ZDNET's key takeaways The EcoFlow Delta Pro 3 battery generator is available now for $3,699
The Delta Pro 3 has a capacity of 4 kWh, can be used with other units for up to 12 kW output, and features wheels for easy transport
The DP3 is very heavy, a factor buyers should consider if they plan to load it in and out of vehicles $2,699 at Amazon
The EcoFlow Delta Pro 3 power station is available for $2,684, the lowest price we've ever seen. EcoFlow also has a huge deal on an EcoFlow Delta Pro 3, a 400W portable solar panel, and a transfer switch bundle for only $3,199, a $2,098 discount.
My home experiences multiple power outages in a year. Luckily, I'm somewhat used to them since I grew up in a developing country where power loss was a near-daily occurrence. I've already had a couple of outages in the first half of 2025, each caused by extreme weather and falling trees.
Also: EcoFlow's new backyard solar energy system starts at $599 - no installation crews or permits needed
These power issues have made me rely on a good backup system like the Delta Pro Ultra and Smart Home Panel 2. However, even controlling every individual circuit and using the bare minimum, a single Delta Pro Ultra can only go so far. With careful management, it's lasted between 24 and 36 hours in our almost 3,000-square-foot home. While this isn't bad, running out to find somewhere to charge the DPU is a hassle. Last time, we opted for an EV charger at a library. Thankfully, the Delta Pro 3 has excelled as an expansion to our home backup system.
While the DP3 is an entire backup battery capable of keeping a refrigerator running for up to three days, I've had a chance to actually test it in several real-world power outages to see if it could work as a backup to our backup.
What happened to knock out the power? A nearby tree fell on some power lines earlier this month, causing outages in our area, so my husband and I went into full-on crisis mode. While the EcoFlow Delta Pro Ultra knows when severe weather is coming and fully charges itself beforehand, this tree gave in to gravity a day after a storm, so the DPU battery was at 82% when the power went out.
Given that our home appears to consume power by simply existing, I began shutting down low-priority circuits on the Smart Home Panel 2 using the EcoFlow app. Thanks to our switch to Google Fiber, we kept the ONT and router running so we could keep our internet access on and not miss out on work.
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