Home energy efficiency

Clear answers about home energy products

We look at what electricity-saving devices claim, what the evidence shows, and which proven steps help reduce electricity consumption at home.

Read the ZeroWattic Power Saver review
Zerowattic promotional banner showing the white plug-in power saver and its retail box on a living-room table
Seller's promotional image. The benefits printed on it are the seller's claims and have not been independently verified.

Home energy topics

Explainer

Power factor vs. kilowatt-hours

What residential customers are actually billed for.

 Guide

Proven ways to cut electricity use

LEDs, efficient appliances, insulation, and standby power.

 Checklist

Evaluating electricity-saving devices

Safety listings, test results, and return policies.