My Grizzly 07 / 700 will not charge, when I put my battery on the charger it charges for a short time then the gharger goes into default. I had the battery test at 3 different locations and they say it is good. When I put a volt meter on the battery while the machine is runnig it reads only 11.75 volts. When I put the volt meter on the battery out side of the machine after a short charge it reads 12.5 / 13 volts. What are the possibilities of the problem . I checked all the fuses, all the connection.

SOURCE: Started in the morning only with a boost.Sat all

yes the battery is probably five years old and not capable of holding a charge. if you go to a Murray's or autozone they will test the battery for free.

SOURCE: I have replaced my alternator

check all wires or there may be a fuse that has blowen out tip alot of times there may be a bad ground.goodluck

SOURCE: can a 6 volt battery only be charged on the 40/100

Yes. If you try to use 12 volt it may cause an explosion.

SOURCE: We are a repair shop

Hello, this seems to be a common problem on the F250-F450 super duty diesels...adding more electrical options, winches, light bars, radios, etc. makes it worse. They will eat alternators. What happens is the diodes and the regulators fail. Alternators are also rated like a starter, on a continuous duty cycle basis. This spec is rarely (if ever) published for automotive grade alternators.
Example: The starter for the 6.0 is rated for 3kv.
That is, 3,000 watt ---- a lot of energy.
But it is only rated for operation maybe 2 or 3 minutes at a time an hour --- then it needs to "rest" to cool, etc.
Operate the starter for much more (e.g. continuously) and it will burn out with as short as 1 to 2 hours of continuous operation.
It is an incredibly low duty cycle device --- only intended to be used a few times a day max, and then, only for a brief minute or less....
On these Fords, what i have done to is gone to a bigger better extreme service alternator, and modified the wires to remedy this problem. A 190amp alternator has been in service on a 05 F350 wrecker now for over two years, with no problems...before that, every 60-90 days (with a 110amp)
I also add on a fused cable as well..Check the exsting factory cable fusible link rating, install the same rating fuse and same or heavier gauge wire as factory....Run both wires side by side, be sure it is well protected, secured, extra chafe protection sleeve, etc....You are more than doubling the potential current flow, so the existing wire might melt...I strongly advise changing the pigtail if you have any doubts.
Here is a link that will hook you up with a high output alternator.
Note:---You can go bigger than the 190amp if needed, i used that as an example. Good luck, i hope this helps.

https://www.dcpowerinc.com/

SOURCE: how long does it take to charge CCA 7000 battery (

2amp 12 volt is a slow charge it will take about 6 or more hours. when the needle on charger is down in green to full charge its fin. hope this helps