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DC fuse replacement

May 31, 2012, 07:25:36 pm

After a week of calling Silver Leaf and puting a meter on every DC wire I could find, except the one that would have made the problem obvious, I talked with Mark Harvey who suggested that I check the DC fuse between the batteries and the Xantrex inverter.  Guess what?

I have searched on line for a replacement fuse, T-TRON JJN-350, and have found many sources, from different countries, and vastly different prices.  I know that fuses are not something to "go for the cheapest".  Prices varied from $42 to $111. 

I want to get two, one to try, since I don't know why the first blew, and one spare.  The day the fuse blew I was driving the Burma Road, I-5 in Southern CA., with much bumping and jolting, with the roof AC operating off the inverter.  That isn't near enough amp draw to blow a fuse of that size.
I'd appreciate advice from anyone who has dealt with this. 

Thanks,
Bob Raab

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Re: DC fuse replacement

Reply #1 – May 31, 2012, 08:40:17 pm

Bob, I am no electrical engineer but my guess is that as the roof A/C drew down the voltage of the batteries, the amperage draw went up and could have fried the fuse. It doesn't sound like a good idea to run the roof A/C off of the inverter. It also seems that it would put an extreme load on your engine alternator. Most people use the generator if they feel the need to run the roof air while in transit.

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Re: DC fuse replacement

Reply #2 – May 31, 2012, 09:04:59 pm

Bob, I was not aware that an AC would be wired into an inverter circuit.  Lot of battery drain to try to run AC this way.  Perhaps prior owner did some rewiring ?  I'll bet that if you replace the fuse and tray it again on inverter that you will melt the fuse.
Good Luck
Gary B

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Re: DC fuse replacement

Reply #3 – June 01, 2012, 08:42:06 pm

My late 80's bluebirds had the ac's wired to work off of large inverters and racks of batteries to run them.  For a while. 

Had a few users in special circumstances that did use them for a few hours.  Then took all the next day to recharge the batteries.

Filled up a foretravel ored with 8d's and inverters to do the same thing.  He was a dry camper in the desert and had gen hours to deal with.  And a lot of extra money to play with.

Easy 10 grand in parts.  Also saw a nicad coach with racks full of them.  Had military surplus 1,000 cells so wired them up.  No storage left.  All batteries.

Bob

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