The only thing to make it better is more batteries. Extremely pleased! Just buy it! Thanks EarthTech for your great pricing and customer service!

I had never heard of this website/company, but they offered the best deal on the DPU. Shipping was really quick. I got my battery less than a week after ordering, and a day later, my inverter arrived. The tracking and updates were spot on. I even emailed them while my order was processing and they agreed to accommodate my request and ship me the upgrade for free.

Received inverter first, 2 weeks later received battery, no fault to Earthtech, Ecoflow flash sale put orders behind but so far seams to work great! Very happy with product. Top Quality!

recently received and am 100% pleased with the look and performance. Have not used it as a backup yet but am sure it will do the job.

After owning several Delta Pros, which I liked but found their 1600-watt inverter limiting for daily usage, I purchased the Delta Ultra. This new model is a serious upgrade over the Delta Pro. It's impressively quiet, and its two batteries exceed the capacity of three Delta Pros. However, be warned that this unit is heavy! Even though I work out regularly and lift weights, I can confidently say the average person will have trouble moving it alone. One important thing to note is that the inverter on this unit uses about 35 watts per hour just being on. While that doesn’t sound like much, over 24 hours, it accounts for about 14% of one of the Delta Ultra batteries. On the bright side, one of the best features is its ability to generate graphs showing power generated and outputted, which is very useful. I highly recommend this product. If you're coming from a Delta Pro, you will be pleasantly surprised by how silent it is.

The Ecoflow system expansion battery presented no communicates problems with the base which is important, not the same with the Anker model that I order which did show serious problems communicating with its base. The Ecoflow Pro powers up our home with ac/heating system without trouble, just needs more battery so it can last longer than 24 hours. The Ecoflow Delta Pro Ultra PowerStation has no problems working up to this time that I can observe, excellent.