FranklinWH
aPower 2
—
Released 2024
Best Home Battery Backup · head-to-head
aPower 2 vs PWRcell 2 (M3, 9 kWh)
A sourced, side-by-side comparison. aPower 2 is cheaper at —. Every spec and price links to its source.
Generac
PWRcell 2 (M3, 9 kWh)
—
Released 2024
Which is better: the aPower 2 or PWRcell 2 (M3, 9 kWh)?
The aPower 2 wins 1 of the 1 specs we compare head to head; the other wins 0.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | aPower 2 | PWRcell 2 (M3, 9 kWh) |
|---|---|---|
| US price | — | — |
| Brand | FranklinWH | Generac |
| Released | 2024 | 2024 |
| Usable capacity kwh | 15 | 9 |
| Continuous power (kW) | 10 | 5.2 |
| Peak power (kW) | 15 | 15.6 |
| Battery chemistry | LFP | NMC |
| Round trip efficiency | 90 | 88 |
| Scalable stackable | Yes | Yes |
| Warranty years | 15 | 10 |
| Backup transfer time ms | — | 50 |
| Weight (lb) | 357 | 394.1 |
Sources — aPower 2: franklinwh.com (verified 2026-08-01). PWRcell 2 (M3, 9 kWh): generac.com (verified 2026-08-01).
What's the difference between the aPower 2 and PWRcell 2 (M3, 9 kWh)?
Where the two actually differ on the specs we track (7 of 9). Matching specs are omitted.
- Usable capacity kwh: aPower 2 15 vs PWRcell 2 (M3, 9 kWh) 9
- Continuous power (kW): aPower 2 10 vs PWRcell 2 (M3, 9 kWh) 5.2
- Peak power (kW): aPower 2 15 vs PWRcell 2 (M3, 9 kWh) 15.6
- Battery chemistry: aPower 2 LFP vs PWRcell 2 (M3, 9 kWh) NMC
- Round trip efficiency: aPower 2 90 vs PWRcell 2 (M3, 9 kWh) 88
- Warranty years: aPower 2 15 vs PWRcell 2 (M3, 9 kWh) 10
- Weight (lb): aPower 2 357 vs PWRcell 2 (M3, 9 kWh) 394.1