Ray Westbrook's posts

Posted by Ray Westbrook on Mar 21, 2010 08:04 pm

#1 -  Renewable Energy > Technical Discussion: Other > Re: Low Battery Cut Out Limits
Forgot to mention my solution to the problem. Have decided to use the Auxiary connection on the inverter which can send out a 12 volt signal. This can be programmed to sense low battery voltages from 20 to 52 volts for a 48 volt system in .1 volt increments. The delay time before it is triggered can be set in 1 second increments up to 600 seconds. I bought a piezo electric car alarm at Radio Shack for 6 bucks and change and wired it to the auxilary output. This wont shut the inverter down, but it will warn me when my battery bank is getting low so I wont kill the batteries.
 

Posted by Ray Westbrook on Mar 21, 2010 07:48 pm

#2 -  Renewable Energy > Technical Discussion: Other > Re: Low Battery Cut Out Limits
Thanks for all the responses to my original question. With regard to concerns over having the system shutdown when the battery voltage drops due to a current surge. If you did decide to set the cutoff voltage to a higher value, all you have to do is increase the Low Battery Cutoff Delay. This can be set for anywhere from 0 to 600 seconds which would prevent system shutdown due to voltage drops from temporary current surges. The default setting is 10 seconds.
Thanks again for all the replies!!  Ray
 

Posted by Ray Westbrook on Mar 15, 2010 05:25 pm

#3 -  Renewable Energy > Technical Discussion: Other > Low Battery Cut Out Limits
I have an Xantrex XW 4548 Inverter Charger and I am using a 48 volt battery bank. I noticed that the default value for the Low Battery Cut Off is 44 volts for a 48 volt system. If the battery voltage drops that low before any warning or cut off, GOODBY BATTERIES. The LBCO value can be changed but it has a maximum limit of 48 volts. At that point the batteries would have discharged to 25% capacity. Why doesn't the range allow a setting of at least 48.8 volts which would be a 50% discharge of the battery bank?
 

Posted by Ray Westbrook on Mar 7, 2010 09:17 am

#4 -  Renewable Energy > Technical Discussion: Other > Re: Xantrex XW Power Distribution Panel AC Breakers
Thanks Dwight,
  My son has a small cabin and is totally off the grid. We connected his generator to the top of the breakers on the distribution bars where the grid would normally come in. In his case he wouldn't have the generator running if he wanted to service the unit but I can see it would be useful if he was tied to the grid. Thanks for the reminders about getting zapped. Ray
 

Posted by Ray Westbrook on Mar 6, 2010 02:55 pm

#5 -  Renewable Energy > Technical Discussion: Other > Xantrex XW Power Distribution Panel AC Breakers
My son just installed Xantrex XW Hybrid system. There are 3 AC circuit Breakers in the Power Distribution panel. The center one of the three is labeled By Pass. It is ganged to the breaker to its right so that when the right side breaker is ON the By Pass breaker is Off. What is the function of the By Pass Breaker? The right hand breaker transfers power coming from the inverter to the panel in his house.
 

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