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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 Enphase IQ Battery 10C and FranklinWH aPower 2 are excellent choices. The Enphase IQ Battery 10C is better if you prioritize best overall battery for enphase solar systems, 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.
Enphase · IQ Battery 10C
FranklinWH · aPower 2
| Spec | Enphase | FranklinWH |
|---|---|---|
| Usable Capacity | 10 kWh | 15 kWh |
| Continuous Power | 7.08 kW | 10 kW |
| Peak Power | 14.16 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 | 310 lbs (141 kg) | 331 lbs (150 kg) |
| Dimensions | 32.0 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 10C is more affordable at $13,000 installed vs $17,500 installed (with aGate).
Our crew rates the Enphase IQ Battery 10C higher at 9.5/10 vs 9/10.
FranklinWH aPower 2 offers more storage at 15 kWh vs 10 kWh.
FranklinWH aPower 2 delivers more power at 10 kW vs 7.08 kW.
The IQ 10C is Enphase's Gen4 flagship battery. It's heavier than the 5P (310 lbs vs 185 lbs), so we bring a two-person crew. The install is similar to the 5P — wall-mount, connect to IQ System Controller, configure via Enphase app. The 7 kW continuous power is enough to back up essential loads plus a mini-split AC. For whole-home backup, we recommend two 10C units.
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 Enphase IQ Battery 10C and FranklinWH aPower 2 are excellent choices. The Enphase IQ Battery 10C is better if you prioritize best overall battery for enphase solar systems, 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 Enphase IQ Battery 10C and FranklinWH aPower 2 based on your specific home, budget, and energy goals.
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