72 VOLT BATT ERY ARAY

Greg Moore
1 Posts
Aug 27, 2010 09:04 pm
72 VOLT BATT ERY ARAY

I FOUND NEW BATTERY BACKUP 3000 WATT THAT IS OUTSTANDING WITH ALL THE BELLS AND I HAVE  40TY 108 AH BATTERY BANKS MADE FOR THIS BACKUP   I GOT FOR A SONG  MY ISSUE IS THE BANKS ARE WIRED AT 72 VOLTS AS THAT IS WHAT THE DC INPUT IS  INTO THE  BACKUP INVERTER. I AM LOOKING FOR  A  SOLAR CONTROLLER THAT WILL ALLOW ME TO CHARGE THE 72 VOLT ARRAYS FROM MY SOLAR PANELS  I WILL WIRE THE PANELS FOR 72 VOLTS I JUST NEED  A LOWER COST CONTROLLER THAT HAS OVER CHARGE AND FEED BACK PROTECTION.  ANY IDEAS
THANKS GREG M M
 
 
James Cormican
578 Posts
Aug 30, 2010 05:04 pm
Re: 72 VOLT BATT ERY ARAY

nec 690.71 does not allow for battery banks above 48v nominal in dwellings.  furthermore many charge controllers can't accept pv input voltages at 72v nominal because of the effect of cold temps on pv voc.  you may be in the realm of something custom as off the top of my head, i dont know of any products that qualify.

cheers,

james
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