Battery Minder charger question

18 posts / 0 new
Last post
22theman
Offline
Last seen: 11 years 1 month ago
Joined: Thursday, April 10, 2008 - 09:25
Points: 82
Battery Minder charger question

I bought the following charger because my second Zapino charger blew out in one year's time:

http://www.batteryminders.com/batterycharger/catalog/BatteryMINDer-12-Volt-2-4-or-8-Amp-Charger-Maintainer-Desulf-p-16133.html

What is the best way to hook it up? I tried hooking it up to one of the batteries because I thought that electricity would flow through all batteries.

Can I use this charger?

Any help would greatly be appreciated.

Danyel

reikiman
reikiman's picture
Offline
Last seen: 4 days 23 hours ago
Joined: Sunday, November 19, 2006 - 17:52
Points: 8447
Re: Battery Minder charger question

That's a 12v charger meaning it can only charge one battery at a time.

Tanner
Tanner's picture
Offline
Last seen: 10 years 6 months ago
Joined: Thursday, April 24, 2008 - 07:13
Points: 94
Re: Battery Minder charger question

Since your new charger is a 12volt charger, you can only use it to charge one battery at a time. But to do this on a Zapino, you would need to have access to each of the five battery terminals. This isn't really practical unless you install some wiring and a connector that would allow you to charge each battery separately with your new charger. When I first wired my Zapino for bank charging I only charged one battery at a time because I only had one 12 volt charger. But I soon realized that it took too much time to charge the battery pack and too much labor switching the charger leads to each battery. I then decided to buy 5 12 volt battery chargers and all has been well since.

Steve Tanner

22theman
Offline
Last seen: 11 years 1 month ago
Joined: Thursday, April 10, 2008 - 09:25
Points: 82
Re: Battery Minder charger question

Would it be possible to hook up a 12v charger like the battery tender jr. (
http://batterytender.com/product_info.php?products_id=4&osCsid=eeb349ad1a6244307cf72556a5dbc223 ) to each of the 5 12v batteries in the zapino while they are connected originally?

chas_stevenson
chas_stevenson's picture
Offline
Last seen: 10 years 1 week ago
Joined: Wednesday, December 6, 2006 - 17:14
Points: 1309
Re: Battery Minder charger question

22theman,

What you are describing is Bank Charging. This is a great way to go but there are a couple of things you need to know.

1. The chargers selected for this task MUST be isolated electrically. There is a easy way to check for isolation. Using a meter set to Ohms check the resistance between the input and output wires of the charger. Be sure to check all possibilities including the ground, or third connection, on the input plug. If the charger is isolated there should be NO connection from any of the input to any of the output wires.

2. Each Charger may have a different cutoff voltage even if the same brand and model. If possible it is best to open the units and adjust them so they are all equal. If this is not possible then you may need to purchase extra charges to get them all close and return the ones that don't meet your requirements.

3. If one charger stops working you may have a battery that does not get charged causing it to be discharged very low during your next ride. You really need to be sure each charger is working all the time.

The BatteryTender unit you have chosen is isolated and they are all very very close in voltage so they meet 2 of the 3 criteria. I would want to be sure I could see the LEDs of each charger so I would know each one is operating. I would also check them with a meter from time to time because it takes very little power to operate an LED you could get a false indication of operation.

Grandpa Chas S.

fisher727
Offline
Last seen: 10 years 9 months ago
Joined: Tuesday, June 26, 2007 - 17:41
Points: 85
Re: Battery Minder charger question

You might consider a different vendor and save some money on the next 4 chargers you will probably be buying.
This one comes with a temperature compensation charge probe no extra charge. This will help you from over charging your batteries on hot days.

http://www.batterystuff.com/battery-chargers/12-volt/gel-cell/BM12248.html

Eric Fisher
www.SiliconeBatteriesUSA.com

garygid
Offline
Last seen: 11 years 2 weeks ago
Joined: Friday, December 19, 2008 - 23:25
Points: 441
Re: Battery Minder charger question

It does not say that the output is isolated, so it is probably not, thus, not suitable.
Also, it has a very low charge rate.

Cheers, Gary
XM-5000Li, wired for cell voltage measuring and logging.

22theman
Offline
Last seen: 11 years 1 month ago
Joined: Thursday, April 10, 2008 - 09:25
Points: 82
Re: Battery Minder charger question

Actually I ended up buying 5 Battery Minder #12117 :
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200332201_200332201

I plan to hook each one of to each battery in the zapino while the batteries are interconnected. I am hoping to recover some of the range I have lost on the batteries (7 mile range now) This should work right?

Thanks for all the replies :)

chas_stevenson
chas_stevenson's picture
Offline
Last seen: 10 years 1 week ago
Joined: Wednesday, December 6, 2006 - 17:14
Points: 1309
Re: Battery Minder charger question

22theman,

I see no reason those chargers should not work. Be sure and test them with a meter to be sure they are isolated. If they are not isolated when connected it will cause a short and damage at least one of your batteries.

Grandpa Chas S.

Tanner
Tanner's picture
Offline
Last seen: 10 years 6 months ago
Joined: Thursday, April 24, 2008 - 07:13
Points: 94
Re: Battery Minder charger question

Actually I ended up buying 5 Battery Minder #12117 :
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200332201_200332201

I plan to hook each one of to each battery in the zapino while the batteries are interconnected. I am hoping to recover some of the range I have lost on the batteries (7 mile range now) This should work right?

Yes, it should increase your range if none of the batteries are damaged from a sustained over/under charged state. I had a similar situation where my Zapino range was about 6 miles on a full charge (i.e. the string charger turned off). The problem was that Battery #1 was severely under charged and the stock string battery charger would not correct the situation. I have a PakTrakr installed so I was able to see that Battery #1 was the problem becuase it was in the 9.5 volt range. After switching to "simplified" bank charging the problem battery seems to have come back in line with the other four batteries. I thought that I was going to have to replace the battery but so far so good. The full charge range has increased to at least 12 miles (the longest ride I have taken since beginning bank charging).

Steve Tanner

22theman
Offline
Last seen: 11 years 1 month ago
Joined: Thursday, April 10, 2008 - 09:25
Points: 82
Re: Battery Minder charger question

Also 1 more question:

My 60v Zapino charger was 5 amps. I will replace them with 5 of these 1.333 amp Battery minders. Am I right to think there will be more juice going to the batteries??

fisher727
Offline
Last seen: 10 years 9 months ago
Joined: Tuesday, June 26, 2007 - 17:41
Points: 85
Re: Battery Minder charger question

It will take 3.75 longer to charge your batteries with your five 1.333 amp batter minders than with your 5 amp original charger. An overnight charge may not charge your batter full if they were well depleted.

Eric Fisher
www.SiliconeBatteriesUSA.com

22theman
Offline
Last seen: 11 years 1 month ago
Joined: Thursday, April 10, 2008 - 09:25
Points: 82
Re: Battery Minder charger question

I thought the 5 amp were divided by 5 to get 1 amp per battery. This is 1.33 amp per battery. Isn't this correct?

fisher727
Offline
Last seen: 10 years 9 months ago
Joined: Tuesday, June 26, 2007 - 17:41
Points: 85
Re: Battery Minder charger question

No you get 5 amps at 60 volts going into your five 36 amp hour batteries which means you would have to charge the batteries at least 7 hours to get them charged if they were completely depleted. Your new charger will charge at 1.33 amps at 12 volts. It will take 27 hours to charge one battery with this charger if the battery was completely depleted.

Eric Fisher
www.SiliconeBatteriesUSA.com

22theman
Offline
Last seen: 11 years 1 month ago
Joined: Thursday, April 10, 2008 - 09:25
Points: 82
Re: Battery Minder charger question

I see. Well right now since my batteries are sulphated ( I think), I am only getting about 6 miles a charge. It takes my stock 5 amp charger 2 hours to charge. I would be willing to put up with slower charging if the battery minder could restore my batteries as promised. I am not willing to buy a new Zapino charger because I've had 2 burn out in 1 year's time. At least the battery minder has a 5 yr warranty. I t seems like it is the best choice for me in terms of cost, hassle of setting up (it's automatic), warrany, and how little space it takes up. If you were me, what would you do?

Thanks for your help.

fisher727
Offline
Last seen: 10 years 9 months ago
Joined: Tuesday, June 26, 2007 - 17:41
Points: 85
Re: Battery Minder charger question

I would hook up the 5 chargers you just purchased. They should work fine.

Eric Fisher
www.SiliconeBatteriesUSA.com

garygid
Offline
Last seen: 11 years 2 weeks ago
Joined: Friday, December 19, 2008 - 23:25
Points: 441
Re: Battery Minder charger question

SEVERE DANGER WARNING:
DO NOT hook up more than ONE charger at a time if your batteries are still connected to each other ... UNLESS you are SURE that the charger's outputs are ISOLATED! The "specs" for the charger do NOT mention isolation, so ASSUME that they are NOT isolated until PROVEN otherwise.

Cheers, Gary
XM-5000Li, wired for cell voltage measuring and logging.

22theman
Offline
Last seen: 11 years 1 month ago
Joined: Thursday, April 10, 2008 - 09:25
Points: 82
Re: Battery Minder charger question

UPDATE: I bought the 5 batter minder 12v for $200 at RVupgrades.com. I attached them one by one to each battery and hid them by attaching them to the inside frame parts of the Zapino. I also bought the yellow 60v charger posted elsewhere on zapino boards for another $50 online. I have them all hooke dup. Anyway my point is the battery minders are AWESOME! My range has gone from 7 miles to 20+ miles. I thought my batteries were shot but they were just sulphated.

Log in or register to post comments


Who's online

There are currently 0 users online.

Who's new

  • wildbeas
  • lkonings
  • Kenechukwuezegbulem
  • Paguilar
  • simplyeric

Support V is for Voltage