The WattSpend Blog
Detailed, number-first writing on what EVs and home energy actually cost, with the data and the math shown. Updated for 2026.
Data study The Cheapest and Most Expensive States to Charge an EV (2026) Cheapest states to charge an EV in 2026, ranked by ¢/kWh and $/month for a Tesla Model Y. See the top 10 cheapest and most expensive states. 9 min read
Charging costs
How Much Does It Cost to Charge an EV Each Month?
EV charging cost per month, broken down by miles driven, car efficiency, and state rate. See real numbers and
9 min read
Charging costs
EV vs Gas in 2026: The Real Cost Per Mile and 5-Year Savings
EV vs gas cost in 2026: about 4.7¢/mile electric vs 11.4¢/mile gas, plus maintenance, 5-year savings, break-ev
9 min read
Charging costs
How Much Does It Cost to Charge an EV with Home Solar?
Cost to charge an EV with home solar runs about 5-8¢/kWh amortized vs 16.5¢ grid. See real math, net metering,
9 min read
Tax credits
EV and Home Energy Tax Credits in 2026: What Changed and What Is Left
EV and home energy tax credits in 2026 changed fast. The EV purchase credit ended, the charger credit expires
9 min read
Home energy costs
Is a Home Battery Worth It in 2026?
Is a home battery worth it in 2026? We break down backup, TOU arbitrage, and solar payback against a $10k–$18k
9 min read