The fusion rate in the sun is VERY SLOW - in the core the energy production is well under 1kW per cubic metre. To get the fusion rate up to something the is useful for a human power plant, two things are needed
(1) Deuterium instead of ordinary hydrogen and (2) much higher temperatures than in the core of the sun.
(Low temperature fusion is possible but all efforts to date consume far more energy than they produce - see the fusor and muon catalysed fusion for examples.)
Biting the hand that feeds IT
