second battery

[sean]

I

[Barry]

If it were me I'd use a 1,2,Both battery switch. It gives more flexability to the sysytem. The way your proposing to do it if the service battery drains down it'll draw off the start batt. Or vice versa.

With a 3 way switch you'll be able to isolate either batt or run them in paralell for those really cold mornings! Plus you'll be able to recharge a flat batt whilst running much quicker having just one batt on line.

 

It seems that most, if not all, builders do it this way so something must make sense. Keep the cables as short as poss with good soldered joints and good quality cables. All should be fine.

[Newboy]

If you do a search on battery wiring, this topic comes up fairly frequent. As Barry said, a 3 way switch is the way to go and the cost is about

[Paul D]

Kam,

 

Way to fast for me, I was just checking a search on battery would do the job !!

 

Here