EcoFlow DELTA 3 Max Plus review: The power station that finally feels effortless

People seem to like EcoFlow’s portable power stations, and I totally understand why. Its products are consistently praised for fast charging, reliable output and solid build quality. Both my colleagues and I – a.k.a. T3’s expert team – rate the brand’s units highly for the same reasons.

The company reached out in October 2025, asking if I was up to reviewing the upcoming DELTA 3 Max Plus, the larger sibling of the DELTA 3 Plus, which I reviewed about a year ago. That station still powers my home office setup, thanks to its compact form factor and fast UPS switch-over time.

Now that I’ve been using the DELTA 3 Max Plus, it might be time to upgrade my setup. The new unit has a few tricks up its sleeves, including Smart Output Priority and a whopping 6,000 W surge capacity, making it even better suited for general indoor use (as opposed to, let’s say, camping or emergency situations).

Even after two months of testing, I can’t say I’ve ever pushed the DELTA 3 Max Plus out of its comfort zone, which says a lot. It’s a brilliant station, especially if you buy it at a discounted price; thankfully, EcoFlow is already selling it for less than RRP/MSRP via its web store.

EcoFlow DELTA 3 Max Plus review

Price and availability

The EcoFlow Delta 3 Max Plus is available now as part of the brand’s Max series, positioning it above the smaller DELTA 3 Plus thanks to its much larger battery and higher power output.

In the UK, it retails for £1,748, but you can grab it now for £1,399, a £350 saving over RRP. In the US, EcoFlow sells the unit for $1,899, but there is a discount now that knocks $850 off the price. In Germany, you can get the station for €1,499.

Design and build quality

The EcoFlow DELTA 3 Max Plus is bigger than the DELTA 3 Plus, but the proportions are still the same, almost a carbon copy. The handles, fans, displays and ports are laid out almost exactly the same as on the smaller sibling.

Despite its doubled capacity (to 2kWh), the Max Plus doesn’t feel excessively bulky. At just over 20kg, it’s less than twice the weight of the DELTA 3 Plus and can be hauled around a lot easier than the Dabbsson power station I keep in the garage to charge my electric bikes.

The casing feels (admittedly) plasticy but solid, and everything from the port layout to the buttons and display gives off a reassuringly premium impression. Ports are clearly labelled and logically arranged, with the majority of the output ports positioned below the small LED screen on the front of the unit.

The screen is bright, easy to read, and provides all the essential information without feeling cluttered. The three buttons above the display turn the station aon nd switch the AC ports on and off. Unlike the DELTA 3 Plus, there is no button to activate the USB ports – they seem to turn on as soon as the power station comes to life.

Speaking of USBs, the DELTA 3 Max Plus has three USB-C ports and one USB-A. One of the USB-Cs is rated to 140W, while the other tops out at 45W. The USB-A port can handle up to 18W. The rear of the unit houses the input ports and a switch that toggles the AC charging speed. The DC outputs can also be found here.

The DELTA 3 Max Plus uses LFP batteries, which are lithium units designed for safety, longevity and stability. These cells are rated to last around 4,000 full charge/discharge cycles before the battery’s capacity drops to about 80 % of its original level.

This means you can charge the DELTA 3 Max Plus more than once a day for 10 years, and it should still retain at least 80% of its original capacity. I’m 11 years and 11 months away from confirming this.

The station has no built-in lights, which, to me, indicates it’s designed for indoor use. This is further reinforced by the fact that the DELTA 3 Max Plus can be used as a backup for sensitive gadgets such as laptops, thanks to its 10 ms switch-over time, an industry-leading figure for a 2kWh unit.

Power output and related features

On paper, EcoFlow rates the unit for up to 3,000 W of continuous AC output, with a huge 6,000 W surge capacity, and in real-world use, it delivers on that claim. I managed to push it briefly past 3,000 W with a hair dryer and a kettle running simultaneously, and the unit looked absolutely unbothered.

That high output is made possible by EcoFlow’s X-Boost 3.0 technology, which allows the station to handle loads that would otherwise exceed its continuous rating for short periods. The company quotes support for devices up to around 3,900 W with X-Boost.

Another unique feature of the DELTA 3 Max Plus is Smart Output Priority, which turns the power station into something closer to a managed energy system than a simple battery. Instead of treating every outlet the same, the Max Plus lets you control different circuits independently.

Two AC outputs and one DC group can be managed separately through the EcoFlow app or directly on the unit, allowing you to prioritise devices while temporarily disabling less important ones. This means you can keep something like a fridge or Wi-Fi router running while cutting power to unnecessary accessories.

You can also define your own discharge strategy by setting a battery threshold, after which the DELTA 3 Max Plus automatically shuts down non-essential circuits once the battery drops below that level.

Better still, if total demand exceeds the Max Plus’s 3,000-watt output limit, the system disconnects lower-priority circuits first, keeping essential loads powered and preventing abrupt interruptions.

Performance

In day-to-day use, the EcoFlow DELTA 3 Max Plus performs exactly the way its specifications suggest. I ran my workstation setup, including a MacBook Air M1, my wife’s laptop, multiple smartphones and an array of wearables, and not once did the Max Plus struggle.

Where many smaller power stations, such as the lovely DJI Power 500, struggle to keep up once you start stacking laptops and accessories, the Max Plus’s 3,000 W continuous output and surge headroom meant I found it hard to push the station to its limits during testing.

I deliberately threw high-draw appliances at it, and the unit behaved almost like a mains feed. The Max Plus stays genuinely quiet under typical loads, only spinning up its cooling fans briefly (and unobtrusively, I must add) during the station's shutdown.

I tested the unit in the middle of winter with not a lot of heating on, which probably helped keep its operating temperature low, but still, the fans almost never came on when powering my home office setup. Even when the output spiked to over 3kWh for a couple of minutes, the fans remained silent. Impressive.

Charging

Charging speed is another area where the unit delivers on its promises. I confirmed first-hand that it reaches around 80% state of charge in roughly 47 minutes when plugged into AC power. The DELTA 3 Max Plus charges from 0 to 100% in 68 minutes and has a maximum AC input of 2,300W.

I only tried AC charging – I wasn’t sent solar panels with the DELTA 3 Max Plus – but that works like a charm. The fans came on now and again to keep the batteries from overheating, but overall, the station stayed near-silent during charging and certainly immediately afterwards.

Verdict

The EcoFlow DELTA 3 Max Plus feels less like a portable power station and more like a compact, intelligent home power hub. It combines genuinely fast charging, serious output, whisper-quiet operation and long-life LFP batteries into a package that’s easy to live with day to day. Features like Smart Output Priority and the ultra-fast UPS switch-over give it a level of refinement that few rivals in this class can match.

It isn’t cheap, but at discounted prices it becomes a compelling upgrade over the DELTA 3 Plus, especially for desk-side, home-office and backup use. After two months of testing, I can confidently say it’s one of the most polished, reliable and practical power stations EcoFlow has produced, and it may well become my new permanent office companion.

Should you buy it?

If you want a high-capacity power station for indoor use, home backup or desk-side power that doesn’t sound like a generator, doesn’t take hours to recharge and doesn’t feel fragile or complicated, the DELTA 3 Max Plus is an easy recommendation. It’s powerful enough to replace mains power in short bursts, smart enough to manage loads properly, and quiet enough to forget it’s even there.