For the electric Hummer EV, the battery pack is 212 kilowatt-hours (kWh). Traditional gas-powered Hummer models (H1, H2, H3) use a conventional internal combustion powertrain and rely on a standard 12-volt automotive battery rather than a large high-voltage pack.
To understand the question in context, it helps to separate the electric Hummer from the legacy gasoline models. This article lays out the high-voltage battery size for the Hummer EV, notes how it differs from the older Hummers, and covers charging and warranty considerations.
Hummer EV battery size and charging
The following outlines the core high-voltage battery specifications and charging capabilities of the Hummer EV.
Key battery specifications for the Hummer EV include the following:
- High-voltage battery pack: 212 kWh Ultium pack
- Architecture: 800-volt system for faster charging and improved efficiency
- Charging capability: up to about 350 kW DC fast charging with compatible stations
- Module count and configuration: 24 Ultium modules comprised within the 212 kWh pack
- Estimated range: up to roughly 329 miles on the Edition 1 pickup; other trims/sizes vary around the 300-mile mark
These specifications illustrate the size and capabilities of the Hummer EV’s high-voltage battery and how it supports performance and charging speed.
Gas-powered Hummers: powertrain and battery context
Older Hummer models—H1, H2, and H3—are internal combustion vehicles and do not use a large high-voltage battery pack. They rely on conventional engines and a standard 12-volt battery for starting and electronics.
- 12-volt starting/auxiliary battery: typical automotive size for starting and electronics
- No large high-voltage battery pack like the EV model
In short, when people ask about the “battery size” for a Hummer, the electric version has a 212 kWh pack, while the legacy models use a standard 12-volt battery system rather than a large high-capacity pack.
Charging considerations and maintenance
For the Hummer EV, owners typically use Level 2 charging at home (240V) for daily charging and DC fast charging on the road to top up quickly. The 800V Ultium architecture supports high-speed charging at compatible stations, though real-world times depend on state of charge and station capabilities. The Ultium battery warranty with GM generally covers eight years or 100,000 miles, whichever comes first, with specifics varying by region.
Summary
The Hummer EV uses a 212 kWh Ultium high-voltage battery housed in an 800-volt architecture, enabling strong performance and fast charging. By contrast, the original H1/H2/H3 models run on internal combustion engines and use a conventional 12-volt starting battery, not a large high-voltage pack. For most readers, the key takeaway is the 212 kWh battery for the electric Hummer and the absence of a similarly sized battery in the legacy models.