needs, compare the OUKITEL BP5000 Pro Max specs and current price.