[RE-wrenches] SMA SB240 - Multigate Required

[Bradley Bassett]

It would be difficult to know what the inverters are doing without a
Multigate in the circuit. There is no monitoring, LED indicators, or other
means to see the status of the inverters. It would require a third party
meter to see if there was current flow or not. My hunch is that the
inverters would not connect to the grid at all, but I have not tested that
inadvertently or on purpose.

Other that the monitoring my SMA micros have been rock solid for a couple
of years, too bad they are discontinued. I still have a dozen beta test
units and multigate sitting in the basement if someone knows of a use for
them. They are not listed.

Brad

On Fri, Jan 13, 2017 at 11:18 AM, <markf at berkeleysolar.com> wrote:

> Folks,
>
> The SMA installation manual is clear that the Multigate is an integral
> part of the micorinverter system and must be installed with the
> microinverters. It is clear that the Multigate is required to meter and
> monitor the microinverter system.
>
> I would never advocate that anyone attempt to deviate from these
> manufacture instructions. However, I wonder if anyone has incidentally,
> momentarily, bypassed the connection through the Multigate and if so, did
> they observe whether or not the microinverters happened to export power to
> the AC system in this configuration?
>
> Mark
>
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