Re: PV: Battery Box?

[cor_van_de_water@dolfijn.nl (Cor van de Water)]

Dear Peter,

There are some possibilities, depending on your configuration and cabin.
You may want to place the battery box at the north side, out of the sun.
You may bury it, to use the rather constant earth temperature, but this
depends on whether you live on soil or rock.....
Due to your 24V system voltage you don't need to put the batteries as close
to your cabin as you would need to with 12V. In other words: you might find
a good spot for the batteries at a little distance from the cabin.

If the cabin is inhabited year-round, then the inside temperature will be
acceptable for batteries, so you might put the box inside, making sure it's
closed and vented to the outside of the cabin.

I once read a discussion about running water through tubes buried in soil
and dampening the temp fluctuations in the room, by providing the earth
temp inside. Can't remember where this discussion was listed.

Basically, your problem is no different than an EV, only EV's are often
grid-connected and some are actively heated, to optimise their range.
This does cost (waste) a lot of energy, not contributing to 'moving the EV'.

Success,
Cor.
the Netherlands
http://start.at/solar

> I am designing a PV power system for my cabin. Currently, I'm concerned
> about battery housing. My present design, on paper only at this point, uses
> 8 Trojan L-16 batteries configured for 24 volts.
>  
> I would like to know if anyone has come up with a good way to provide
> optimum temperature conditions for their battery bank that doesn't involve
> a lot of energy just to maintain the temperature inside the battery container.
>  
> It gets very hot here in South Texas in the summer and often reaches a low
> in the 20s in the winter. Obviously I need to do something to moderate
> those conditions if I expect the batteries to last more than a year.
> Besides a well insulated container, what else can I do?
>  
> I've thought about providing heat with a thermostatically controlled solar
> hot water system for the winter. That should be fairly practical. For the
> summer I've thought about doing the same sort of thing with well water to
> reduce the temperature of the batteries.
>  
> Does anyone have any advice or experience on the subject?
>  
> Thanks,
> Peter Hoyt
> San Antonio, Texas

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