Affiliate Disclosure

Last updated: January 2026

WattSpend is reader-supported. To keep the calculators free, we earn money two ways: display advertising, and affiliate commissions on some of the products we link to.

How affiliate links work

When we recommend a product, for example, a Level 2 home charger, some links go to retailers like Amazon through an affiliate program. If you buy after clicking, we may earn a small commission. The price you pay is exactly the same. Affiliate links are labeled wherever they appear.

How we keep it honest

Our recommendations are based on fit for the job, not commission. We are not affiliated with any utility or automaker, and affiliate relationships never change the numbers our calculators produce or the methodology behind them.

Questions

If anything here is unclear, email hello@wattspend.com.