Battery Tie down methods in 3rd row seat well

[Glennie]

G'Day Fellow Mitsubishians,
I have been searching but being a Klutz I have had difficulty locating the information I need on the forum.
I have an Optima D34 Yellowtop in an ARB tray in the engine compartment which suited my needs in that I drove most days which would keep the battery charged enough to run my Waeco fridge. My Driving/holiday style has changed somewhat now and I find myself staying more frequently in the one spot for more that 24 hours. The Optima doesn't really have enough capacity for this so I am thinking Of replacing it with something like a Fullriver 105 A/Hr AGM or larger and shifting the auxiliary battery position to the rear seat well. Question is, What is the best way to tie it down? Battery tray and tie-down bolts, bolted throught the bottom of rear seat well? Also where to bring the cables into the well?
Regards,
Glennie

[dolphin]

i would be going through the floor with some nice stainless bolts long enough to fit the normal brace over the battery like in the engine compartment. this way you know nothing will break and just remember the fuel tank is very close to where your wanting to place the battery so this is the safer way to fix the battery i feel. wherever you decide to run the leads just make sure you fit fuseable links at each end of the positive lead, just another safetly feature.

[NFT5]

Faced with a similar predicament, rather than put the long bolts through the floor I have planned on a loop welded to a plate with the plate bolted through the floor and then plated on the outside as well to spread the load. I've prepared plates that are 75x75x3mm - should be plenty strong enough. The loop on the top allows the normal hooked rod to be used to retain the frame that sits over the top of the battery. Doesn't have to be done up all that tight - don't want to damage the battery.

[Glennie]

i would be going through the floor with some nice stainless bolts long enough to fit the normal brace over the battery like in the engine compartment. this way you know nothing will break and just remember the fuel tank is very close to where your wanting to place the battery so this is the safer way to fix the battery i feel. wherever you decide to run the leads just make sure you fit fuseable links at each end of the positive lead, just another safetly feature.

Thanks Dolphin, good point about the fuseable liinks.

[Glennie]

Faced with a similar predicament, rather than put the long bolts through the floor I have planned on a loop welded to a plate with the plate bolted through the floor and then plated on the outside as well to spread the load. I've prepared plates that are 75x75x3mm - should be plenty strong enough. The loop on the top allows the normal hooked rod to be used to retain the frame that sits over the top of the battery. Doesn't have to be done up all that tight - don't want to damage the battery.

Thanks too, NFT5,
I think your idea of spreading the load with plates both top and bottom is great. I will utilize your suggestion. Another thought, if I fitted an Auxiliary tank at some time in the future, would these bolts cause any clearance problems with the top of the tank? Assuming 51 litre LRA tank on NT with rear air-conditioning.