KillaWhat wrote:Was talking to a guy with a Fisker Karma this weekend, and noticed his entire roof (fairly big roof) appeared to be all solar cells.
Anybody know anything about that?
JeremyW wrote:The fisker karma roof charges the aux battery as far as I know (read or heard that somewhere don't remember where...).
mwalsh wrote:The primary function of the Fisker's roof was to run the climate control. But it did put power into the battery pack, giving a theoretical 1 mile of range for every day in full sun.
Yes, I discussed the PV on the roof of a Karma with an owner also on Saturday, as well. Here is what I learned:
- The PV array on the top of the Karma looks really cool (like everything else on that car!).
- I counted the cells. There are 80. If they are all in series, that would give a peak power voltage (Vpp) of about 50V. As such, to run the 12V systems, there would either need to be a buck converter in place or this is one inefficient PV system which would massively overcharge the battery when full.
- As mwalsh said, owner said many believed it was to run the climate control system on hot days to cool the interior.
- Owner said he has never seen the climate control come on and he did not know how to enable it.
Regarding the LEAF PV array: IIRC, we have at least one report of a LEAF SL 12V battery going dead while it was parked outside.