EcoFlow DELTA Pro Ultra vs Tesla Powerwall 3
Quick take: The EcoFlow DELTA Pro Ultra costs $10,001 less; the Tesla Powerwall 3 puts out more sustained power (11,500W).
| Spec | EcoFlow DELTA Pro Ultra | Tesla Powerwall 3 |
|---|---|---|
| Price | $4,999 | $15,000 |
| Rating | 4.7★ (450) | 4.6★ (900) |
| Type | Power Station | Home Battery System |
| Fuel | Battery (LiFePO4) | Battery (LiFePO4) |
| Running / Output Watts | 7,200W | 11,500W |
| Starting / Surge Watts | 10,800W | 22,000W |
| Battery Capacity | 6,144Wh | 13,500Wh |
| Expandable To | 90,000Wh | 54,000Wh |
| 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 Backup Gateway 2 or Backup Switch |
| Fuel Tank | — | — |
| Weight | 164 lbs | 287 lbs |
| Transfer-switch ready | Yes | Yes |
| Warranty | 5-year | 10-year |
Pros & 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
- ✓Tesla app is the consensus best monitoring experience
- ✓LFP chemistry with 10-year, 70%-retention warranty
- ✓Storm Watch auto-charges before forecast severe weather
- ✗Documented hum/vibration complaints from a minority of installs
- ✗Support routing between Tesla and certified installers frustrates owners
- ✗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