For Chinese EV owners, the difference between guessing your electricity bill and knowing it comes down to one tool. This guide presents the home EV charging cost calculator factor in tiered electricity rates Beijing vs Shanghai — an interactive tool that moves beyond generic estimates to deliver your precise annual electricity cost, cost per kilometre, and true savings versus petrol. Using real 2026 TOU tariffs, vehicle efficiency data, and your specific charging mix (valley, flat, peak), the calculator reveals why Beijing owners save ¥159/year over Shanghai despite higher peak rates, why Chengdu’s hydropower makes it China’s cheapest EV city at just ¥0.053/km, and how even imperfect TOU adherence still delivers massive savings. Complete reference tables for BYD Han, NIO ET5, Wuling Mini EV, and Porsche Taycan — plus tiered pricing explanations, effective rate analysis, and the five mistakes that throw off most calculations. If you own an EV in China or are planning to install a home charger, this is the electricity cost reality check you need for 2026.