Now that 690.12 of the *NEC* 2017 has been in effect for several years, I am curious how designers and installers are meeting the associated requirements with string inverter-based systems (*not* considering microinverters or DC optimizers). I am generally a fan of the KISS principle, and as best I can determine the *Tigo* TS4-F device is one of the simplest options currently available on the market. What are others finding?
I'd love to hear about favored options for complying with rapid shutdown. Any success stories? or better yet, any early failures? -- Corey Shalanski Jah Light Solar Portland, Jamaica
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