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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 FranklinWH aPower 2 wins this head-to-head comparison, taking 3 out of 5 categories. It's the stronger choice for most homeowners, especially those who prioritize true whole-home backup with highest capacity (15 kwh). 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.
Enphase · IQ Battery 5P
FranklinWH · aPower 2
| Spec | Enphase | FranklinWH |
|---|---|---|
| Usable Capacity | 5 kWh | 15 kWh |
| Continuous Power | 3.84 kW | 10 kW |
| Peak Power | 7.68 kW (10 sec) | 15 kW (10 sec) |
| Round-trip Efficiency | 96% DC / 90% AC | 89% |
| Chemistry | LFP (Lithium Iron Phosphate) | LFP (Lithium Iron Phosphate) |
| Weight | 185 lbs (84 kg) | 331 lbs (150 kg) |
| Dimensions | 26.1 x 42.0 x 12.6 in | 43.5 x 30.0 x 14.6 in |
| Operating Temp | -15°C to 55°C | -20°C to 55°C |
| Connectivity | Enphase Envoy + Wi-Fi | FranklinWH aGate + Wi-Fi/Ethernet |
We evaluate each product across the metrics that matter most to homeowners.
Both offer 15-year warranties.
Enphase IQ Battery 5P is more affordable at $8,500 installed vs $17,500 installed (with aGate).
Our crew rates the FranklinWH aPower 2 higher at 9/10 vs 8.5/10.
FranklinWH aPower 2 offers more storage at 15 kWh vs 5 kWh.
FranklinWH aPower 2 delivers more power at 10 kW vs 3.84 kW.
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 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.
The FranklinWH aPower 2 wins this head-to-head comparison, taking 3 out of 5 categories. It's the stronger choice for most homeowners, especially those who prioritize true whole-home backup with highest capacity (15 kwh). 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 Enphase IQ Battery 5P and FranklinWH aPower 2 based on your specific home, budget, and energy goals.
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