EcoFlow Delta Pro Review: Worth The Price Tag?

Released in 2021, the EcoFlow Delta Pro offers to be an emergency power solution that can power an entire home. 

EcoFlow has only been around since 2017 but yet managed to establish itself as a premium portable power station brand. 

Responding to increasing energy uncertainty as well as the increasing demand for batteries that could run a home during blackouts, EcoFlow has issued their latest powerhouse in the heavyweight category — the Delta Pro. 

With several outlets and charging ports, this power station is capable of powering a small cabin, an RV, a boat, and probably your entire camping trip. 

Apart from record-breaking AC charging speed, the EcoFlow Delta Pro was designed to make use of existing green energy infrastructure and technology — EV charging stations as well as a range of solar panels. 

But as they say, with great power comes great weight. And a not so great price. 

This portable power station excels in situations when you need all the power you can bring along.

However, your average bushwacker will probably look for a more affordable and portable station with basic functionalities.  

Key Features

At the beginning of last year, two things happened to me. I changed my job and I sold my apartment for some future budgeting. Long story short, I moved to a house where my grandparents used to live. 

Now the place in question is at the end of a power circuit, and wherever there’s a problem upstream, my side of the street is left in the dark. 

I can’t tell you enough how frustrating this can be. I work from home and need technology and connectivity to put food on my table. 

This is when I started looking for a more capable portable solar power station that can keep my home office and essential home appliances powered. 

The EcoFlow Delta Pro has drawn my attention with:

I also thought to myself — “This can also be a great solar generator for my RV.”

Definitely far more eco-friendly than fuel-powered generators.  

Having already used the EcoFlow Delta series, I decided to try the Pro this spring. 

This one's a keeper for me, but is it going to meet your expectations?

I’m going to try to remain as unbiased as possible. Here’s my EcoFlow Delta Pro review. 

EcoFlow Delta Pro Review: Dissecting the Key Features

Sleek Design at Work 

In the best EcoFlow tradition, the Delta Pro comes in anthracite and metallic gray color scheme. Although packed with features, at first glance, the Delta Pro looks elegant and streamlined. 

Batman would probably use this one to power his Batcave during power outages in Gotham. 

The size of a small suitcase, and weighing 99 lbs, even Schwarzenegger in his prime would think twice before taking this one backpacking. 

I work out twice a week and even I struggle carrying it short distances. I guess that’s the reason they built it with two handles on opposite sides of it. So two people can carry it and if needed, lift it in the trunk of a car. 

Thankfully, this massive power station comes with a pair of sturdy wheels on the back and an extendable handle on the other side. 

This way I can easily schlepp it around. However, going up and down the stairs is still a struggle, as the wheels are kind of set in halfway into the case. 

I hope engineers at EcoFlow are going to read this at one point. 

Seriously, guys, check out the wheels in the Goal Zero Yeti series. That trolley is still a king of mobility in the high-power range.

On the front side, you have:

• 5 AC outlets, 
• 6 USB ports
• Big screen — I’ll get back to it soon. 

Under the upper side cover, you’ll find:

• 1 Anderson port
• 12V car outlet 
• 2 DC5521 output ports, 
• Buttons and switches for IoT, pairing, and standby mode

Under the lower side cover, there’s an 

• Infinity port that allows me to charge the battery on public EV chargers.  

On the opposite side, there's an 

• AC charging port 
• Solar/car charging port
• 2 extra battery ports
• Switch for Fast/Slow charging mode
• Reset button  

Huge Capacity Battery… That Can Be Tripled!

It seems that regular Lithium-ion and Lithium-polymer batteries are taking the back seat these days, as more and more power station brands are adopting the incredible Lithium Iron Phosphate (LiFePo4) batteries for their flagship models. 

The EcoFlow battery provides 3,500 charge cycles before its capacity drops to 80% of the original rating of 3,600 watt-hours. Even then, it’s more than most of its competitors have out of the box.

For comparison, the excellent Bluetti AC200P and Point Zero Energy Titan that I previously reviewed come with 2,000Wh batteries. 

If the Delta Pro battery isn’t enough for you, you can get expansion batteries. You can connect up to two of those, which means you get triple the capacity. And if you get the Double Voltage hub, you can pair their output to a whopping 7,200W of power.

That’s more than standard 5kW home solar systems.

Just keep in mind though that one EcoFlow Delta Pro extra battery costs $2,499. Ouch.

Multiple Charging Speeds

But such a big battery must take days to charge, right?

Wrong. 

You can charge this power station faster than most of its competition in a similar power range.

When charging from the AC wall socket, you have two modes (Fast or Slow) which you can select using a small toggle switch.

If you’re using the 120V US version, you can fully charge the EcoFlow Delta Pro 3,600W solar generator in a little less than 2 hours, at the rate of 1,800W. 

On the other hand, the 240V EU version has a charging power of 2,900W, so you get from 0-100% in an hour and a half. 

EcoFlow claims that its fast charging technology uses a battery management system (BMS) that keeps the battery healthy for a long time.

I can’t attest to that, as I’ve only had the Delta Pro for about six months. 

What I know as an engineer is that the slower the charging speed, the longer your battery lasts. 

This is why I only use fast charging in a pinch — for example when I know that a storm is coming and on days when power outages are frequent and unpredictable. 

As slow charging is concerned, this is where things get sweet. Using the app, I can configure the AC charging power from 200-1,800W. 

But why would anyone want a weaker charging power anyway?

For example, if you’re staying somewhere with limited infrastructure and don’t want to overload the circuit board. Or if you're using an extension cable to your caravan that can only take 1kW. 

In those cases, it’s much safer to limit the charging power to 400 or 600W.

This is an important thing to remember, but sadly not many EcoFlow Delta Pro power station reviews mention it.

Super Fast Solar Charging

The spec sheet says you can charge the Delta Pro with solar panels up to a maximum of 1,600W. 

So if you’re using such a solar array, you could charge your EcoFlow in less than 2.5 hours. 

What I used were two 455W LG solar panels.  

In series wiring, it managed to keep the current at 10A while the combined voltage was not higher than 82V. 

All in all, I managed to get a 770W of solar charge for the better part of the day and fully charge the unit in a little more than 4.6 hours.

Still impressive. 

The MC4 to XT60 cable comes in the box, so you can plug your standard roof panels directly into the Delta Pro. If you have portable panels, you’ll have to buy a separate adaptor. 

Car and EV Charging on the Road

I want to be able to charge my power station through the car outlet on the go. The EcoFlow Delta Pro supports 12V/24V car chargers and 8A current input. The charging cable is included in the package. 

Interestingly, this power station also has an Infinity port, so you can use electric vehicle charging stations and 3,400W input to charge it in less than 2 hours.

Display Done Right

The display is one of the best ones I’ve seen so far. There are power stations that have regular digital LCD displays with a backlight which are difficult to read until you get really close. 

This is not the case with the EcoFlow Delta Pro. The display is big and easily visible in the sunshine. There’s no backlight that turns on and off. Big bright digits are easy to see in the dark — when you probably need it the most. 

On the right, the display shows the current power in and out with four digits. There are also other symbols that show that the fans are running and the AC power frequency. In the center, there’s a large circle that shows the percentage of the battery remaining. 

On the left, you can see how much time you have with the current discharge rate. 

I find this info super useful when I have to decide what to plug in, as it helps me sort my priorities. 

This unit doesn't have a touch-screen display though, like the Bluetti AC200P. Instead, you access it through a mobile app. 

Great Mobile App But Lacks Automation

This EcoFlow power station has Wi-Fi and Bluetooth connectivity so you can remotely turn the AC and DC output on and off in front of the sleeping mode and also track the usage. 

The mobile app has brutal animations, is very user-friendly, and is packed with features. You can use it to configure the slow charge rate and also enable the XBoost output mode in which you get 4,500W of total power. 

Still, I’d like to see some automation options. For example, the AC and DC outputs are strictly manual. You can’t schedule them to a web automation service like IFTTT. 

There also isn’t a way to schedule or automatically adjust the input charge rate.

This would come useful for areas where you have an overnight cheap tariff, especially if you have connected several units into a home system. 

The variable charge rate automation would also be nice on such an advanced power station. For example, if my panels are generating excess solar energy that I’m not using, the unit could detect that and use that energy to charge the battery. 

This feature comes built-in with the Tesla Powerwall. 

Since the EcoFlow Delta Pro portable power station comes with Wi-Fi and upgradable firmware, maybe we can hope for more automation in the future. 

Safety & Security

The EcoFlow Delta Pro comes with protection against all kinds of overloads, including current and voltage, temperature extremes, and short circuits. 

The battery management system monitors charge round the clock, to provide real-time regulation of voltage, current, and temperature. As a result, the battery is much safer and more effective than standard Lithium-ion batteries. 

I already told you about the AC charge speed regulation. That’s another safety feature that allows you to avoid overloading the charging infrastructure, circuit breakers tripping, etc. 

The unit comes with four large fans that provide the needed airflow. The fans are much noisier than what I’m used to with portable power stations, but having in mind the sheer power, I can write that off.  

What Can the EcoFlow Delta Pro Power?

Over the past five months, the EcoFlow Delta Pro has been my go-to power station and I tried my best to push it to the limits. 

The result: There wasn’t an appliance in my home that it couldn't power. If it came with a three-phase outlet, it could probably power the central heating furnace in my basement as well. The 3,600 watts of sustained power with a 7,200W peak is far more than an average user needs. 

The first appliance I tested was my Xiaomi Mi 4 Pro Air Purifier. It turned out to draw just 50W of power which was nothing. 

Then I decided to cook some cordon bleu and country wedges for dinner. The Xiaomi Smart Air-Fryer drew an additional 1,500W. 

I saw that there was still plenty of power left so I plugged in my: 

• Fridge (100W)
• Microwave (90-800W)
• Dishwasher (1,300W)

There were no more AC ports available and the total load was 3,750W. It’s 150W above the stated capacity, but the station had no problem running for over 15 minutes. The time remaining was displayed as 40 minutes. 

I don’t even want to mention what you can charge at the same time using the USB ports, because gadgets like phones and tablets draw very little power when compared to appliances with motors and heating elements.

The conclusion is that if you pay attention to what you plug in, you can run the essential appliances in your home. However, given the average daily usage of a family home of 30kW in the US, this would be more realistic in a small cabin or RV. 

Plug All the Gadgets You Have

With all the sockets and ports onboard, with the EcoFlow Delta Pro I never had to use a power strip. 

So what exactly are we talking about?

• Four AC ports rated at 20A and one rated at 30A
• Two USB-A 2.4 amp 12W ports
• Two USB-A 18W Fast Charge ports
• Two 100W USB-C Power delivery ports
• 12V 10A DC carport
• Two standard DC5521 38W ports
• Anderson 12V 30A port

The last three options are hidden under the side panel, while the USB and AC sockets are exposed on the front of the unit, along with the display. 

Who is the EcoFlow Delta Pro For?

Due to its size, weight, and power options it provides, the EcoFlow Delta Pro power station will probably be an overkill for most people. This is perfectly okay. Sometimes you just need a portable power station like the Jackery 1000 to take on a beach or a day of road tripping. 

However, there are situations where I’d be pressed hard to find a better device than this. 

I’m talking here about solving problems that many people have with power outages caused by extreme weather or unreliable supply of power. 

We can be safe for now, but let me tell you, if I had to flee, I’d like to have one of these in the back of my RV.  

On the bright side, I hope that most people would buy the Delta Pro for fleeing on the vacation.

This is a fantastic power unit for multi-day camping trips. It offers a complete solution for RV road trips and outdoor adventures, especially if you pair it with efficient flexible solar panels.

If you live in areas with unstable electricity supply, one or even two Delta Pro units would reduce your dependence on the grid. 

In my case, this power box allowed me to set up an off-grid office in my RV. This way I can keep working even if I decide to replace my suburban landscape with something more thrilling and breathtaking. 

On the other hand, the EcoFlow Delta Pro solar generator is not for everyone. The eye-watering EcoFlow Delta Pro price of $3,699 and just as pricey accessories mean this is not something you’d order from Amazon at 4 AM after a night on the town.

This unit is an investment, and if you have problems that this power station can solve, it will be worth your while. 

The Competition

There are many portable power stations on the market, but when you’re looking for a solar generator that can power pretty much everything you own, the competition becomes tough. 

EcoFlow has several power stations in its lineup, so a number of users may opt for a more portable model like the EcoFlow Delta 1800W or one from the River series. 

1. Bluetti EP500

2. Jackery Explorer 2000 Pro

Comparing the EcoFlow Delta Pro With Other Popular Solar Generators

EcoFlow Delta Pro Benefits

Powerful Battery on Wheels

Just by checking out the specs, the huge battery capacity of 3,600Wh is enough to catch your eye. Even more, if you know that this juggernaut is portable. 

In my article on building a DIY solar generator, I explained that you can add wheels or a trolley to the case and make it somewhat mobile, but then you need to do all the wiring and calculations yourself. 

With the EcoFlow Delta Pro, you get a 100% safe mobile power box that can keep your home online in a pinch — and you can roll it out for a camping trip or a weekend in a country home.

All the Ports You Can Use

Of what use is a huge battery if you have no ways to use it? This must have crossed someone’s mind at EcoFlow R&D when they decided to add a total of 15 outlets. It might look like overkill, but let me tell you when this baby is fully charged I want the option to recharge ALL of my gadgets.  

If you’ve experienced several days of outages, you know what I’m talking about. When the power is on and you can charge your battery, you want to top off all your devices. 

I especially came to appreciate the Fast Charge and Power Delivery USB-C ports. Whether I charge my laptop, phone, or drone, the PD port automatically detects the right amount of power to charge the gadget as quickly as possible. 

This allows me to use the remaining AC ports for more powerful devices such as the fridge, washing machine, and cooker. 

I’m frankly surprised that they included a 30-amp plug. I have a camper that uses a 30-amp plug for power. This allows me to use the trailer’s own wiring instead of navigating a mess of cords all over the place. 

High-Speed Recharge    

Here’s the deal. I come home and see that my Delta Pro has zero battery life. I plug it into a regular AC outlet and it’s fully recharged in just 2 hours. 

Until a few years ago I thought such a charging speed would be impossible without a special hi-power charger. However, the lithium iron phosphate battery and advanced battery monitoring system are game changers. 

I can even charge from a fast-charging station for electric vehicles. This greatly improves my autonomy when I’m on the road.  If the weather is not ideal for solar panels, the only thing I need is to locate the nearest EV charger and I’m all set. 

EcoFlow Delta Pro Shortfalls

What’s That Noise?

The biggest issue I had with the EcoFlow Delta Pro is the sound that the cooling fans make. I’ve used many high-powered solar generators, including one of the best all-rounders, the Bluetti AC200P, and they were all quiet during the operation. 

I understand that with a higher power rating comes louder noise because more action is needed to cool the system, but the noise this one makes!

The fans are running constantly while the unit is charging, and intermittently when powering a load. However, I noticed that when the load is high they keep hoovering non-stop. 

Fan noise or not, if you need a 3,600-watt charger you’ll find a way to cope, but I wish they find a way to reduce this noise in future models. 

Too Heavy to Lift

There’s no going around it — the Delta Pro is a heavy unit. You won’t find any online EcoFlow Delta Pro reviews that don’t complain about the weight. There is a retractable handle and rubberized wheels to roll around, but that’s mostly it. You can move it easily between rooms, but if you need to lift it into your car, or drag it onto the second floor of your home, get ready for some powerlifting, pardon the pun. Watch out for that lumbar spine!

Pros and Cons Summary of the EcoFlow Delta Pro

FAQ

The EcoFlow Delta Pro: Should You Buy It?