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Re: (ET) PV powered ET more questions

Um. If you do this, you will have a massive explosion as the six batteries short themselves out. 

You cannot have batteries in series and parallel at the same time.

If they are AGMs, you might get a neat plasma fire.
You can however get a Trace/Xanatrex 3624 invetrter and hook it to the 36 volts in the tractor. That would work swell. 

Chris


robert winfield wrote:

Is this a hallucination and am I asking for an
explosion?
My Elec-trak has 6 DEKA Solar batteries in series for
36volts.

If I take 3 pairs of cables to the screw tops
(batteries are connected by the lead squeeze
connectors) and parallel them off so I have 3 sets of
12 volts, am I asking for an explosion if I run that
into a 12v charge controller or a 12v in 120v out
1.75kw Xantrex inverter?
Can I have batteries wired both in series and
parallel?
I realize dead shorts anywhere are very bad. 
I suspect I have too many paths for the electrons but
when I look at the drawing, if the charge controller
or the inverter can take it is looks ok.
I just have a queasy feeling I am missing something.

This is so I can use Solar PV to charge my batteries,
carry a small inverter on the ET to run a small
commercial inverter for string trimmers and electric
chain saws (Price Club/CostoCo had a nice deal on
1.75kw Xantrex inverters)
(and run the fridge, a radio and a couple of lights in
a pinch.) (There are a LOT of trees hanging over a LOT
of electric lines anywhere I drive, many more than
10-15 degrees past vertical)

(alt energy store sells 36v charge controllers i found
out, 5, 10, 20 etc amp)

--- daveb <daveb seanet com> wrote:


last year I was able to buy a 36v CC from BZ
products for under $70. don't know if they are still around and available though. let me know if you are interested and I'll make the effort to look up my 
old receipt and info.

dave
seattle

--
Open WebMail Project (http://openwebmail.org)


---------- Original Message -----------
From: robert winfield <winfield100 yahoo com>
To: elec-trak cosmos phy tufts edu
Sent: Wed, 28 Apr 2004 13:01:52 -0700 (PDT)
Subject: (ET) PV powered ET



I have an E-12.
I am trying to figure how to use photovoltaics to
charge the batteries. I had this discussion before


but


the info has vanished (sorry Chris)
Can I use a 12 and/or 24v charge controller and


clip


it on either 2 or 4 of the batteries.
The PV I am looking at puts out probably 120 watts
depending on how configured I can series them to


get


12v or 24v or 36v and 1/2 or 1/3 the amps
12v@10amp or 36v@3.3amp.
I would also like to yank the battery charger out


for


more room or shoehorn bigger batteries.
basically advice:
2 charge controllers, 1@12v and 1@24v jumpered


across


2 or 4 batteries

could i use 1 24v and have the electrons wander
towards the 2 batteries not in that circuit)

1 charge controller @36v (and where to find one??)
comments?

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