SW Hoskins.—October 9, 2025
This is the updated device that is a newer generation of the vaunted EcoFlow Delta Pro. With the old style Delta Pro series, you had to use two of them with a connection hub in order to provide 240 volt output. With the improved Delta Pro 3, it will do 240V right out of the box. It has the RV supply plug in on the front and that works great. I actually jse that plug to connect ti my generator transfer switch. I have a shed that is totally supported with solar. I simply added the generator transfer switch and a small breaker box and this DP3 runs the whole shed. That is the lights, outlet where I charge my electric zero turn mower, outlets where I charge my power tool batteries, and we even run a mini split heater/AC, all with solar and no grid connection. This beast of a solar generator has the power to do it all. One feature I really like is the covers over the various outlets and inlets that all slide back into a slot, out of the way when you are using them. You get done, it slides back out and covers them back up to keep them dust and dirt free. Very wise for whomever thought of that! The 400 Watt portable solar panels are pretty nifty as well. Definitely well built with its own protective cover that zips closed for storage. Easy to use, but they are hefty, weighing in at nearly 50 pounds. Overall, I am extremely pleased with my EcoFlow Delta Pro 3 and 400 Watt portable solar panels. If I could give more than 5 stars, I would! Read more
Kindle Customer—July 19, 2024
The echoflow Delta Pro 3 is a well engineered and attractive product that allows you to have 120/240 volt AC split phase power from lithium batteries. Anker makes a good competitive product that sells in the same price range as the Echoflow Delta Pro 3. Before you buy the Echoflow you do a product search by looking at the available selection of Lithium battery devices on Amazon. Then you should look at YouTube to see people's comments on those products. You also need to be aware of the advantages and disadvantages of using Lithium batteries as opposed to other types of batteries. That is quite a bit of research work that you should do if you want to get the best product for your needs. I chose the Ecoflow because it is an established manufacturer, has a good track record, and has the specific features that I need. 1) I have a couple of gas generators that provide adequate power but they use an alarming amount of gasoline. I can quickly recharge my Echoflow using the (provided) 120 volt AC power cord that plugs into the Echoflow. The 7000 watt generator handles that load with ease and can simultaneously run the rest of the house's power needs. I can run the gas generator for a couple of hours per day and fully recharge the Echoflow. Running the generator for this limited time period is really quite fuel efficient. 2) The Echoflow has a 30amp self locking outlet which is the same as on my gas generator. I remove the power cord from the gas generator and plug it into the Echoflow and am able to operate the house using the Echoflow for the remainder of the day. I can even run my 240VAC well pump! 3) I can extend the runtime of the Echoflow by plugging in a few portable solar panels. more runtime in the future I can double my battery storage by buying another battery pack. If I want to double my maximum wattage I can buy another Delta Pro 3 and use a cross connect kit so I wind up with needing a 50 amp plug & cable rather than a 30 amp cable. A recent one day power outage showed me that this whole system works quite well and I don't expect that I will need to buy an additional battery or an additional Delta Pro 3 unit. Finally, I should mention a few problems: 1) The on-line user manual needs to provide much more detail about the unit. 2) The various plugs and switches need to be labeled right there on the machine. 3) Right below the AC power input cord there is a slide switch. As you face the rear of the unit moving the switch to the left causes the AC outlet to charge at its maximum rate of about 1800 watts. This is great if you have a 20 amp 120 volt outlet. If you are plugging into a small generator or a 15amp house outlet you need to slide the switch to the right (in the manual this is called the "adjust" position.) You also need to use the cell phone app so you can adjust the maximum charge rate. 4) The cell phone app is exceedingly useful and you should not buy this Echoflow unit unless you are willing to download the app to your cell phone. 5) Lithium-ion battery devices all suffer from have a quite limited temperature operating range. The ideal operating temperature is between about 40 degrees F. and 88 degrees F. The unit should never be exposed to less than 30 degrees F. or more than 115 degrees F. 6) The manual cautions you to never allow the unit to get wet. All that being said, I found that the Delta Pro 3 is an excellent match for my needs. Read more
Phoenix Down—July 13, 2024
The other reviews already went into a great deal of details into what's new with the Delta Pro 3, so I won't rehash them. It makes for a great portable power station, and improves upon its predecessor, the Delta Pro (which I also own). The improvements include, but not limited to: - Higher output and capacity: 4000W and 4000Wh vs 3600W and 3600Wh in the Delta Pro. - Sleeker silver exterior design. - The Extra Batteries can now stack directly on top of the DP3. - Significantly beefier solar charging capabilities: 2600W from 2 ports (30-150V/15A, 1600W Max. 11-60V/20A, 1000W Max.). This compares to Delta Pro's single port (11-150V/15A), 1600W Max. - It is much quieter - the cooling system has been significantly improved, and is now MUCH quieter. Most of the time, I can't even hear it. - It can now do 240V output from a single DP3 unit. This is in contrast with the Delta Pro, which required two units AND a Double Voltage Hub accessory for 240V output. - It now has neutral-ground bonding feature built in and can be toggled in the app, where as this capability required an extra accessory with Delta Pro. It's the last two points I want to expand on. Delta Pro owners will know that to charge their EVs, they needed a grounding adapter. This is because most EV chargers check for a neutral-ground bond and won’t function without it (e.g. the Tesla Universal Mobile Charger). This actually doesn't apply to just EV chargers, many devices and RV electrical systems checks for neutral-ground bond as well. The downside of using the EcoFlow grounding adapter is that you have to connect a bunch of extra wires and dongle. And using a non-EF grounding adapter with a single DP has the danger of frying the DP if you forgot to remove the adapter before charging (EF adapter disables charging when connected). One of the really cool things is that the NG bonding feature is now built into Delta Pro 3. You can now toggle this directly in the app, which also explains that AC charging is disabled while using this feature. I tested two methods of charging: 1. 240V charging using a L14-30 (front outlet) to 14-50 adapter, and the Tesla UMC. 2. 120V charging using a special TT-30 (side outlet) to 14-50 EV charging adapter, and the Tesla UMC. At 240V, you can see that I was able to hit the max output of 4000W. I held it at this rate for 30 minutes. The DP3 didn’t even break a sweat. At 120V, I was able to max out the Tesla UMC at 32A. This is technically beyond the TT-30’s max rated current output of 30A, but the DP3 handled it like champ. I ran the battery down to empty this time. Do note that the output current here is much higher than at 240V EV charging (32A vs 17A), which generates a lot more heat. So after discharging in my hot garage, the DP3 needed to cool down for about 45 minutes before it’s able to start recharging. Whereas after the 240V EV charging test, I was able to start recharging the DP3 right away. Not a big deal, just something to be aware of. Read more
