Thanks for all the comments on the Battery Monitors. The large screen cycle analyst seems like a good instrument and reasonably priced. I will probably purchase this unit.
Doug
--- In electricboats@yahoogroups.com, Arby bernt <arbybernt@...> wrote:
>
> You can set the wheel diameter in the Cycle Analyst and get the RPM/10 quite
> easily using one of the Hall inputs from the motor encoder, provided you're
> using a brushless motor. If not, there is a reed switch provided with the Cycle
> Analyst which will need to be mounted on the prop shaft. You will then need to
> fasten a magnet to the shaft to trip the reed switch.
>
>
> The Cycle Analyst has proven to be very convenient, especially the second screen
> showing amp hours used, current draw, real time output, and battery voltage. I
> build them into Budd boxes from Allied, using a clear top with the CA mounted
> inside. The box can also the speed and power controls, as well as other small
> gauges for motor temperature and individual battery voltages if you have a weak
> cell in the string, for example.
>
>
> If you want to be really pro, go to www.sealingdevices.com, and order up a Gore
> vent for your enclosure. The vent will allow water vapor out, but prevent it
> from entering the box. It also keeps the box at atmospheric pressure, reducing
> wicking in the control cables. I use these vents in my motors and controllers,
> and can wash down the motor housings without any fear of liquid intrusion. Used
> in the motor, they keep grease in the bearings, and keep neutral pressure on the
> rear seal. The Gore vent resists 4.3 psi of pressure, about ten feet of
> submersion. The plastic ones are weak for anything which will experience abuse,
> so shell out for the stainless version for anything above deck.
>
> Be Well,
> Arby
> Advanced Marine Electric Propulsion
>
>
>
>
>
> ________________________________
> From: David Elderton <elderton@...>
> To: electricboats@yahoogroups.com
> Sent: Sun, October 17, 2010 6:02:46 PM
> Subject: [Electric Boats] Re:Battery Monitor
>
>
> Take a look at the cycle analyst from ebike.ca. They have a large display unit,
> and an external shunt, high current version. It even has a speedometer which
> accepts on/off pulses to measure speed, if you could figure out a way of
> getting that to work in the water, you would even get watt hours per mile
> measurements on the fly!
>
> Dave E
>
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