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Re: (ET) Elec-trak Digest, Vol 12, Issue 5



Ken,
I'll keep everyone posted on the Full River's, I still have to do research but what I'm thinking of doing is running 4 batteries for 48 volts. I'm building a new motor controller for the ET's that's a radical design from the 'H' bridge drivers and if it works out I'll run the 36 volt system off the driver. 48 volts is a lot better than 36 frankly and my off grid system here is 48 volts, I also have a couple of Extech 48 volt inverters that I got on eBay years ago for a song that I can use as mobile power on the ET. It's all in the testing phase and should be solidified by this spring some time.

Rob

Are the drive motors available as replacement parts yet?
I'm looking to go up to 48v with an Altrax.

Sent from my iPad

On Jan 8, 2014, at 10:42 AM, "Ken Olum" <kdo cosmos phy tufts edu> wrote:

I converted my Electric Ox to use 4x12V 135Ah AGMs from Universal
Battery.  Why?  I hate acid mist.  It corrodes everything.

Much as I love Deka gels, I felt they wouldn't do in this application
because of the snowblower, which has an unregulated motor, so there is a
huge current every time you switch it on.  I didn't think gels would
survive very long.  David, do you have a snowblower on your E15?

After 5 years, my range has decreased significantly, but I can still mow
my whole lawn (3/4 acre or so) on a charge.

For the Cub Cadet, I think sealed batteries are a reasonable choice,
although for mowing it seems like gel would have been better, as David
said.  That's all providing that they chose high-quality batteries and
used a proper charger.  If not, they won't last, and the Cub Cadet will
end up with a lot of angry customers and a bad reputation.

Robert, if you go with Full River, please post a report on how they do.
I thought about Full River for mine, but I couldn't find anyone at the
time who knew whether this was a trustworthy battery or not, so I went
with Universal even at higher expense.

                                       Ken

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