EF ECOFLOW DELTA Pro Extra Battery 3600Wh, 2.7H to Full Charge, Battery Backup for Home Use, Blackout, Camping, RV

Excellent portable power solution for camping, emergencies, or on-site work. Battery management is solid, with decent recharging options and a responsive display. It’s a bit heavy, but that’s expected for the capacity. Overall, a dependable, versatile unit.

This is our second ECOFLOW product we've owned. Our first was a Delta 2. It served us well, but ultimately it was too small. That's where this one comes into play. We chose this unit because of it's storage capacity, power output, ease of attachment with accessories and ECOFLOW's reputation. We could have gone a different route, such as a different brand or simply building my own solution, but ultimately this was the better solution for us. ECOFLOW is the solution to go with if you need a solution that works out of the box. We'll be using this unit with our 1400 W of solar panels we've assembled plus the Alternator Charger we bought to work with the previous unit. ECOFLOW has a good reputation regarding quality. Our previous unit never had any issues and I don't anticipate this one having any issues. One word of note - It's heavy. It rolls on built-in wheels and has a built-in handle to help get it around.

I’m very impressed with the EcoFlow DELTA 3 portable power station. It delivers fast charging, reliable performance, and plenty of power for a variety of needs — whether it’s for home backup, outdoor adventures, or emergency situations. With its high-capacity battery and strong 1800 W output (3600 W surge), it can run most household appliances and electronics without trouble.  One of the standout features is how quickly it charges using multiple input options — AC, solar, or car — giving flexibility no matter where you are.  The unit also includes multiple output ports, so you can power several devices at once, from phones and laptops to refrigerators and fans.  The build quality feels solid, and the battery uses durable LiFePO₄ cells designed for long life, meaning this power station should stay dependable for years.  Overall, it’s a well-rounded and powerful portable energy solution that I’d definitely recommend for anyone needing reliable off-grid or backup power.

I absolutely love these EcoFlow units. This Delta Pro Extra Battery is no exception. I own several EcoFlow products, and they’ve consistently been at the top of my list compared to other brands I’ve tried. This extra battery connects to the Delta Pro easily. It is heavy, so you may want someone to help you move it, but the wheels make rolling it into place simple. It comes with a very solid, thick connection cable that attaches securely to the Delta Pro. The extra battery has given me a huge boost in runtime. We use our Delta Pro as part of a backup system with a transfer switch, and adding this battery has made everything work even better—especially during outages and peak-hour usage. We already have solar on the house, so pairing that with EcoFlow has actually helped us reverse our electric bill. Pretty amazing. One of my favorite things about EcoFlow is their app. It’s smart, reliable, and shows exactly how long you have left on your battery, how long it will take to charge, and the wattage each device is pulling. I also love that you can use third-party smart plugs in the EcoFlow app; I use Tapo plugs and they work great. You can set timers and manage everything right from your phone. Charging flexibility is another big win. Whether I plug it into a standard outlet or charge it through solar, it’s quick and efficient. I personally charge mine at a lower wattage, but it’s capable of charging much faster if needed. EcoFlow always has great deals, excellent customer support, and a dependable honor system. This extra battery was a must-have add-on for my home setup, and I’m thrilled with how much more power and freedom it gives me. A fantastic upgrade.

Top quality unit built great

I like this seems to work really well. I like that. It has the Bluetooth connection to your phone and it’s super easy to charge. I have not used the solar panels yet but I like that they are there in case I need them. I did plug in a 1500 W heater and the time it said it would run it but it’s two hours that was a bit surprising to me I thought it would last longer than that but sure it’s just a factor of the size of the battery. It’s a bit heavy, but that also expected based on the size of the battery. The handle to move it around is at the very bottom and while it’s in a great position when you are rolling it it’s a little hard to get to and get out other than that. I have no complaints about this machine. I really like it.

The EcoFlow DELTA Pro delivers serious, dependable power whether you’re off grid with the RV or dealing with a home outage. With 3600Wh and multiple 120V outlets, it easily handles heavy-draw devices that most portable units struggle with. The fast 2.7-hour recharge is a lifesaver—you can top it off quickly before a trip or during short power windows at home. For RV boondocking, it runs essentials without breaking a sweat and gives you true flexibility without firing up a generator. At home, it’s strong enough to keep critical appliances running when the power goes out. The LiFePO4 battery chemistry means long life, safety, and stable performance. Solid build, plenty of power, and zero hassle. A serious upgrade if you need reliable off-grid capability and emergency backup in one unit.

Fonctionne très bien jusqu’à maintenant. Utile à mon camp pour faire fonctionner mon réfrigérateur et mes équipements 12V et 110v. Avec mes panneaux solaires, la recharge est essez rapide, soit 80% en 7-8 heures de plein soleil en gardant la bonne orientation des panneaux. Seul, le poids du Delta Pro est agacant à 99 lbs

Je n'ai pas reçu le panneau solaire qui devait accompagner la commande

Hi im lin in Vancouver bc canada, i bought 7.2kwh ecoflow delta-pro early this year and ecoflow 800w alternator charger late last year. From April 2025, i ve used them in my camper van and they have brought great convenience to my camper van life. Late august, the solar panels charging was out of order for my delta-pro( maybe due to my removal of damaged in-line 15A fuse for the solar panels), after contacting the service team of eco-flow, they let me replace a brand new main battery of the eco-flow for free. From yesterday, i added a new 15A in-line fuse to my solar panels and the delta-pro has worked normally from yesterday. I appreciate a lot to the service team of eco-flow for their kind snd professional helps for my solar charging fault. Btw, if eco-flow can provide ev-charging station adapter by connecting from the back of the delta-pro battery back , that is better. Currently the adapter for ev-charger connects through front side port which is hard for charging for its location is in facing forward and blocked by the van side. I think most camper van users have the same setup as me. Regards Lin

I ordered the stick of flow that comes with the portable 400 W solar panel when I arrived home and my delivery was supposed to be on the front porch and it wasn’t there. I think it got stolen. I wrote right away to customer support and they Send me a replacement without any hassle having great customer support especially an expensive item like those is great. I strongly recommend doing business with them. As the Ecoflow itself I am very satisfied, even though It is a pricey, eat them when you’re strongly needs it. It won’t let you down. It is very easy to use, and it has a lot of intuitive features. We use it as a generator to renovate our house. It powered everything we threw at it without the problem. I think in the near future, I will purchase a second one with the adaptor of to get 220 V and power the whole house in the event of our power outage I really love this product and I strongly recommend

Excellent quality generator (it’s a large rechargeable battery), and the best flexible solar panels I’ve seen yet. I required a couple of sturdy sticks to hold up the outside panels properly. It’s unfortunate the generator lacks an additional input port for another 400w panel. You can hook additional but they must be hooked into panels that are already plugged into generator. The 4x 100w (400w) panels are connected in series, meaning if one panel (100w) is shaded, it significantly reduces the output for another connected 100w panels. This is ok, just have to ensure you move them around. It’s a good purchase.