(ET) charger controller

["harry landis" <hlandis hotmail com>]

To the list:

There seems to have been some more activity lately regarding charge 
controllers. You may recall that last year I mentioned that I had a circuit 
that worked for me. Bob Donlevy and Jon K talked me into making the PC 
boards for about 25, and they have been using them for some months now. They 
seem happy, so I can offer them to the rest of you.
The circuit monitors the battery voltage till it falls below 39V, then turns 
on a solid state relay that controls the charger. The charger stays on for 
approximately 5 min then shuts off and waits until the voltage again falls 
to 39V. There are 2 wires that must be connected to the +bat and -bat ends 
of the battery pack, either on the batteries themselves or someplace 
equivalent away from the acid and grunge. There are 2 screws on the solid 
state relay that break the power to the charger. You can  connect them to 
the 2 switched wires from the timer if you are using the stock charger.The 
whole thing is less than 2" X 3" X 1.5". It can be mounted most anywhere, 
The setpoint is easily adjustable, but I recommend 39V.I have been using an 
equivalent circuit for over 10 years on an E8 and a E12, and it has worked 
well.
The price will be $40, including shipping (USPS Priority Mail) to anywhere 
in the US.
I am out of the country now, and will be back in about 6 weeks, so I can´t 
do anything till then, but this will give everyone time to think about it.

Harry Landis

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