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Large AGM battery options

Posted: Tue, 14 Oct 2008, 19:36
by Lowly
I converting a mazda 121 bubble car using an advance forklift sepex motor running on a nominal 72V bus. I am hoping for about a 30km range.

I calculate that I will need about 150Ahr batteries for a reasonable life (75% discharge at the 1hr rate). I am not ready to make the lithium leap so am planning on using AGM batteries (or maybe Gel batteries if they will suit the application).

There does not seem to be much discussion on this forum about AGM possibilities.

I would prefer to avoid paralleling batteries which limits the possibilities somewhat. Those that I have found are listed below. Most of these have reasonable published data.

Odyssey(PC 2250 - AGM) 126@20hr www.extremebatteries.com.au $885
Exide(G120 - Gel) 130@20hr www.energymatters.com.au $757
Absorbed Power(GT12-150C -AGM) 150@20hr www.agmsaustralia.com $569
Fullriver(DC150-12- AGM) 150@20hr www.energymatters.com.au $560
Firststart(FS-12V 150A/H - AGM)     154@20hr www.firststartbatteries.com.au $530

Other batteries that seem to be used but that I cannot find in a large enough format are: Genesis, Panasonic, Remco, Concorde, Henda, Diamec, Lifeline

Can anyone recommend which way to go with for AGM or Gel batteries? I am not willing to pay for the Odyssey or the Exide as I am getting into lithium prices.

Regards

Greg

The summary above was taken from my comparison spreadsheet:
http://spreadsheets.google.com/pub?key= ... l26fcfCKZg

Large AGM battery options

Posted: Tue, 14 Oct 2008, 19:54
by Johny
When I was considering a DC system this site looked OK. You are doing the right thing asking. Get someone to verify any suggestions - including this one.
http://www.batteryguru.com.au/agm_deep_cycle_39.html

I also had some good sites from here:
http://energy.sourceguides.com/business ... Name.shtml

Large AGM battery options

Posted: Tue, 14 Oct 2008, 20:35
by a4x4kiwi
Hi, Check the Greensaver batteries. I have just imported 55 of them without a problem. It will be a few months until I get to test them.

See my blog for details.

They have 100 and 210 Ah units that may suit you needs. The contact I have there is Lily lilyhu@greensaver.cn I have found her to be very responcive and helpful. Do post the spec sheets when you get them. You should find they have a very low Peukert factor.

Regards,
Mal.

Large AGM battery options

Posted: Tue, 14 Oct 2008, 23:20
by Lowly
Mal,

Thanks for the suggestion. I read your thread when you got them and saw that AMPrentice was looking into some larger batteries for a low voltage conversion. Being a bit lazy, I sent him a PM to let me know what he found out - any news yet AMP?

Cheers

Greg

Large AGM battery options

Posted: Thu, 01 Jan 2009, 02:40
by Goombi
LOWLY ,

I use AGM batteries in my Barina and so far i cannot complain-- No maintenance and the safe and accepted from transport people.
My system Is 96 volt, comprising of 8 x100amp Units my driving is around 60-100 klm distance and top speed just under 80 Km/h The but mostly normal city driving 40-60 km/h.Batteries charge easy and all at the same time(done a test) and top voltage reaches 13.8 volt aproximate price for a battery this size is 268$ plus transport.. I chose "Powersonic" but there are others similar.Available in diferent amperages 100-120-150-200 amp

Large AGM battery options

Posted: Thu, 01 Jan 2009, 16:53
by TropicalEV
Hi guys,
        I'd be interested in finding out a bit more on these AGM batt's as well. ZEVA sells " optima yellow top" 12v 55ah for $330 each. I like the sound of Goombi's 100ah for $268 MUCH better! Where did you get them from?
And how much do they weigh? I'm planning an EV bike.

Large AGM battery options

Posted: Thu, 01 Jan 2009, 17:06
by jpcw
You can get some fairly cheap batteries on ebay. I got all my batteries about a year ago at over $100 each off the sell price just by asking for a discount for 10. Looking at the seller I got them from they have some reasonable prices on AGM's at the moment.

12V 110AH super heavy duty AGM SLA deep cycle Battery - $304.70
12V 100AH super heavy duty AGM SLA deep cycle Battery - $279.40

http://stores.ebay.com.au/best-battery-online

(and no I don't get a cut, just got great service from them)

Large AGM battery options

Posted: Thu, 01 Jan 2009, 19:34
by Goombi
Tropical.... "Powersonic 100amp"
The batteries weigh 31.5 kg -Size -L/W/H 305-168--228 Brisbane quote contact me if you need some --may do a bit better in price-- $268

Large AGM battery options

Posted: Fri, 02 Jan 2009, 00:30
by antiscab
Goombi wrote: LOWLY ,

I use AGM batteries in my Barina and so far i cannot complain-- No maintenance and the safe and accepted from transport people.
My system Is 96 volt, comprising of 8 x100amp Units my driving is around 60-100 klm distance and top speed just under 80 Km/h The but mostly normal city driving 40-60 km/h.Batteries charge easy and all at the same time(done a test) and top voltage reaches 13.8 volt aproximate price for a battery this size is 268$ plus transport.. I chose "Powersonic" but there are others similar.Available in diferent amperages 100-120-150-200 amp


Goombi,

have you actually done a range test in your barina?
how are you determining state of charge? (by AH or V?)
are these the batteries you are using:
http://www.power-sonic.com.au/pds/20080 ... G12100.pdf

i would be very surprised if you were able to get 100km range on 4.3kwh, even at 50kmh.
my scooter barely achieves that at 60kmh.

Matt

Large AGM battery options

Posted: Fri, 02 Jan 2009, 01:37
by Goombi
My Full charge is 107-109 Total Voltage devide by 8 batteries= 13.5-13.7volt First test took me 86 km and i still was on 10.8 volt per battery.. My assumption was that extra 15 km would not have been much problem. I am also taking into consideration that Gympie area is very hilly and some steep ones too I lack the luxury of a flat city streets,when travelling at 60 km would only take 40-60 amps and thus my estimate is quite correct.. The Controller is compatible with the motor and don't allow huge drainage My max is 200 amp and performance is just right... and you would be surpriced