Description
- Clean, Green Charging. With up to 500W of solar panel input, DELTA 2 is a solar generator that can be charged while camping, on an RV trip or off-grid. Includes a 220W Bifacial solar panel to capture up to 25% more energy.
- Built to Last 6x Longer. Its LFP battery chemistry makes for a portable power station with a 3000+ cycle life. Enough for years on end of use. With a sophisticated BMS, you can go easy knowing its an auto-regulating portable battery to keep you safe.
- Power Almost Anything. Solar powered generator have come a long way. Power all your appliances with 1800W output, that’s on par with outdoor generators without the fumes or noise. With 15 outlets and its huge output, you can power 90% of your appliances.
- Expandable Capacity from 1-3kWh. With the standalone portable power station sporting 1kWh, you can add on extra batteries to reach up to 3kWh. Ideal for camping, RVs or home backup power.
- What you Get. DELTA 2 Power station, 220W Solar panel, Adjustable kickstand case, AC charging cable, Car charging cable, Solar charging cable, DC5521 to DC5525 cable, User manual, and an exclusive 5 customer service.
- *DELTA 2 and 220W Portable Solar Panel will be shipped separately.
TechGuy –
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.
Kclamwi –
We have two ecoflow delta 2 batteries and another support battery. We bought our first one last year with a solar panel and this year another delta 2 battery with the extra attached support battery. We live out of town in a heavily forested area, so we get a lot of power outages. Having these batteries has been very useful and gives us some peace of mind. The ecoflow equipment is all very good quality with several different plug in options so you can set it up if you think you might lose power and it come on immediately if your power goes out and depending on the amount of power you want to draw, they will last for several hours. With the solar panel as a back up, we feel very safe. The batteries are also very portable and could be used for camping, or just moved around the house as your needs change.
Gregory H. –
Best part is the ease of use. Plug stuff in, push the little ‘AC’ or ‘USB’ on buttons and it just works. This unit keeps us powered remotely for exactly 3 days at a time between recharges – running light power tools (drills, etc.) and all the LED lights in our shipping container, plus charging phones, laptops and tablets. Fast recharge is great. We found it charges 10% per hour with the DC car charger while driving, and it’s probably somewhat helpful for the life of the unit to have it charge slowly like this. Very pleased with it so far.
Six month update – this continues to be one incredible power pack. Built an entire off-grid cabin from the ground up (including running the cement mixer) using only it and dual 100w solar panels to charge during the day. Also runs a log splitter like a champ. Only issue we had was recurring shutoffs last week with a blinking fan warning light indicating (apparently – who reads the manual until they have to?) a blocked fan. Blew about a pound of sawdust out of the poor little unit and she was back to working like new. Pro tip: Don’t set this under the table saw while cutting hundreds of 2×6’s! 😉
Love the ability to access so much info (state of charge as %, time to charge, wattage draw in-and-out, etc.) via the digital display. We can keep an eye on it minute-by-minute to know when we have to plan a break to recharge and then still have power for overnight camp use.
Looking forward to picking up one of the new Ecoflow ‘Ultra’ power packs in future, given how pleased we are with this smaller unit.
YuenX –
I recently got the ECOFLOW Portable Power Station DELTA 2, and it has been a game-changer during the rolling blackouts we’ve been having. It’s compact and easy to carry, yet powerful enough to keep my essential devices running. The app is super easy to use and lets me monitor and control everything from my phone. During the last blackout, I was able to keep my fridge, phone, and a few lights on for hours without any issues. Plus, it charges quickly, so I know I can rely on it whenever I need it.
The variety of output ports is a huge plus, with multiple AC outlets, USB ports, and even a DC carport, making it versatile for different needs. I’ve also taken it on camping trips, and it has performed flawlessly. Overall, the ECOFLOW DELTA 2 is a fantastic investment for anyone needing a reliable and easy-to-use power station. If you’re looking for peace of mind during power outages, I highly recommend giving it a try
YuenX –
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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 warranty
EcoFlow, 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 BATTERY
I 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 TECHNOLOGY
There 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: 300
LiFePO4 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 OUTPUT
It 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 on
Most 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 down
CALCULATIONS
The 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 through
Watts 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 120W
Ideal 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 THOUGHTS
EcoFlow 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.
Moto –
Lo compré en marzo pero solo funcionó durante una semana y luego comenzó a reiniciarse cada pocos minutos, por lo que ahora no puedes usarlo sin ir y venir y hacer clic en el botón de inicio. Entonces me puse en contacto con el servicio de garantía oficial pero, después de 2 semanas de correos electrónicos con ellos, se negaron a ayudarme y me dijeron que me pusiera en contacto con un vendedor de Amazon para obtener una garantía (lo cual parece sospechoso). Pero el vendedor ya lleva unos días sin responder. Ahora tengo una unidad rota sin soporte alguno.
Andrew D. –
A second update has been added to the end of this review.
A quick update: The power station sat for a couple of months after the most recent charge. Today I decided to discharge and recharge it. It still showed 100% charge when turned on and ran a small portable room air conditioner for over half an hour. It still had 50% charge and didn’t get even slightly warm. The AC unit draws about 900 watts.
This is truly an impressive device!
Original review:
I have used this power station only for a few days and so far it has proven to be easy to use and it delivers the performance advertised.
It is quick to charge, even at a much lower charge rate than maximum. It is not particularly loud when charging.
I have tested it by using it to power my CPAP machine. In this application, it is silent. I calculate it would be able to operate the CPAP machine between 4 and 7 nights. My machine heats the humidifier water and the breathing tube. Other machines might do even better if they don’t have these features.
We recently experienced a once-every-30-year ice storm and were without electricity for about 4 ½ days. I wish I had this power station during the blackout, but I am quite confident it will serve us well now that we have it.
Our freezer just barely kept most if the food safe, but running it for an hour or two once or twice a day would certainly extend that safety margin considerably, and the power station could probably handle that for a day or two and still provide adequate cell phone charging and enough time on the CPAP machine to keep me safe for a few nights.
The unit itself was well-packaged. The instructions are clear, and the app fairly simple and useful. The unit itself is not visibly intrusive, it’s quite compact and seems very well made.
These days we are almost shamefully dependent on our electric and electronic devices, which are getting very energy efficient. Also this dependency is much more pronounced as we live longer.
All in all a great purchase, which I hope never to actually need to use, but I am very sure we will need it sooner or later.
Second update: About 14 months after the terrible power outage last year I bought a second Delta 2. The first one has performed perfectly, particularly during a fairly lengthy power outage a couple of months ago.
I have been considering how to increase my reserve capacity: Should I get an auxiliary battery or a second power station?
The price is about the same, but having 2 complete units seems to be more flexible. I had an opportunity to get a second Delta 2 for about ⅓ off the regular price, so that became my choice.
It’s so impressive how the power station pretty much sets itself up once plugged in, the app is opened on my phone and I touch h to the + button to add a new device.
This is now my third EcoFlow unit because I bought a River 2 just for my CPAP machine about 6 months ago, and it has kept me safe on quite a few occasions.
I feel very confident that we will be able to manage well during any future power interruptions.
L. –
I like the unit is not too heavy but the best features is the app so you can control it using your phone. It charge very quick using household outlet.