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.