Head to head
EcoFlow DELTA Pro Ultra vs Tesla Powerwall 3
EcoFlow · Power Station
EcoFlow DELTA Pro Ultra
~$4,999
7,200 W / 10,800 W surge · up to furnace blower, sump pump or a window AC
Tesla · Home Battery System
Tesla Powerwall 3
~$15,000
11,500 W · up to well pump or a small central AC
Quick takeThe EcoFlow DELTA Pro Ultra lists about $10,001 lower; the Tesla Powerwall 3 puts out more sustained power (11,500 W).
| Spec | EcoFlow DELTA Pro Ultra | Tesla Powerwall 3 |
|---|---|---|
| Approx. price | ~$4,999 | ~$15,000 |
| Type | Power Station | Home Battery System |
| Fuel | Battery (LiFePO4) | Battery (LiFePO4) |
| Running / output watts | 7,200 W | 11,500 W |
| Starting / surge watts | 10,800 W | — |
| Battery capacity | 6,144 Wh | 13,500 Wh |
| Expandable to | 90,000 Wh | 54,000 Wh |
| Noise | — | — |
| Runtime | Fridge (~150W): ~35 hrs on base unit | Fridge (~150W): ~76 hrs (3+ days) per unit |
| Outlets | 11 outlets incl. 120/240V 30A L14-30, TT-30, NEMA 5-20s, USB-C, USB-A | Hardwired 120/240V whole-home via Gateway 3, Backup Gateway 2 or Backup Switch |
| Fuel tank | — | — |
| Weight | 164 lbs | 287 lbs |
| Transfer-switch ready | Yes | Yes |
| Warranty | 5-year | 10-year |
Highlighted cell is the better figure for that row.
Owner pros and cons
EcoFlow DELTA Pro Ultra
- +7200W/240V single stack runs nearly any household load including central AC (120A LRA)
- +Scales from 6kWh to 90kWh - buy capacity only as you need it
- +Smart Home Panel 2 gives true automatic whole-panel backup
- +5.6kW solar input per inverter is generator-replacement territory
- +Owners report seamless outage transitions with SHP2 - lights barely flicker
- +No permits or utility interconnection needed unlike installed batteries
- −Ecosystem lock-in: SHP2, cables, and batteries are all pricey proprietary add-ons
- −Fan noise under load is prominent - not a bedroom device
- −164 lbs for inverter + one battery; genuinely two-person
- −Idle/standby consumption meaningfully drains stored energy over multi-day outages
- −At full build-out, cost per kWh exceeds an installed home battery
Tesla Powerwall 3
- +11.5kW continuous + 185A LRA starts central AC without soft-starters
- +Integrated 6-MPPT solar inverter saves $2,000+ on new solar installs
- +Lowest installed cost per kWh of any major brand
- +LFP chemistry with 10-year, 70%-retention warranty
- +Storm Watch auto-charges before forecast severe weather
- −Some owners describe long support delays, though one early owner says support improved through 2025
- −Installer quote variance of thousands of dollars for identical systems
- −DC-couples only to Tesla's own solar - existing inverters must AC-couple
- −No federal tax credit in 2026 (25D expired) makes payback longer