[RE-wrenches] questions about solar charging 72v UPS

[Darryl Thayer]

the post I responded to started with was the 72 volt nom battery pack charging 
off from solar.  the solution involved using two chager controllers in series, 
charging off the array in sort of a bipolar fashion.  I used this series 
chargers to charge a "lead Sled" 72 volt car in my dark past.  The 72 volt 
battery would involve almost 90 volts to equalize.  

Darryl  




________________________________
From: "toddcory at finestplanet.com" <toddcory at finestplanet.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Thu, February 10, 2011 4:42:00 PM
Subject: Re: [RE-wrenches] questions about solar charging 72v UPS

I see the FM60 had a 60 volt option. Why not just use a single one at that 
battery setting for charging the battery bank?

Todd


On Thursday, February 10, 2011 9:44am, "Darryl Thayer" <daryl_solar at yahoo.com> 
said:


Hi all 
I have attached a PDF of a charging scheme using Outback FM controllers.  The 
upper voltage 36 to 72 volt CC can not have a communication line connected, it 
will blow something, either the hub, or the controller as the controller floats 
but the communication lines are connected to the negative, and it would be 36 
volts above ground.    



 



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