LG Electronics
ESS Home 8
—
Best Home Battery Backup · head-to-head
ESS Home 8 vs PWRcell 2 (M3, 9 kWh)
A sourced, side-by-side comparison. ESS Home 8 is cheaper at —. Every spec and price links to its source.
Generac
PWRcell 2 (M3, 9 kWh)
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Released 2024
Which is better: the ESS Home 8 or PWRcell 2 (M3, 9 kWh)?
They split the 2 specs we compare evenly.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | ESS Home 8 | PWRcell 2 (M3, 9 kWh) |
|---|---|---|
| US price | — | — |
| Brand | LG Electronics | Generac |
| Released | — | 2024 |
| Usable capacity kwh | 14.4 | 9 |
| Continuous power (kW) | 7.5 | 5.2 |
| Peak power (kW) | 9 | 15.6 |
| Battery chemistry | Li-ion (cylindrical cells) | NMC |
| Round trip efficiency | 90 | 88 |
| Scalable stackable | Yes | Yes |
| Warranty years | 10 | 10 |
| Backup transfer time ms | 100 | 50 |
| Weight (lb) | 359 | 394.1 |
Sources — ESS Home 8: lg.com (verified 2026-08-01). PWRcell 2 (M3, 9 kWh): generac.com (verified 2026-08-01).
What's the difference between the ESS Home 8 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: ESS Home 8 14.4 vs PWRcell 2 (M3, 9 kWh) 9
- Continuous power (kW): ESS Home 8 7.5 vs PWRcell 2 (M3, 9 kWh) 5.2
- Peak power (kW): ESS Home 8 9 vs PWRcell 2 (M3, 9 kWh) 15.6
- Battery chemistry: ESS Home 8 Li-ion (cylindrical cells) vs PWRcell 2 (M3, 9 kWh) NMC
- Round trip efficiency: ESS Home 8 90 vs PWRcell 2 (M3, 9 kWh) 88
- Backup transfer time ms: ESS Home 8 100 vs PWRcell 2 (M3, 9 kWh) 50
- Weight (lb): ESS Home 8 359 vs PWRcell 2 (M3, 9 kWh) 394.1