ts4-A-2f

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    Gary Hethcoat

    Hi Luis. Are you measuring the string voltage with the strings connected to the charge controller? Are you using the Schneider MPPT Disconnect RS? With a string of five PV modules, and three TS4s (2 x TS4-A-2F + 1 x TS4-A-F) and nothing else connected, you should get about 1.8V on your meter. Each TS4 will have 0.6V in the shutdown state. If you connect the strings to the Schneider MPPT Disconnect RS (or a Tigo RSS Transmitter) and the charge controller, you should get full voltage, something close to Voc. If you are seeing 1178 volts, there is something wrong. Check your wiring. You might also try metering the outputs of each TS4, they should be about 0.6V each when disconnected from the string.

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    Aleksandra Radchenko

    Hello Luis,

    Thank you for reaching out for clarification. Considering your string lengths, each string should have a maximum voltage output of (modules in string * Voc) 389 volts. The TS4-A-2F and TS4-A-do not increase the voltage output of your strings and considering your voltage measurement is very close to the voltage output we would expect from a string of 15 modules in series (1194 volts), our advice would be to triple-check your wiring as it seems these three strings are in series.

    I hope I answered all your questions, but please let me know or give us a call if any additional information or assistance would be helpful.

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    Luis Rodriguez

    Hi I stand corrected, is not 1178 or 1830, it is 1.830 (I took a picture) at the end of the 5 strings which corelated to 2 TS4-A-2F and one TS4-F.  I forgot that the TS4 are on the off position until power on. I was concern to not exceeding the MPPT 100A 600V from the strings. So I can check the string voc at the MPPT Disconnect?

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    Gary Hethcoat

    Hi Luis, yes 1.8V sounds much better!  Yes, you can check the string Voc at the MPPT Disconnect RS terminals with the string disconnected from the charge controller.  You need DC loop continuity before the RSS Signal will be seen by the TS4s and then you will get full power.  So, the strings have to be connected to the MPPT Disconnect RS *and* the charge controller, and everything needs to be powered up.  Let us know what you see.

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