breaker & fuse sizing for panels

James Johnson
73 Posts
May 18, 2008 06:18 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
 
 
James Johnson
73 Posts
May 25, 2008 02:49 pm
Re: breaker & fuse sizing for panels

Ha!  the book answered my question perfectly...

J
 
 
James Cormican
578 Posts
May 25, 2008 02:59 pm
Re: breaker & fuse sizing for panels

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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