Portable power generators have been gaining popularity lately and if you are in the field, you will have heard of Ecoflow products. Ecoflow has been manufacturing some of the most aesthetic, smart and high-quality power stations. Till now, I have tested more than 5 power stations and own 4 different units myself. I love tweaking them and putting them to extremes to see how they perform.

Ecoflow Delta Pro, their new model has garnered so much attention for its huge capacity and smart features. In this article, we will see if Delta Pro lives up to its hype. We will also dive deeper into its features, performance and my personal experience after using it for a month now.

Ecoflow Delta Pro Buy Here

I received Delta Pro from Wellbots. They offer this product at the cheapest price on the market. The whole experience including the delivery was great.

Use coupon code KD29PGGF to get an additional $200 off on Ecoflow DELTA Pro here. This is probably Ecoflow Delta Pros best price on the market. The code works on bundles too.

What’s in the Box

WellBots used FedEx for the delivery. It was a smooth experience. If you do not live on the ground floor, you will need a helping hand. The package will be humongous. Weighing around 100lbs, it is heavy as a mountain.

Do not attempt to carry this yourself. I did that mistake and I had to skip my gym session that day. Because it is so heavy, even taking it out of the box is not easy. Having an extra hand will help.

Note: If you live in an apartment or a gated community, do not let the delivery partner deliver this package to the leasing office. Ask them to deliver it to your door, if there is an option.

Package contents,

  • Delta Pro power station
  • AC charging cable
  • Solar charging cable
  • Car charging cable
  • Delta Pro to Smart Generator adapter
  • DC5521 to DC5525 cable (sometimes used for solar extension)
  • User manual
  • Warranty card (24-Month warranty. You can also register on Ecoflow’s website for digital confirmation)
  • Power station handle cover

First Impressions

Ecoflow is known for its aesthetics and futuristic look. Let us have a look at the build quality, different ports and controls on the device.

Build Quality

I am a huge fan of Ecoflow’s build quality. Their products are rugged yet aesthetic. Delta Pro is built extremely well. They used high-quality ABS plastic but some parts of the station feature rubber. Although the ports are well built, the side & back panel doors are not very smooth. I mean, it’s easy to open them but difficult to close.

Ecoflow Delta Pro, Bluetti EB150, Ecoflow River. Side by side.

There is a handle on either side of the power station but still, it is too difficult to carry it by one person. The luggage-like handle and the wheels on the lower back are new to Ecoflow Delta series but they are extremely helpful, especially when you are moving this thing around on a flat surface.

There are 4 cooling fans, 2 on either side. They make a ton of noise (more on this later). Overall, I am happy with the build quality.

  • Net weight: 100 lbs/45 kg
  • Dimensions: 25 x 11.2 x 16.4 inches


Output Ports

There is a total of 15 output ports on this device. Meaning, you can power 15 devices simultaneously with the Delta Pro generator.

Name Number of Ports Description
AC 20A 4 120V 60Hz Pure sine wave, 3600W total output with 7200W total surge
AC 30A 1 same as above
USB A 2 5V, 2.4A | 12W max power per port
USB A Fast Charge 2 5V, 2.4A | 9V, 2A | 12V, 1.5A | 18W max per port
USB C 2 Voltage ranges: 5/9/12/15/20V, max current: 5A. Max power of 100W per
DC5521 Output 2 12.6V, 3A | 38W per port
Car charging port 1 12.6V, 10A | 126W max power
Anderson Output 1 12.6V, 30A | maximum power of 378 watts

It’s a pity that all the AC ports are US type. It would have been extremely convenient to have at least one universal AC outlet. If you are to plug devices with EU/UK/etc, you will require an external adapter. For detailed ports specifications check the manual here.

DC5521 (or just DC port) is very helpful to power devices that take power via DC port. Devices like CPAP machines make use of DC ports very much.

The default standby time of AC ports is 12 hours. If the AC load is zero, then the AC power automatically turns off to save power loss.


Input Ports

There are 2 input ports both of which are used to recharge the battery

  • AC Charging input – 120V, 1800W Max | 240V 3000W Max
  • Solar/Car Charging input
    • Solar charger: 11-150V, 15A max, 1600W max input power
    • Car charger: Supports 12V or 24V battery. The default current rating is 8A

Other Ports

  • Infinity Port
  • Remote control port (ethernet port)
  • Extra battery port (x2)



Ecoflow Delta Pro can be controlled in several ways, traditional on-unit control, wired control (via ethernet port) and IoT/WiFi control via a smartphone app (more on this later).

Talking about on-unit control buttons. On the front, we have two buttons

  • Power button – Long press to turn on/off the power station. Quick press to wake up the LCD screen
  • AC power button – To turn on/off the AC output ports

On the back, we have two buttons

  • Overload protection switch – If the power station is overloaded, maybe by plugging in power-hungry devices, you can use this switch to reset the fuse.
  • AC charge speed switch – Allows you to control AC charging speed (in-depth info on this later)
    • Fast – This mode lets the power station draw more power from your wall outlet. More input power so faster recharge.
    • Slow – Draws lesser power from the wall socket but takes a while to fully recharge

On the side panel, we have 4 buttons

  • 12V DC power button – Lets you turn on/off DC ports
  • IoT reset button – To reset the WiFi connection
  • Pairing Button – For WiFi/Bluetooth pairing
  • Standby switch


Okay, I have used Ecoflow Delta and River 600 both of which are very portable and can be carried around by yourself. But, with a larger battery capacity, comes a higher weight. Weighing 100 pounds, Delta Pro is definitely not an easy-to-carry device. It is still portable but not very convenient to move.

Delta Pro in front of River 600

On a flat surface, you can make use of its luggage handle & wheels to move easily. Just press the button on the handle, pull it, pick it up and just roll. After you reach the endpoint, put it down, press the handle until it clicks and you are done.

The problem is with uneven surfaces/staircase/outdoor use. It is a two-person job. Don’t get me wrong, I carried it two floors up my apartment and it was crazy, I wouldn’t do it again, ever.

On the flip side, it is not like a traditional home UPS where you set it and forget it. Delta pro can still be taken to places but make sure you have some helping hands. Also, if you are thinking to purchase this solely for camping, I wouldn’t recommend it. I think EF Delta is just enough for that purpose.

Delta Pro can also be used in vertical mode, just like a luggage bag.

Now, let us have a look at the technical specifications of the Ecoflow Delta Pro power station. That’s where the money is right! Let’s talk about it

Power Capacity

When it comes to portable power stations, power and battery performance are the most important. Higher power means you can drive multiple and/or high-power appliances without having to worry about overloading the station.

Ecoflow DELTA Pro offers an output power of 3600W which is massive. The last time I wrote about a power station of this size was EP500.

To give you a context of how much 3600W power is,

TV + Laptop + Microwave Oven + Instant Pot cooker + 10 Light Bulbs + 1 Room Heater = 3600W (approx)

If I roam around my house and note down all the devices rated over 3600W power, I may find the HVAC system (window and portable ACs are well under 3.5k) and the electric water heater. That’s it! Everything else, including the electric stove, dryer, fridge, etc are under the 3.6kW mark. This means DELTA Pro can replace the traditional home inverters in most households.

Delta Pro powering a Microwave oven, an Omelette maker, and an Air purifier simultaneously. Total wattage 2300W

Not just for households, this much power is enough to drive many power tools in your workshop making this power station a good backup option for mobile workers, shops, small-sized offices and whatnot. For campers, you can stay comfortably in a jungle for weeks with this one. But good luck carrying it around.

To give you an example, my parents live in a 5 bedroom house and use a 2000VA UPS. A 2kVA UPS generates a power of about 1600W. Since they live in a rural area, frequent power outages are common. With this 1600W, they are living very comfortably. Apart from AC and cloth dryer, everything else works, even a half HP water pump. Now compare this with Delta Pro’s power rating. More than double!

That’s not all, there is X-BOOST


Delta Pro has a feature called X-Boost that can boost the output power to a whopping 4500W. For this, you will have to turn on the X Boost mode via the smartphone app. When turned on, the power station can power a 4500W max device and avoids operation failure due to overload protection.

Battery Capacity

Ecoflow Delta Pro power station features LFP batteries (lithium iron phosphate). This type of battery is found to be very efficient. Tesla is planning to use LFP batteries for its EVs.

In any power bank, battery capacity determines how long you can use the battery to power your devices. The higher, the better. DELTA Pro, featuring a 3600Wh battery, can continuously power any device <=3600W for atleast an hour. If the device is under 3600W, then more than one hour.

The math is simple and here it is,

Total backup duration = Power rating of a device / total battery capacity

Example: My TV has a power requirement of 80W. So, 80Watt divided by 3600Watt hours = 45 hours. This means the Delta Pro battery station can power my TV continuously for almost 2 days. This is under ideal conditions. In real world, it could be slightly less than 45 hours because no battery will be 100% efficient.

If you are thinking about whether 3600Wh is enough or not, start by listing down the most power-hungry device in your home. In my case, it would be my clothes dryer that consumes 2000W continuously. On Ecoflow Delta Pro, I can run my dryer for about 1.5 hours. If I am not wrong, my dryer takes about 70 minutes for full load drying. So, one full load for sure.

If you are planning to use it as a whole-home power station, you will have to keep in mind that there will be multiple devices hooked up.

A 2.2kW load is showing 1 hr backup time but it is more than that since does not show fractional numbers

Time to compare – my parents have two 150Ah 12V batteries. So, the total battery capacity would be 3600Wh which is the same as DELTA pro. This much juice is good enough to keep an average home running in the US (without HVAC of course)

Tip: If you live in a place that gets too cold/hot, portable battery stations may not be a great option for you. HVAC and water heating are vital in many cases and most power stations fail to cover those devices. A gas generator can be a good option in such cases.

The Battery is Expandable

Yes, Ecoflow Delta Pro’s battery capacity can be increased. In fact, it supports upto 25,000 Wh which is insane. You can either purchase Ecoflor Delta Pro smart extra battery or add another power station unit.

The extra battery ports on the back panel will help you achieve this. The process requires the use of the Double Voltage hub or Smart Home Panel kit. These accessories are sold separately.

Shelf life

Delta Pro’s LFP batteries have a shelf life of 1 year (after a full charge). Shelf life is the length of time a battery can remain in safe storage without losing its capacity. I used the word safe storage because if you store it under extreme temperature, the batteries die quickly.

If you are planning to buy this just as an emergency power backup and don’t expect to use it at least once every 2-3 months, please make a note/set a reminder to discharge and recharge it once every quarter. You don’t want to lose this huge investment because of negligence.

Cycle life

Battery cycle life is another important aspect. Cycle life is the number of charge and discharge cycles that a battery can have before losing performance.

Delta Pro’s battery has a cycle life of 3500 cycles to 80%+ capacity. So, even if you discharge and recharge this power station every day, it lasts for 10 years? I don’t have enough data on this but we should rely on the manufacturer’s words.

Storage and Maintenance

It is worth to be noted that storing a battery (any battery) with a low charge for a long period shortens its lifespan. This is the reason auto experts suggest you turn on your auto engine at least once every two months.

Fortunately, DELTA pro minimizes battery damage by putting the battery into hibernation mode. The manufacturer, however, recommends keeping the battery at around 60% before putting the power station into long-term storage. It is also recommended to discharge the battery to 30% and recharge it back to 60% once every 3 months.

The ideal storage temperature would be between 70°F to 85°F. Keep it away from water and make sure not to store in temp above 110°F or below 15°F for a long time. High temperature is extremely bad and can quickly degrade battery efficiency.

Warning: DO NOT use this product near water without a waterproof or atleast a water-resistant bag. If water gets in the battery area, it will be a huge mess. Better to be safe than sorry.

For detailed info on maintenance and FAQs, refer to the official manual

Battery Protection

The technology is so advanced now that you don’t have to worry about damaging the battery. Equipped with Ecoflow’s intelligent silicon chip, Delta Pro power station has,

  • Over voltage protection
  • Overload protection
  • Over temperature protection
  • Short circuit protection
  • Low temperature protection
  • Low voltage protection and
  • Overcurrent protection

Uhh, that’s a lot of protection. I don’t know, maybe there is nuclear attack protection too! This power station is perfect for doomsday bunkers lol

Overload protection in action

Surge Capacity

We have a whopping 7200W surge rating. This means the power station can provide 7200W for a brief period of time (typically several seconds). Surge is very helpful when you are using coil-based electronic devices like pumps, heaters, ovens, motors, etc.

The concept is simple, some power-hungry devices require more power while starting. For example, a microwave oven takes twice as much power in the initial few seconds. After that, the intake reduces drastically. Surge capacity will be used in such cases.

In general, having a surge rating of 7200W is beneficial because it covers most if not all devices. People who work with power tools will get the highest benefits out of it.

LCD Display

Ecoflow DELTA Pro has the most informational display I’ve ever seen in any battery device. Wow, this display even has a carbon monoxide alert, how cool is that! Also, the display is bright enough to be seen under the sun.

There are 23 indicators on the display and it would be easier for you to understand if I attach a picture instead of text.

Ecoflow Smartphone App

When Ecoflow released its River 600 power station, it launched its new mobile app to enable IoT operations. DELTA Pro is their second battery station with smart control functions. The battery station connects to the phone either via Bluetooth or WiFi. If you choose WiFi, you can control this device from anywhere in the world. Refer to the Remote Control guide for more illustrations.

When you receive the product, download the app and pair the device with your phone. You may be asked to update the firmware, do it. Sometimes, firmware updates screw up the connection settings. If so, reset Delta Pro by pressing the IoT button and reconnecting to your phone.

Once done, you can explore different options. The app has sick animations and is very user-friendly. It displays input and output wattage. Individual port outputs and whatnot. You can also turn on/pff X-Boost, AC and DC power.

Apart from these, you can also configure various settings like charge/discharge level, AC charge speed, timeout, etc.

Note: There is a small delay in data sync. The LCD display on the device is realtime while the data on the app is delayed by a second or two.

Charging Ecoflow DELTA Pro

There are several ways to charge this battery station. You can also combine one or more for faster charging.

AC Charging via X-Stream Technology

This is charging from a traditional wall outlet. Delta Pro supports X-Stream which is a fast charge technology. This offers upto 1800W power input. You can control the charging power through the AC charge speed switch at the back panel.

If set to fast, the station draws a max of 1800W from the grid (wall outlet). Typically takes about 3 hours to fully charge. I always charge it in fast mode and I see around 1600W input on the display.

Ther is a customizable/slow mode. Here you can select the charging power from 200W to 1800W. The default is 400W. The range can be modified via Ecoflow app only. Slow charging is helpful when you are on a limited power line and want to ensure you are not overloading the power source.

Solar Charging

Nowadays, every portable power station supports solar panel input. With Ecoflow Delta Pro, you can use up to 1600W solar input to recharge the batteries.

The included MC4 to solar charging port cable lets you connect to your solar panel. If you are using more than one panel, connect them in series. Make sure the DC input voltage lives between 11-150V with 15A max current.

I tried solar charging by connecting my Ecoflow 110V foldable solar panel to it. It works well. There is a solar input indicator on the display along with input wattage. For households, I recommend using a rooftop solar kit. For outdoor/travel use, get a portable solar panel. These are the ones I recommend.

Car Charging

We can also recharge the product through the car outlet. It supports 12V/24V car chargers and 8A current input. Only use this while your car is started/running to avoid battery drainage. The charging cable is included in the package.

EV Charging via Infinity Port

You can use EV charging stations to quickly recharge DELTA Pro. With Infinity port, you can draw up to 3400W input to fully charge in under 2 hours. For detailed info on Delta Pro EV X-Stream Adapter, check this manual.

Performance of DELTA Pro

Let us now see some of the devices that can be powered by Ecoflow DELTA Pro and the duration.

Just to test, I charged this battery generator to 100% and hooked up my laptop and two monitors to it. It ended up powering them continuously for a day before dying. My MSI gaming laptop is very power hungry.

Delta pro sitting under my desk, powering my laptop + 2 monitors
Appliance Will it work? Backup time (approx)
Laptop (80W) Yes 100+ Times
LCD TV (150W) Yes 24 Hours
Smartphone (8W) Yes 500+ Times
Refrigerator (150W) Yes 3+ Days
Ceiling Fan (52 inch) Yes 2+ Days
Microwave Oven (1100W) Yes 3+ Hours
Instant Pot Cooker (1000W) Yes 3.5 Hours
Space Heater (800W) Yes 4 Hours
Corded Drilling Machine (600W) Yes 6+ Hours
Washing Machine (900W) Yes 4 Hours
CPAP Machine (60W) Yes 10+ Nights
Wall Mounted AC (8000Btu) Yes 1.5+ Hours
Electric Kettle (1300W) Yes 2+ Hours
Circular Saw (2300W) Yes 1.5+ Hours
Welding Machine (1800W) Yes 2 Hours
Electric Bike (500W) Yes 100+ Miles
Coffee Maker (750W) Yes 4 Hours
HVAC (5000W) No
Electric Water Heater (4000W) No

*These values are approximate. The actual duration may differ depending on factors like battery efficiency, device characteristics, etc

Noise/Sound During Operation

The biggest issue with the DELTA Pro portable generator is its sound. It is so annoying. I have used different power stations before, mostly of lower capacities like 1500Wh or so and they were quiet during operation. With a larger capacity comes louder noise. Delta Pro makes so much noise that I stopped charging it when I am around.

The video shows charging sound. At full load, the operating sound is twice as much as this. You can hear the sound from the second floor too.

This power station uses fans to keep itself cool. There are 4 fans and they turn on continuously while charging and intermittently when powering a load (continuous when the load is high). It is so loud, that I sometimes feel distracted, esp during meetings. I do not recommend keeping the unit near you at all. It is just worse.

Does not matter if the input power is 400W or 1800W, it is always on during charging. Same while delivering power.

If the load is very small (say 30W), the fans are off. If it is something like 150W, the fans turn on once in a few minutes. If it’s a heavy load, the fans are continuously on. I am not saying there should be a way to turn them off but it would have been great if there was an option to minimize the noise.

I give 3/10 stars for this section. Very disappointing.

My Experience and Verdict

I have been using DELTA Pro for over a month now and so far, except for the noise, I am loving this device. It is advanced, smart and is like a swiss army knife of power stations. Has every possible port, aesthetic look and insane capacities.

Note: The first time when I used it to power my laptop and monitors, I got the ‘new electronics’ smell which is scary but common. The smell disappeared after a couple of days of use

Personally, I use portable power stations during road trips/outdoor activities. But people who live in rural areas might make use of it well. Especially, those who are prone to frequent power outages, storms, etc. I did use my stations during the last winter storm here in Texas.

If you are using this as backup power, go for it. With such huge capacities and battery life cycles, you can definitely replace your home UPS with this. It supports direct grid to appliance operation which is cool.

BUT, if you are planning to buy this just as an emergency power source, I do not recommend battery stations. Mainly because battery generators need to store power to deliver power. If your outage lasts for weeks, then you are doomed. I know it is eco-friendly, more effective but still, a diesel generator might be a better option here.

With that being said, I think Ecoflow DELTA Pro is best for RV owners, mobile workers, small workshops, small businesses/shops, home offices and residential homes in general. If I live in an apartment, I would get Ecoflow Delta instead of Delta Pro.

Delta Pro Coupon Alert

Use coupon code KD29PGGF to get an additional $200 off on Ecoflow DELTA Pro here. The cheapest on the market. The code works on bundles too.

I spent a lot of time testing out this product and writing this article. I hope this Ecoflow Delta Pro review was helpful to you. If you have any questions related to the product or have comments/experiences to share, please leave them in the comment section below. I appreciate it.



  • Aesthetic and Rugged
  • Battery quality is top notch
  • Great Performance
  • High Power & Surge outputs
  • Lots of Ports
  • Smart Device
  • Mobile App is Sick!
  • The best LCD display I've seen
  • Expandable Capacity
  • Fast AC Charging 0-100% in less than 3 hours
  • Wide solar panel input range
  • Can replace a home UPS


  • Noisy as hell
  • Very Heavy
  • Expensive Product
Design & Build Quality
IoT and Smartphone App
Battery Quality
Power & Surge
Quiet Operation