A/B switch install

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offgrid
offgrid Registered Users Posts: 20
Could someone please provide suggestions or links for an install of an A/B switch ? I have 2 banks of 6 volt batteries (Trojans) on a 24 volt system.
Thanks !

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  • BB.
    BB. Super Moderators, Administrators Posts: 33,439 admin
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    Re: A/B switch install

    Are you looking for switches:

    Blue Sea Battery Switch 1-2-OFF 350 Amp $28.05
    wind-sun_2155_52854878 Blue Sea 9001e 350 Amp Battery Switch Make-before-break contact design allows switching between battery banks without power interruption Ignition protected - Safe for ... mounting Meets American Boat and Yacht Council (ABYC) requirements for battery switches 3/8"-16 tin-plated copper studs for maximum

    Or Lugs and a manual hammer crimper for the terminal ends:

    Hammer Crimp Tool for Large Terminal Lugs $27.50
    wind-sun_2155_12681909 This simple, inexpensive crimping tool can be used to crimp connectors on #8 through #4/0 AWG wire. Spring loaded pin locks in ... the pin holds the connector securely during crimping. Use with a hammer or vice. Though not quite as easy as the professional production ...

    wind-sun_2155_9205602#1/0 AWG x 3/8" stud ring connector tinned copper
    Regular Price: $1.50
    Our Sale Price: $1.00

    Or something else????

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • offgrid
    offgrid Registered Users Posts: 20
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    Re: A/B switch install

    Good morning Bill,

    I have purchased the A/B switch you posted from NAWS. I need to install it. I am looking for suggestions or links to do so.

    Thanks,
    Tom
  • BB.
    BB. Super Moderators, Administrators Posts: 33,439 admin
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    Re: A/B switch install

    I have posted links to lug ends and a hammer crimper (much better than soldering lugs onto cables).

    Are you looking for wire sizing? Or for suggestions like placing one fuse per battery string to protect the wiring against short circuits.

    Or help in finding appropriate fuses for your installation.

    One warning, those heavy cables are not very flexible--and using high-flex cables (like welding cables) have their own issues. The very fine wire cables which make them them Hi-Flex, also make it very difficult to find and terminate the proper ends on the cables (small wire has "lots of air gaps" and will not fit standard lugs for crimping).

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
  • silvertop
    silvertop Solar Expert Posts: 155 ✭✭✭✭✭
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    Re: A/B switch install

    The Blue Sea A/B switch is very solid I run two in my sys. and if I am correct I think they carry a lifetime guarantee.
  • BB.
    BB. Super Moderators, Administrators Posts: 33,439 admin
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    Re: A/B switch install

    Poster "2manytoyz" has some nice pictures of how he setup his smaller solar power system... Perhaps it will give you some ideas. Here is one set:

    http://2manytoyz.com/battbank.html

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset