Strange wiring schematic?

[spnce]

I've been renovating a 1996 tiger cx for a few months now, and am at the phase where i need to reinstall appliances and electrical.

The rig has a Parallax 6730 converter which, according to their website, is capable of charging a battery. The existing setup is wired normally for the most part, except that one of the AC outputs from the 6730 feeds a second converter, whose output is wired straight to the battery. This feels redundant..

The second bit that I don't understand is that the fridge and water pump are wired straight across the battery, bypassing the 6730. All the other appliances and electronics are fed via the 6730's DC output. Maybe skirting a power limitation of the 6730?

Is there some logic that I'm missing? Or is this some aftermarket weirdness?

 

[RedRoamer]

i cant remember about the parallax..mine was a 6300 and i ripped it out ,rewired and relaced with an afterarket..then went solar, but my fridge was also factory wired straight to the original house battey and im in a 94 class b.

 

[DiploStrat]

Probably worth your money to dump the existing "converter" and replace with a modern inverter/charger.

One trick is to go with two inverters; a large MSW for microwave and other large loads and a smaller PSW for sensitive loads.

 

[spnce]

Probably worth your money to dump the existing "converter" and replace with a modern inverter/charger.

One trick is to go with two inverters; a large MSW for microwave and other large loads and a smaller PSW for sensitive loads.

We don't have any AC loads so we're fine without an inverter -- are there other compelling reasons to upgrade? Seems like modern systems are easier on the batteries?

 

[elmo_4_vt]

Sounds like a capacity issue... They can only put out so many amps, and if you're using appliances, maybe they thought that the first would only be good enough for those loads coming out of it, then the direct wired converter would be for the fridge/battery charging duties? Tough to say exactly. I know that the newer ones are smaller, have higher DC output ratings, and "probably" better for a newer style batter. If you're using standard lead-acid type batteries, then your main advantage to swap would be larger capacity in the same footprint. Not sure having the redundancy of the current setup provides any value to you in the ability to field isolate and still maintain some converter capabilities.

-

 

[DiploStrat]

1996 is way before the time when I have any personal knowledge of Tiger wiring. The more modern chargers:

-- Can give you a faster charge with lead acid batteries as you can get them in the 50-100A range,

-- Can give you a better charge as they are more likely to perform a full absorb cycle. (At least one popular "converter" is reported to drop from bulk to float charge, without a proper absorb stage.)

-- Assure a true float stage, important if you spend a lot of time plugged in.

Sorry I can't be more specific.