Skip to content
Zeekr Insiders home
Join us

kW vs kWh

Last checked: 8 November 2026.

Two units, two different jobs. Mixing them up is the most common EV confusion.

  • kWh (kilowatt-hour) is an amount of energy. It is how big the battery is, and what you buy from the grid.
  • kW (kilowatt) is a rate of power. It is how fast energy moves: charger speed, motor output.

The tank and the tap

The battery is the tank, measured in kWh. The charger is the tap, measured in kW. A bigger tap fills the same tank faster. It does not make the tank bigger.

The tank and the tap The battery is a tank measured in kWh, the energy stored. The charger or motor is a tap measured in kW, power, the rate energy flows. Time in hours equals energy in kWh divided by power in kW: 60 kWh needed at 7 kW is about 8.6 hours. A motor output of 335 kW is the rate the motor can draw, not how much energy is stored. ENERGY AND POWER: THE TANK AND THE TAP A bigger tap fills the same tank faster. It does not make the tank bigger. Battery kWh Energy stored Charger or motor kW Power: the rate energy flows time (h) = energy (kWh) / power (kW) 60 kWh needed / 7 kW = about 8.6 hours Motor output 335 kW means the rate the motor can draw, not how much energy is stored.
The battery is the tank, in kWh. The charger is the tap, in kW.

Where you see each

Where Unit Example
Battery size kWh 61 kWh (X RWD), 75 kWh (7X RWD), 100 kWh (7X Long Range, AWD), 116 kWh (009 FWD)123
Charger speed kW 7 kW home wallbox, 22 kW three-phase AC, up to 420 or 450 kW DC on the 7X245
Motor output kW 335 kW or 500 kW (MY27 7X)2
Efficiency kWh per 100 km What the trip computer shows
Your power bill kWh Priced per kWh by your retailer

The 7X also has vehicle-to-load output rated in kW (3.3 kW), covered in V2L, V2H and V2G6.

The two sums

Charge time = energy needed (kWh) divided by power (kW). A flat battery to full on a 7 kW charger for a 75 kWh pack is 75 / 7, about 10.7 hours, before charging losses. Real sessions run a little longer because some energy is lost as heat and the charge slows near full; we have not sourced a loss figure, so allow some margin. The full table is in Home charging explained.

Running cost = energy used (kWh) times your price per kWh. For example, adding 60 kWh at 15c/kWh costs $9. That rate is an example, not a quote; read your own bill.

Range added = power (kW) divided by consumption (kWh per 100 km), times 100, per hour. RACV gives the ballpark of what that looks like: 7 kW single-phase adds about 35 to 40 km of range per hour, and up to 22 kW three-phase about 50 to 130 km per hour7.

Do not confuse kW with kWh in specs

You will see "kWh" mistakenly used for power in the wild. For example, Zeekr Australia's own X page describes its V2L as "3.3 kWh", which is almost certainly a typo for kW8.

Sources 8Everything on this page is sourced from the links below.

  1. CarExpert, "2026 Zeekr X price and specs updated: EV gets massive price cuts", https://www.carexpert.com.au/car-news/2026-zeekr-x-price-and-specs-updated-ev-gets-massive-price-cuts-1, accessed 8 November 2026.

  2. CarExpert, "2027 Zeekr 7X update: more power, same price", https://www.carexpert.com.au/car-news/2027-zeekr-7x-update-more-power-same-price, accessed 8 November 2026.

  3. CarExpert, "2026 Zeekr 009: Luxury EV people mover gets more affordable", https://www.carexpert.com.au/car-news/2026-zeekr-009-luxury-ev-people-mover-gets-more-affordable, accessed 8 November 2026.

  4. The Driven, "Zeekr delivers 1,000th unit of the highly popular 7X SUV, expands dealer network", 13 December 2025, https://thedriven.io/2025/12/13/zeekr-delivers-1000th-unit-of-the-highly-popular-7x-suv-expands-dealer-network/, accessed 8 November 2026.

  5. Zeekr Australia, "Zeekr 7X", https://www.zeekrlife.com/en-au/models/zeekr-7x, accessed 8 November 2026 (peak DC 450 kW on the RWD and 420 kW on the Long Range and AWD; Zeekr's own page and the press differ slightly).

  6. The Driven, "Zeekr delivers 1,000th unit of the highly popular 7X SUV, expands dealer network", 13 December 2025, https://thedriven.io/2025/12/13/zeekr-delivers-1000th-unit-of-the-highly-popular-7x-suv-expands-dealer-network/, accessed 8 November 2026 ("vehicle-to-load (V2L) capability with 3.3 kW output").

  7. RACV, "Guide to electric vehicle charging, plug types and cables", 5 February 2025, https://www.racv.com.au/royalauto/transport/electric-vehicles/electric-car-charging-plug-types, accessed 8 November 2026.

  8. Zeekr Australia, "New Zeekr X", https://www.zeekrlife.com/en-au/models/new-zeekr-x, accessed 8 November 2026 (search extract only; the page was not read directly, so treat the wording as not confirmed).