[RE-wrenches] hueRe: Parts List For AC Couple Disconnect

[Mark Frye]

Happy Hour, yes it is that time here in our home.

Thanks again, but I guess I don't see that there is a catastrophic 
result here, the BB raises the frequency and trips the GT. So what, as 
long as the BB returns to a standby.

On 11/3/2019 4:31 PM, Mark Frye wrote:
> 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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