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Re: (ET) Chargers (and winch)
Yes, you can get charge controllers that are temperature compensated and
are programmed for a variety of charge regimens. I don't know if they
fully shut the panels off from the pack when done, though. The trick is
finding one for a 36V pack. Controllers for 24 and 48 volt pack sizes are
common.
They could also run a ventilation fan to keep temps down. In fact you can
buy a couple types of vent fans that have panels built onto them.
David Brandt
--- On Thu, 8/13/09, Mike Finck <M Finck setterlin com> wrote:
> From: Mike Finck <M Finck setterlin com>
> Subject: Re: (ET) Chargers (and winch)
> To: noaddress drmm net, elec-trak cosmos phy tufts edu
> Date: Thursday, August 13, 2009, 3:45 PM
> With that segue I would like to move
> to a related topic of keeping the
> batteries in my golf cart happy. This thing sits in a
> cute little golf
> cart garage unattended for 10 months or more, I bet temps
> in the garage
> can reach 120 degrees. I don't see leaving anything
> plugged in
> unattended for that long as wise. But I was thinking
> a very small array
> of solar panels that would by size be incapable of creating
> a hazard
> might be a start. Could the panels be controlled to
> be truly off and
> charge only when discharging hits a programmed point?
>
>
> Michael H. Finck
>
> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu
> [mailto:elec-trak-bounces cosmos phy tufts edu]
> On Behalf Of David Roden
> Sent: Wednesday, August 12, 2009 3:26 PM
> To: elec-trak cosmos phy tufts edu
> Subject: Re: (ET) Chargers (and winch)
>
> On 11 Aug 2009 at 14:36, David Brandt wrote:
>
> > With the modular chargers I am familiar with, they can
> be left plugged
> in,
> > which with an ET would probably mean for a week or
> so.
>
> Careful! No lead battery should be left on charge all
> the time.
>
> If the charger shuts off COMPLETELY when it's done, then
> yes, you can
> leave
> it plugged in. Most don't really shut off, however, the go
> to low rate
> or
> float charging.
>
> For an application where the device is used regularly (even
> monthly),
> float
> chargers and battery maintainers do more harm than
> good. Safest policy
> for
> long battery life : when the charge is finished, pull the
> plug.
>
>
> David Roden - Akron, Ohio, USA
>
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