Join Date: May 2018
Location: Norco, California, USA
I did do my check ride at night (wasn't supposed to, but did) and didn't see the lines.
I focus very far way. So much like a dashcam, the wires don't show. But after I went to actively look for them, then I focused up close, and voila, I saw something I would not have intentionally ordered.
But there's a story here, and some clever engineering for the US (perhaps other markets too).
The FMVSS (Federal equipment safety regs) now requires the windshield be clear in X minutes when fogged up and cold. This is a problem for EVs. To defrost a window on the inside, you need dry air. That is air conditioned air. And you need heat to dissolve the water. So with an EV that has just a AC unit, you need to have a resistance heater and blower to warm the AC air that defogs your windshield. This is a big waste of energy. The I-Pace has a Heat Pump IIRC, which can either create cold dry air, or warm air but not both. Other EVs with heat pumps use a resistive heater and the heat pump to defog. But the I-Pace can use less power to do the same job by just heating the glass itself, which negates the need for dry air. The Heat Pump is now allowed to heat your cabin if you wish (and it is efficient at it) and the resistive glass heater uses far less power than an electric cabin heater.
So those little wires allow your car get warm quicker and use less power to do it. A byproduct is the cabin heater is more efficient also when defrosting/defogging is not an issue.
Jaguar i-Pace FE Photon Red 20" wheels, "Leaper"
Two Chevrolet Volts in service
24.2 kW x 480v 3ph solar array self-installed.
Last edited by McRat; 01-12-2019 at 08:30 AM.