Under bonnet Deep Cycle battery??

[10G]

Ok, I'm looking for a deep cycle battery that is happy to be installed under the bonnet.

Any recommendations???

[MudRunnerTD]

I have run Optima under the bonnet for 10+ years. first set i got 7 years out of. i then went GEL batteries and killed 2 sets in a year all replaced under warranty. Finally i went back to Optima at no extra charge from my Battery guy as a warranty swap. Never looked back.

[10G]

What model & colour Daz???

[MudRunnerTD]

I have a pair of D31a under the bonnet. I run a single D34 in the GQ and a pair of Red Top R34 in the back of the GQ running 24v

[Rossco]

Just picked up a couple of D27F yellow tops pretty much the standard 300mm x 180 ish and fit in GQ no probs. . 830 CCA and 66AH. .http://www.nissanpatrol.com.au/forums/images/imported/2021/02/177.jpghttp://www.nissanpatrol.com.au/forums/images/imported/2021/02/178.jpg

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[FNQGU]

Love the Optima's but the only drama is the lack of available Amp Hours if you want a dedicated 'deep cycle'.

I ended up with a compromise for my second 'house' battery under the bonnet which is a calcium and had 97Ahrs from memory. It wasn't anything flash and my main house battery is still the same 120Ahr Full River AGM that lives under the canopy away from the heat of the engine bay.

When I win the lotto I might fork out for a single Lithium behind the back seat and ditch the weight of two batteries, but that might be a while off...

[Rossco]

Yeah was seriously toying with the idea of going lithium but weighed it up for needs of running accesories vs winching and usually short term camp setups. . Yeah same probably go that way one day lol. . .

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[Yeti's Beast]

Pretty sure that Lithium isn’t suitable for winching. The load is too much for the bms


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[MB]

Optima D27’s Yellow pairs (800 CCA - 66 AH) have never let me down under bonnet with hotter running GU TD42’s & a 6.5 Chev stinker for shorter stays and winching.
Extremely fast charge recovery and half the amount of internal connections to the spiral 6 pot design versus standard 12 plate battery designs.
I think some Odyssey batteries might have epoxy filled tops or bottoms to vibration protect the standard plate connections which would be good too I imagine.
Just managed to barely squeeze an Optima D31 Yellow (900 CCA - 75 AH) into the GQ ute which is getting connected to a DC/DC thingy and off to a Kickass (AGM 170 AH) on the tray headboard with solar above, fingers crossed [emoji1696]
Must say the extra 100 CCA of the D31 gets the starter motor cranking off its head, looking forward to winch tests on build completion soon hopefully [emoji120]


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[Yeti's Beast]

I have a stand alone solar set up in the back of the ute and I recently put a D31 in there to run the fridge.
Now my reasoning is this for my choice of weapon.
As some may know I work with batteries and have all the lollies in the world to choose from but the Optima ticked all the box’s except for ah capacity but like MB said they have extremely low internal resistance which allows super fast recharging and if needed I can start off it or run high amp accessories like compressors etc.
I did have a big solar panel and a 110 ah Agm which worked flawlessly but I decided to go down to a 115watt Victron panel and to make sure it’s matched to the appropriate size battery I figured the D31 was best for my situation and this is the key to everyone’s decisions, choose batteries etc that suit your needs, not just what you’ve heard all of us say.
I was given a brand new Lithium 110 ah from the boss last night to test out.
Now Lithium is also a great concept but not for everyone as they have a built in battery management system.
Depending on the grade of the cells and BMS, some can only handle a small load and others up to 110 amps.
Cheap ones have low rated BMS, put an inverter on them and they are useless.
Do your homework
With lithium, check the C rating.
.3 C = 30 amps
.5C = 50 amps
1C = 100 amps and so on
Anyway my fingers are numb now from all the typing on my phone.
Cheers


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[VK2FMIA]

Been using a Century N70T Deep Cycle Flooded (100 ah) for years without any problems.

[10G]

Thanks everyone for the info.

I'm looking for something that can live under the bonnet and give me at least 100Ah. I had 2 new Supercharge batteries, one dropped a cell about 2 weeks after we got back from our bone jarring Surveyor Generals Corner trip.

I have room for a battery in the cabin, but I'm trying to remove the single point of failure of having a single starter battery. If I can find something that will live under the bonnet on the passenger's side, it'd be a simple job of swapping batteries around should the crank battery die.

I've gone off Supercharge, I've never had battery issues, but after mine died I've read several other people who have had exactly the same problem.

[10G]

What about the Century Overlander 4x4 wet cell. It has 735 CCAs, 100Ah and fits in the spot it needs to fit. 36 month warranty.

[MudRunnerTD]

Thanks everyone for the info.

I'm looking for something that can live under the bonnet and give me at least 100Ah. I had 2 new Supercharge batteries, one dropped a cell about 2 weeks after we got back from our bone jarring Surveyor Generals Corner trip.

I have room for a battery in the cabin, but I'm trying to remove the single point of failure of having a single starter battery. If I can find something that will live under the bonnet on the passenger's side, it'd be a simple job of swapping batteries around should the crank battery die.

I've gone off Supercharge, I've never had battery issues, but after mine died I've read several other people who have had exactly the same problem.

Yeah I had thr Optima for 7 years under the bonnet without fault. The 2 batteries died 2 months apart which is also a great result IMO.

I went to AGMs for thr 120 AH and thought that's the go!! The first set lasted 4 months or so then the replacement set about a month. As stated above I went back to Optimas.

The Optimas have never let me down and I have never run out of AH either. The recharge rate is far superior to normal batteries so if you need to run the car an hour or so to recharge then that's OK. Also they will take charge from solar that much easier too.

To be honest I can't fault them. And, to read the Yeti runs Optima as his personal choice with access to Anything is probably the biggest Tick you need.

[Yeti's Beast]

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[10G]

Yep, I've only ever heard good things about Optimas over many many years.

Hey Yeti's Beast just wondering what the felling is with Century's though. Are they still any good??? The Century Overlander 4x4 has all the right stuff on paper & half the price (maybe not as good as the Optima??) of the Optima.

[Truckus]

Yep, I've only ever heard good things about Optimas over many many years.

Hey Yeti's Beast just wondering what the felling is with Century's though. Are they still any good??? The Century Overlander 4x4 has all the right stuff on paper & half the price (maybe not as good as the Optima??) of the Optima.

Yep, thats what Truckus runs for both cranking, and accessories battery. He has the secondary/accessories battery in an under-body box (sits inboard of rock sliders under rear LHS seats) and feed from a redarc isolator that is the standard set up Brunswick Diesels uses in their conversions. (this is the set up for solid voltage alternators, smart alts in later vehicles need a different isolator charging arrangement.)

A ball ache to access (you got to remove the carrier tray that is under-slung for battery removal, so glad we got a battery that requires minimal maintenance. This battery supplies all my accessories, like lights, compressor, winch, UHF, fridge power and 12 V outlet, etc, and I will be looking at an alternate set up (as in relocating that battery in the future once I finished building the full 12 V distribution system and they will have additional twin deep cycle 100 AMP hour minimum cycles set up for the 12 V and manager 30 A system with the sine wave inverter (1000W)..but thats still a work in progress

This is a handy link for the vehicle accessories battery https://www.centurybatteries.com.au/products/4x4-suv-batteries so figure how much room you have and what load you need to select the right one. Trukus uses these ones https://www.centurybatteries.com.au/resources/battery-finder/product/battery/n70zzxhd/info

and the ones I am looking at for the camping appliances 12 V and inverter set up will be Deep Cycle AGM Range https://www.centurybatteries.com.au/resources/battery-finder/product/battery/c12-105xda/info

Anyhow, probably too much info, but I tried to keep it basic, in case you then want to tie in a 12 V system later, that can also alt charge from driving, mains charge, and solar charge.

[10G]

Thanks for all the info Truckus, much appreciated.

[Yeti's Beast]

Yep, I've only ever heard good things about Optimas over many many years.

Hey Yeti's Beast just wondering what the felling is with Century's though. Are they still any good??? The Century Overlander 4x4 has all the right stuff on paper & half the price (maybe not as good as the Optima??) of the Optima.

I’ve found that most batteries in a price bracket are similar in quality, warranty etc
Once you move up in cost the quality also usually ( note usually ) improves.
Keep in mind that Exide, Marshall, Supercharge and Lion batteries are all owned by the same company these days.
Century is the only Australian automotive battery made here in Brisbane, but not all sizes. Check the batteries for country of origin.
Dekka is another good under bonnet AGM deep cycle battery.

https://www.outbackmarine.com.au/energy-storage/agm-batteries/deka-intimidator-dual-purpose-agm-batteries/

Price wise they are up with the Optima


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[10G]

Thanks YB, I appreciate the advice.