Tool
DELTA Pro UltraVSPowerwall 3
Compare specs, verdicts, and use-case scores side by side.
Quick Take
Box-shipped expandable backup vs the installed Powerwall foil.
Best for Home Backup, CPAP, Remote Work / Starlink, and Van Life / RV: Powerwall 3
Home Backup→Powerwall 3CPAP→Powerwall 3Remote Work / Starlink→Powerwall 3+1 more
| Spec | DELTA Pro Ultra | Powerwall 3 |
|---|---|---|
| Capacity | 6.1kWh | 13.5kWh✓ |
| AC Output | 7.2kW | 11.5kW✓ |
| Surge Power | 10.8kW | 11.5kW✓ |
| Weight | 186.4 lbs✓ | 287 lbs |
| Solar Input | 5.6kW | 20kW✓ |
| AC Charge | 3kW✓ | — |
Keep in mind
Verdicts are based on manufacturer-published specs. Real-world performance varies with temperature, battery age, and load type. Use this as a starting point, not a final verdict.