Dual batteries

i can supply them for around $180 plus post what are ebay trying to flog them for?

Oziexplorer is selling the Redarc unit for $120 inc postage. He can be contacted via the overlander forum

Hooroo

The Voltage Sensitive Relay : highest sold for $106. Others sitting on $80 and $60 but will go much higher as the end of auction approaches.
Redarc "Smart Solenoid" Dual battery charging system is up to $142 ... ses is worth $280 retail. I guess you hate these guys. Some sort of retailing "black economy" selling new stuff as apposed to people selling off unwanted 2nd hand gear

Gday Jimbo
They seem to be a good unit, much thesame as the smart solenoid sold by ARB. What they do is connect both batteries via a relay(and wire) when the main reaches a certain voltage, and disconnects them when the main is below a certain voltage, or motor is stopped. Plenty of variables there as your aux may be flat when the main has charged enough to get the solenoid to connect the two(resulting in a great amount of amps crossing over) or it may be full.
I have been around these systems for quite a while now and i still dont understand fully how 12v battery systems behave in all circumstances. Some of the electricians at my work cant explain some things i ask, so its not an easy concept to get around. Most people here(im putting the foot in the mouth here) with dual batteries would comment that the aux battery tends to need topping up more with water than the main?? for instance (gremlin under the bonnet gets thirsty)
Go get a redarc for fit and forget type of dual battery isolation. as stated by another, they are $120 sent to you on overlander.com.
Andrewwheredayathinkwer mike?

There are two redarc Solenoids. Can't exactly remember but 1 is 100amp? and the other is 200amps? I needed to get the larger one for my 100Series. Can't check under the bonnet right now. If you get the cheaper one it could stuff up because of your vehicles electrics and then your up for the dearer ony anyway. Then they become expensiveAlpaca

Know nothing about Redarc, but have used a Bosch marine unit cat. 0332 002 156-805 for the last 10 yrs. Comes with wiring instruction, from recollection app. $160, cannot fault.
Ebay-----caveat emptor!
cheers haze

Gees, people. That ebay "smart relay" had fifteen minutes to go when I read your advice so thanks very much indeed. Now, does anybody know if my '96 petrol Jackaroo needs a 100 amp or a 200 amp Redarc ?