The Clarity lineup uses different energy-storage solutions depending on the variant: the Plug-in Hybrid and Electric models rely on lithium-ion battery packs, while the Hydrogen Fuel Cell version employs a hydrogen-energy system with a smaller supporting battery. All variants also include a 12-volt auxiliary battery for traditional vehicle electronics.
Battery configurations across the Clarity lineup
Below is a quick overview of how the Clarity variants store and use energy. Each variant has a distinct approach to power storage, optimized for its propulsion method.
- Plug-in Hybrid (PHEV): a lithium-ion battery pack with a capacity around 17 kWh (roughly 15.5 kWh usable). It provides a limited all-electric range (roughly 40 miles on EPA testing) before the gasoline engine assists.
- Electric (BEV): a larger lithium-ion battery pack around 35.5 kWh, delivering all-electric driving with an EPA-range target near 89 miles in earlier model years.
- Fuel Cell (FCV): uses a hydrogen fuel-cell stack to generate electricity on demand and does not rely on a large traction battery for extended range. It includes a small high-voltage battery for power management and a 12-volt system for auxiliary loads.
In short, the Clarity’s battery setup varies by variant: PHEV and BEV use lithium-ion packs of different sizes, while the FCV uses hydrogen with a supplementary, smaller energy-storage system rather than a large battery pack.
By variant
Plug-in Hybrid (PHEV): lithium-ion battery
The PHEV version incorporates a 17 kWh lithium-ion battery (usable capacity around 15.5 kWh) that enables all-electric driving for a portion of daily trips. The battery is recharged via plugged-in charging and regenerative braking. This configuration pairs with an internal combustion engine to extend range when needed.
Electric (BEV): large lithium-ion battery
As the all-electric model, the BEV uses a sizable 35.5 kWh lithium-ion battery. This pack powers the electric motor for zero-emission driving and supports regenerative braking. Charging is possible through Level 2 (and other compatible methods) to replenish the pack between trips.
Fuel Cell (FCV): hydrogen energy with supporting battery
The FCV relies primarily on a hydrogen fuel-cell stack to generate electricity for the motor. It does not carry a large traction battery like the BEV or PHEV; instead, it uses a smaller high-voltage battery for control and power-management purposes, plus the standard 12-volt auxiliary battery for non-traction systems.
Note: The Clarity lineup has been phased out in many markets, and current availability varies by region. For buyers today, the focus is typically on how each variant handles energy storage and charging rather than on a single, uniform battery specification.
Common system elements
Across all Clarity variants, there is a reliance on a high-voltage electrical system to drive the electric motor, plus a separate 12-volt system for lights, sensors, and other accessories. The main difference lies in the traction energy storage (the battery pack) that powers the motor during everyday driving.
Summary
The Honda Clarity uses lithium-ion batteries for its Plug-in Hybrid (17 kWh) and Electric (35.5 kWh) variants, while the Hydrogen Fuel Cell version relies on a hydrogen-energy approach with a smaller supporting battery rather than a large traction battery. All versions also include a 12-volt auxiliary battery for standard vehicle electronics.