[Shop-talk] Hooking up a trickle charger to a truck with two batteries and a thermoswitch

[DAVID MASSEY]

Depends.  Some dual battery systems have the batteries connected in parallel full time.  In that case, one is all you need.  It doesn't matter which one you connect it to.

But some have a disconnect so you can run accessories until that battery goes flat and the other one is fully charged for cranking.  In that case you will need two.

You can use a commercial HVAC temp contol from Granger's or similar for the block heater. 

Dave
On Sunday, March 3, 2019 eric--- via Shop-talk <eric at megageek.com> wrote:
Two Quick questions,

1- Can I hook up a normal trickle chargerto a truck that has two batteries?  If so, how should I wire it?  I'mfinding confusing info on the web.
Do I hook it up to one battery only? 
Do I put the pos on one batt and theneg on the other?
Do I need one for each battery?

2- Is there a 120vac themo switch fora trucks block heater?  (so it only turns on the block heater if theoutside temp is below a certain temp?  (what would that temp ideallybe?)

Thanks again all!

Thanks in advance.


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Tech Viper
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