Exactly.
Instrumentation aside, pack balance could be maintained by mowing only
after both sets are fully charged. If balance really becomes an issue
(mismatched capacities, old batteries), keep a full 48V pack in the
trailer and wire things up so that only the trailer batteries are used
when mowing.
I use my mower for moving large and heavy stuff around the yard 90% of the
time. I try to mow as little as possible :)
-Adrian
On Thu, 02 Jan 2014 10:52:48 -0800, Cor van de Water <[email protected]>
wrote:
Adrian,
You suggest for example running 24V when not having the trailer and
when mowing power is needed, to add the 24V of the trailer in series
(hence, the shorting connector to bypass the absent trailer and
rely solely on the tractor's own 24V pack?
Note that balance is an issue (adding the trailer after using half the
tractor's charge, then running the tractor's pack totally dead) so it
needs some thought and how-to-use this setup and preferably a separate
24V charger for both tractor and trailer, but it can work well.
Cor van de Water
Chief Scientist
Proxim Wireless Corporation http://www.proxim.com
Email: [email protected] Private: http://www.cvandewater.info
Skype: cor_van_de_water Tel: +1 408 383 7626
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Adrian DeLeon
Sent: Thursday, January 02, 2014 10:27 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] Michael's 48V lawn tractor/mower conversion: update
Why not fit whatever batteries you can on the mower and put the rest in
a
small trailer? Having the weight up front would help with hill climbing,
but if you have a relatively flat lawn/property, towing a small trailer
should be no big deal.
Even better: Keep enough juice on-board for moving/hauling stuff around.
Add the small trailer only when mowing. Use a pair of those 350A
Anderson
connectors to connect/disconnect the extra batteries. When not pulling
the
trailer, use a second 350A connector that's nothing but a shorting
block.
-Adrian
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