Description
- Made for the Outdoor. Replace your outdoor generator with a solar generator. Includes a 220W Bifacial solar panel to capture up to 25% more energy. Charge your DELTA 2 even faster with green 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 year warranty.
- *DELTA 2 and 220W Portable Solar Panel will be shipped separately.
Jeffrey E. Norris –
(If you’re looking for a technical review, I’m sorry, but this isn’t it)
UPDATE: Without going through the multiple headaches I had with getting an EcoFlow Delta 2 (because of FedEx, not EcoFlow), I did receive a device to replace the one that was damaged during shipping, and the power station appears to be just as good as I had hoped, although I’ve yet to put it through much testing.
The (fast) charging time from the wall (ac) on these devices is almost unbelievable, and I did test that. The Delta 2 looks good, seems to be built very sturdily, and I like the fact that it can also be controlled with the app. Even if you’re out in the middle of nowhere, with no Internet access, you can still connect directly to the unit. Obviously, not a necessity, but a very good feature.
I’m an old man now, but my education was in ‘Industrial Electronics’ all those years (decades) ago, and I still keep up with technology a bit, and if I could write out a wish list for a solar power station I couldn’t improve on some of the devices that EcoFlow is currently producing. At least not while also keeping it affordable. We all have different ‘preferences,’ and no devices are perfect, but overall, I think EcoFlow is killing it. I also love that the Delta 2 has a LiFePo4 chemistry battery. This thing may outlive me.
When I received the Delta 2 replacement unit it was charged to 31% capacity. I charged it to 85%, and plugged in a few devices just to see if it appeared to be working correctly, and it did. I didn’t think to watch the time, but it charged from 31% to 85% in probably just about 35-40 minutes, or so. My electric razor charges MUCH more slowly than that.
My initial plan was to totally discharge the unit, fully charge it to 100%, and then discharge it back to about 85% and have it ready for an emergency. I just wanted the cells to go through a complete discharge/charge cycle.
However, nature had a different plan…..
Strangely, after having a terrible (mostly very strong winds 70-90 mph) storm here just a month prior, and being without power for 3.5 days that time, almost one month to the day we had an EF-1 tornado come through on April 5, 2023, and I was without power for almost exactly one full day. I did have some backup power, but not what I wanted, or even what I really needed for the 3.5 days without power.
Also, almost to the day, on April 3-4, 1974, in a 24 hour period, we had the ‘1974 Super Outbreak’ (148 confirmed tornadoes, in 13 states, and Ontario, Canada). There were 319 fatalities, and 5,484 injuries. At one point as many as 15 tornadoes were occurring simultaneously. It was the most violent tornado outbreak ever recorded. Wikipedia has an interesting page about it.
I was 13 at the time, and my friend and I were standing outside, talking about how things weren’t looking so good, as tree limbs, various debris and parts of roofs were flying around. *lol* Then, it got completely quiet, eerily quiet. I mean not a sound from anywhere quiet. There was no wind, not even a breeze. The completely black clouds looked to be so low I could almost touch them. IT WAS WEIRD! I had never experienced anything like it before, and haven’t experienced anything like it since, and I’m “middle aged,” as long as I live to be 126. *lol*
We couldn’t have known it at the time, but an F4/5 tornado would come through minutes later about 1 mile from where we were standing. We went to a nearby local park several days later, and there were massive trees, hundreds of years old, pulled completely out of the ground, giant root balls and all. It was surreal. Almost like a movie set, or something.
Another friend’s mother saw us standing outside, and by then it had gone from completely quiet to completely crazy again. She started yelling at us and waving her arms, so we headed to her house. I remember the wind being so strong the last 100 feet or so, that I thought I’d have to get on the ground and crawl. I was probably leaning at literally a 45 degree angle, and it took everything I had to make any net gain. I’d go forward a bit, and then get blown backwards. That was the point that I finally figured out that I was was probably going to die.
To top it off, my friend and I had went outside in the first place to smoke a joint, and we were really high, and I kept thinking about Dorothy in ‘The Wizard of Oz,’ and got freaked-out even more. Yeah, I wasn’t a great kid there for a while, but it was the 70’s, and I tuned out okay. Plus, I was right in the middle of the ‘1974 Super Outbreak,’ and lived to tell this story. So there!
Since the weather was somewhat mild after the power went out this last time, I didn’t have to worry about heating or cooling, and the Delta 2 isn’t meant to power a furnace or AC units, anyway, so I used it for just powering my computer and a single LED light. The bare minimum, but I live alone, and it was all I needed. The Internet was also out, so I used my phone 5G Internet connection and ‘HotSpot’ for Internet access for my computer, so there was no need to even power my modem or router. I charged my phone from my computer, of course.
Also, from the ‘Outage Map’ online it appeared the power wouldn’t be out anywhere nearly as long as it had been in March, just from the number of people without power, and in March there were some 800 utility poles down, too, so I wasn’t even worried about powering my refrigerator/freezer, or any other devices, but the Delta 2 could have done it. It wouldn’t power all of them simultaneously for a full day, of course, and not even a full-sized refrigerator/freezer alone for a full day, but it has some capacity. 1024Wh, to be exact. With an extra battery you can either double or triple the capacity, depending on which battery you get.
A Delta 2 should get most people through most power outages fine, as long as they’re not expecting too much from it. Keep phones charged, keep a light on, maybe run a computer, use a microwave ‘very’ sparingly if you must, and if it’s really hot, maybe run your refrigerator/freezer intermittently if the power has been off for several hours.
My situation wasn’t really much of a good practical test for the Delta 2, as it was a very light load, but the device had an 85% charge when I started using it after the power went out, and it was still at 30% when the power came back on about 24 hours later, and I was watching videos on my notebook computer most of that time. Also, when I slept for maybe 5 or 6 hours, my notebook was still on, but I did close it so the screen was off, so there was at least some load on the Delta 2 the entire time, although it wasn’t much.
We have very few power outages here, and when we do they’re usually shorter in duration – maybe just 2 – 3 hours, on average – although some are a bit longer. During a “typical” outage, and even with a much greater load on it, this EcoFlow Delta 2 will be great to have, and should do everything I *need,* and then some. I will be adding an extra battery however, just in case we have more events like we had here in March, and from the way things have been going, it looks like it’ll be a matter of ‘when’, not ‘if.’ This world has been really strange the last few years.
Keep in mind, things change quickly if you’re talking about powering an electric heater, and/or other devices that use a lot of power, and especially if you want to power them for many hours, but most people probably know that. These devices are basically just a battery and an inverter, not perpetual energy machines. If you know you need a LOT of power, you probably want a different device, perhaps even a Delta Pro, or possibly even 2 Pros connected together for 240 volts, and a ‘Smart Panel’ to connect them into your existing home breaker panel. If you’re wanting to power many/most of the electrical devices in your home, that is.
From what I’ve seen so far I can highly recommend the EcoFlow Delta 2, and EcoFlow’s customer service was fantastic. As good as I’ve ever experienced, and better than most. We had to communicate numerous times, and it never took them long at all to respond.
When I sent them notification that the first unit had been damaged during shipping, the reply was so quick that I thought it was going to be an automated response, but nope, it was actually from a real live person, or ChatGPT Artificial Intelligence, I’ll never know. *lol* They/it did ask for photos of the damaged device, which was understandable, they then immediately offered me a FULL REFUND, or a replacement unit. I obviously opted for a replacement, and they quickly emailed me a shipping label to return the damaged unit, and even with FedEx screwing things up (again), the damaged unit was received in California, and they got a replacement device sent out very quickly.
Things happen, especially since FedEx seems to have a – ‘Package Destruction Department,’ that most of my packages seem to go through, but it’s how they’re handled that matters to me, and EcoFlow couldn’t have handled the situation any better. I’ll feel even better about ordering more of their equipment in the future. Which I will be doing.
Instead of having many thousands of dollars invested in a higher capacity device, I wanted to get my hands on a lower-priced unit first, just to check the quality firsthand, and so far EcoFlow has passed with flying colors. I will need to test it with heavier loads, however, before I buy a more expensive model. As a bonus, I even got to give EcoFlow’s Customer Service a try, thanks to FedEx.
The way it looks, I’ll eventually be adding a single ‘Delta Pro,’ (with at least 1 extra battery), and an EcoFlow (Dual Fuel) ‘Smart Generator,’ as I want to be prepared for almost anything, and be able to help others in a very bad, longterm situation, should it occur. That setup should get me through almost anything I’m likely to encounter, and give me the capacity to power anything I’d need, and almost anything I could reasonably want to power, and I’ll have the Delta 2 as backup/portable power. I also like the fact that the Smart Generator can be run on propane, which can be stored for extremely long periods, basically indefinitely, unlike gasoline.
I’ve only got 400 watts of solar panels right now, but that will soon be increased to 800 watts, and 800 watts coupled with a Delta Pro, extra battery and a Smart Generator, is a serious amount of power……and, unfortunately, money, too.
After society collapses, which should be any day now, I may actually have electricity until I starve to death. That’s as long as they don’t block the sunlight out, too. Which I hear they’re currently working on, ’cause ***CLIMATE CHANGE!!!*** *lol*
******
Device was damaged in shipping. Waiting on a replacement device. EcoFlow has been great. Extremely quick response, etc. Will update review after a new Delta 2 unit is received.
Gregory H. –
Je l’ai utilisé pour charger nos cellulaires et autres appareils électroniques pendant 2 semaines de camping sans services. Très utile surtout si le ciel est couvert ou pluvieux (recharge solaire) et que vous ne pouvez pas recharger votre batterie rapidement. Pour une première expérience nous n’avons consommé que 50% des 1000watts disponibles. Cette batterie est légère et peu encombrante. Au retour elle s’est complètement rechargée en 37 minutes à la maison. Donc si vous avez un peu de patience vous pouvez la recharger ailleurs où une prise de courant est disponible…
Mark –
I purchased this for the Cottage, to operate my Starlink Internet, and TV, without leaving the Generator on all day!..It lasted for 10 hours, but recharged at 13 percent!..I have a Honda 3000 EU Generator, and very Happy with the charging time,…I did not run the tv for a full 10 hours though, but, for 8 hours…My wattage fluctuated between 50-75…Charging time took 1 hr, 10 minutes to 100 percent, so, Very Happy with this Device, as the fuel costs are a 1.80 per litre!..will take this back when I close up, and certainly will be useful here, as, we will still have power outages in the winter months, will be nice not to have to run extension cords everywhere, and leave doors opened or cracked!..also, tried it with various tools, like Heat Gun, skill saw, no problem!…I gave it a 5 star, because, it performed, like it very much, 5 year warranty, and supposedly good for around 3000 charges, very nice!…It’s Great!
Marie-Christine –
Produit utiliser pour alimenter un congélateur 12 volt et pour la recharge d’appareils tel qu’un Iphone, go-pro, lap-top.
La charge ce maintien bien, le guide d’instruction en français est facile à comprendre et la qualité est très robuste. Elle est assée légère à transporter et finallement elle convient très bien à ceux qui aimes avoir de l’énergie non polluante.
Dispendieuse, mais avec le nombre de recharge avant que la capacité de la batterie soit diminué à 80% vous avez 3000 recharge à faire. Donc elle sera probablement à 100% de sa capacité pendant au moin 10 ans à moins que vous la rechargiez à tous les jours et ce 365 jours par années.
Excellent produit
Art .. –
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.
Outdoor Enthusiast | Geek | Photographer –
I bought my unit from Amazon Canada where it’s regularly sold for 1,300 CAD. Mine, however, was sold as “Condition: New” for 1,039.00 (it’s why I purchased it). The unit arrived without a User Manual, and some discoloration on the top panel. Either a manufacturing defect, or a returned unit. The fact that my efficiency is at best 75% (see below) when reviewers easily got over 80% tells me my gut feeling is right.
The unit arrived at 30% charge. When I first tried to charge it to 100% (plugged into a 110V, 15A wall outlet), the unit would not go above ~600 watt input: a far cry from the promised 1200 watt input. This resolved itself after a full discharge. But it is not mentioned in the User Manual or in any online resource.
Ecoflow support is not very fast. I sent a detailed email to their support email. The first response was a request for more information without requesting any specific information (either not very competent, or to delay). I resent the email with the same information re-organized. After 3 days another person replied, asking for a video proof so they could send it to an engineer.
Through many tests with different appliances (small fridge, big fridge, freezer) I observed the following:
Efficiency is highest when you discharge quickly. This one puzzles me. I got 75% efficiency on my big fridge and freezer, discharging the unit completely in ~6 hours. I got ~65% efficiency on my small fridge that took about 12 hours to discharge. I can only assume that the onboard chip consumes enough power to make a difference. You’d expect a slow draw to be more efficient (better temp control). Looking online, Computer on Chip (CoC) wifi components can consume anywhere from 6 to 20 wh. Assuming 10 wh, that would almost bring me back to my 75% efficiency rating I got on ~6 hours of use. Unfortunately, it doesn’t seem like you can disable bluetooth or wifi. I hope this is a HW limitation and not some SW gap… Either way, not great.
When fully charged and plugged in, the delta 2 constantly drew 10 watts. Is this constant recharging? I’m assuming not. Is the CoC bypassing the battery when the unit is plugged in? Maybe. If so, that might explain the worse efficiency over longer periods of time: 10wh for the wireless components on the CoC. I can also confirm that it drew 10wh whether or not it was connected to a wifi network or a to bluetooth device (is the chip still searching for networks/signals even if you’re not connected?).
Bottom line: I decided to keep it. 200$ for a loss of 5-10% efficiency is acceptable. I hope it doesn’t mean it’s already got 1000+ charges, but what can ya do. I would certainly advise everyone to test their unit with an independent watt meter (the Delta 2 doesn’t have a meter anyways). I would not have kept it if I had paid full price.
Outdoor Enthusiast | Geek | Photographer –
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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.