Generac
Generac PWRcell 2 (M3, 9 kWh)
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Released 2024
Best Home Battery Backup · head-to-head
Generac PWRcell 2 (M3, 9 kWh) vs Anker SOLIX X1 (15 kWh)
A sourced, side-by-side comparison. Generac PWRcell 2 (M3, 9 kWh) is cheaper at —. Every spec and price links to its source.
Anker
Anker SOLIX X1 (15 kWh)
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Released 2024
Which is better: the Generac PWRcell 2 (M3, 9 kWh) or Anker SOLIX X1 (15 kWh)?
The Anker SOLIX X1 (15 kWh) 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 |  Generac PWRcell 2 (M3, 9 kWh) |  Anker SOLIX X1 (15 kWh) |
|---|---|---|
| US price | — | — |
| Brand | Generac | Anker |
| Released | 2024 | 2024 |
| Usable capacity (kWh) | 9 | 15 |
| Continuous power (kW) | 5.2 | 6 |
| Peak power (kW) | 15.6 | 12 |
| Battery chemistry | NMC | LiFePO4 (LFP) |
| Round trip efficiency | 88 | 90.2 |
| Scalable stackable | Yes | Yes |
| Warranty years | 10 | 10 |
| Backup transfer time (ms) | 50 | — |
| Weight (lb) | 394.1 | 389 |
Sources — Generac PWRcell 2 (M3, 9 kWh): generac.com (verified 2026-08-01). Anker SOLIX X1 (15 kWh): ankersolix.com (verified 2026-08-01).
What's the difference between the Generac PWRcell 2 (M3, 9 kWh) and Anker SOLIX X1 (15 kWh)?
Where the two actually differ on the specs we track (6 of 9). Matching specs are omitted.
- Usable capacity (kWh): Generac PWRcell 2 (M3, 9 kWh) 9 vs Anker SOLIX X1 (15 kWh) 15
- Continuous power (kW): Generac PWRcell 2 (M3, 9 kWh) 5.2 vs Anker SOLIX X1 (15 kWh) 6
- Peak power (kW): Generac PWRcell 2 (M3, 9 kWh) 15.6 vs Anker SOLIX X1 (15 kWh) 12
- Battery chemistry: Generac PWRcell 2 (M3, 9 kWh) NMC vs Anker SOLIX X1 (15 kWh) LiFePO4 (LFP)
- Round trip efficiency: Generac PWRcell 2 (M3, 9 kWh) 88 vs Anker SOLIX X1 (15 kWh) 90.2
- Weight (lb): Generac PWRcell 2 (M3, 9 kWh) 394.1 vs Anker SOLIX X1 (15 kWh) 389