I am replacing AGM 24v bank with LifePo and going about it backwards. Recently bought the boat, converting to live aboard/ sailing and will strive to minimize power consumption; I do not yet know what that will be. Freezer, Fridge, fans for Diesel heaters, lights, fans, water pumps, macerator, computer, nav equipment, kitchen appliances, Tool battery chargers and large amp pull infrequent use of windlass. 12v starting batteries are on separate system. Presently, outfitted with 6 flexible solar panels, MPPT, twin 80 amp alternators with Wakespeed alternator regulators, and a programmable battery charger: AGM/ Lifepo. Four LifePo 24v, 200 AH batteries will arrive next week. I will wire each side of each battery to a bus bar with equal length cables and from bus bar to battery switch to fuse to Main bus. Present bank wired with 1 AWG (four 6v 150 AH batteries wired in series) between batteries and to house bank main.
LifePo Batteries each rated for 200A continuous discharge and charge current, my present max charge capability is about 135 amps via combination of both alternators and will be adding a wind gererator.
Question: Cable size? Cable run is 1' battery to bus, 1' bus to main. I see varying reccomendations: 1 AWG for less than 5' run, and yet using a 24v wire sizing calculator: 24v - 200A - 1' run requires a 3/0 AWG cable. What say you?
LifePo Batteries each rated for 200A continuous discharge and charge current, my present max charge capability is about 135 amps via combination of both alternators and will be adding a wind gererator.
Question: Cable size? Cable run is 1' battery to bus, 1' bus to main. I see varying reccomendations: 1 AWG for less than 5' run, and yet using a 24v wire sizing calculator: 24v - 200A - 1' run requires a 3/0 AWG cable. What say you?