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Thank you. Would optimisers on each panel be the same, better or worse than a dual string inverter (ignoring cost)? Why would the internal blocking diodes not be sufficient in this configuration?

Hello I am looking for advice for a PV system that I recently had installed. It comprises of 8 panels, four orientated south and four orientated west. Our installer led me to believe that this would be configured as a two string system, one for each orientation. However, what has been...