GTS,

... UTS did actually have aero...
Oops! Yes, UTS has an undertray++. I recall looking at it when it was up on a table with its battery removed (by dropping it through the floor), so its undertray and sidepods, etc., were also off.

A big aero-undertray is definitely the way to go for E-cars. Much to be gained from this route, with potentially very high DF and low drag on offer. UTS achieved its 2nd-place overall in the E-class largely due to its very good "Fuel-Efficiency" result.
~o0o~

Also worth mentioning that RMIT's E-car, #E88, the usual winner of the E-class for the past several years here in Oz, was this year perhaps a bit TOO OPTIMISED, at least in terms of battery capacity.

Corrections welcome here, but it seems that this year's Enduro was stretched out from the usual 22 kilometres, to 20 laps x 1.2 kms = a total of 24 kms. And just as #E88 started its final lap its battery cried "Enough!". The car sat there for ~2+ minutes, until the battery was somehow persuaded to put in that last little effort, and it eventually completed Enduro. Most of #88's lap-times were very similar to Monash's E-car #E65, roughly 1:15s to 1:25s, but its last lap of 3.33s cost it a lot.

Ahh yes, for some reason the real-world "Costs", in Cost-Benefit-Analyses, can end up being much higher than the hoped-for "Benefits".

Z