The danger is that it would be possible for a fault to occur in which the busbar would get overloaded, handling all 200 A from the service feed plus whatever the PV breakers could supply.
NEC requires the PV breakers to be installed at the opposite end of the bus (if the sum of the supply breaker and PV breakers exceeds the busbar rating)... in that configuration, you can see that there is no way for the bus to ever see more than the current for which it is rated.
https://dept-wp.nmsu.edu/swtdi/files...n-feb_2013.pdf
http://www.jadelearning.com/thejunct...erconnections/
NEC requires the PV breakers to be installed at the opposite end of the bus (if the sum of the supply breaker and PV breakers exceeds the busbar rating)... in that configuration, you can see that there is no way for the bus to ever see more than the current for which it is rated.
https://dept-wp.nmsu.edu/swtdi/files...n-feb_2013.pdf
http://www.jadelearning.com/thejunct...erconnections/
Comment