I was assuming 3000 cycles at 60% depth of discharge, which is what typical modern Li-Ion battery does, and an equivalent of 1800 full cycles. 129MWH over 1800

I was assuming 3000 cycles at 60% depth of discharge, which is what typical modern Li-Ion battery does, and an equivalent of 1800 full cycles. 129MWH over 1800 cycles is 232GWh, which is for $50M = $0.215 per KWh.