Quote:
Originally Posted by hayden55
i would need to see a further explanation on this. I could blast something with energy to charge it faster but it will overheat. Theres a reason why wires are rated for amps and temps not voltages. (*to a certain point, the HV stuff just gets into safety issues around people and arcs, not dealing with the energy and heat side)
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Faster charging makes a big difference when charging in cold weather.
If the battery is cold the car will run the heater and circulate coolant to warm the battery so it can be charged safely. On a typical 120V / 12 amp circuit you can use the majority of the electricity provided just to keep the battery warm enough. If you are using 1 kW to heat the battery that only leaves 0.4 kW to charge. The charge takes forever and wastes a lot of electricity. Jump to 11 kW and 1 kW to heat is a small fraction of the energy and the charge time is near normal.