Erika - I don't think you will find any major technical barriers but my
understanding is that it will void the warranty on the Enphase units. We
installed an AC coupled Enphase system with an SMA Sunny Island and it is
humming along just fine.
Andrew Truitt
Standard Solar Inc.
On Sat, Apr 10
Any issues except the usual ac coupled control mechanisms?
I am looking at a way to have about 14kw of pv in a grid-tie battery backup
scenario.
Current plan is to use an ac-coupled system with enphase and avoid metallic
conduit through the building and save on other issues.
The challenges a
Of course it's not a practical solution, which is why we strived for (but
rarely got) 2% VD on low voltage situations as I said in my first post. The
obvious reply to this post is that your scenario isn't real world anymore. MPPT
controllers fixed that. Or perhaps you advocate that MPPT controll
Here's my challenge to all of you that want to design for 1% or 1.5%
voltage drop all the time:
Take a 50-ft circuit carrying 40 amps at 12 volts, going to a C40
charge controller, select your wire size for 1% or 1.5% loss. You know
that's not a practical solution. I know that it makes more se
Bill,
The NEC is a minimum design design standard, but voltage drops are not
part of the code. The spots where voltage drop is discussed in the NEC
are fine print notes that are not code and are not enforceable as
code. Furthermore those notes were written without any consideration
of the ra
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