Energy efficiency (kWh)

The newer Henry HVR160 uses a 620 watt motor instead of the older 1200 watt design, cutting power consumption roughly in half and making it cheaper to run while still providing acceptable performance for household and detailing tasks.

With an A rating on the EU energy label, a 620 W-class motor and modest quoted annual kWh usage, Henry Extra is designed to maintain or improve cleaning performance over the old 1200 W models while cutting electricity consumption, and reviewers say the 580–620 W motor feels really economical to run at a time when rising energy costs make efficiency especially important.

Valley charging schedules the robot to recharge during off-peak hours, and efficient HydroJet mop washing uses less water so the dirty tank fills more slowly.

Energy use while docked is described as low by iRobot via reviewer reporting, with some mention of settings that can reduce it further. Few reviews provide measured kWh, but idle power management is discussed as configurable.

Energy use is a major downside of the S10 Ultra, as its water capture and distillation dock draws far more power per cycle than competitors and can noticeably increase monthly electricity consumption if run nightly.