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Old 02-27-2015, 06:50 AM   #15
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I switched chargers, the first one didn't have enough juice to fully charge my 4-6v Trojan t105 batteries. I will let them charge a couple more hours and check the water level. Yesterday I said the battery's were less than 2 years old, I checked my records and they are less than 3 years old-6 months out of warranty.................Earl
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Old 02-27-2015, 09:27 AM   #16
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I switched chargers, the first one didn't have enough juice to fully charge my 4-6v Trojan t105 batteries. I will let them charge a couple more hours and check the water level. Yesterday I said the battery's were less than 2 years old, I checked my records and they are less than 3 years old-6 months out of warranty.................Earl
Earl, while we are waiting to see the results of running the inverter on fully charged batteries, is there an explanation why the house batteries would have been allowed to discharge to the extent that they did?

Just trying to anticipate a possible problem with the charger portion of your Magnum I/C.
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Old 02-27-2015, 03:02 PM   #17
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I am charging and performing maintenance on the batteries. I will give it a try on Saturday.
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Old 02-28-2015, 03:59 AM   #18
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I have the motorhome stored in my pole barn plugged into 115v, last week when I checked on it the red fault light was on. The charger/inverter may have been off for weeks. I am assuming this drew down the current.
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Old 02-28-2015, 10:52 AM   #19
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I have assembled the battery compartment back together and I am still charging the batteries. it looks like once I get the batteries fully charged up the inverter/converter will work. The batteries are up to 12.5v. When I plug the inverter in it will cycle between charging, bulk charging and AC overload. When I unplug the inverter/converter and reset the inverter/converter it shows Low Battery. I guess I will do the battery maintenance more often than springtime.

I will update on Sunday, It's too cold outside, the distilled water froze when I poured it!
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Old 03-01-2015, 08:20 AM   #20
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Well the batteries are fully charged and I am still have the AC overload when connected to AC current and DC overload when connected to DC current. Unless someone has any ideas I will remove the Magnum box and have someone service it.
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Old 03-02-2015, 04:04 PM   #21
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I removed the Magnum inverter from my Fleetwood Expedition. I took it in for service in Annapolis Maryland. I should find out what was wrong on Tuesday
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Old 03-04-2015, 04:04 PM   #22
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I got the Magnum inverter/converter back from the shop today, the bill was $646.00 the tech said that if you have a DC overload it is probable that you have a hardware failure and if you have a AC overload you probably have a software failure. I will update after it's installed. We are expecting a snow event on Friday so it may take a couple days. I guess in the future I will be disconnecting the house batteries and put a trickle charger on them.
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Old 03-04-2015, 05:30 PM   #23
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I got the Magnum inverter/converter back from the shop today, the bill was $646.00 the tech said that if you have a DC overload it is probable that you have a hardware failure and if you have a AC overload you probably have a software failure. I will update after it's installed. We are expecting a snow event on Friday so it may take a couple days. I guess in the future I will be disconnecting the house batteries and put a trickle charger on them.
Happy to hear that you got a potential fix to the problem.

What about this problem leads you to believe that a trickle charger is necessary, or the way to go?
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Old 03-05-2015, 05:50 AM   #24
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The past 5 winters I have been plunging into an extension cord all winter. I figured that I can disconnect the batteries, power down the converter and use a small trickle charger on the house batteries. Any ideas?
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Old 03-05-2015, 10:17 AM   #25
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The past 5 winters I have been plunging into an extension cord all winter. I figured that I can disconnect the batteries, power down the converter and use a small trickle charger on the house batteries. Any ideas?
I assume, by "disconnect" you mean you will remove the house batteries and store them somewhere with access to 120VAC to power the trickle charger.

This doesn't address keeping the chassis batteries charged. If you have to run a cord and another charger for them, what have you gained?

Your Magnum, when running properly, is the best choice for maintaining all those batteries, in my opinion.

I've done it that way for 9 years with no problems.
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Old 03-05-2015, 12:38 PM   #26
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Thanks, I will continue with the Magnum charging the batteries.
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Old 03-08-2015, 10:08 AM   #27
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Ok, the Magnum MS2000 inverter/converter is fixed, all is working as it should.
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