A Sunny Island (SI) will export excess energy to the grid when the
battery voltage is driven above its target voltage (IE absorb or float)
so in the case of using a Classic or any other charge controller, the
charge controller needs to be set to a higher voltage than the SI.
Typically I re
Hello Wrenches,
I received a response from SMA about this:
The newest line of Sunny Boys (SBX.XUS-40) can be used in backup systems,
as long as the Country Standard is set to IslandMode60Hz and the firmware
is at least 2.03.01.R.
I plan on trying to look deeper into DC coupling with selling wi
Hi Brad,
I have heard that the selling from the Midnite charge controllers doesn't
work real well. There is a MNSI comm box so it may be the best way
(certainly the cheapest). Does anyone have experience with this scenario,
good or bad?
Thanks for your input as always
On Mon, Feb 18, 2019 at 8
Mac having installed quite a few of these and having the SMA SIs installed and
operating in my home, ( back up & off grid/ GT) please feel free to contact me
off list. I would strongly concur w/ Bradly w/ his suggesting you utilize the
dc coupling. Tump
> On Feb 18, 2019, at 8:19 AM, Mac Lewis
I think you can leave it DC coupled and enable grid tie in the Sunny Island
inverters. It might not be quite as efficient but a lot more cost
effective. If you don't already have it Midnite makes a comm box that makes
the Classic look like an SMA device. That might be helpful to coordinate
MPPT and
Hello Wrenches,,
We have been asked to take an SMA Sunny Island System that is off-grid, and
convert it to a backup system (Quad stack). Currently, this is a DC
coupled system using Midnite charge controllers. We would like to add SMA
grid-tied inverters to backfeed excess power. I have located
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