Free Tool
SU7 Charging Cost Calculator
With the default inputs — SU7 Max (101 kWh), charging from 20% to 80% at a China home rate of ¥0.55/kWh — one session costs about ¥37.03: 60.6 kWh goes into the pack and 67.3 kWh is billed at 90% charging efficiency. The same 20→80% charge costs about $10.77 at a US home rate of $0.16/kWh and €21.55 at an EU public DC rate of €0.32/kWh.
Pick your trim, set the start/end SOC, choose a price preset (or type your own), get the cost.
Last updated: · Unofficial, not affiliated with Xiaomi
Battery: 101 kWh usable
20%
80%
Estimated cost
¥37.03
Energy delivered60.6 kWh
Energy billed (incl. losses)67.3 kWh
Pack capacity101 kWh
Charge from / to20% → 80%
Assumptions & accuracy
- 01Charge efficiency is modelled at 92% for Standard/Pro and 90% for Max/Ultra (897V architecture has higher peak efficiency but more conversion stages).
- 02DC fast-charging adds an additional ~3-5% loss above 80% SOC; not included in the simple model.
- 03Public DC stations often add a per-session connection fee plus a per-minute idle fee; check your station's pricing.
- 04Cold weather (<5 °C) increases energy used per kWh added by 5-15% due to battery preconditioning.
- 05Numbers are estimates; actual cost will vary by station, time-of-use rate, and battery temperature.
Charging cost FAQ
- How much does it cost to charge a Xiaomi SU7 at home?
- Charging an SU7 Max from 20% to 80% bills about 67.3 kWh. At a China home rate of ¥0.55/kWh that is about ¥37.03; at a US overnight home rate of $0.16/kWh it is about $10.77.
- How much does a full charge of a Xiaomi SU7 cost?
- A 0–100% charge of the SU7 Max's 101 kWh pack bills about 112.2 kWh at 90% efficiency. That comes to about ¥61.72 at a China home rate of ¥0.55/kWh, ¥202.00 at a China public DC rate of ¥1.80/kWh and $17.96 at a US home rate of $0.16/kWh.
- Is DC fast charging more expensive than charging at home?
- Yes. The same 20→80% session on an SU7 Max costs about ¥37.03 at home in China (¥0.55/kWh) and ¥121.20 at a China public DC charger (¥1.80/kWh), 3.3 times as much. In the US it is about $10.77 at home ($0.16/kWh) against $22.89 at a Supercharger-class rate ($0.34/kWh). Public DC stations may also add session or idle fees.
- Why is the billed energy higher than the energy added to the battery?
- Some energy is lost as heat in the charger, the cable and the battery. The calculator assumes 92% charging efficiency for the Standard and Pro and 90% for the Max and Ultra, so the 60.6 kWh that goes into a Max's pack on a 20→80% charge is billed as about 67.3 kWh. It leaves out the extra 3–5% DC loss above 80% and cold-weather battery preconditioning.