I found the older, last generation SMA SB6000-US-10 for a really good price. I know several of its disadvantages are:
- no integrated AFCI
- no secure power
- bigger and heavier due to transformer
- only single MPPT
- no built-in communication module
I have no shading issues at all, didn't really think the secure power was all that useful, don't care about the weight... so, how much extra expense am I looking at to add AFCI and the comms module? I believe AFCI became a requirement under NEC 2014, correct?
Also, is it correct to say the module wiring is different between transformer/transformerless inverters? If true, what is that difference?
- no integrated AFCI
- no secure power
- bigger and heavier due to transformer
- only single MPPT
- no built-in communication module
I have no shading issues at all, didn't really think the secure power was all that useful, don't care about the weight... so, how much extra expense am I looking at to add AFCI and the comms module? I believe AFCI became a requirement under NEC 2014, correct?
Also, is it correct to say the module wiring is different between transformer/transformerless inverters? If true, what is that difference?
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