EcoFlow DELTA Pro Ultra Review
The largest system on our list: 6 kWh per battery, 7,200 W of 120/240V power, and room to grow to 90 kWh. Built for homes that want to run more than the essentials.
The DELTA Pro Ultra is the station to buy if you want a battery that behaves like a home backup system, not a large gadget. It matches the Jackery Explorer 5000 Plus on output and adds about 1.1 kWh of storage, the highest solar input on our list, and by far the most expansion room. It also costs about twice as much, so it only makes sense if you will use that headroom.
Who it's for
Buy the DELTA Pro Ultra if you lose power for days at a time, run 240V loads such as a well pump, and plan to tie the system into your home panel. It also suits homes with rooftop or ground-mount solar where a big battery can soak up a full day of sun.
Skip it if your outages are short. For one-day outages, the Jackery Explorer 5000 Plus gives you the same 7,200 W for about half the price.
Key specs
| Spec | DELTA Pro Ultra |
|---|---|
| Battery capacity | 6,144 Wh per battery (LFP) |
| Expandable to | 90 kWh (multiple inverters and batteries) |
| Continuous AC output | 7,200 W |
| Voltage | 120V and 240V split phase |
| Solar input | Up to 5,600 W |
| Design | Separate inverter unit stacked on battery packs |
| Weight | About 44 lb inverter plus about 112 lb per battery |
| Home connection | EcoFlow Smart Home Panel 2 or a transfer switch |
| Warranty | 5 years |
What it can run
With one battery you get about 5,220 usable watt-hours after inverter losses.
hours ≈ 6,144 × 0.85 ÷ watts used
- Refrigerator, router and LED lights (about 220 W average): roughly 24 hours.
- Fridge, chest freezer, router, lights and a furnace fan (about 780 W average): roughly 6.7 hours.
- Well pump cycling on and off (about 400 W average): roughly 13 hours on its own.
Each extra battery adds another 6 kWh. Two batteries carry a fridge, internet and lights for about two days before any solar.
Pros and cons
What we like
- Most capacity per battery on our list
- 7,200 W of 120/240V output
- 5,600 W solar input refills fast on sunny days
- Expansion to 90 kWh covers multi-day outages
- Modular design splits the weight into parts
What to know
- Highest price on our list, about $1,025 per kWh at list
- Full home integration needs the Smart Home Panel 2 and an electrician
- Heavy even when split; plan a permanent spot
- Overkill if your outages last hours, not days
How it compares
| Model | Capacity | Output | 240V | List price | Per kWh |
|---|---|---|---|---|---|
| EcoFlow DELTA Pro Ultra | 6,144 Wh | 7,200 W | Yes | $6,299 | $1025 |
| Jackery Explorer 5000 Plus | 5,040 Wh | 7,200 W | Yes | $3,149 | $625 |
| EcoFlow DELTA Pro 3 | 4,096 Wh | 4,000 W | Yes | $3,699 | $903 |
| Anker SOLIX F3800 Plus | 3,840 Wh | 6,000 W | Yes | $2,799 | $729 |
On price per kWh the Jackery and Anker are far cheaper. The DELTA Pro Ultra earns its price through solar input and expansion: it is the only unit here that can grow into a whole-home battery bank. Sale prices have reached about $4,099, which narrows the gap.
Bottom line
If you want the biggest, most expandable portable system and you will wire it into your home, the DELTA Pro Ultra is the top choice. If you mainly want to get through a day-long outage, a 5 kWh station costs much less.
Specs and prices come from manufacturer listings and published reviews. We have not lab-tested these units. Prices change often, so check the current price before you buy.