[RE-wrenches] double insulated wire

[Marco Mangelsdorf]

I'm kinda confused.  With more transformerless inverters on the market
(e.g., SMA and Power-One), it's not clear to me if double insulated wiring
needs to be used all the way from each series string to their respective
inverter.

 

We've been installing the P1 3-6 kW TL inverters and there's no apparent
mention of needing to use such conductors, yet I remember needing to do so
when I installed a number of the 8, 9 and 10 kW SMA TL inverters.

 

Thanks,

marco

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