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Batteyr disconnect Priority Start

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Posted by Offgridman on March 2, 2005, 12:34 am
 
I just found something and went and purchased one.
It is a electromechanic switch that has very low current drain that
monitors your battery banks voltage and disconnects around 11.9 volts.
I emailed the company described my cabins electrical system and asked
them about using it in this application as insurance for my battery
bank. Anyone thought about using one of these Marine Priority Starts as
a LVD on and offgrid system?
I got mine at West Marine for $0 on sale. New models LVD at 11.7 VDC
mine is the LVD at 11.9 model (OLDER ONE. I can use it on my boat if it
will not work at the cabin. They rate 1000 amps starting current and
very low resistance for the switch.
They do not rate the constant current carrying capacity of the unit. I
asked they what it will carry.

What do you guys think about this thing?
Offgridman


Posted by Ron Rosenfeld on March 2, 2005, 1:18 am
 


I think it is a good thing to have a low battery voltage disconnect.  Mine
is built in to my inverter and I just left it at the factory default of
44V.

I'd wonder if 11.9 volts might be too high, though, depending on the
voltage drop of your system under load.


-- ron  (off the grid in Downeast Maine)

Posted by Offgridman on March 2, 2005, 2:37 am
 Sorry it has a one minute delay on the cut off to allow for voltage
depression. Not sure if it will be enough. The new units use 11.7 volts
as the cut off.
My inverter has a 10.0 LVD which is about useless.
Offgridman


Posted by Ron Rosenfeld on March 2, 2005, 6:00 pm
 

On mine the value is programmable; but I've never changed it.


-- ron  (off the grid in Downeast Maine)

Posted by Scott Loupin on March 2, 2005, 9:27 pm
 Hi Ron, just curious, I live in central Maine, and am new to the PV world.
Do you know of any 'local' (New England) suppliers for batteries, panels,
etc?

Thanks,

Scott



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