Battery Chargers

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Magneto
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Battery Chargers

Post by Magneto » Tue, 31 Mar 2009, 13:46

Can anyone advise of an alternative 12 volt battery charger to the Projecta 15,000ma 3 stage charger?

I am finding the Projecta to be a bit unreliable. They seem to only last 12 months and then die suddenly. Its not practical to have them repaired.

I am charging 12 volt lead acid deep cycle batteries.

Does anyone know of any other chargers of this type on the market which are robust and will last several years?

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Battery Chargers

Post by antiscab » Sat, 04 Apr 2009, 05:15

i take it no-one really does know of a reliable 15A 12v charger.

im guessing those jaycar ones only have a 12 month warranty?

you could try the visforvoltage forum or endlessphere fourm

theres more people on those two who use lead acid and individual chargers.

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Battery Chargers

Post by juk » Sat, 04 Apr 2009, 06:19

This is the best 12V battery charger there is:
http://www.ctek.com/EN-GB/MULTI-XS-2500 ... =technical
I brought one back from Sweden for a mate of mine to run his fridge from.
Specs:
TECHNICAL SPECIFICATIONS

MODEL      MULTI XS 25000
Input voltage AC      220-240VAC, 50-60Hz
Output voltage      Nominal: 12V
Efficiency      85%
Charging voltage      14.4V, Temperature compensated
Charging current      25A max
Back current drain*      <2Ah per month
Ripple**      <4%
Ambient temperature      -20°C to +50°C, output power is reduced automatically at higher temperatures.
Cooling      Fan
Type of charger      Eight step, fully automatic, switch mode with pulse maintenance.
Type of batteries      All types of 12V lead-acid batteries (Wet, MF, AGM and GEL).
Battery capacity      50-500Ah
Dimensions (L x W x H)      235x130x65mm
Insulation      IP 44 (Outdoor use)***
Weight      1.4kg
*) Back current drain is what drains the battery if the charger is connected without the power cord connected.

**) Ripple denotes the amount of interference there is to the current and voltage. A high current ripple heats the battery and shortens its life. A linear charger has a current ripple of 70 - 400% which is much larger than the maximum 5% for a modern sealed battery. Voltage ripple could harm other equipment, which is connected to the battery.

The MULTI XS 25000 delivers voltage and current with very low ripple. The battery gains a long service life and there is no risk of damage to other electronic devices connected to the battery.

***) IP 44 cannot be guaranteed unless the charger is positioned with its top or long side facing up.



Edit:
I found a 15 amp one:
http://cgi.ebay.com.au/CTEK-XS-15000-12 ... m153.l1262
and the 25 amp one:
http://cgi.ebay.com.au/CTEK-XS-25000-12 ... m153.l1262
Last edited by juk on Fri, 03 Apr 2009, 19:30, edited 1 time in total.

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Battery Chargers

Post by Tritium_James » Sat, 04 Apr 2009, 13:27

I can 2nd the CTEK charger recommendation, I have the XS15000 model (12V, 15A) and it's been perfect so far. They are not particularly cheap, but mine has been running almost constantly for 18 months, and they do actually put out their rated current, unlike a bunch of the cheaper types.

I got mine from here:
http://www.fridge-and-solar.net/charge.htm

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Post by Tritium_James » Sat, 04 Apr 2009, 13:30

Oh, and the CTEK charger has a fully isolated output too, so you can run multiple chargers on a series connected pack. I haven't seen a spec on the isolation voltage rating, so I don't know how far you can go with this.

The jaycar ones are very cheap, and seem OK for the price, but they do not have a floating output, so don't try to use more than one at a time!

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Post by Electrocycle » Sat, 04 Apr 2009, 14:51

you can remove the link to the output ground on the Jaycar one and they are floating.
I run two on the bike.
They were advertised as having isolated outputs, but somewhere along the line they had the ground connection added! It's probably an RFI thing.

I haven't had a problem with the Jaycar ones, but I have seen one die when used for uses other than charging lead acid batteries.
If you have a bunch of them running the fan noise gets pretty loud, but most switch mode chargers have fan cooling.

If you do buy them, find someone with a wholesale account (preferably Electus) and they're a lot cheaper!
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Post by Mesuge » Sun, 05 Apr 2009, 03:57

There are some CTEK clones (Made in PRC?) floating around, google is your friend. There has been actually some comparison tests performed between those and all was ok, if I remember correctly. Btw. for individual charging method you need at least 3stage type of charger (not 2!), i.e. including some balancing. CTEK and his clones are 5-7 or even more stages in the higher output models, so more good/godness there for your batts.

Also, there are time limited offers were just rebranded CTEK makes it to the martket(globally), for instance the European chain "Lidl" usually has the same model as low as less half the price. And they are gone in 5minutes.. Image
http://forums.mg-rover.org/showthread.php?p=2830407

These are perhaps official rebrands "Maypole"/CTEK 5stage chargers:
http://www.towsure.com/product/13450-Au ... _1.2-120Ah
http://www.a1motorstores.co.uk/catalogu ... arger.html

or "Benton" BX-1, bx-2:
http://www.4x4community.co.za/forum/sho ... hp?t=13222

latest revisions available from Lidl (Tronic/GYStech) even feature a fuseholder (10A) on connecting cable harness:
http://www.forum-auto.com/pole-techniqu ... #t15477244
Last edited by Mesuge on Mon, 06 Apr 2009, 21:11, edited 1 time in total.
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Magneto
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Battery Chargers

Post by Magneto » Sun, 05 Apr 2009, 13:06

Thank you to everyone who have provided all the good advice on this topic.

I hope this info about chargers assists others who are having problems with their chargers, and maybe gets some manufacturers to improve their product.

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Post by weber » Sun, 05 Apr 2009, 16:56

Stanbury Scarf & Lord is an Aussie/Kiwi company that make very reliable battery chargers. Originally for forklifts.
http://www.stanburysl.com.au/?showPage= ... nformation
I install solar power systems and I use only SS&L chargers in my off-grid systems, for backup charging from an ICE genset when the sun doesn't shine. They are physically large, so not for carrying in the vehicle but fine for the garage. Google "stanbury charger" (without the quotes) to find online retailers. They are not cheap.

For lower charge currents I have recently started using a much less expensive and much more compact Taiwanese "Kipoint" brand charger (in a load-shifting sub-system of a solar/grid/UPS system). So far so good (less than a year) and inside they look like they would be easy to repair if they failed.
http://stores.ebay.com.au/KIPOINT-Solar ... ter-Center
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Post by coulomb » Sun, 05 Apr 2009, 19:25

If you decide to buy KiPoint chargers from that E-bay site, shop around for a currency. I've found that they round their prices to a multiple of 25 dollars or pounds, and the difference can sometimes be as much as 12% or so. So check AU$, US$ and GBP (English pounds).

You still pay in Australian dollars of course, and pay for the privilege of converting Australian dollars to Taiwanese (or whatever) currency. But by choosing the item carefully, you can get that extra saving. Add the postage too; I think they round those as well so add the postage and compare the totals with the current exchange rate.
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