I bought the Delta 2 primarily as a backup power source for my refrigerator during any short power outages this winter. I can also use it as a backup power supply for my home office or a small freezer if needed. As a test, I hooked up a laptop with additional 21" and 32" monitors while working today. I also periodically ran a 15-watt lamp, a second desktop computer, and charged some devices. The Delta 2 provided exactly 10 hours of power. According to the Kill-A-Watt P3 power meter it was approximately 780 watt hours out of the listed 1024 for an overall efficiency of 76.2%. To be honest I was hoping for more, but I do plan on picking up the extra battery. However, the basic amount should be enough to get the refrigerator and maybe a small chest freezer through the night during a short power outage. For solar charging I picked up two 160-watt EcoFlow panels. I set the two panels up on my back porch and tracked the sun from mid-morning to mid-afternoon. The two panels generated a maximum of 250 watts of input with clear skies but noticeable wildfire smoke. I was able to bring the battery up from 30% to 80% before the trees blocked out the sun. Solar panel efficiency dropped off quickly with any shading. I experimented with parallel and series wiring as shown in the manual. I found I got a little more wattage out of the series method. When I looked at the specs I think that was because in parallel I was exceeding the 15 watt maximum input and it was throttled down by the control system. Adding a third panel would max out the system on volts and watts, and it might be worth considering for winter charging with fewer hours of less intense sunlight. These three panels could only be hooked up in series. AC charging was fast! I actually tempered the charging to 800 watts maximum instead of the standard 1200 watts to reduce the amperage, but even with input reduced by one third a full charge from 0% to 100% took less than 2 hours. The fan runs the entire time the unit is charging. It is noticeable but not loud. Overall I feel this is a great item to have on standby for short power outages. It can power small appliances and a computer for a significant amount of time when needed. Set up is fast and easy. The 160-watt solar panels are fairly lightweight and appear to be more durable than glass panels. The manual should do a better job of explaining the differences between parallel and series options (that might be a good feature for the app). The Delta 2 is manageable in size and weight and would even fit in an RV for mobile power needs.

We have been looking for a portable solar battery for tailgating and backyard football/movie watching. Watched and read many reviews and was excited when the Delta 2 came out and immediately purchased it. We already have 2-160w EcoFlow solar panels which we plan to use with the Delta 2. My only complaint is that although it can accept 500w charging, the 60 amp voltage limits it to 2 panels. Other than that, it is excellent and highly recommended.

Bought the Delta 2 and the Delta 2nd battery to use as emergency back up for the house... enough to keep the Fridge and a few necessities running... also have two of the 220w solar panels to keep it charged... the fast recharge time is a great feature... in testing the batteries will keep things running for just under 24 hours.

We bought this before a big snow storm. We were going to lose power. Having to lose a fridge and freezer worth of food was not an option for us. Having the eco flow as a back up power source that was safe and not run on gas was a game changer! I now have peace of mind when we lose power. Great for charging the phones and computer for work and entertainment. So happy we made the decision to finally purchase this. I’m excited to take this camping with us this summer!

Purchased this Delta 2 about a week ago and have had a few days to play around with it. Really nice so far. Got it as a gift for my mom for power outages. It was able to power her full size refrigerator overnight. I plan on using solar panels to recharge but haven't had a chance to test yet. From what I've seen on other reviews it doesn't seem we'll have a problem.

Hi, EcoFlow! I've already mentioned to your support, that your products are amazing. Be a Ukrainian and do not know the brand - it's a shame (: I bought Delta2 and Extra Battery 3 months ago and these guys help every day to survive the power outage and stay online, with heat and light. Really convenient to use. Look and feel are great. Efficiency is the top.

I bought the Delta 2 and it was one of the best decisions I have made. It charges super fast, about an hour, which is really important to me. It has outlet connections, usb and usbc, which is handy when plugging a variety of things in. The Delta 2 has come in handy when the power went out and we were able to use it to run our refrigerator and a couple of other necessary items. The lifting handles come in handy when moving it around. Additionally, another thing I like is I can keep it stored inside the house and handy in case of emergency when not in use and there is no gas involved with the gas generators. The fact that it is portable is a huge plus. I can’t wait to take this with me next time we go camping!

I live in the mountains and regularly have power outages that last from hours to several days (longest was a week) and am often isolated due to downed trees or snow. I bought the EcoFlow Delta2 to help power some basic things like kettles to have hot water (tea, soup, oatmeal) and recharge my phone or power wifi. I have only used it once so far, but it worked great. The length of the life of the charge is determined by the amount of power that the appliance needs (obviously). But it would allow a small heater to run a few hours and the kettle barely used any energy at all. It charged very quickly. I bought this one as I wanted something that I could move by myself easily, and I wasn't sure I could do that with the larger options. I haven't used the solar panels yet, but am excited to try them. Overall, I am delighted and just have a more peace of mind having it.

We just installed a new propane fireplace in our off-grid cabin and having the Delta 2 was an important part of the decision. The 40kBTU unit has a 180CFM fan and is rated at 120 Volts, 1.8 Amps, 60 Hz (205 watts). While I'm happy with the power and profile of the Delta 2, the solar panels are cumbersome to set up compared to my other-brand solar generator (no clipping into position or separate carrying case needed). The ability to add an extra battery, however, is a serious plus for this application.

I got the EcoFlow DELTA 2 plus Extra Battery (1024kWh) primarily as a backup for critical home appliances (e.g., refrigerator, freezer, possibly furnace) in case of power failure. I had joined the Facebook group EcoFlow DELTA Series Official Group to learn as much as possible from current users. I’ve found this group great for providing information, especially when it comes from EcoFlow technical staff. There’s no doubt the DELTA 2 would serve its intended home purpose, but due to its relatively light weight and reasonable size I’m now considering its use during camping trips to power an induction stove, water kettle, Instant Pot, electric blanket, and electric heater. I’ve experimented at home and these all work great, though use a significant fraction of the available capacity, even including the Extra Battery. I’ve acquired a couple of 200-watt solar panels to replenish the power used, and will determine soon if this is a viable approach. The ability to very quickly charge when AC power is available is great, as is quick solar panel charging given sufficient panel power. Biggest drawback is that the DC5521 12V outputs are limited to 3A as my camping system is designed around having a 12V battery with at least ten times that amperage. Oh, and that cable connecting the Extra Battery needs 90 degree connectors so the cable doesn’t stick out 7”.