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Isolators that DON'T use Solenoids

Submitted: Saturday, Sep 03, 2005 at 08:55

Mike DiD

I'm trying to get an understanding of the Dual Battery Isolators that are available.

Does anyone know of an Isolator that uses an Electronic MOSFET to provide the connection between the two batteries, rather than a Solenoid or Relay.

The Jaycar/DickSmith KIT is the only one I have come across.
ThreadID: 26090 Replies: 6
Views: 932 FollowUps: 7
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AnswerID: 128076   Submitted: Saturday, Sep 03, 2005 at 11:18

Member - Jeff M (WA) replied:

I used the kit you are talking about for about a year, but I have gone back to the Solinoid/Relay type. Even though they reckon there is no voltage drop accorss the mosfet deisgn I was still getting some. The relay give no visible voltage drop on my meter and is more reliable IMHO.

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FollowupID: 382715   Submitted: Saturday, Sep 03, 2005 at 16:36

Mike DiD posted:

The Silicon Chip Design ADDS IN a 0.1 Ohm resistor (1 volt at 10 Amps) to provide protection against reverse flow through the MOSFET Diode.
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AnswerID: 128093   Submitted: Saturday, Sep 03, 2005 at 13:03

at4x4 replied:

We are importing one at the moment which is similar technology, but also switchable, stackable, and 300 amp + for winching etc

powergate

Some also use voltage sensing relays.
Reply 2 of 6
FollowupID: 382714   Submitted: Saturday, Sep 03, 2005 at 16:34

Mike DiD posted:

Do you also import the MobiArc Alternator Welders ?
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FollowupID: 382912   Submitted: Sunday, Sep 04, 2005 at 20:43

Member - DOZER posted:

I have one...took it off for other accessories..
Andrew Wollongong
0408965433

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FollowupID: 382956   Submitted: Monday, Sep 05, 2005 at 07:37

at4x4 posted:

We do,
just finalised all the AS and legal jargon, and we have set up dist in 4 staes.
FollowUp 3 of 3
AnswerID: 128100   Submitted: Saturday, Sep 03, 2005 at 13:39

ACDC replied:

Stick with a solenoid or relays no problems the mosfet type have problems drain back.
Reply 3 of 6
AnswerID: 128102   Submitted: Saturday, Sep 03, 2005 at 13:52

Leroy replied:

Piranah is another.

Leroy
Reply 4 of 6
FollowupID: 382744   Submitted: Saturday, Sep 03, 2005 at 19:32

gqpat posted:

Try Ashdown electrical wholesalers or your local autoelect .TRANSPO an american name sell many types of true batt isolaters size is dependant on alternator output as they split the output current to each batt depending on which one requires it .They were also imported by Baxters auto elect wholesalers..
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AnswerID: 128266   Submitted: Sunday, Sep 04, 2005 at 20:46

Member - DOZER replied:

There is one isolator that swaps batteries and charges them seperate rather than joining them together....can anyone assist in the name...they do 2 or 3 batteries...joining a low battery to a charged one lessens the life of both plus the amps flow is unrestricted till they even out in volts.
Andrew

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Reply 5 of 6
FollowupID: 382926   Submitted: Sunday, Sep 04, 2005 at 21:37

Mad Dog (Australia) posted:

The high range Rotronics model does that. Info on the their website rotronics.com.au....I think




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FollowupID: 382946   Submitted: Sunday, Sep 04, 2005 at 23:21

Member - DOZER posted:

Thats them......they charge each battery independantly, starting at the main...which makes more sense than just joining the batteries together once main reaches charged stste....
I installed a second alt from an old datto and ran 2 complete systems....cheaper than an isolator, better in many ways, but not easier.
Andrew

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AnswerID: 128960   Submitted: Wednesday, Sep 07, 2005 at 21:33

4145derek replied:

Try the Bi-80 availbale on ebay. Best Fully automatic unit available at under $100
Reply 6 of 6

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