I have a suggestion for an alternative method of producing Tritium:
Have the lithium cells if placed inside a fission reactor convert into tritium and helium cells after a certain time (http://en.wikipedia.org/wiki/Tritium). you could also somehow put lithium cells near the fusion reactor (like the proposed lithium blanket on the ITER), which should produce considerable neutron radiation.
This would make the tritium production a bit more realistic, it will also give higher incentive to run a fission reactor for a while beforehand to get then initial energy for the fusion reactor.
(and less incentive to use those silly compact solar things that make absolutely no sense, the power per square meter should be almost fixed, so how do you get a panel to produce 512x the already effecientish one?)