Japan website list PTC option (pack temp control) ? 5kw

[LakeLeaf]

That's so it can heat the water quickly

This thing comes with a built in espresso maker too?

[smkettner]

5 kw, 17,000 BTU? That still seems huge.

[TRONZ]

Hummmmm?!?

[garygid]

So, is it just a 13-amp load (approx.) switched on and off quickly to give a "low-heat" setting, or are there several (many) 500-watt "Resistors" (heating elements), with sometimes many and sometimes fewer "connected" to the traction battery to provide the variable-heating power needed?

[GroundLoop]

Given the fluid buffer, it wouldn't have to switch that quickly to keep a stable temperature.

[garygid]

From the Service Manual, apparently the Heater Controll switches the heater current On/Off quickly (PWM), powering just "one" heating element.

[kmp647]

Finally found out what PTC stands for. Positive temperature coefficient

It is a ceramic type electric heater element
Uses no water it element to air

Lexus uses them in 2 models to provide cabin heat before the ICE warms up

They put this secondary heater element on top of the water heater core unit and put 12v thru it to provide 500 watts of heat to the cabin/windshield def

Uses a honeycomb material

So seeing that the cold package on the japan website list: heated steering wheel (nice)
Heated seats, heated REAR seat cushion, and 5kw PTC

Maybe a totally different heater , no water based system

Be nice if we could get some real info from Nissan

[AndyH]

Finally found out what PTC stands for. Positive temperature coefficient

It is a ceramic type electric heater element
Uses no water it element to air
<snip>

Sorry kmp647 - Groundloop nailed it in post #2. It's not the battery heater, and not a ceramic air heater.

Service Manual, HA (heating and AC), page 66:


An earlier schematic shows four computer-controlled heating elements inside the water heater box.