During the development of the Lunar Exploration Light Rover, BRP, a subcontractor of the prime subcontractor, MacDonald, Dettwiler and Associates Ltd., created the SL-Commander. This all-terrain vehicle is an electric version of BRP's commercially available BRP Commander. It is fully automated and can be remotely operated to drive itself at a maximum speed of 40kph (24.85mph). The SL-Commander weighs 1,100kg (2,425 pounds) and can carry a payload of 200kg (440.9 pounds). (Source: Canadian Space Agency)
These CSA rovers are a long way past "proof of concept." The concept(s) has(have) already been proven by Curiosity. These are correctly named prototypes, but they're not production prototypes, the type ervin007 apparently is thinking of; they're R&D/engineering prototypes, to test different designs and paths to achieving the same goals. CSA joint tests them with NASA, just like they did the Canadarms, and NASA has the means to put these on the moon, on Mars or in space.
Researchers have been working on a number of alternative chemistries to lithium-ion for next-gen batteries, silicon-air among them. However, while the technology has been viewed as promising and cost-effective, to date researchers haven’t managed to develop a battery of this chemistry with a viable running time -- until now.
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