Generac PWRcell 2
Generac states 9 kWh (PWRcell 2 M3, United States) to 18 kWh (PWRcell 2 M6, United States) usable energy.
Generac states 5.2 kW (PWRcell 2 M3, United States) to 10.5 kW (PWRcell 2 M6, United States) continuous power.
Warranty terms: 10 years; warranted throughput: 7.56 MWh (per module); capacity at warranty end: 70%.
Named configurations include PWRcell 2 M3, PWRcell 2 M4, PWRcell 2 M5 and PWRcell 2 M6.
Brand: Generac
Published figures
No figures have been collected for units per system.
| Figure | Value | Publisher | Source |
|---|---|---|---|
| Usable energy | 18 kWh | Manufacturer Not yet checked | Spec sheet, at p.5 / BATTERY CONFIGURATIONS, retrieved Sep 23, 2026 |
| Usable energy, Generac PWRcell 2 M3 (9 kWh), Generac PWRcell 2 M3 | 9 kWh | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Usable Energy, retrieved Sep 23, 2026 |
| Usable energy, Generac PWRcell 2 M4 (12 kWh), Generac PWRcell 2 M4 | 12 kWh | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Usable Energy, retrieved Sep 23, 2026 |
| Usable energy, Generac PWRcell 2 M5 (15 kWh), Generac PWRcell 2 M5 | 15 kWh | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Usable Energy, retrieved Sep 23, 2026 |
| Usable energy, Generac PWRcell 2 M6 (18 kWh), Generac PWRcell 2 M6 | 18 kWh | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Usable Energy, retrieved Sep 23, 2026 |
| Continuous power | 10.5 kW | Manufacturer Not yet checked | Spec sheet, at p.2 / PERFORMANCE, retrieved Sep 23, 2026 |
| Continuous power, Generac PWRcell 2 M3 (9 kWh), Generac PWRcell 2 M3 | 5.2 kW | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. Continuous Power, retrieved Sep 23, 2026 |
| Continuous power, Generac PWRcell 2 M4 (12 kWh), Generac PWRcell 2 M4 | 7 kW | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. Continuous Power, retrieved Sep 23, 2026 |
| Continuous power, Generac PWRcell 2 M5 (15 kWh), Generac PWRcell 2 M5 | 8.7 kW | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. Continuous Power, retrieved Sep 23, 2026 |
| Continuous power, Generac PWRcell 2 M6 (18 kWh), Generac PWRcell 2 M6 | 10.5 kW | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. Continuous Power, retrieved Sep 23, 2026 |
| Peak power (AC) | 11.5 kW | Manufacturer Not yet checked | Spec sheet, at p.7 PWRcell 2 Inverter / AC Output, retrieved Sep 23, 2026 |
| Motor start (LRA), Generac PWRcell 2 M3 (9 kWh), Generac PWRcell 2 M3 | 65 A | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. AC Start Capacity, retrieved Sep 23, 2026 |
| Motor start (LRA), Generac PWRcell 2 M4 (12 kWh), Generac PWRcell 2 M4 | 87 A | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. AC Start Capacity, retrieved Sep 23, 2026 |
| Motor start (LRA), Generac PWRcell 2 M5 (15 kWh), Generac PWRcell 2 M5 | 108 A | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. AC Start Capacity, retrieved Sep 23, 2026 |
| Motor start (LRA), Generac PWRcell 2 M6 (18 kWh), Generac PWRcell 2 M6 | 130 A | Manufacturer Not yet checked | Spec sheet, at p.2 PWRcell 2 System Specifications / Max. AC Start Capacity, retrieved Sep 23, 2026 |
| Round-trip efficiency | 88% | Manufacturer Not yet checked | Spec sheet, at p.2 / PERFORMANCE, retrieved Sep 23, 2026 |
| Lowest operating temperature (discharging) | −20°C | Manufacturer Not yet checked | Spec sheet, at p.2 / ENVIRONMENTAL, retrieved Sep 23, 2026 |
| Lowest operating temperature (charging) | −5°C | Manufacturer Not yet checked | Spec sheet, at p.2 / ENVIRONMENTAL, retrieved Sep 23, 2026 |
| Highest operating temperature (discharging) | 50°C | Manufacturer Not yet checked | Spec sheet, at p.2 / ENVIRONMENTAL, retrieved Sep 23, 2026 |
| Highest operating temperature (charging) | 50°C | Manufacturer Not yet checked | Spec sheet, at p.2 / ENVIRONMENTAL, retrieved Sep 23, 2026 |
| Weight, Generac PWRcell 2 M3 (9 kWh), Generac PWRcell 2 M3 | 126.1 kg | Manufacturer Not yet checked | Spec sheet, at p.5 Battery Cabinet Specifications / Total Weight of Installed Unit, retrieved Sep 23, 2026 |
| Weight, Generac PWRcell 2 M4 (12 kWh), Generac PWRcell 2 M4 | 151 kg | Manufacturer Not yet checked | Spec sheet, at p.5 Battery Cabinet Specifications / Total Weight of Installed Unit, retrieved Sep 23, 2026 |
| Weight, Generac PWRcell 2 M5 (15 kWh), Generac PWRcell 2 M5 | 176 kg | Manufacturer Not yet checked | Spec sheet, at p.5 Battery Cabinet Specifications / Total Weight of Installed Unit, retrieved Sep 23, 2026 |
| Weight, Generac PWRcell 2 M6 (18 kWh), Generac PWRcell 2 M6 | 200.9 kg | Manufacturer Not yet checked | Spec sheet, at p.5 Battery Cabinet Specifications / Total Weight of Installed Unit, retrieved Sep 23, 2026 |
See it on the home battery chart
Stated temperature limits
Stated charging range: 23°F (−5°C) to 122°F (50°C).
Stated discharging range: −4°F (−20°C) to 122°F (50°C).
Battery’s stated motor-start current: 65 A for the Generac PWRcell 2 M3, 87 A for the Generac PWRcell 2 M4, 108 A for the Generac PWRcell 2 M5, 130 A for the Generac PWRcell 2 M6 (LRA means locked-rotor amps, a motor’s starting current). Compare starting current.
Warranty terms
| Term | Figure | Document |
|---|---|---|
| Warranty | 10 years | Warranty, at p.1 / Warranty Coverage table, retrieved Sep 23, 2026 |
| Warranted throughput | per module: 7.56 MWh | Warranty, at p.1 / Warranty Coverage table, retrieved Sep 23, 2026 |
| Capacity at warranty end | 70% | Warranty, at p.1 / Warranty Coverage table, retrieved Sep 23, 2026 |
Features the manufacturer states
| Feature | Stated | Source |
|---|---|---|
| Chemistry | NMC Not yet checked | Spec sheet, at p.6 / 3.0 kWh DCB Battery Module > MECHANICAL, retrieved Sep 23, 2026 |
| Coupling | AC Not yet checked | Spec sheet, at p.1, retrieved Sep 23, 2026 |
| Whole-home backup | Yes Not yet checked | Spec sheet, at p.2 Smart Disconnect Switch panel, retrieved Sep 23, 2026 |
| Backup | Whole and partial home backup up to 200 A via Smart Disconnect Switch, automatic transfer < 50 ms, generator integration up to 28 kW Not yet checked | Spec sheet, at p.2 Smart Disconnect Switch panel, retrieved Sep 23, 2026 |
| Built-in inverter | No Not yet checked | Spec sheet, at p.7 PWRcell 2 Inverter, retrieved Sep 23, 2026 |
| Compatible inverters | Generac PWRmicro and Enphase IQ8 (AC-coupled PV) Not yet checked | Spec sheet, at p.2 System Specifications, retrieved Sep 23, 2026 |
| Enclosure rating | NEMA 3R Not yet checked | Spec sheet, at p.2 Environmental, retrieved Sep 23, 2026 |
| Nominal battery voltage | 46.8 V Not yet checked | Spec sheet, at p.6 DCB Battery Module / Nominal Voltage, retrieved Sep 23, 2026 |
| Grid voltage | 120/240 split phase V AC Not yet checked | Spec sheet, at p.7 PWRcell 2 Inverter / Nominal Grid Voltage, retrieved Sep 23, 2026 |
| Dimensions | 271 x 582 x 1777 (D x W x H) mm Not yet checked | Spec sheet, at p.5 Battery Cabinet Specifications / Dimensions, retrieved Sep 23, 2026 |
Configurations
Configurations named by the figures
- PWRcell 2 M3
- PWRcell 2 M4
- PWRcell 2 M5
- PWRcell 2 M6
Government and program lists
This product is on none of the lists this site reads.
Installs
No install count this site publishes covers this product.
Recalls and safety notices
No notice in the recall sources this site reads is matched to this product. That is not a safety finding. See every recall notice.
- UL 9540 listed: Yes
- UL 9540A tested: Yes
The maker states the listing or test. The listing body's records have not been checked.
Backup hours from your load
The stated usable energy divided by your load gives hours, starting with a full battery.
The spec sheet states its usable energy at 25°C.
Spec sheet, at p.2 PWRcell 2 System Specifications / Usable Energy, retrieved Sep 23, 2026 Not yet checked
Backup hours follow the California Air Resources Board’s Zero Emissions Residential Backup Power Tool. Appliance figures come from the US Department of Energy’s Estimating Appliance and Home Electronic Energy Use (2012).
- The appliance figures are nameplate maximums. Average demand changes as appliances cycle and their settings change.
- A load above the stated continuous power gets no figure.
- Motor starts use three times the largest selected motor’s watts, plus the other loads. This estimate is checked against stated peak power when available. Other loads are counted at their running watts.
- Inverter and battery losses are not counted. A field study of household backup power explains the gap.
- Solar recharge, reserves, and temperature changes are outside the calculation.