Tesla Powerwall 3 vs Enphase IQ Battery 5P
Quick take: The Enphase IQ Battery 5P costs $8,500 less; the Tesla Powerwall 3 puts out more sustained power (11,500W).
| Spec | Tesla Powerwall 3 | Enphase IQ Battery 5P |
|---|---|---|
| Price | $15,000 | $6,500 |
| Rating | 4.6★ (900) | 4.5★ (400) |
| Type | Home Battery System | Home Battery System |
| Fuel | Battery (LiFePO4) | Battery (LiFePO4) |
| Running / Output Watts | 11,500W | 3,840W |
| Starting / Surge Watts | 22,000W | 7,680W |
| Battery Capacity | 13,500Wh | 5,000Wh |
| Expandable To | 54,000Wh | 40,000Wh |
| Noise | — | — |
| Runtime | Fridge (~150W): ~76 hrs (3+ days) per unit | Fridge (~150W): ~28 hrs per module |
| Outlets | Hardwired 120/240V whole-home via Backup Gateway 2 or Backup Switch | Hardwired 240V AC-coupled; backup circuits via IQ System Controller |
| Fuel Tank | — | — |
| Weight | 287 lbs | 174 lbs |
| Transfer-switch ready | Yes | Yes |
| Warranty | 10-year | 15-year |
Pros & cons
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
Enphase IQ Battery 5P
- ✓15-year / 6,000-cycle warranty - longest in the industry
- ✓Distributed microinverters mean no single point of failure
- ✓Modular sizing: start at 5kWh, add modules anytime
- ✓96% DC round-trip efficiency
- ✓Seamless integration and monitoring with existing Enphase solar
- ✓7.68kW peak per module aids motor starting despite modest continuous rating
- ✗$1,000-1,600 per installed kWh - among the priciest mainstream options
- ✗Whole-home backup requires 3+ modules plus costly IQ System Controller
- ✗3.84kW continuous per module is weak alone - central AC needs multiple
- ✗Enphase-ecosystem lock-in for full functionality