# ESS Home 8 vs PWRcell 2 (M3, 9 kWh): specs and price compared

A sourced, side-by-side comparison of the ESS Home 8 (LG Electronics) and PWRcell 2 (M3, 9 kWh) (Generac) among home battery backup.

## Side by side

| Spec | ESS Home 8 | PWRcell 2 (M3, 9 kWh) |
| --- | --- | --- |
| US price | not published | not published |
| 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 |

## Key differences

- 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

## Sources

- ESS Home 8: https://www.lg.com/us/ess/pdf/LG-ESS-Home8-spec-sheet-DIGITAL.pdf (lg.com, verified 2026-08-01)
- PWRcell 2 (M3, 9 kWh): https://www.generac.com/globalassets/residential/dealers--installers/generac-installer-programs/solar--battery-installer-support/pc2brochure_specguide.pdf (generac.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/home-battery-backup/lg-ess-home-8-vs-generac-pwrcell-2/
Cite: Per The Front Desk Review, ESS Home 8 (not published) vs PWRcell 2 (M3, 9 kWh) (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/home-battery-backup/lg-ess-home-8-vs-generac-pwrcell-2/
License: CC BY 4.0.