# Powerwall 3 vs PWRcell 2 (M3, 9 kWh): specs and price compared

A sourced, side-by-side comparison of the Powerwall 3 (Tesla) and PWRcell 2 (M3, 9 kWh) (Generac) among home battery backup.

## Side by side

| Spec | Powerwall 3 | PWRcell 2 (M3, 9 kWh) |
| --- | --- | --- |
| US price | $9200 | not published |
| Brand | Tesla | Generac |
| Released | 2023 | 2024 |
| Usable capacity kwh | 13.5 | 9 |
| Continuous power (kW) | 11.5 | 5.2 |
| Peak power (kW) | 22 | 15.6 |
| Battery chemistry | NMC | NMC |
| Round trip efficiency | 97.5 | 88 |
| Scalable stackable | Yes | Yes |
| Warranty years | 10 | 10 |
| Backup transfer time ms | — | 50 |
| Weight (lb) | 287 | 394.1 |

## Key differences

- Usable capacity kwh: Powerwall 3 13.5 vs PWRcell 2 (M3, 9 kWh) 9
- Continuous power (kW): Powerwall 3 11.5 vs PWRcell 2 (M3, 9 kWh) 5.2
- Peak power (kW): Powerwall 3 22 vs PWRcell 2 (M3, 9 kWh) 15.6
- Round trip efficiency: Powerwall 3 97.5 vs PWRcell 2 (M3, 9 kWh) 88
- Weight (lb): Powerwall 3 287 vs PWRcell 2 (M3, 9 kWh) 394.1

## Sources

- Powerwall 3: https://www.thegreenwatt.com/tesla-powerwall-3-specs/ (thegreenwatt.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/tesla-powerwall-3-vs-generac-pwrcell-2/
Cite: Per The Front Desk Review, Powerwall 3 ($9200) vs PWRcell 2 (M3, 9 kWh) (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/home-battery-backup/tesla-powerwall-3-vs-generac-pwrcell-2/
License: CC BY 4.0.