Hi, I've been fitting some extra panels on a separate string. Tested each panel open voltage ok, and once tigo connected ok. However, once in series voltage either drops to 34v or zero. These are re-purposed Tigo's from my old system am I right in saying these need re-allocation and this is then being the likely reason for the low or zero voltage from rapid shutdown. They aren't currently connected to the inverter as I was testing the string first and came across this problem. Thanks in advance.
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