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.
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Product Description
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EcoFlow's DELTA Series is recognized by some of the most prestigious international awards. The flagship product of the Series - DELTA Pro, was named in TIME's list of 100 Best Inventions of 2021. It also won the 2022 Red Dot Design Award along with its ecosystem accessories. The 2022 iF DESIGN AWARD named the DELTA Pro, DELTA Max, 400W Solar Panel, and Smart Generator the winners in the product discipline.
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Ditch Gas, Go Solar
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This Item  EF ECOFLOW Portable Power Station DELTA2 with Smart Extra Battery, Expand Capacity from 1024Wh to 2048Wh, Solar Generator for Home Backup, Emergency, Outdoor Camping |  |  |  |  |  | |
| Price | -6% $1,698.00 Typical: $1,798.00 | $2,699.00 | $2,499.00 | -5% $3,999.00 List: $4,199.00 | $5,699.00 | -43% $169.00 List: $299.00 |
| Delivery | Get it May 16 - 17 | Get it May 16 - 17 | Get it May 16 - 17 | Get it May 16 - 17 | Get it May 16 - 17 | Get it May 17 - 21 |
| Customer Ratings | ||||||
| Charging power | ||||||
| Noise level | ||||||
| Value for money | ||||||
| Portability | ||||||
| Battery life | ||||||
| Sold By | EF ECOFLOW-US | EF ECOFLOW-US | EF ECOFLOW-US | EF ECOFLOW-US | EF ECOFLOW-US | ECOFLOW Direct |
| fuel type | — | Electric | Electric | Non-gasoline | Electric | electric |
| power source | Solar Powered | Battery Powered, Solar Powered | Solar Powered | Battery Powered, Solar Powered, Gas Powered | Battery Powered | Solar Powered |
| engine type | 4 Stroke | — | 4 Stroke | 4 Stroke | 4 Stroke | 4 Stroke |
| output wattage | 1800 watts | 2400 watts | — | — | — | 600 watts |
| runtime | — | 65 minutes | 43 minutes | — | 3.5 hours | 3 hours |
| wattage | 1800 watts | 4032 watt hours | 4096 watt hours | 3600 watt hours | 1800 watts | 600 watts |
Reviews with images
Really fast charging, but also really loud fan (for up to 60 mins). Excellent engineering otherwise
EcoFlow announced the Delta 2 power station at IFA Berlin 2022 with the tagline of: “Not Just a Battery.” It was available for purchase on September 16, 2022. After their excellent Delta Pro we reviewed not too long ago for our vacation home, we were very intrigued by what this new product could do, and how it would compare against Goal Zero and Jackery.The Delta 2’s 1,024Wh battery capacity — how long something can run for — and price point puts it right in direct competition with the identically priced Goal Zero Yeti 1000x and Yeti 1000 Core, Jackery Explorer 1000, and its own predecessor, the EcoFlow Delta 1000 — but with one major change. Instead of using Nickel Manganese Cobalt (NMC), the Delta 2 now uses Lithium Iron Phosphate (LiFePO4) like its more powerful Delta Pro sibling. There are significant differences between both Lithium-ion (Li-ion) battery chemistries that I will detail later.How much energy a battery can store is measured in Wh (Watt-hours), and how much power is used or produced in W (Watts).Goal Zero launched the Yeti 1000 Core power station on July 16, 2021, five weeks after the flagship Yeti 1000x was available for purchase, and the Delta 2 packs more powerful features with its announcement a year later:- LiFePO4 battery chemistry (Pros and Cons to that over NMC)- 1,200W AC charging input-- Rapid-charging from 0 to 80% in an unheard of 50 minutes — a claim I personally verified to be accurate--- Test #2: 36% to 88% in 32 minutes (4:34pm to 5:06pm)-- Fans were VERY loud during that time and significantly got more quiet around the 90% charged mark--- If fan noise is important to you because of a tight sleeping quarter, be mindful of that. On the other hand, it would only take 50 minutes to go from 0 to 80% charge. So, charge before you go to sleep.FAN TOO LOUD?You can lower the charging speed from 1200w to 600w via the app, and the fan won't be as loud.- 500W solar charging input (11-60V @ 15A)- Whopping 15 outlets-- AC output at a Continuous 1,800W and Peak of 2,700W-- X-Boost output at 2,200W-- USB-C at 100W- Mobile app control via WiFi or Bluetooth- Near-instant auto-switching between AC and battery power-- Makes it suitable for use as a Standby Power Supply (SPS) during a blackout- Expansion options-- Battery capacity expansion to a total of 2,048Wh or 3,040Wh with the Delta 2 Extra Battery (+1,024Wh) or Delta Max Extra Battery (+2,016Wh), respectively--- Only the Goal Zero Yeti 1000x (983Wh) has expansion capabilities in this 1,000Wh-battery roundup to a total of 5,783Wh (938Wh + four 1,200Wh Yeti Tanks)-- Connectivity with solar panels, the EcoFlow Wave portable air conditioner, and EcoFlow Smart Generator- 5-year warrantyEcoFlow, Goal Zero, and Jackery power stations can be used while simultaneously charging themselves.Sweet Spot: The 1000Wh battery capacity hits the sweet spot for many consumers, including this author, who are looking for the right balance of power and portability. But when it comes to home integration, the more Watt-hours a battery ecosystem offers, the longer one can power a home for during a blackout.PAIRING WITH EXTRA BATTERYI paired the Delta 2 Extra Battery (EB) with this Delta 2 power station. I was happy to see that chaining the EB to the Delta 2 and charging it from the AC wall produced about 1100W of input. This fully charged the EB in about an hour. Without the AC wall, it sipped only about 54W directly from the Delta 2 -- this would charge an empty EB from 0 to 100% in 19 hours.When plugged in to the AC wall, the Delta 2's fans were very loud just like when it charged standalone at 1100-1200W input. Once the Extra Battery was at around 90%, charging dropped to roughly 700W and the Delta 2's fans lowered manageably quieter.Note: Delta 2 Extra Battery cannot be independently charged. It must be connected to the Delta 2.BATTERY TECHNOLOGYThere has been a lot of debate on whether Nickel Manganese Cobalt (NMC) or Lithium Iron Phosphate (LiFePO4) is better. Both are Lithium-ion batteries. Goal Zero, Jackery, and most of today’s power station manufacturers use NMC, but why do EcoFlow and Bluetti use LiFePO4 when they are bulkier and heavier? They hold some important advantages over NMC:- Safer, less volatile, and thus cheaper to manufacture- Charge cycle: 1500-2000 (10+ years)-- NMC: 20-25% capacity loss after every 500 cycle (6-10 years for up to 2000 cycles, after which capacity is vastly diminished)-- EcoFlow claims 3500 cycles before dropping to 80% of original capacity and 6500 to 50%. Those are some VERY optimistic projections that I do not think are accurate in actual usage- Usable in more extreme temperatures (-4F/-20C to 176F/80C). NMC: only 140F/60C max-- Check with manufacturer for your battery to be sure- Holds 350-day charge. NMC: 300LiFePO4 batteries are less volatile (safer), more usable in extreme temperatures, and have a higher charge cycle count (battery lifetime) than NMC.CAUTION: Lithium-ion batteries do NOT like to remain discharged at 0% for prolonged periods of time. If you let your battery stay at 0% for too long, you may not be able to charge it again without specialized equipment.CONTINUOUS VS PEAK OUTPUTIt is important to understand the difference between Watts and Watt-Hours. How much power is used or produced is measured in Watts, and how much energy a battery can store is calculated in Watt-Hours. See the “Calculations” section below for more details.How much energy a battery can store is measured in Wh (Watt-hours), and how much power is used or produced in W (Watts).- AC Inverter: Converts battery (DC) power into AC-- Delta 2 provides 1,800W continuous output with a 2,700W peak- Peak/Surge (Starting): Nearly every device initially draws extra power to turn on. The highest amount it pulls is the Peak. As long as that number is below 2,700W, it can be STARTED. Examples…-- Turns on OK (PEAK under 2,700W):--- Freezer starts at 400W (peak), runs at 150W once on-- Will NOT turn on (PEAK over 2,700W):--- Home AC starts at 4,000W (peak), runs at 1,000W once onMost devices power on at a higher (Peak) wattage than when they are already on (Continuous). Therefore, if its peak exceeds the power station's max, it may not be able to start- Continuous Output (Running): Once devices are on, as long as they keep drawing less than 1,200W total, they will stay ON until the battery runs out-- CONTINUES running (under 1,800W)--- 100W TV + 60W laptop = 160W-- COULD STOP running (over 1,800W)--- Temporary overdrawing beyond 1,800W for a few seconds is okay. A quality BMS will protectively shut down the battery if the surge does not end after a while. Regularly going over for a prolonged time can ruin the battery in the long run--- 1,000W machine (2,100W peak) + 300W appliance (500W peak) + 700W appliance (900W peak) = 2,000W. Probably will stay on for a short period---- Add 1,000W mower (1,400W peak) = 2,300W. Battery will definitely shut downCALCULATIONSThe below calculations are rough ESTIMATES as conditions, battery quality, and age can vary. [SORRY: I had to shorten my original review by a LOT (including many calculations) so it could fit here on Amazon.]Time to Charge This 1,024Wh Power Station- Calc: Hours to charge battery = Battery capacity (Wh) / Input Wattage-- As battery approaches 75% full, the input charge will increasingly be slowed down to prevent overcharging- AC Wall: 1180W @ 52 mins [1024 Wh / 1180W]- 12V Car Charger-- 120W @ 8.6 hrs (at 10A, if car supports it)Charge Time with Solar- Calc: Hours to charge battery = Battery capacity (Wh) / (Panel Wattage x [0.5 or 0.75])-- In a perfect lab, solar panels charge at the listed wattage-- Expect to only receive 50-75% on a good, sunny day (ie. 75W – 113W for a 150W panel), depending on panel's age, component quality, and weather- 200W solar panel: as fast as 6.9 hours [1024Wh / (200W x 0.75)]- Underproduction: If a panel is not making enough, adding extra ones can generate a higher, combined output- Overproduction: If the panels make more than the maximum the power station charge port can take, only the max will go throughWatts Used/Produced by a Device- Calc: Watts used or produced by device = Voltage x Amperage- Vacuum with 120V @ 9.5A uses 1,140W- Solar panel with 12V @ 10A can produce up to 120WIdeal Battery Power Station Size- Calc: Battery capacity (Wh) = Watts used by device x Hours needed for / 0.85-- 10-15% of power is lost during power conversion- 45W car fridge needed for 8 hours: Minimum 424Wh power station (45W x 8 / 0.85)FINAL THOUGHTSEcoFlow thoroughly impressed us with their Delta Pro power station and quickly added the company to our list of recommended battery providers. Their newest Delta 2, now a LiFePO4 product, further surprised us with 1,200W rapid-charging that took the battery from 0 to 80% in a whopping 50 minutes! Had we not seen that in person, we would have dismissed it as a marketing gimmick, but we were proven wrong. Add to that the ability to have its capacity and features expanded with additional products, and the Delta 2 makes for a VERY compelling choice against Goal Zero’s own Yeti 1000x that is starting to show its age. Jackery, on the other hand, is extremely difficult to recommend against the Delta 2, except that they have excellent customer service and consumer-friendly policies.
Top reviews from the United States
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Reviewed in the United States on April 30, 2024
I bought the Delta 2 to power things around the house during hurricane power outages. After using the unit, I can say that I am very pleased with my decision.
It tested it to power our fridge which is 120v 21 Cu Ft top freezer fridge. The unit powered the fridge continuously for 14 hours on a single full charge (from 100% to 0%). During this test, we used the fridge as we normally use it. You can see the attached chart that shows the discharge from 100% to 0% over 14 hours.
I also tested the fall-through charging feature that allows you to use the unit while you are charging it which means you can use it as UPS (uninterrupted Power Supply). The attached video shows the test with a 55” TV, Dish Receiver, and a Sound Bar. When I unplugged the Delta 2, the three devices continued working without interruption.
After these tests, I was encouraged to buy a second unit to have the flexibility of powering more devices or to use one while charging the other.
Pros:
-LiFePO4 battery, which means more recharge cycles and longer life.
-Very well-built. One of the units was knocked down from the kitchen counter to the floor and there wasn't even a scratch.
-Very fast charging. From 0 to 100% in 59 minutes.
-Connects to your phone using Bluetooth and Wi-Fi.
-The phone app is very good. You can use it to check the status, configure the unit, and turn on or off the outputs.
-Set up and configuration is so easy through the app.
-It supports Fall-through charging meaning you can charge it as you use it at the same time.
-Can be used as UPS.
-Very knowledgeable and helpful customer service.
Cons:
-The extra battery can be charged only by connecting it to the Delta 2 unit. You can’t charge it separately.
-The fan gets a little bit loud sometimes. Honestly, this can’t be compared to the noise a gas generator makes.
-The user manual doesn't include information about SOC calibration that needs to be done from time to time. I had to call customer service to get the information.
Style: DELTA 2Verified Purchase
It can power a 21 Cu. Ft. Fridge for 14 hours
Reviewed in the United States on April 30, 2024
This review is for Ecoflow Delta 2 1024wh.Reviewed in the United States on April 30, 2024
I bought the Delta 2 to power things around the house during hurricane power outages. After using the unit, I can say that I am very pleased with my decision.
It tested it to power our fridge which is 120v 21 Cu Ft top freezer fridge. The unit powered the fridge continuously for 14 hours on a single full charge (from 100% to 0%). During this test, we used the fridge as we normally use it. You can see the attached chart that shows the discharge from 100% to 0% over 14 hours.
I also tested the fall-through charging feature that allows you to use the unit while you are charging it which means you can use it as UPS (uninterrupted Power Supply). The attached video shows the test with a 55” TV, Dish Receiver, and a Sound Bar. When I unplugged the Delta 2, the three devices continued working without interruption.
After these tests, I was encouraged to buy a second unit to have the flexibility of powering more devices or to use one while charging the other.
Pros:
-LiFePO4 battery, which means more recharge cycles and longer life.
-Very well-built. One of the units was knocked down from the kitchen counter to the floor and there wasn't even a scratch.
-Very fast charging. From 0 to 100% in 59 minutes.
-Connects to your phone using Bluetooth and Wi-Fi.
-The phone app is very good. You can use it to check the status, configure the unit, and turn on or off the outputs.
-Set up and configuration is so easy through the app.
-It supports Fall-through charging meaning you can charge it as you use it at the same time.
-Can be used as UPS.
-Very knowledgeable and helpful customer service.
Cons:
-The extra battery can be charged only by connecting it to the Delta 2 unit. You can’t charge it separately.
-The fan gets a little bit loud sometimes. Honestly, this can’t be compared to the noise a gas generator makes.
-The user manual doesn't include information about SOC calibration that needs to be done from time to time. I had to call customer service to get the information.
Images in this review
Top reviews from other countries
Gregory H.
Simple to use. Performance as advertised.
Reviewed in Canada on April 25, 2023Style: DELTA 2Verified Purchase
CPFUN
Power and flexibility when working at home
Reviewed in Canada on November 11, 2023Style: DELTA 2Verified Purchase
Anonymous
Already knew I wanted this product
Reviewed in Canada on March 30, 2024Style: DELTA 2Verified Purchase
Anonymous
Reviewed in Canada on March 30, 2024
Images in this review
