[RE-wrenches] Grid-tie inverter with zero export or non-selling mode

[Corey Shalanski]

Hello Dave,

As far as I know, setting up an inverter for zero export will *always*
require installation of current transformers (CTs), and those CTs must be
connected to some sort of power meter, which in turn must be connected to
some sort of control device. Whether the power meter and/or control device
are built-in or external varies by manufacturer. See attached diagrams for
several examples by popular manufacturers:

   - Sol-Ark: both power meter and control device appear* to be built-in
      - * I have never actually worked with Sol-Ark equipment, so someone
      please correct if this is not the case.
   - SolarEdge: control device is built-in, power meter is external
   - SMA: both power meter and control device are external

You'll note the presence of CTs in each diagram. Both SMA
<https://files.sma.de/downloads/SBxx-US-DS-en-38.pdf?_ga=2.179034083.671752729.1618086517-1642740404.1587256948>
and SolarEdge
<https://www.solaredge.com/sites/default/files/se-hd-wave-single-phase-inverter-with-setapp-datasheet-na.pdf>
offer 6 kW inverters; Sol-Ark <https://www.sol-ark.com/support/> appears to
only offer only 8 kW and 12 kW options.

--
Corey Shalanski
Jah Light Solar
Portland, Jamaica


On Sat, Apr 10, 2021 at 8:41 AM <offgridsolar at sti.net> wrote:

> Hi Wrenches,
>
> I do not see much grid-tie and never with a battery less inverter. I have
> a client who wants me to explore zero export for them. I have looked at
> http://www.elgrispower.com/
>
> Is there such a thing in a medium size 6 KW Grid inverter built-in that
> can zero export?  Or, Do I have to externally wire power meters ect?
>
> Thank-you !
>
>
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/ <http://members.sti.net/offgridsolar/>
> e-mail  offgridsolar at sti.net <offgridsolar at sti.net>
> text 209 813 0060*
>
>
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