EcoFlow has been one of those portable power station brands that has scored consistently high marks in our tests. They're an easy recommendation based on our reviews, offering everything from small off-grid units to full emergency home backup power supplies. Now, Prime Day might be over, but EcoFlow is still offering great deals on its own site in an extended sale that runs until October 18. Of all the backup options currently discounted, the one worth checking out first is the EcoFlow Delta 3 Ultra, a 3072Wh power station built for powering large appliances. • Best for: Homeowners preparing for power outages, people who need backup electricity for essential equipment, and anyone looking for a high-capacity portable power station.• The deal: The EcoFlow Delta 3 Ultra Portable Power Station is $1,349 (was $1,599) at EcoFlow.See the full sale at EcoFlowToday's best EcoFlow portable power station dealDelta 3 Ultra Portable Power Station: was $1599 now $1349This portable power station features 3072Wh LFP battery capacity, 3600W continuous output, 7200W surge power, 89-minute fast charging, 10ms automatic switching, quiet operation, smart app control, and home backup connectivity options.View DealWhy we recommend itThe EcoFlow Delta 3 Ultra has a 3,072Wh battery that offers enough stored energy to keep essential equipment running during shorter outages. It delivers 3,600W of continuous AC output, with a 7,200W surge rating to accommodate the brief startup demands of compatible appliances.EcoFlow's X-Boost technology can support certain appliances rated up to 4,600W by adjusting the supplied voltage. EcoFlow says the battery can reach 80% in just 89 minutes using a suitable AC or generator charging setup. Batteries are rated with a ten-year lifespan. Price context & historical valueEcoFlow has reduced the Delta 3 Ultra from $1,599 to $1,349 as part of its Prime Day Fall Extended Sale. That's a saving of $250, around 16% off the standard price. It's not the cheapest it's been however. It was on sale for $989 at Wellbots for Black Friday last year.Should you buy it?✅ Buy the Delta 3 Ultra if... You want a high-capacity battery backup for your home. The 3,600W output makes it suitable for a wider range of appliances than smaller portable power stations.❌ Skip the Delta 3 Ultra if... You only need to charge phones, tablets, or a laptop occasionally. A smaller, cheaper power station would be a better option.More EcoFlow dealsDelta 3 Max Series Portable Power Station: was $1199 now $899This portable power station offers 2048Wh capacity, 2400W output, 4800W surge power, 68-minute fast charging, lightweight design, LFP battery technology, 10ms automatic switching, quiet operation, and smart app control features.View DealDelta 3 Ultra Plus Portable Power Station: was $2199 now $1599The Ultra Plus features 3-11kWh expandable capacity, 3600W output, 7200W surge power, six charging methods, 48-minute fast charging, LFP batteries, smart output prioritization, 10ms automatic switching, and app-based controls.View DealDelta 3 Classic Portable Power Station and Solar Panel: was $899 now $699This bundle includes a 1024Wh portable power station and 220W solar panel, supporting 500W solar input and approximately 5.8-hour solar charging for convenient off-grid power.View Deal