dual battery switches need help........
Submitted by streaker boy on Wed, 2009-09-30 16:23
after some info on dual battery switches ..... currently got a BEP switch and rated to 200 amps continous ... can any1 tell me what difference is if i was to get one about 300 to 350 amps continuous???
im finding my anchor winch drains alot of power and slows down ( brand new south pacific 700 f ) so will a 300 or 350 amps help it or ill be wasting my money? and the batteries are fine thats not the problem... matt do you know or any1 else.......... thanx azza
Andy
Posts: 522
Date Joined: 08/10/05
Lead
Wat size lead in running from the battery to the switch and from the switch to the winch. i doubt the iso switch will make a difference and the winch wont be drawing anywhere near 200 amps.
just dhu it
Posts: 1081
Date Joined: 14/05/09
power rate
streaker , your winch is going slow probably because the cable running from your batteries to the control panel on your dash is only good for 30 amps on and off etc , it would be best to check your winch motor and it should be stamped what the amps are, yes the bigger switch 350 amps would be better as your batteries should be 300 to 400 cca rating and the switch should match this. most boat companys only allow for a radio and lights etc from the control panel, hence the small cable, which doesnt allow for gps , vhf and echo sounders running all the time , thats why some of these units will drop out when starting your motor, i would connect the winch straight to your batteries or upgrade the cabling supply to your control panel
streaker boy
Posts: 527
Date Joined: 23/05/09
the leads from batteries
the leads from batteries to switch are pretty big no problem there..... and the cables from winch to switch is about 11AWG........
streaker boy
Posts: 527
Date Joined: 23/05/09
so u say to run the winch
so u say to run the winch straight to the batteries or just one? if so can u run it so it runs of the 2 batteries without the switch..... also i had an older model of these winches i replaced it with a new one from power out to free fall and i left the same switch and circuit breaker in i t so wouldnt have 2 cut out more holes in the dash only thing was the circuit breaks were rated different the old breaker i left in the boat was 20amps and the newer one was 30 amps but that shouldnt make a difference is it only acts like a fuse??????
streaker boy
Posts: 527
Date Joined: 23/05/09
also in boat i run raymarine
also in boat i run raymarine A65 fishfinder gps combo, cb radio, navman sounder which dont really use, nav lights, two hella led deck lights and the winch......
streaker boy
Posts: 527
Date Joined: 23/05/09
the winch is rated at
the winch is rated at this
Comparable Model
300W Model
Input Voltage
12V DC
.
Continuous working time
15 min.
Current Draw
12Amp
Motor Type
Permanent magnet
Motor Wattage I/O
700W/300W
just dhu it
Posts: 1081
Date Joined: 14/05/09
cables
the switch on the battery can select battery 1 , 2 or both batterys, if you run a extra large lead to the dash switch just for the winch only and then connect the red to the battery switch common, same place as the dash supply wiring , that way it will still work when on battery 1 or 2 or both, also do you run your motor when winching as this would help with volt drop and better for the winch
streaker boy
Posts: 527
Date Joined: 23/05/09
yes always have motor
yes always have motor running and on both batteries when using the winch
just dhu it
Posts: 1081
Date Joined: 14/05/09
current draw
okay , to work out the current draw , devide the total wattage into the volts 300 watts over 12 volts = 25amps 700 watts 59 amps , another issue that affects this is the length of cable which causes the volt drop, and operation times , cables hate heat, you do need the 30 switch in case and you should have at least a 80 amp cable to your switch to prevent drop outs on your other gear
streaker boy
Posts: 527
Date Joined: 23/05/09
ok sweet looks like ill
ok sweet looks like ill change the cables so 80 amp do you no about what AWG that would be or in mm ?
just dhu it
Posts: 1081
Date Joined: 14/05/09
cables
dont know of the top of my head will check out and let you know tomorrow, unless you know a auto sparky.
kaneo
Posts: 340
Date Joined: 09/01/08
average boats run 4mm
average boats run 4mm ,winches n radar they usally run 6mm,$4.50m
streaker boy
Posts: 527
Date Joined: 23/05/09
i looked at mine last
i looked at mine last night it has 4.58mm2 cable and found that it needs atleast 8.36mm2 cable in the cross sectional area ..... so if i can get wire to into the plugs i got for it ill try and get the 10mm2 or even better 13m2 wire and hopefully that should fix my problem...... ill put a link up so u can see the wire chart conrverter i found ...
http://www.reuk.co.uk/AWG-to-Square-mm-Wire-Size-Converter.htm