Lifeboat Foundation

A 100 meter to 150 meter solar array that is attuned to the lithium ion will be about 70% efficient.

JPL is working on the gridded lithium ion arrays to achieve 60,000 ISP.

There is work on 60 meter deployable solar arrays.

This system will achieve a speed of about 260 kilometers per second (almost 0.01% of light speed) and enable the fast 10–12 year mission to 500 AU gravitational lens and manned missions to Jupiter in 1 year travel time.