I have bad Battery Isolators.

[lost00]

 My 76 Winnebago has bad battery Isolators for classic and coach so i am looking for right parts?

is that Cole Hersse 48122 Battery Isolator will work? or i have to buy same one like my old one ?

http://www.ebay.com/itm/like/151608629993?gclid=CLmOoZKquMQCFQ6OaQod7w0Ayg


My old  Battery Isolators look like one here picture

[1990HR]

Other types will work also but you can get the same one for just $20.00
https://www.rvsupplyparts.com/catalog/rv-battery-switch-disconnect/tekonsha-12-volt-continuous-duty-battery-switch-4-terminal-7001-4851.html

[lost00]

 Thank for info and i will order that one..     also i just curious what different between  Battery Isolators box with Amp
but other normal small Battery Isolators with no amp.. ?

[1990HR]

Not sure what you mean. I have an automatic one in my boat that isolates the starting battery if it reaches below 12 volts.
It is designed so if you are hanging out on the lake with the radio on it won't allow the starting battery to die just the deep cycle battery.
Maybe that is it. Don't think we need that for a motorhome but someone may like the idea.

[PwrWgnWalt]

Lost - if you are referring to the "70 Amp", or "140 Amp", or other ratings for an isolator (e.g., the ebay link above goes to an old-style box isolator rated for 140 Amps)...  this is the amount of current that can safely pass through the unit (some have a higher rating for a short time, check their specs).

The old box-style ISOLATORS rob some of the voltage due to their internal circuitry (diodes), which can effect charging to full capacity, so most MH's use a DISCONNECT like the Tekonsha pictured (canister-style). 

If yours is the canister-style, the easiest route is to replace it with a canister-style.
To read more, you may have better luck searching for a battery DISCONNECT (instead of 'isolator').

Here is a great "quick" read on the differences and ratings:  http://www.classicwinnebagos.com/forum/index.php/topic,7076.msg31326.html#msg31326

There are numerous other posts on this site about the pros and cons of each style, and alternatives (like a "latching relay", e.g. Intellitec).

[eXodus]

this in your picture is called a battery solenoid.
And I would opt for going no less then 200A , or you risk killing it early.

These solenoid should get activated when the engine starts and the alternator kicks in then the alternator is charging both battery packs.
But if one side of the batteries is severely discharged a lot of energy is flowing from one bank to the other - this is what's killing theses solenoids.

[Oz]

Awesome, Walt!

[lost00]

I want make sure standard SS597 will work For battery aux battery for classic and coach Cuz my friend have one for me free

Let me know tks

[DaveVA78Chieftain]

It can work but it is only 80 amps.  Can be used to allow alternator to charge aux battery.  For Aux start it may be to small.  Starter pulls upwards of 200 amps when starting.  Original solenoid was rated at 100 amps.

Dave

[lost00]

Thank for let me know...