EcoFlow DELTA Pro Ultra X review
EcoFlow DELTA Pro Ultra X Home Backup System (12,288Wh)
By Tom Calder
EcoFlow's biggest home system: one inverter and two 6,144 Wh batteries for 12,288 Wh, with 12,000 W at 120V and 240V and surges up to 45 kW, which EcoFlow says handles a 5-ton central air conditioner. Appliances can plug straight in, or the whole house runs through EcoFlow's Smart Home Panel 3 or Smart Gateway, installed by a licensed electrician.
- Best for
- The most power: 12 kW at 120V and 240V
- Skip it if
- You only need the fridge, Wi-Fi and lights for a day or two
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- 12,000 W at 120V and 240V from one unit
- Grows to 180 kWh with three inverters (maker)
- 10 kW of solar input
Worth knowing
- Inverter 70 lb plus 111 lb per battery
- Far more than a fridge-and-furnace home needs
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Who shouldn't buy this
Don't buy it if you only need the fridge, Wi-Fi and lights for a day or two: a 3.5 to 5 kWh system does that.
Key specs
| Battery (as sold) | 12,288 Wh |
| AC output | 12,000 W |
| 240V | Yes, from one unit |
| Expands to (maker) | Up to 10 batteries (61 kWh) per inverter; 180 kWh with three (EcoFlow) |
| Warranty | 5 years |
| Runs (our estimate) | Fridge 4.2–8.9 days; fridge + furnace fan 14–19 h; well pump 9.3–12 h running |
| Connecting to the house | Plugs in on its own; for house circuits, Smart Home Panel 3 or Smart Gateway, installed by an EcoFlow-authorized licensed electrician |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for The whole-house kit: battery and 32-circuit panel together
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for A 5 kWh, 240V start with its own 10-circuit panel
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Best for Whole-home backup that starts big motors
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