Understanding Bad Harmonics: The Hidden Threat to Your Home Appliances

Bad harmonics, also called “noisy” or “distorted” power, is a significant issue affecting the electrical grid. Noisy power occurs when the electrical waves traveling through high-voltage lines become flat or deviate from their ideal shape. This distortion can be likened to the static noise from an overloaded speaker.

Bad harmonics can lead to problems in home electronics. Appliances like refrigerators and air conditioners may run hotter or rattle due to distorted power. Bob Marshall, CEO of Whisker Labs, explains that the damage from high harmonics builds up over time. This gradual wear can shorten the lifespan of appliances and increase energy consumption.

Approximately 70% of US homes with problematic levels of bad harmonics are located within 10 utility territories, including areas like Chicago, Denver, Boulder, Seattle, parts of New Jersey, and Baltimore. Noisy power is just one indicator of a stressed electrical grid. This grid is challenged by extreme weather, rising demand, and aging infrastructure.

Total harmonic distortion is a key metric used to monitor power quality. Engineering standards set limits for acceptable distortion levels, with tolerances exceeding 8% considered serious. Although it is difficult to link bad harmonics directly to specific appliance failures, the long-term financial impact on consumers can be substantial.

Whisker Labs plans to notify customers with home sensors about bad harmonics starting this week. This will help homeowners communicate potential issues to local utilities. The company already alerts residents to fire risks caused by power surges, using its devices to measure power quality more broadly.

By understanding the implications of bad harmonics, consumers can take steps to protect their appliances and manage their energy use effectively.