EcoFlow DELTA Pro 3 vs Anker SOLIX F3800

The verdict: buy the EcoFlow DELTA Pro 3 unless you have a load above 4,000W. It holds 4,096Wh against 3,840Wh, it recharges to 80% in 50 minutes, and it is rated to 80% capacity after 4,000 cycles. The Anker SOLIX F3800 wins on one axis, and it is a decisive one: 6,000W continuous with a 9,000W surge, delivered through true 240V receptacles. If your plan includes a well pump, an electric range element or a central air handler, that is the unit and this comparison is already over.

Everything else here is a trade between stored energy and instantaneous output, and most households hit their capacity ceiling long before their output ceiling. What size power station for a power outage runs that arithmetic with real appliance figures.

If you have already settled on the EcoFlow and want the detail rather than the contest, the EcoFlow DELTA Pro 3 review goes through its cycle rating, its charging methods and the two specifications EcoFlow leaves off its page. The Anker SOLIX F3800 review does the same on the other side.

The decision table

Where the DELTA Pro 3 wins

Stored energy, and the cycle rating that protects it. 4,096Wh against 3,840Wh is a 6.7% edge, which on its own is marginal. The cycle rating is not marginal: EcoFlow publishes 80% capacity after 4,000 cycles, while Anker publishes 3,000+ cycles for the F3800 without naming a retention threshold. A third more rated cycles on a battery this size is years of difference if the unit cycles daily rather than four times a winter. How long portable power stations last explains what those two numbers actually promise.

Recharge speed on the clock that matters. 80% in 50 minutes is the figure to care about in a storm, because the window you get is usually the hour the grid comes back before it drops again. Anker publishes an input rating for the F3800 — 1,800W — but no recharge time, and we are not going to calculate one and present it as theirs.

Seven charging methods. EcoFlow publishes AC, solar, car, generator, EV charger, smart-home panel and dual-input combinations for this model. That breadth matters on a unit you expect to refill during an outage rather than before one.

Where the F3800 wins

6,000W continuous, 9,000W surge, and two 240V receptacles to deliver it. That is a 50% output advantage, and it is the only line in the table that can make a purchase impossible rather than merely awkward. A 240V well pump with a hard start, a five-ton air handler or a range element will refuse to start on 4,000W and start fine on 6,000W. Surge is the spec that fails silently until the moment it doesn't — the same trap described in what size power station do I need.

2,400W of published solar input. EcoFlow does not publish a maximum solar figure for the DELTA Pro 3 in its overview, so we cannot compare the two honestly — but 2,400W is a large, concrete number, and on a unit meant to ride out a multi-day outage, refilling from the roof rather than a dead grid is the whole point. How much solar input do you need explains why this one spec governs the others.

A published weight, which sounds like faint praise and is not. 132.3 lb including wheels is a number you can plan around: which door it comes through, whether two people are needed, whether it lives in the garage or the basement. EcoFlow publishes no weight for the DELTA Pro 3 on its product page. For a unit in this class that is a real information gap, and we score it against them.

A marginally higher expansion ceiling — 53.8kWh across six packs against 48kWh. Both numbers are far past anything a household in this comparison will build, so treat it as a tiebreaker and nothing more.

Pick the DELTA Pro 3 if

• Your loads are 120V and the biggest is under 4,000W — fridge, freezer, furnace blower, lights, electronics, a soft-start pump.
• The unit will cycle often rather than sit on standby, so the 4,000-cycle rating earns its keep.
• You want the fastest refill in the hour the grid comes back.
• You expect to grow the system and want one modular stack rather than two.

Pick the F3800 if

• Anything on your list needs more than 4,000W, or a true 240V receptacle rather than a split-phase workaround.
• You are recharging from solar during the outage, not from the grid afterwards.
• You need to know the weight before you buy, because of stairs, a doorway or a shelf.
• Your plan is a transfer switch rather than a handful of extension cords.

What neither of them is

Neither of these is portable in any sense that matters to this site's usual reader. The F3800's 132.3 lb is published with the wheels attached, which tells you how it is meant to move: across a flat garage floor, not into a campsite. If you arrived here from the camping or van side, the honest recommendation is to stop reading and look at the 1kWh class, where the whole argument is about pounds rather than kilowatt-hours.

If the gap between those two worlds is where you actually sit — more than a weekend battery, less than a house — the EcoFlow DELTA 2 Max at 2,048Wh and 50.7 lb is the unit that lives there, and it is the third pick below for exactly that reason. Best power stations for home backup places all three against each other, and best power station for hurricane season applies the same three to a multi-day storm.