Re: (ET) PV powered ET more questions

[Jim Coate <jbc coate org>]

Danger! If you want to hook the batteries into parallel you MUST first 
remove the series connections.

So in this case that would mean removing 2 of the heavy cables (with the 
lead ends) to end up with 3 independent 12-volt groups. These then  and 
only then could be hooked in parallel for a massive 12-volt battery.

Changing all the cables around on a regular basis would be a huge 
nuisance IMO. You could add contactors (big relays) to switch things 
around for you, but that would likely cost more than the extra costs of 
 a 36-volt charge controller or inverter.


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.


_________
Jim Coate
1970's Elec-Trak
1992 Chevy S-10 BEV
1997 Chevy S-10 NGV
http://www.eeevee.com