breaker & fuse sizing for panels

Posted by James Johnson on May 18, 2008, 06:18:10 PM

breaker & fuse sizing for panels
Hello,

New to this forum and just ordered the  Photovoltaics: Design & Install Manual. While I'm waiting for it's arrival, can someone help me understand how to size the breakers for the PV  and the fuse size for coming off the battery bank to the inverter? Do I even have the location of these items figured correctly? If not, please impart some wisdom my way.

Thanks
James
 

Posted by James Johnson on May 25, 2008, 02:49:58 PM

Re: breaker & fuse sizing for panels (Reply #1)
Ha!  the book answered my question perfectly...

J
 

Posted by James Cormican on May 25, 2008, 02:59:17 PM

Re: breaker & fuse sizing for panels (Reply #2)
breakers for combiner are 1.56 times series string isc or the max series fuse size listed on the module.

total array disconnect (before charge controller) is total array isc times 1.56

inverter to battery disconnect is found in 690.8.

continuous power divided by lowest dc operating voltage times inverter efficiency

hope that helps, write back if need be

james on location in chicago
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