★★★★☆
Price
$599
Best for
Budget-friendly backup for short-to-medium outages

The EcoFlow Delta 3 Plus sits at the other end of the lineup from the Anker above — it’s the “I want real backup without a five-figure solar setup” option, and it’s the one that shows up most often in budget-focused 2026 buying guides.

Same disclosure as our other reviews: this is written from EcoFlow’s published specs and manual plus verified owner feedback, not our own hands-on testing.

Why it’s worth considering: 1,024Wh of capacity and a 2,400W output is enough to run a fridge, a modem/router, some lighting, and charge devices through a several-hour outage — the scenario most people actually deal with, rather than a week-long grid failure. EcoFlow’s spec sheet lists a roughly 10ms UPS switchover, which matters if you want it to catch a desktop computer or medical equipment the instant the power blinks.

Setup: at a fraction of the Anker’s weight, this is the pick for anyone who wants to plug it in, keep it in a closet, and not think about it until they need it. It’s expandable to roughly 5kWh with extra battery packs if your needs grow, which is a reasonable middle path if you’re not ready to commit to whole-home backup pricing.

Running cost: the main ongoing cost is electricity for recharging and the slow, expected battery degradation every lithium pack has — nothing unusual here compared to other lithium power stations in this price range.

Pros

  • Strong capacity-to-price ratio at this end of the market
  • Fast ~10ms UPS switchover — good for electronics that hate power blips
  • Expandable to ~5kWh with add-on batteries
  • Light enough to store in a closet and forget about

Cons

  • Not sized for multi-day whole-home backup
  • Fewer included accessories than pricier competitors
  • Output (2,400W) won't start some high-draw appliances

Specs

Capacity1,024Wh (expandable to ~5kWh)
Continuous output2,400W
UPS switchover~10ms
WeightPortable — designed to be moved indoors easily

Verdict

The sensible pick if your real-world problem is “the power goes out for a few hours a few times a year” rather than “I need to run my whole house off-grid for a week.”