130 tub Deep cycle battery size and location

[Floydo]

Hi
Setting up my 130 tub for touring. Found a great location to mount the second battery, in the tub. I can fit a 90AH AGM deep cycle between the fuel filler and the tailgate. See photos. Will fit nicely under the side wings of the drawers.
Question??
1. Anyone see any issue mountings battery here, so close to the fuel filler?
2. Is 90AH big enough? I run a 85 litre Evakool fridge and some LED lights. Have a 120w solar panel on roof.

Appreciate the tips and advice guys.https://uploads.tapatalk-cdn.com/20210130/0ef09b2c625d64f79c1b0e4b026b0155.jpghttps://uploads.tapatalk-cdn.com/20210130/d36722735c63bc5c1f912369d0e711ff.jpg

[W&KO]

90 is a good starting point, plenty seem to get by with 100-110ah batteries.

If you happen to get a little low you can always top up with the charger under the bonnet.

What VSR are you using??

[Floydo]

Not sure, any recommendations for VSR

[W&KO]

Not sure, any recommendations for VSR

I was running a basic redarc....... Dual Sensing Smart Start Battery Isolator 12V 100A | REDARC Electronics (https://www.redarc.com.au/dual-sense-smart-start-sbi-12v-100a) perfect if you prefer to leave your starter alone. It also allows solar charge back tjm your starter. No issues and had enough battery capacity to run fridge.

Now run a DC-DC in the defender.

Thread will be flooded with posts on another solution, I changed away to the redarc when I was running an AGM as AUX.

[MLD]

i went to the expense of fabricating a squared off box to replace the base of the battery box. Fits the OEM D130 battery (larger than OEM found in D110) and a 100ah aux (marine) with the traxide solenoid with room to spare. I like the idea of having the 2 batteries close together. Saves running oversized cable for long lengths to the back of the car for the Aux battery and when winching the draw from the aux battery doesn't have to travel long lengths. If you set up yours in the location suggested in a dual battery config, spend the money on oversized cable. Will keep the charge up to your Aux.

as for size, i can run my 52ltr fridge, camp lights etc for 3 days on the 2 batteries (no solar or running engine to recharge). Depending on weather and current draw, it gets a bit iffy in the 4th day. 90ah should give you good service unless you are a heavy user and/or set up for long periods without driving.

[Floydo]

Thanks guys for the replies. Manage to find a 120AH to fit the gap. I had the battery in the tub of my old ute. Worked fine, don't do alot of winching. I ran thick battery cables 8 guage ? , never had a problem running the old engel even in the Simpson.

[MLD]

I ran thick battery cables 8 guage ? , never had a problem running the old engel even in the Simpson.

8 gauge is 56amp. Personally i'd be looking at fitting 25mm2 or 2 gauge. Voltage drop, resistance etc over long runs warrants larger cable. Can never be too big, can be too small. 56amp will carry the draw of the fridge (about 5 to 6amps on start up of compressor, settles to about 1.5amp thereafter) and LED lights are about 0.5amp p/h but its the recharge from the primary battery/alternator that you want large cables for. Your aux battery will stay healthier for longer if you set up the system with no restrictions. Buy lengths of welding cable, its cheaper per m than going to Jaycar or a Repco.

[Floydo]

Thanks MLD, for the advice on the welding cable. It's heaps cheaper and can handle more amps