Where This Guide Comes From

Every figure in this article comes from one source video — Silver Cymbal’s head-to-head comparison of the EcoFlow Delta Pro 3 and the Anker Solix F3800 Plus. In it, he runs a 240V well pump on one unit and a 240V welder on the other, then walks through price, capacity, output, solar input, UPS speed, expansion, certification and standby loss, marking the advantage on each unit in turn. The table and the spec-by-spec notes below are transcribed straight from that video.

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Why These Two Power Stations

The EcoFlow Delta Pro 3 and the Anker Solix F3800 Plus are the two bestselling large power stations on the market today, and the comparison video picks them for one specific reason: both can output 120V and 240V internally. That 240V capability is what separates this class from ordinary portable generators — it lets a single unit run a well pump, a welder or a whole shop. The video demonstrates exactly that: the F3800 Plus powers an entire shop including a 240V well pump, while the Delta Pro 3 runs a 240V welder mid-project for hours without issue.

Neither unit is clearly better across the board, which is the honest takeaway of the video. The comparison below walks through each spec, marks the advantage where one unit leads, and ends with the only answer that matters — which one fits how you actually use it. If you are building a home backup around a specific inverter or battery bank, our energy storage lineup covers the fixed-installation side of the same question.

Price and Battery Capacity

Pricing is where the Delta Pro 3 opens with an advantage: $2,799 versus $2,999 for the Anker F3800 Plus, a $200 gap on the headline units. The Delta Pro 3 also carries the larger internal battery at 4,096 watt-hours, against 3,840 watt-hours for the Anker — roughly 256Wh more storage before any expansion packs are added. The video highlights both in green for the EcoFlow: cheaper per watt-hour and more capacity out of the box.

The Anker answers back on output. The F3800 Plus delivers 6,000 watts continuous from the single unit, while the Delta Pro 3 is rated 4,000 watts continuous with a 6,000-watt surge. For a shop running heavy simultaneous loads, that extra continuous headroom is a real feature; for most home backup scenarios, 4,000W covers the essentials comfortably.

Solar Input and Charging Options

On solar, the F3800 Plus takes the lead with 3,200 watts of solar input, versus 2,600 watts on the Delta Pro 3 (split between high and low interfaces). More solar input means faster recharging from panels and more flexibility with oversize arrays — for an off-grid-style setup that runs on solar most of the day, that is the number that matters.

The Delta Pro 3 counters on the generator side. It is the only unit of the two that directly connects its own generator, and it is a dual-fuel model: the generator charges the batteries with DC power instead of going through the AC chain, and it communicates with the power station, so the generator only turns on when the battery actually needs it. That is more efficient charging and quieter running than a generator bolted on the AC side, which is how the Anker has to work.

Parameter Comparison Table

Here are the headline specs from the video, side by side, so you can compare the two units at a glance. Anything one unit does clearly better is marked in its row; both units are expanded with matching battery packs and apps with no monthly fee.

SpecEcoFlow Delta Pro 3Anker Solix F3800 Plus
Price (single unit)$2,799 (advantage)$2,999
Internal battery4,096 Wh (advantage)3,840 Wh
Continuous output4,000 W (6,000 W surge)6,000 W (advantage)
Solar input2,600 W3,200 W (advantage)
UPS switching time10 ms (advantage)20 ms
Parallel units3 units / 12,000 W2 units / 12,000 W
Max expansion~37 kWh (advantage)~31 kWh
UL 9540 certifiedYes (advantage)No
Port coversHard physical doorsRubber covers
Standby loss per 24 h~23% (~942 Wh)~25% (~960 Wh) after firmware

UPS Switching Speed and Backup Reliability

Both units include a built-in uninterruptible power supply mode, but the switching speed is not the same. The Delta Pro 3 switches in 10 milliseconds — the fastest in its class, and fast enough for computers and network equipment, which tolerate only a few milliseconds of drop before rebooting. The F3800 Plus switches in 20 milliseconds, which is fine for appliances like refrigerators and TVs but too slow to keep a desktop PC or a server up through an outage.

For anyone running a home office, cameras or network gear, that 10ms number is the practical reason to lean EcoFlow. For an appliance-only backup, 20ms does not matter in daily use — the load never notices.

Expandability: More Units, More Battery Packs

Both stations expand, but the architectures differ. The Anker F3800 Plus can be paired with a second unit for 12,000 watts total, and up to eight extra batteries for about 31 kilowatt-hours of storage. The Delta Pro 3 allows three head units in parallel — also 12,000 watts total — and its larger native battery means a maxed-out system lands around 37 kilowatt-hours.

The video makes one honest point about expansion: past a certain point, bolting packs onto a portable station stops making sense and you should move up to a fixed system with more capacity natively. That is exactly where our wall-mounted and rack storage fits — 5 kWh and up, built for continuous duty rather than portability.

UL 9540 Certification and the Generator Question

The big certification news this year is the Delta Pro 3’s UL 9540 listing — the safety standard for whole-home energy storage systems — which, per the video, no other portable power station on the market has yet. That certification matters for three reasons: insurance may require it for a fixed installation, some utility rebate programs ask for it, and it is an independent third-party check of the battery system’s fire and electrical safety. The F3800 Plus has no UL certification at the time of the video, which is a meaningful gap for anyone installing a unit semi-permanently.

On generators, the Delta Pro 3 also wins on architecture: its own dual-fuel generator connects by DC, communicates with the station, and only starts when the batteries need it. The Anker accepts a generator too, but through the standard AC path — simpler, but less efficient and with no smart start.

Design, Ports and Standby Power Loss

Design is a personal call, and the video makes it honestly. The F3800 Plus is a vertical tower, which is desirable in an office or a closet — it tucks into a corner and stands next to a desk. The Delta Pro 3 keeps EcoFlow’s horizontal layout with plugs on the front, which the video prefers for portable use and RVs: a lower center of gravity and easier access to the outlets. Both units can also be laid flat, so orientation is a preference, not a hard limit.

Port covers are a quieter but real difference. EcoFlow uses hard physical doors over its ports, which stay tight for years; Anker uses rubber covers that flip around and occasionally tear off. And on standby loss — the power a station burns just sitting there — the firmware-updated F3800 Plus uses about 25% of its battery per 24 hours (roughly 960Wh), while the Delta Pro 3 loses about 23% (roughly 942Wh). The older F3800 firmware was far worse, and Anker’s update fixed it; the remaining difference is small but favors the EcoFlow.

Apps and Smart Control: Which One Should You Buy

Both units include an app at no cost and with no monthly fees. The video gives the edge to the EcoFlow app, which looks cleaner and offers more automation — rules, scheduling and power settings that matter on larger installations. EcoFlow was first to market with station software, and the Anker app will probably catch up.

So which one? The video’s conclusion is honest: it depends on your use case. Choose the EcoFlow Delta Pro 3 if you want the cheaper price, the larger 4,096Wh battery, 10ms UPS for computers, the only UL 9540 listing, direct generator support and the higher ~37kWh ceiling. Choose the Anker Solix F3800 Plus if 6,000W continuous output, 3,200W solar input, or the vertical tower footprint matter more to you. Either way, a 4,000Wh-class station is a serious piece of home equipment — and if you would rather compare chemistry and voltages than brands, our buying guides cover that ground too.

And if you are not hunting for a consumer brand but need the battery itself — a custom LiFePO4 pack at a specific voltage and capacity, an OEM or ODM project, or wholesale supply for your own power station line — that is what we do. Dajiu Energy is a Chinese manufacturer building LiFePO4 batteries for RVs, homes, golf carts and portable applications since 2017. Our product range covers LiFePO4 drop-in replacement batteries, EV and golf cart batteries, wall-mounted home storage, portable power stations, commercial energy storage and battery swap cabinets — explore the full lineup in our product center, or browse more buying guides. Tell us your voltage, capacity and size, and we’ll engineer the pack to hit it.

Reviewed by Dajiu Energy Engineering Team — a Chinese LiFePO4 battery manufacturer building LiFePO4 batteries for RVs, homes, golf carts and portable applications since 2017, serving OEM/ODM projects with CE, UN38.3, MSDS and ISO9001 certified builds.

What Viewers Are Asking (Top Comments on the Video)

These are the most useful of the video’s top comments, with our practical answers. The creator did not reply to these threads, so the answers are ours. Thanks-only comments were left out on purpose.

@painfulpillow · 24 likes
"Do these units allow 120v charging while outputting 240v? This was a flaw with previous units."
Our take: Yes on both units, with an important difference. The EcoFlow Delta Pro 3 allows 120V charging while outputting 240V — you can feed it from a regular wall outlet and still run 240V loads. The Anker F3800 Plus allows 240V charging while outputting 240V, which means it can take a full-power 240V charge in about 2 hours. If you already have a 240V dryer-style outlet, the Anker refills fastest; if you only have 120V, the EcoFlow still works while running 240V loads.
@eosjoe565 · 16 likes
"The EcoFlow allows 120V charging while outputting 240V but the Anker allows 240V charging while outputting 240V, which is much nicer. I can fully charge it in about 2 hours from a 240V outlet."
Our take: This is the practical charging detail most buyers miss: the EcoFlow charges on 120V while delivering 240V, and the Anker can take 240V in to charge in about two hours. For a home with an existing 240V outlet — dryer, range, or RV hookup — the Anker refills dramatically faster. For everyone else, the EcoFlow’s ability to keep producing 240V while sipping 120V from any wall socket is the safer default.
@dipitydoodaa2397 · 22 likes
"I looked at the Anker but decided to go with the EcoFlow Delta Pro 3. It's just a better unit all around. Especially where it matters. It's cheaper, more expandable and has more power."
Our take: A real owner choosing the Delta Pro 3 for exactly the reasons the video scores it — cheaper, more expandable and more power in the ways that mattered to them. That is the right way to read this comparison: the video flags different winners per spec, and an owner’s final pick should weigh which specs their actual loads hit. Both are excellent units; the gap is in the match to your use case.
@edwinward5670 · 13 likes
"This is a common misconception. Almost all households in the United States have 240 Volts. The US just does it as 'split phase', so there are 3 wires coming into the home."
Our take: This correction matters because it changes the practical picture: almost every US home already has 240V — it arrives as split-phase 120V/240V at the panel. What is rare is a portable 240V-capable device, which is exactly why these two units stand out. The video’s point stands — 240V output is a genuine feature here — but the context is: the infrastructure is already in most houses.
@unwin42 · 12 likes
"A big difference not mentioned is customer support. EcoFlow is all overseas and you're not talking to anyone. Expect emails once a day in the middle of the night."
Our take: Support quality is a fair tiebreaker that spec sheets never show. The pattern is real: EcoFlow’s support historically routes overseas with slow, once-a-day email replies, while Anker has invested in faster US-side support. For a $2,800+ purchase that you may expand into a home backup, the support channel deserves the same weight as the specs — check the current support reputation for your region before buying.
@c.y.997 · 11 likes
"Great video but this is the second video (#SolarLab) I have seen that is incorrect about the expansion of the F3800+. You can parallel 2 F3800+'s with the parallel kit."
Our take: A useful correction and the answer is yes: the F3800 Plus supports a parallel kit to run two units as one 12,000W system. The video’s point that expansion is capped at two head units is still accurate — that is the Anker’s ceiling — while the Delta Pro 3 reaches three units for the same 12,000W. If two F3800 Pluses are enough for your loads, the parallel kit is a legitimate path.
@Dextermorga · 10 likes
"It's almost comical - coming from the EU about 10 years ago, where 240V is standard. Here in the US, 240V is almost a unicorn (equipment). Meanwhile, in Europe it is the norm."
Our take: Context is everything here: 240V is standard in the EU and much of the world, and rare as a portable-output feature in the US — which is why these two units are newsworthy. For European buyers, the 240V capability is simply normal, and the decision shifts to capacity, solar input and price. For US buyers, 240V output is the feature that lets a portable station run a welder, a well pump or a shop.
@VOLTRONDEFENDER4440 · 8 likes
"Silver, there is one thing that the Delta Pro 3 has and that's an option to turn on 'GFCI/RCD' support! Which automatically safely bonds ground to neutral."
Our take: A genuinely useful detail that the video does not dwell on: the Delta Pro 3 has a software option to enable GFCI/RCD support, which automatically and safely bonds ground to neutral. That matters when you run the station as a temporary sub-panel or on a jobsite where a ground bond is required for GFCI-protected outlets to work correctly. It is a niche setting, but when you need it, it is the difference between tripping and running.
@markkempton4579 · 8 likes
"I've been back and forth between an EG4 wall-mount system and a pair of 3800s. I like the 'portability' of the 3800s in case a family member needs one."
Our take: This is the classic portable-versus-fixed debate, and both sides are right. A pair of F3800 Pluses gives you 12,000W and ~25kWh you can move to a family member’s house, a rental or a jobsite — that flexibility is the whole point of portable stations. An EG4-style wall-mount system gives you more kWh per dollar and no portability. Choose by your actual worst-case day: fixed loads at home, or moving power around.
@ambhatti1538 · 14 likes
"Exactly what I was looking for. Thanks for your usual attention to the important things! Keep up the excellent work and reviews!"
Our take: Appreciation for this kind of comparison is exactly why the video format works — a spec sheet can’t show 240V loads running, firmware fixes, or the feel of the ports. Keep this kind of side-by-side in mind when you buy: the winner depends on which rows of the table your loads actually touch. That is the same logic we apply when sizing a custom battery for a customer’s inverter.

Source video: Silver Cymbal — "Which 240V Power Station Is the Best? Ecoflow Delta Pro 3 or Anker Solix F3800 Plus" (youtube.com/watch?v=UvGZzlLEU90). Comment excerpts are quoted verbatim from the video’s top comments. Prices, capacities, ratings and certification claims are transcribed from the video’s own data.