Enphase vs Tesla Powerwall: Which Home Battery Is Better?

Short answer: Tesla Powerwall 3 ($11,500-$15,000 installed) wins on continuous power (11.5kW vs 3.84kW per Enphase IQ 5P) and all-in-one simplicity. Enphase IQ Battery 5P (~$5,000-$6,000 per unit installed) wins on modularity, LFP chemistry (vs Powerwall’s NMC), and installer availability. For most homeowners, Enphase’s LFP longevity and modular scaling are worth the higher per-kWh cost.

Specs Comparison

Spec	Tesla Powerwall 3	Enphase IQ Battery 5P
Usable capacity	13.5 kWh	5.0 kWh (per unit)
Continuous output	11.5 kW	3.84 kW (per unit)
Battery chemistry	NMC	LFP
Cycle life	1,500 cycles	4,000+ cycles
Lifespan (daily use)	~4 years	~11 years
Installed cost	$11,500-$15,000	$5,000-$6,000/unit
Expandable	Add units	Add units
Warranty	10 years	15 years

The Chemistry Decision

Powerwall 3 uses NMC chemistry — higher energy density (more power in less space) but 1,500 cycle lifespan. At one cycle per day, that’s approximately 4 years before significant capacity degradation. Enphase uses LFP — lower density but 4,000+ cycles, meaning 11+ years at daily use. For a 10-15 year investment horizon, Enphase’s longevity is a decisive advantage.

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