The Front Desk Review

Best Home Battery Backup · head-to-head

FranklinWH aPower 2 vs Generac PWRcell 2 (M3, 9 kWh)

A sourced, side-by-side comparison. FranklinWH aPower 2 is cheaper at —. Every spec and price links to its source.

Which is better: the FranklinWH aPower 2 or Generac PWRcell 2 (M3, 9 kWh)?

The FranklinWH aPower 2 wins 1 of the 1 specs we compare head to head; the other wins 0.

See FranklinWH aPower 2 on Amazon See Generac PWRcell 2 (M3, 9 kWh) on Amazon

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Full spec sheet

✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.

Spec FranklinWH aPower 2 Generac PWRcell 2 (M3, 9 kWh)
US price — —
BrandFranklinWHGenerac
Released20242024
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 — FranklinWH aPower 2: franklinwh.com (verified 2026-08-01). Generac PWRcell 2 (M3, 9 kWh): generac.com (verified 2026-08-01).

What's the difference between the FranklinWH aPower 2 and Generac 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): FranklinWH aPower 2 15 vs Generac PWRcell 2 (M3, 9 kWh) 9
  • Continuous power (kW): FranklinWH aPower 2 10 vs Generac PWRcell 2 (M3, 9 kWh) 5.2
  • Peak power (kW): FranklinWH aPower 2 15 vs Generac PWRcell 2 (M3, 9 kWh) 15.6
  • Battery chemistry: FranklinWH aPower 2 LFP vs Generac PWRcell 2 (M3, 9 kWh) NMC
  • Round trip efficiency: FranklinWH aPower 2 90 vs Generac PWRcell 2 (M3, 9 kWh) 88
  • Warranty years: FranklinWH aPower 2 15 vs Generac PWRcell 2 (M3, 9 kWh) 10
  • Weight (lb): FranklinWH aPower 2 357 vs Generac PWRcell 2 (M3, 9 kWh) 394.1

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