After being stuck in the high Sierras with a dead battery & no one to jump start me until a Ranger arrived, I decided to install a dual battery set up.
I decided on the T-max system as the price was pretty good (about $100) & it got some good reviews. I'd heard that you can squeeze 2 batteries into the spot where the current battery sits if you turn them sideways. That suited me as didn't want to run a cable all the way to the rear of the vehicle so that I could put the second battery there somewhere. So, I pulled the main battery out & started measuring for a new tray. Then I noticed that by my measurements the batteries would only overhang the end of the battery mount area by a couple of inches, so I figured I don't even need a battery tray.
I was looking at an Optima as my second battery but after reading lots of reviews (& because of battery size) I decided to get a Sears DieHard Platinum which I read is a re-branded Odyssy battery which are supposed to be excellent. Anyway, I bought some zinc battery terminals (supposedly 3x conductivity compared with OEM) & lowered the batteries into place.
They fit surprisingly tightly & don't move at all. Next came all the wiring, the T-Max solenoid is very easy to wire up it turned out to be the monitor/controller that was a pain in the rectum to wire. The kit comes with enough wire to reach comfortably from the passenger side of the dash out to the batteries on an R50. I had to remove the glove box to run the wires behind the dash & remove the passenger side kick panel & drill a hole through the metal between the door hinges in order to get the wires out of the cabin into the engine bay. There is already a small hole there but my 2 meter radio power wires were already using it. I took the wires from the hole between the hinges up under the fender & to the place where I'd located the solenoid.
The solenoid is very sturdy & well made, my only beef is that all the connections are exposed & I had a few spitzen sparken moments when I was connecting things & accidentally touched a terminal with a wrench or something. Of course I then figured out "maybe I should disconnect the wires from the batteries, wire up the solenoid, then reconnect the battery ends". :laugh: This worked well but I still coated the solenoid terminals with that liquid rubber stuff that you dip tool handles into, all the terminals are now nicely covered & insulated. I figure it's going to be a long time before I touch the wires & terminals again & if I need to then I'll just cut off the rubber (after disconnecting the batteries first this time!).
Ok, so after I connected all the wires from the monitor/controller I cut the appropriate lengths of 6 gauge wire to run from the batteries to the solenoid. All wire, connectors, fuses, etc, are supplied with the kit, they even give you a couple of battery terminals that I didn't use. I ran a new ground from the auxiliary battery to a good ground bolt that holds the lower hose to the block, reconnected my 2 meter radio, fridge/freezer power supply, etc, to the auxiliary battery (leaving enough available connections for a winch in the future) & fired her up!
The monitor/controller is great, it constantly gives you the charging rate of the main battery & indicates that the batteries are "linked" for charging.....
& at the press of a button gives you the charge rate & condition of both batteries.........
It also has a button that manually links the batteries if you need extra electrical power, this feature automatically switches off after 30 minutes but you can set it again if needed.
So far everything is working great. I cut a rubber mat to place over the top of the batteries & protect the terminals & temporarily rigged a tie down strap to hold the batteries in place, although as I said, they are pretty snug already. I'm going to make a metal tie down strap next weekend, but here's the finished product......
Sorry this write up is a little rushed but it's Friday night & my movie plus booze is crying out for it's pappa