Table IX-2 Energy Payback 10 GW SPS The SPS produces 8.1 X 10 0 KW/HRS per year; consequently, the 6.7 X 10^0 KW/HRS used in implementation of the SPS would be generated or "paid back" in less than ten months. This figure compares favorably with estimates for conventional ground systems which range from 0.2 to 1.0 year for payback.
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