[RE-wrenches] Parts List For AC Couple Disconnect

[Mark Frye]

OK, I am hearing this over and over and I just want to confirm that is 
true even if the BB is older and does not have "NEW Frequency Shifting 
AC Coupling".

On 11/3/2019 4:26 PM, Dave Angelini Offgrid Solar wrote:
> The BB inverter will drive the grid inverter off frequency because it is
> full/floating and the grid tie will stop producing power. This is how AC
> coupling works but if something goes wrong, like programming gets corrupted
> by surges or the battery hits an LBCO or HBCO AC power will stop. Or if
> this is being controlled by Soc and it gets wrong data or there is a
> network issue, or all of the other things that can happen that I have not
> thought of.
>
> Why do you not want to build a normal DC couples system? I forget
> fast....Happy Hour!
>
> Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/
> e-mail offgridsolar at sti.net
> text 209 813 0060
>
> On Sun, 3 Nov 2019 16:17:39 -0800, Mark Frye <markf at berkeleysolar.com>
> wrote:
>> Folks,
>>
>> Please allow me to ask another question:
>>
>> Suppose I have a bi-direction inverter/charge with no connection to the
>> grid.
>>
>> I have GT inverter ac coupled and producing 2000w. The battery is in
>> float, and I have 2000w of load connected. All is well.
>>
>> Now suppose I remove the loads without disconnecting the GT inverters.
>>
>> The word is that something bad happens now. I would like to understand
>> what that bad thing is.
>>
>> I have one explanation that I think says that the GTs will continue to
>> produce the 2000w, and that energy will go into the batteries in an
>> unregulated fashion. When does this end, when the batteries blow up? Is
>> that the consequence of not disconnecting the GT?
>>
>> With many thanks in advance for your help in understanding.
>>
>> Mark
>>
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