The robot mowers have a rain sensor that delays the start time if they sense rain or sprinklers operating. They're fine to operate in the rain given their light weight, but we default to waiting because:

  • Grass will collect on the unit
  • They are more likely to leave tracks in the grass
  • They are more likely to leave ruts on perimeter wire

If there are any areas with poor drainage or low areas that have standing water after a
thunderstorm they need to be fixed before the robot mower is installed. The robot mower has a rain sensor, but this will NOT prevent it from driving into standing water. Standing water is not good for the robot mowers as it can fry the motherboard of the mower if it drives into it. The cost to replace a motherboard is close to the cost of purchasing a brand new unit.