Re: (ET) Harry Landis Charge controller

["MR23 \(Christopher M. Meier, Mpls, MN\)" <mr23 mn rr com>]

Concerning the charge controller item at
http://www.elec-trak.org/cgi-bin/classifieds/classifieds.cgi?search_and_disp
lay_db_button=on&db_id=15&query=retrieval

Is the setpoint temperature compensated?  Here in MN the temp
ranges from -30*F to +100*F when I would have it plugged in
on/after charge.

The board doesn't appear to be conformally coated, or otherwise
protected against moisture, acid mist, etc.  Or is it?

My E16's charging unit just failed, probably the timer from where
the 'flash' seemed to come from, so I'm a potential customer.

Thanks,
Chris

----- Original Message -----
From: "harry landis" <hlandis hotmail com>
To: <elec-trak cosmos phy tufts edu>
Sent: Friday, August 10, 2001 12:26 AM
Subject: (ET) Harry Landis Charge controller


> To the list:
>
> I still have more of the controllers. Somehow it appears I haven't been
> getting all the messages. It might be a problem with Hotmail or with the
> website. Don checked out the feature and it worked fine. One message got
> waylaid by my Hotmail junk mail filter, but I don't know why.  So I put 
> my
> email address in the ad so people can contact me directly.
> It looks like there are plenty of opinions and conflicting data on 
> battery
> voltages under different circumstances and the proper regimen for
charging.
> I have had good success with my charge controller, which only looks at 
> the
> voltage of the pack with neither charging or load. If it is fully 
> charged,
> it will stabilize after some hours at about 38 volts. Then the controller
> will turn on the charger a couple of times a day for about five minutes,
> which keeps it up and equalized. There was some discussion a year or so
ago
> about whether 38 volts was the best voltage to use.  I wasn't persuaded 
> to
> change my mind.  But, in the interest of generating some more 
> controversy,
> as well as some data, I propose the following:
> Everyone with a digital voltmeter, and a gas car which seems to have a
fully
> functioning charging system and a good battery should go outside and
measure
> the battery voltage right on the battery terminals, maybe at 1 hour
> intervals after shutting down the car. If everyone reports back, we 
> should
> have plenty of data.  I bet the majority will be around 12.66 volts. If
so,
> that would mean 38 volts is about right. If anyone wants to do it year
> round, and keep track of the temperature, we will have yet more data.
> Mine reads 12.72, and I shut it down about an hour ago. And it is still
> pretty warm out there. It was around 95 degrees when I was driving it.
>
>
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