[T2] Help to enhance my AUX battery diagram before we burn alive !

[Ned Savoie]

You may want to post this to the Vanagon list, there are a lot more people
active and doing a lot with dual batteries and solar as well. My bus is
still waiting patiently to be put back together, but I am still lurking.
Bob, I wish I could help with your no start issues, but other than taking
some photos of my motor (which is on a stand), I can't offer much help.
Mine was one of the last Boston Bob motors as well.


Ned

--

Ned Savoie
Creative Director

Harbour Light Strategic Marketing
Savvy Software, Inc.
621A Islington Street
Portsmouth, NH 03801

[Telephone] 603.427.2821
[Facsimile] 603.427.0938
[Mobile] 603.828.2400

On Wed, Jun 3, 2015 at 5:51 PM, <accessys at smart.net> wrote:

>
> I have twin batteries but both wired in parallel so both are always
> working, but have a boat selector switch in the engine compartment (MUST be
> a make before break type) and when camping or whatever I just switch from
> both batteries to just one of them. then when is time to go I switch the
> other back into the circuit.
>
> Bob
>
>
>
> On Wed, 3 Jun 2015, Christophe Guilbert wrote:
>
>  Date: Wed, 03 Jun 2015 14:49:44 -0700
>> From: Christophe Guilbert <cguilbert at picasso.ucsf.edu>
>> To: "TYPE2 at type2.com" <TYPE2 at type2.com>
>> Subject: [T2] Help to enhance my AUX battery diagram before we burn alive
>> !
>>
>>
>> Hi,
>>
>> I am adding a new Aux battery and draw a diagram to do so.  I really
>> would appreciate if someone review it to see if I am doing something
>> dangerous, enhance the safety or if it could be done differently (and more
>> elegantly)
>>
>> Here is the diagram:
>> http://mondale.ucsf.edu/download/secondary_batt2.pdf
>>
>> The feature of rewiring is to select which battery and I to use for all
>> my appliances and I can start the fridge on the AUX battery when the van is
>> not running.
>>
>> Basically , I have my Aux battery wire going to the dash board to provide
>> the interior light , cigarette lighter and radio.  The interior lights,
>> cigarette lighter wires was "repossessed and diverted" from the main fuse
>> panel S8. The Aux battery wire (in the dashboard) is going back to the Aux
>> battery compartment trough the regular fridge/LED panel relay (C in my
>> drawing).
>> I have a switch S1 which control the relay B , relay B can select if the
>> current flowing to the fridge/LED and appliances panel is coming from the
>> main or the AUX battery. This way I can select which battery I want to use
>> for my appliances. Note that the AUX battery is used by default.
>> Switch S2 is here to override relay C (fridge relay ) to have the fridge
>> working on the Aux battery when the engine is not running , it is also
>> light up a strong red light in the dashboard to remind me that the fridge
>> is running on the aux battery. This is practical if you are doing grocery
>> and don't want to switch to gaz. the trick is that when the fridge is not
>> working , the LED panel is (that's the design of relay C),  so I use the
>> +12V out of the LED panel post to energized relay A 86 terminal.  I trigger
>> it by the switch S2 through Tem 85. Note that the S2 switch is using ground
>> line.
>>
>> If any one could be kind enough to tell the weakness of my design and how
>> to fix it. I especially would like to emphasized where to add more fuse to
>> make it safer.
>>
>> Thanks and sorry for any eventual headache following my diagram.
>>
>> Chris
>>
>>
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>
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