Re: (ET) 3 - 12v battery setup

[Rod Hower <rodhower ameritech net>]

 I use the group 27 marine battery on my pontoon boat.  I think it would 
be acceptable for very light 
usage.https://www.walmart.com/ip/EverStart-Lead-Acid-Marine-RV-Deep-Cycle-Battery-Group-Size-27DC-12-Volt-750-MCA/164242687?athbdg=L1200&from=/search
They're only $94 each at Walmart    On Monday, September 11, 2023 at 
10:32:17 AM EDT, David Roden <etpost drmm net> wrote:  
 
 Yes, it will work. They will run the tractor.  The charger will charge 
them.  

Don't try to use automotive or marine starting batteries.  They'll fail 
quickly in cyclical use.

I haven't measureed, but you could probably fit two group 27 marine 
batteries in the back and one in the front.  Other sizes may fit, but are 
less common and thus will probably be more expensive.

Plus::

The batteries will be cheaper, assuming that you use standard flooded 
marine type.

The tractor will weigh less, making it easier to load and unload when you 
display it.

The batteries will charge from flat to full in less than half the time.  

Neutral:

You will have to set the lift tap at 12 or 24 volts rather than 18.  I've 
used 24 volts without a problem.

Minus::

The tractor will work for less than half the time per charge.

The batteries will wear out sooner.  Depending on type, brand, and design, 
they may have half the life of golf car batteries, or less.  I've seen 
marine batteries die in a year or less when used in road EVs, especially 
in 
hot climates, but that's an extreme case.

The batteries will have less peak current capacity (amperes), so you'll 
need a lower gear for high demand tasks such as pulling loads.  Some very 
heavy tasks may become impossible because of the battery pack's higher 
internal resistance.  

The tractor will weight less, which will further reduce your ability to 
pull loads because of lower traction.


David Roden - Akron, Ohio, USA

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