Delta 2 Smart Extra Battery, 1024Wh LiFePO4 Expansion Battery for Power Station DELTA2

The EF ECOFLOW DELTA 2 with a 220W solar panel is an excellent option for home backup power. It features a safe and long-lasting LFP battery, fast charging via both AC and solar power, and quiet operation. Its portable and user-friendly design allows you to power several essential devices during power outages. It offers very good quality and performance.

I read a lot of reviews and watched many videos before buying the Ecoflow Delta2. My main use for this Delta2 is for overnight camping trips and use as a back-up power in case of black-out conditions to run some equipment like Refrigerator and be able to heat food using the microwave. Delta2 doesn't have the battery capacity like Delta Pro but with a good solar panel it can definitely come handy when required. One can always add an additional battery that again works seamlessly to extend the battery capacity or buy the Ecoflow Smart Generator. I was debating between Bluetti EB70s and Ecofow Delta2. The reason I bought Delta 2 over Bluetti was the battery capacity. Delta 2 provides 1024WH as compared to the 716WH from the EB70s. Delta 2 met the power requirements that I was looking for. I could not find any offering by Bluetti in the range of 1000WH capacity. Delta 2 was of course more expensive than Bluetti but the surge power (also called X-BOOST by Ecoflow) is really high. So running a microwave for a short time or a coffee machine at a campsite or picnic is not an issue at all. I bought a combo pack (Delta 2 and solar panel). More about this combo later in the review. The other reason was the 5 year warranty that comes with the Ecoflow Delta2 vs 2 years for Bluetti. Some models from Bluetti do offer 4 years but were expensive for my use. Below are a few things I like about Ecoflow Delta2 after using it for sometime. 1) Construction - This is a solid built product. The bottom edges have these rubber bumpers for extra protection. The form factor is designed well to fit in the car. I hope the handles were not protruding out as they are now and were more integrated into the main box. The box is strong and one can easily put heavy items on the top without any issues. With the LFP battery and 3000 battery cycles, the Delta 2 will last forever. 2) Display - It's big and clear. Very easy to read even on a bright day. All the connections that are turned on are shown on the display even when a load is not connected but for USB only when a load is connected, the icon is displayed. Not sure why only the USB icon behaves like that. Not an issue at all but just wondering why a different behavior as compared to other connections. 3) App and Connectivity - The phone app works great and it's very easy to use. There are so many options that you can set via the app. Connecting the Delta 2 to the app was a breeze. It connects to WiFi without any issue and also to bluetooth. The app shows correct data 99.9% of the time. Once in a while you have to refresh (close/open) the app to get the latest data. It is very rare but I did notice it. When the WiFi is available, the Delta 2 connects via WiFi. If there is no WiFi connection, it automatically switches to Bluetooth connection. The connection is just seamless and you are always connected to the Delta 2. 4) Charging - Delta 2 can charge at a whopping 1200W to be ready from 0% to 100% in about just 80 minutes. The fans do kick-in to dissipate all the heat generated during this fast charging. I personally charge the unit at 500 W with fan running but much less noisier and may be better for the battery life. The solar charging can go up to 500 W. I don't have enough solar panels to check that max limit but this can be a really handy feature during a blackout conditions or with limited hours of sun during camping. One can charge the battery before leaving camping or any other work. Charge while driving from the 12V DC outlet in the car (Also known as the Cigarette lighter port) and the battery will be 100% when you reach your camp/work site. 5) Output Connections - There are more than enough connections that one can use, in my view. With a massive 1800 W peak capacity and 2700 W of surge capacity, I think you can run almost any home appliance with this Delta 2. The provided ports like USB A, USB C, Power Outlets and 12 V (Car type) are good to power any device you may have. Now coming to the combo I got. I bought the combo of Delta 2 and Solar Panels that were rigid. I was not happy with the size and format of rigid panels so I reached the Ecoflow support team. Even though I made that choice and now wanted to get portable panels, the Ecoflow team worked with me. The support team was amazing with quick responses and answering all the questions I had. It was good to see Ecoflow believes in good customer service that still cares about their customers. One of the best customer service teams I have worked with. One option that I would like Ecoflow to add will be to set the discharging and charging percentages even when connected to the power outlet. I would like to connect a solar panel for charging and connect my garage refrigerator to Delta 2 and use the battery power. If the battery falls below a certain level (let's say 30%) it can charge via the power outlet, else the refrigerator can keep running via the solar power. This option is provided when you connect a Ecoflow smart generator to Delta 2 but not when connected to a power outlet. I hope Ecoflow will implement this feature in the future software update.

Excellent portable power station. The EcoFlow 1800W has plenty of power, charges quickly, and is very reliable. I've used it for power tools, small appliances, and as a backup during power outages, and it has worked perfectly. The battery lasts a long time, and the app is very convenient for monitoring power consumption. High-quality product, highly recommended.

I’m really impressed with this portable power station — it’s become an essential part of our home backup setup and outdoor adventures. It delivers strong power output with multiple outlets, allowing us to run phones, laptops, appliances, and more without any issues. The high capacity and expandable options give peace of mind during power outages or long trips. Charging is fast and convenient, whether from mains, a car, or solar panels, and the whole unit feels sturdy and well built. It’s also easy to monitor and control through the app, which adds a lot of convenience. Great value for the performance and reliability it offers!

I got this to do computer work while camping. I used my computer 4 to 6 hours each day for four months, and kept two phones charged. The Eoflow worked better than I had hoped. I never ran out of power. The android app connects easily via bluetooth and is easy to navigate. It's lighter than I anticipated. I wouldn't try to hike with it, but for car camping it's fine. Both the Ecoflow and the panels are made of quality materials and seem rather durable. I'm very happy with this purchase. ( I did buy an extra set of portable solar panels because I knew I would need the extra solar collection on partly cloudy days. )

What can I say - Ecoflow has breen one of the major players in the Portable Power Station market for several years. Their products are well regarded for their quality, capacity, durability and function! The Delta 2 has been a stalwart in the mid-level, 1024Wh space for a while and when Amazon reduced the price to the level I found this, it was a no-brainer to grab one. As expected, it works flawlessly. It is more compact than one might imagine. The design with the built in carrying handles makes it exceptionally easy to move around. At 27lbs, it has some heft to it but it is still easy enough to get it where you want it. The display is intuitive and gives you a quick and easy look at power in/out, remaining life, battery percentage, etc. Battery life has been on par with what I expect for a station with its rated capacity. Charging with the included AC cord from a standard 110v outlet has been exceptional! It really charges quickly. With the LiFePO4 battery, you can expect 3000+ charge cycles or about 10 years before the battery falls to 80% capacity. Even then, the device will still deliver! Ecoflow also has a matching spare battery that simply plugs into a port on the side of this unit and effectively doubles your capacity. They have been offering it at a very reasonable price as well. With that, you have a very capable power station that could provide quite a bit of power, all for less than $750 - which is what these 1024Wh units sold for all by themselves less than a year ago!

This thing is amazing, after impacted by Hurricane Melissa in Jamaica, I bought this to try and have some form of normalcy and it has been a life changer. I'm impressed with how many things it can power at once, battery life is amazing, because it can run my TV and my fan for about 6 hours before it needs to recharge, the sturdy handles makes it easy to carry and I use it daily to keep my devices charged. I just need to get another battery to make it more useful but overall it's a good buy

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