I need a dc output of 12V 60AH through 18650 li-ion battery cells to use with a 1000W AC inverter to power a 650 Watts computer ( each cell 3,7 Volts 3500 mAh )
One way would be make 17 packs in parallel ( each pack is 4 cells connected in series 4x3,7v=14,8 volts, 3500 mAh ) so the outcome would be 14,8 volts and 59,5 AH ( from total of 68 cells )
How about using a DC-DC step up converter? ( I know Boost converters are not 100% efficient )
Connecting 68 cells in parallel ( 68 x 3500 mAH = 238 AH and 3,7 Volts ) and using a DC-DC Step up converter to convert 3,7 to 12 volts? What is the downside?