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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteWhich is better for your home? We install both. Here's our honest, spec-by-spec comparison based on real installation experience.
The Tesla Powerwall 3 wins this head-to-head comparison, taking 3 out of 5 categories. It's the stronger choice for most homeowners, especially those who prioritize whole-home backup with a single unit. That said, the Enphase IQ Battery 5P is still a solid product and may be the better pick if you specifically need homes with enphase microinverter systems.
Tesla · Powerwall 3
Enphase · IQ Battery 5P
| Spec | Tesla | Enphase |
|---|---|---|
| Usable Capacity | 13.5 kWh | 5 kWh |
| Continuous Power | 11.5 kW | 3.84 kW |
| Peak Power | 11.5 kW sustained | 7.68 kW (10 sec) |
| Round-trip Efficiency | 89% | 96% DC / 90% AC |
| Chemistry | LFP (Lithium Iron Phosphate) | LFP (Lithium Iron Phosphate) |
| Weight | 287 lbs (130 kg) | 185 lbs (84 kg) |
| Dimensions | 43.25 x 24.0 x 7.6 in | 26.1 x 42.0 x 12.6 in |
| Operating Temp | -20°C to 50°C | -15°C to 55°C |
| Connectivity | Tesla Gateway + Wi-Fi/Cellular | Enphase Envoy + Wi-Fi |
We evaluate each product across the metrics that matter most to homeowners.
Enphase IQ Battery 5P offers a longer 15-year warranty vs 10 years.
Enphase IQ Battery 5P is more affordable at $8,500 installed vs $15,400 installed.
Our crew rates the Tesla Powerwall 3 higher at 9/10 vs 8.5/10.
Tesla Powerwall 3 offers more storage at 13.5 kWh vs 5 kWh.
Tesla Powerwall 3 delivers more power at 11.5 kW vs 3.84 kW.
Powerwall 3 has a built-in solar inverter, so it replaces both the battery and inverter in a new solar+storage system — saves $2,000-3,000 vs separate components. Our Tesla-certified crew installs in 4-6 hours. The 11.5 kW continuous output means a single unit can back up the whole house including AC. Expansion packs ($5,900 each) add capacity without another inverter.
Our crew mounts the IQ 5P on a garage or basement wall in about 3 hours per unit. It pairs directly with the Enphase IQ System Controller — no separate gateway needed. We typically recommend 2-3 units for essential load backup or 4+ for near whole-home coverage. The modular approach means you can start small and add units later without rewiring.
The Tesla Powerwall 3 wins this head-to-head comparison, taking 3 out of 5 categories. It's the stronger choice for most homeowners, especially those who prioritize whole-home backup with a single unit. That said, the Enphase IQ Battery 5P is still a solid product and may be the better pick if you specifically need homes with enphase microinverter systems.
Our energy advisors can help you decide between the Tesla Powerwall 3 and Enphase IQ Battery 5P based on your specific home, budget, and energy goals.
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