4 String DC Surge Arresters Connection
I have 24 x 420W panels, 4 x 6 panes in series = 4 Strings.
I have 4 x Negative Cables and 4 x Positive cables.
I have 8 x fast blow fuses 16A each and 2 x SUP2H1-PV surge arresters
How do I connect the four strings in this configuration? Picture attached.
I am not sure how to connect it.

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With 4 strings and 2 surge arresters the only option is to connect 2 strings to each surge arrester, effectively paralleling the 2 strings, if you need to keep them as 4 strings the only option is using 4 surge arresters.