Which AGM Battery?

Hi everyone,

I am looking for a replacement deep cycle battery for my trailer.
It will be mainly used to power my WAECO 80Litre fridge at home and away.
I have a C-Tek MXS 10 charger (10 Amp charger) previous battery was 110A/H and lasted 3yrs 1month.
Looking for comments regarding good quality against reasonable pricing.

Cheers

Rob
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Reply By: bluefella - Monday, Apr 14, 2014 at 21:46

Monday, Apr 14, 2014 at 21:46
I like Century.
AnswerID: 530566

Reply By: Mick O - Monday, Apr 14, 2014 at 21:53

Monday, Apr 14, 2014 at 21:53
Very happy with my 2 x 140 A/H Powersonic. Good range and a variety of footprints so you can fit them into a wider variety of spaces. I run the Engel 80l Combo. I'd suggest you get as bigger battery as you can fit or afford. An 80 litre fridge is asking a lot of a 110AH battery.

Cheers Mick
''We knew from the experience of well-known travelers that the
trip would doubtless be attended with much hardship.''
Richard Maurice - 1903

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AnswerID: 530568

Follow Up By: ian.g - Tuesday, Apr 15, 2014 at 11:10

Tuesday, Apr 15, 2014 at 11:10
X 2 For Powersonic, very good battery, but not the cheapest, very heavy battery which can only mean good insides.
Regards
Ian
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Follow Up By: Mick O - Tuesday, Apr 15, 2014 at 12:00

Tuesday, Apr 15, 2014 at 12:00
I note they've gotten a fair bit cheaper over the past four years, especially after the Free Trade deal with the US. Mine were better than $500 each (trade!) back in 2010 and now they are not much more than $300. Hopefully they'll be worth tuppence when I come to replace mine around 2024 or so ;-)

Cheers

''We knew from the experience of well-known travelers that the
trip would doubtless be attended with much hardship.''
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Follow Up By: ROBBS GONE BUSH - Tuesday, Apr 15, 2014 at 21:53

Tuesday, Apr 15, 2014 at 21:53
Hi Mick,

Just wondering what type and and amperage charger you have to charge the two batteries.

Do i really need two batteries?
My battery box is mounted inside my POD trailer, in your opinion what size single battery do you recommend or are you firm on two batteries?
Have you done any calculations on current draw as i have not?
I do not use freezing in the Waeco as i take vacuum sealed meat so current draw will be down for fridge only.

cheers Rob
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Follow Up By: Bob Y. - Qld - Wednesday, Apr 16, 2014 at 10:29

Wednesday, Apr 16, 2014 at 10:29
Rob,

Trouble with one BIG battery is the weight. If you have to move it at all, you're heading for double hernia country!

I've got 2 Powersonic 120 amphr batteries in my camper and hope I don't have to move them too often. Think your problem would be the Waeco would drain nearly 50% of battery capacity each day, requiring some impressive recharging ability.

Wouldn't go below a 15 amp mains charger, preferably 25 amp.

Bob

Seen it all, Done it all.
Can't remember most of it.

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Follow Up By: ROBBS GONE BUSH - Wednesday, Apr 16, 2014 at 21:38

Wednesday, Apr 16, 2014 at 21:38
Hi Bob,

That is bad news to me as i recently purchased a new C-Tek MXS10 (10Amp) charger thinking this would be a good size charger. So are you saying that if i use 50% of a 120 amphr battery, to recharge the 60 amps back to 120 amps it will take me 6 hrs with a 10 amp charger?
Oh well !!

Rob

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FollowupID: 813652

Follow Up By: Mick O - Thursday, Apr 17, 2014 at 09:17

Thursday, Apr 17, 2014 at 09:17
Rob,

it's probably more a case of you knowing how you use your fridge and what draw it has. Also, if you are stationary for days ti will drain the batteries. Batteries of any variety will degrade once the are discharged past certain limits so we always aim to keep our batteries as topped up as possible. The more battery storage capacity you have, the more you can use without causing harm to your batteries. The fact that you only got 3.5 years out of an AGM battery would probably be an indication tat you are not charging it appropriately or you are cycling it excessively leading to degradation and final collapse.

My AGM's are 4.5 years old and going strong because I charge them correctly, try and maintain them to 100% charged as I can and carefully manage my power draw while stationary. There is the misconception around that you can run your batteries flat with the fridge and then just top them up again and all will be OK. This will kill your battery in no time flat, AGM or not.

I use Redarc BMS system over my two auxiliaries. This would probably be a bit of overkill in your situation so I would suggest the Redarc BC-DC 12/25 or 12/40. Mounted with your battery it will ensure that it is charged in the appropriate manner an AGM should be charged. Will also take solar input as well as it has an inbuilt MMPT solar controller..

Redarc BCDC

Hope that helps.

Mick
''We knew from the experience of well-known travelers that the
trip would doubtless be attended with much hardship.''
Richard Maurice - 1903

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Reply By: Member -Toonfish - Monday, Apr 14, 2014 at 21:57

Monday, Apr 14, 2014 at 21:57
10amp is a minimum charge rate for a battery that size but for cycles I reckon youcan go past a fullriver agm I don't think the gel is worth the extra dough .
I have had mine over 3 years still going strong im guessing at least 250 cycles so far and last test was still 93 % give or take .
2013/14 around oz adventure bound

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AnswerID: 530569

Reply By: Alloy c/t - Tuesday, Apr 15, 2014 at 09:28

Tuesday, Apr 15, 2014 at 09:28
Fullriver is the go , I still have one that I bought in dec 2002 ,,,, still going strong , has /was always charged when on mains by Ctec MS7 , travelling by vehicle alternator + solar when camped [steca 25] ……… records kept over the years show that the 80 lt Waeco [2002 model] uses 64amp hrs per 24 hrs when used as fridge/ freezer compartment set at -18 …….
AnswerID: 530591

Follow Up By: ROBBS GONE BUSH - Tuesday, Apr 15, 2014 at 22:07

Tuesday, Apr 15, 2014 at 22:07
Hi Alloy c/t,

I have never used my WAECO lower than -10 and it was freezing everything in the freezer compartment.
Is there a reason for using -18, like very high ambient temperature in the outback?
What size battery do you use and if you have no 240V power how long can you camp before battery goes dead?
How long does charger take to fully charge again.

Cheers Rob
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FollowupID: 813592

Reply By: Dennis Ellery - Tuesday, Apr 15, 2014 at 12:31

Tuesday, Apr 15, 2014 at 12:31
I had a Fullriver 100Ah – very good - after 6 years still had full capacity on a 20 hr load test.
I would still have it now but I needed one that could be fully charged from flat in about 2 hours.
Now have a Lifeline which is top of the range but expensive.
AnswerID: 530600

Follow Up By: sweetwill - Wednesday, Apr 16, 2014 at 08:17

Wednesday, Apr 16, 2014 at 08:17
My two lifeline batts, were one year old when I bought them, they a are now seven years old and still going strong.
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Follow Up By: Dennis Ellery - Wednesday, Apr 16, 2014 at 11:07

Wednesday, Apr 16, 2014 at 11:07
Lifeline are very cost effective – they have 2 to 3 times the cycle life of most others.
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FollowupID: 813611

Reply By: Mike P4 - Saturday, Apr 19, 2014 at 00:55

Saturday, Apr 19, 2014 at 00:55
Fullriver for me also
AnswerID: 530843

Reply By: awill4x4 - Monday, Apr 21, 2014 at 21:07

Monday, Apr 21, 2014 at 21:07
2 x Fullriver 120 amp/hr batteries for me also but when they die I'll ditch the 72 kg weight penalty and get an equivalent amp/hr Lithium battery/s at half the weight.
Regards Andrew.
AnswerID: 530987

Follow Up By: ROBBS GONE BUSH - Monday, Apr 21, 2014 at 22:54

Monday, Apr 21, 2014 at 22:54
Hi Andrew,

Are you talking about deep cycle lithium battery?
Have you done any research on these and can you recommend a brand/website to review?

Cheers Rob
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FollowupID: 814014

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