Dual bettery isolator QUESTIION

**omlax19** · 05-19-2004, 06:05 PM

the wire to the second battery does it matter how long it is would it still charge right if the 2nd battery was in the trunk

**Kermee** · 05-19-2004, 07:52 PM

Keep it as short as possible. Heat/fire is your #1 enemy in running a hot-wire to the trunk. Depending on your alternator and how much you are going to discharge your aux battery, you might need anywhere from 0 gauge to 8 gauge power-wire. Put in a fuse between the output of the isolator to the second battery, within 6" of the isolator, and you should be okay.

Hope this helps.

**omlax19** · 05-19-2004, 11:26 PM

thanks alot

**gospeed.racer** · 05-19-2004, 11:31 PM

Actually I would go one step further. Fuse the secondary battery within a few inches also, so no matter if the main wire shorts, the batteries are both protected. Two fuses are cheaper than a fire any day!