[Public-List] Batteries, solar panel.

[Marcelo D. Gentinetta]

My present batteries are approximately 2 years old. So if I add a second house battery and alternate the two as you mention, do I then need to add a second battery selection switch?

> On Aug 4, 2018, at 3:20 PM, Greg Hounsell via Public-List <public-list at lists.alberg30.org> wrote:
> 
> Marcelo;
> 
> Your house and start battery, from how you describe it, going through the
> battery selector switch are not "in parallel" unless the switch is set to
> "both". In terms of this discussion I would think of them as separate banks.
> 
> Before adding a second house battery, how old and used is the one you have?
> The reason asking is that adding a new battery in parallel to an older
> battery can potentially shorten the new battery's life if there is more
> than say a couple years difference. An older battery slowly over time loses
> it's capacity to reach 100% charge, nor hold charge as easily as a new
> battery. If, say the existing battery can only ever be charged to 90% then
> when you connect the new battery to it they will try to equalize. The
> weaker drawing down the newer.
> 
> If you are not using them in parallel but as separate banks they can be
> placed where most convenient. Some people do this and alternate which
> battery gets used each day as the other gets charged.
> 
> Cheers
> Greg
> 
> 
> On Sat, Aug 4, 2018, 3:14 PM Marcelo D. Gentinetta via Public-List <
> public-list at lists.alberg30.org> wrote:
> 
>> I agree with Michael that you can over analyze everything. Unfortunately,
>> I have an analytical mind so it is a battle!.
>> I am trying to keep the system as simple as possible though and trying to
>> learn more about the whole process. Greg’s explanations have been very
>> helpful. This brings me to another question. If you added a second house
>> battery, where would you locate it in a liner boat and would it be in
>> parallel to the present house battery which is already in parallel to the
>> starting battery?
>> 
>> 
>> 
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