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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.
Both the Tesla Powerwall 3 and FranklinWH aPower 2 are excellent choices. The Tesla Powerwall 3 is better if you prioritize whole-home backup with a single unit, while the FranklinWH aPower 2 shines for true whole-home backup with highest capacity (15 kwh). For most homeowners, either product will serve you well — your choice should come down to which features matter most to your household.
Tesla · Powerwall 3
FranklinWH · aPower 2
| Spec | Tesla | FranklinWH |
|---|---|---|
| Usable Capacity | 13.5 kWh | 15 kWh |
| Continuous Power | 11.5 kW | 10 kW |
| Peak Power | 11.5 kW sustained | 15 kW (10 sec) |
| Round-trip Efficiency | 89% | 89% |
| Chemistry | LFP (Lithium Iron Phosphate) | LFP (Lithium Iron Phosphate) |
| Weight | 287 lbs (130 kg) | 331 lbs (150 kg) |
| Dimensions | 43.25 x 24.0 x 7.6 in | 43.5 x 30.0 x 14.6 in |
| Operating Temp | -20°C to 50°C | -20°C to 55°C |
| Connectivity | Tesla Gateway + Wi-Fi/Cellular | FranklinWH aGate + Wi-Fi/Ethernet |
We evaluate each product across the metrics that matter most to homeowners.
FranklinWH aPower 2 offers a longer 15-year warranty vs 10 years.
Tesla Powerwall 3 is more affordable at $15,400 installed vs $17,500 installed (with aGate).
Our installation crew rates both products equally at 9/10.
FranklinWH aPower 2 offers more storage at 15 kWh vs 13.5 kWh.
Tesla Powerwall 3 delivers more power at 11.5 kW vs 10 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.
The aPower 2 is our whole-home backup champion. The aGate controller installs next to the main panel and handles automatic load management — it can prioritize circuits and integrate with a generator for extended outages. Total install runs 5-7 hours with a two-person crew. IP67 rating means we can mount it outdoors without a shelter. Best choice when the customer wants to back up everything including central AC and EV charger.
Both the Tesla Powerwall 3 and FranklinWH aPower 2 are excellent choices. The Tesla Powerwall 3 is better if you prioritize whole-home backup with a single unit, while the FranklinWH aPower 2 shines for true whole-home backup with highest capacity (15 kwh). For most homeowners, either product will serve you well — your choice should come down to which features matter most to your household.
Our energy advisors can help you decide between the Tesla Powerwall 3 and FranklinWH aPower 2 based on your specific home, budget, and energy goals.
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