Forget the kilotank, let's do the 3 kilo tank with a trailer
 

I've been using my volt for everything since since I've moved out, no other cars to work with. Meaning that it'll do commuting, charge at work, and then run errands. on good months, I'm looking at 90% EV miles. Meaning that I can stretch a tank of gas 3000 miles or until I have to drive halfway across the state. Gas is 9-12 cents a mile here, off peak electric is 1.5-2.5 cents per mile.

Instead of buying another car for towing, I just tossed/am tossing a hitch onto my volt and tossed a portable AC unit into my garage so I could work on the car in the summer. (Yes, I know this is rather excessive, but I can either pay the heat tax on my electric bill or I can pay it with my health-- kilowatts are cheaper).

An added bonus of having a PHEV? The garage has never seen a drop of gasoline burnt in it the whole time I've been at this house.

What sort of trailer are you contemplating? Type I or II reciever hitch?

Will the trailer tilt toward payload or aerodynamic benefit? APU?

Payload, type I. Right now my house is a single car household.

My wifes car will 1,000km if we just drive the speed limit.

Always go class 3 hitch or greater. There's hardly any difference in price.

Standardize on the 2" hitch so you don't have to monkey around with different pins and balls.

I put a class 3 on my Prius, and it's rated to tow nothing. I hauled a yard of dirt with it, and regularly pulled a jet ski. I've got a class 3 on my company CX-5.

I'm running a 2" ball but they only make class I and Ii and the class ii is 3 times the cost.

Wow, that surprises me. The Volt is rated to tow a ton, so I figured there would certainly be Class III hitches. Torklift doesn't even have a 2" receiver for it.

Plenty of options out there for a Prius, even though it has no tow rating. Figured if a Prius has options, the Volt certainly would.

Part of the rating is tongue weight. Perhaps the hitch manufacturer doesnt think Volts can carry extra 200 lbs on the rear springs with full laden weight.